2024-03-28T11:55:53Z
https://ejournal.undip.ac.id/index.php/index/oai
oai:ojs.ejournal.undip.ac.id:article/4075
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121029 2012 eng "
2302-5743
2086-5023
dc
Experimental and Numerical Study of Snuber in Hydrogen Compressor
Rahman, M. Shiddiqur
Dept. of Agricultural & Industrial Engineering, Hajee Mohammad Danesh Science & Technology University, Dinajpur
In hydrogen production, transportation and delivery system, compression is one of the most important issues. There develop inherently pressure pulsation in reciprocating hydrogen compressing system. An experiment has been conducted to investigate the performance of snubber as pulsation damper used in reciprocating compression system. CFD analysis is applied to get the pressure values at different parts of this snubber. Regression equations are also developed for amplitude at input and output of the snubber. A comparative study of pressure and amplitude
by experiment, regression equation and CFD model are performed for 35, 40 and 45 Hz motor frequency. These models results are varied by 3.975%, 3.516% and 3.787% from the experiment for those motor frequencies. The pressure losses in the snubber are also found almost similar values by the regression equation i.e. 0.026%, 0.033% and 0.018% deviations.
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4075
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7358
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Changes on the Physical-Chemical Properties of Kue delapan Jam on Various Steaming Time
Agustini, Sri
Baristand Industri Palembang
Array
This research intended to study browning reaction between glucose, fructose, and lipids with amino acids in real system during making Kue Delapan Jam. Research applied completely randomized design with steaming time as treatment ( 2, 4, 6, and 8 hours) with 3 replication. The development of color and browning index were ivestigated by using lightness, redness, yellowness, and total color difference (TCD) during reaction, and the absorbance of methanol extracts was measured at 420 nm in 40.0 mm silica. The development of texture was monitored by using Bookfield texture analyzer. Test results showed that steaming time influenced the color, browning index, texture, protein, and fat content of the cake significantly. Steaming time has no effect on water content. There were positive correlation between steaming time with TDC, redness, texture, and browning index during course. While for lightness, yellowness, pH, protein, and fat content indicated negative correlation. Changes on texture, TDC, browning index, protein, and fat content followed linear model.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7358
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4505
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130216 2013 eng "
2302-5743
2086-5023
dc
Performance of indigenous chicken under intensive rearing with various litter materials
Sulistyoningsih, M.
FPMIPA IKIP PGRI Semarang– Indonesia
Sunarti, Dwi
Suprijatna, Ejeng
Isroli, I.
The purpose of the research was to obtain information regarding the performance of indigenous chicken under intensive rearing. The performance criteria were the increasing body abdominal weight, fat, rectal temperature, and the indigenous chicken’s mortality within the 5-week starter phase treatment. Research was conducted using 108 Day Old Chick (DOC). Data variance was analysed based on the split plot design (3 types of cage litter materials, 5 weeks of data collection, and 4 replications) for weight gain and abdominal fat parameters, and completely randomized design in time for rectal temperature. The result indicated a significant effect of different litter materials towards weight gain (P <0.01), the highest body weight was found on chicken treated with rice straw litter; there was no effect of litter material on abdominal fat percentage; there was a significant effect (P < 0.01) of age towards rectal temperature; and there were no interactions between litter material with age, on body weight gain, abdominal fat, and rectal temperature. Chickens under intensive rearing in rice straw floored cages were proven to have a mortality rate reduced by 3.7% in the starter phase.
doi: http://dx.doi.org/10.12777/ijse.4.2.2013.52-56
[How to cite this article: Sulistyoningsih, M., Sunarti, D., Suprijatna, E., & Isroli, I. (2013). Performance of indigenous chicken under intensive rearing with various litter materials. INTERNATIONAL JOURNAL OF SCIENCE AND ENGINEERING, 4(2), 52-56; doi: http://dx.doi.org/10.12777/ijse.4.2.2013.52-56
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4505
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7972
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Assessment of Water Quality Using Macrobenthos as Bioindicator and Its Application on Abundance-Biomass Comparison (ABC) Curves
Pawhestri, Suci Wulan
Faculty of Science and Mathematics, DiponegoroUniversity, Semarang
Hidayat, Jafron. W
Faculty of Science and Mathematics, DiponegoroUniversity, Semarang
Putro, Sapto P
Faculty of Science and Mathematics, DiponegoroUniversity, Semarang
Array
Abstract -Activities of aquaculture and industry which is directly adjacent to an aquatic environment may potentially result in increasing organic matter and causes a decreasing quality of water in it. Macrobenthos can be used as an bioindicators to detect environmental disturbances occur in the aquatic environment. This study aims to determine the level of environmental disturbance in aquatic environments using macrobenthic assemblages and their application in the abundance and biomass curves and it was compared to the values of diversity and similarity indices. Locations of this study is polyculture ponds and coastal of PT. Kayu Lapis Indonesian located in Mororejo Village, Central Java. Based on the abundance of macrobenthos results shows that in coastal area of PT. Kayu Lapis Indonesia is dominated by Cirratulidae (60%) from Polychaeta while in polyculture ponds is dominated by Potamididae (58%). Based on the abundance and biomass comparison (ABC) curves, the polyculture ponds were categorized as undisturbed area, whereas the coastal area of PT. Kayu Lapis Indonesia was categorized as moderately polluted for the second sampling time. Whilst the values of diversity (H’) and similarity (e) indices indicated low for all stations, the ABC curve of macrobetnhic assemblages is effective to demonstrate the level of environmental disturbance occurs in aquatic environments.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7972
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5115
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Simulation of Traffic Flow Model with Traffic Controller Boundary
Sultana, Nahid
Bangladesh University, Dhaka
Parvin, Masuma
Sarker, Ronobir
Andallah, Laek Sazzad
Array
This paper considers a fluid dynamic traffic flow model appended with a closure linear velocity-density relationship which provides a first order hyperbolic partial differential equation (PDE) and is treated as an initial boundary value problem (IBVP). We consider the boundary value in such a way that one side of highway treat like there is a traffic controller at that point. We present the analytic solution of the traffic flow model as a Cauchy problem. A numerical simulation of the traffic flow model (IBVP) is performed based on a finite difference scheme for the model with two sided boundary conditions and a suitable numerical scheme for this is the Lax-Friedrichs scheme. Solution figure from our scheme indicates a desired result that amplitude and frequency of cars density and velocity reduces as time grows. Also at traffic controller point, velocity and density values change as desired manner. In further, we also want to introduce anisotropic behavior of cars(to get more realistic picture) which has not been considered here.
Doi: 10.12777/ijse.5.1.25-30
[How to cite this article: Sultana, N., Parvin, M. , Sarker, R., Andallah, L.S. (2013). Simulation of Traffic Flow Model with Traffic Controller Boundary. International Journal of Science and Engineering, 5(1),25-30. Doi: 10.12777/ijse.5.1.25-30]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5115
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8663
2015-06-12T13:27:27Z
ijse:EDT
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Front cover
MSi, Budiyono
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front cover
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8663
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5519
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Effect of Concentration of Catalyst (BF3-Diethyl Etherate) on Synthesis of Polyester From Palm Fatty Acid Distillate (PFAD)
Manurung, Renita
University of Sumatera Utara
Tanjung, Ahmad Rozi
University of Sumatera Utara
Ayuningrum, Ida
University of Sumatera Utara
Array
Palm Fatty Acid Distillate (PFAD) can be used as raw material for synthesis polyester. The aim of this research is to synthesis of polyester and to determine the effect of concentration of catalyst on polymerization methyl ester PFAD. The esterification stage was done at temperature 70oC, reaction time 120 minute, reactant ratio 1:8 (PFAD: methanol), concentration of catalyst (H2SO4) 1% (w/w) PFAD; polymerization stage was done at temperature 126-132°C, polymerization reaction time 4 hours; variation of concentration of catalyst (BF3-diethyl etherate) 0%, 6.9%, 9.2%, 11.5% (w/w) methyl ester; and polyesterification stage was done at temperature 175-200 oC, reactant ratios (w/w) 1:1 (polymerized ME : ethylene glycol), reaction time 4 hours and all of stage was stirred at 150 rpm. The results showed, in the esterification stage was obtained methyl ester with iodine value 77.29 g I2/100 g, viscosity 6.90 cP, density 859.91 kg/m3 and analysis by using GC-MS showed that the purity of methyl ester was 82.23% and molecular weight 267.97 g/mol. Decreasing in iodine value from 77.29 I2 g/100 g to 74.97-59.99 g I2/100 g indicated that the polymerization process had taken place. In polyesterification stage was obtained light brown colored liquid for concentration of catalyst 0%; viscous, light brown colored liquid for concentration of catalyst 6.9%; and gel polyester, viscous, dark brown colored solid at room temperature for concentration of catalyst 9.2% and 11.5% with acid value from 8.19 to 26.14 mg KOH/g, viscosity from 0.07 to 15.2 P, and molecular weight 288.81 to 1522.07 g/mol which is more suitable for applications of modified polyester. Analysis by using GC showed that the purity of polyester is equal to 65.49%.
Keywords— polyester, palm fatty acid distillate, polymerizationconcentration of catalyst,biodegradable polymer
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5519
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9533
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
dc
Bit Plane Coding based Steganography Technique for JPEG2000 Images and Videos
Kasana, Geeta
Computer Science and Engineering Department
Thapar University
Patiala
Singh, Dr Kulbir
Bhatia, Dr Satwinder Singh
Array
In this paper, a Bit Plane Coding (BPC) based steganography technique for JPEG2000 images and Motion JPEG2000 video is proposed. Embedding in this technique is performed in the lowest significant bit planes of the wavelet coefficients of a cover image. In JPEG2000 standard, the number of bit planes of wavelet coefficients to be used in encoding is dependent on the compression rate and are used in Tier-2 process of JPEG2000. In the proposed technique, Tier-1 and Tier-2 processes of JPEG2000 and Motion JPEG2000 are executed twice on the encoder side to collect the information about the lowest bit planes of all code blocks of a cover image, which is utilized in embedding and transmitted to the decoder. After embedding secret data, Optimal Pixel Adjustment Process (OPAP) is applied on stego images to enhance its visual quality. Experimental results show that proposed technique provides large embedding capacity and better visual quality of stego images than existing steganography techniques for JPEG2000 compressed images and videos. Extracted secret image is similar to the original secret image.
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9533
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5658
2013-11-03T22:28:15Z
ijse:BACK
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Instruction for Authors
Editor, IJSE
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Instruction for Authors
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5658
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1235
2018-07-16T14:43:55Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Organic Fertilizer Production From Cattle Waste Vermicomposting Assisted By Lumbricus Rubellus
Sumardiono, Siswo
Waste Treatment Laboratory, Department of Chemical Engineering Faculty of Engineering, Diponegoro University Semarang
Murwono, R.P. Djoko
Waste Treatment Laboratory, Department of Chemical Engineering Faculty of Engineering, Diponegoro University Semarang
Array
Composting is decomposition of compound in organic waste by specific treatment using microorganism aerobically. Natural composting for producing organic fertilizer from manure and market waste utilize long time processing and less equal to the market demand. Vermicomposting is a technique to produce high quality compos fertilizer from biodegradable garbage and mixture of red worm (Lumbricus Rubellus). In conventional compos production took 8 weeks of processing time, in vermicomposting only took half processing time of conventional technique. It is occurred by red worm additional ease cellulose degradation contain in manure which is could not decomposed with composting bacteria. The purposes of this research are to investigate the effect of manure comparison to red worm growth and to evaluate the effect of comparison between manure and market waste to red worm growth. This research was conducted by vary the weight of red worm (100 gr, 200 gr, 300 gr, 400 gr, 500 gr) and market waste addition (50 gr, 100 gr, 150 gr, 200 gr, 300 gr). Moreover, 3 kg of manure was mixed by various weight of red worm, while variation of market waste addition was involved 500 gr red worm and 3 kg manure mixture. Optimum increasing weight of red worm that was obtained by 100 gr red worm addition is 160 gr within 2 weeks. In added market waste variation, the highest increasing of red worm was resulted by 50 gr market waste addition, with 60 gr increasing weight of red worm. Production of casting fertilizer was highly effected by composition of used materials such as medium, manure and red worm comparison as well as market waste additional
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1235
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/20076
2019-04-23T22:04:33Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
Source apportionment of PM2.5 bound Polycyclic Aromatic Hydrocarbons from a Tricity in the foothills of Himalayas in Northern India
Garg, Sandeep
Thapar University
rajor, Anita
Dhir, Amit
Array
This study highlights variability in mass levels and source identification of PM2.5 bound polycyclic aromatic hydrocarbons (PAHs) in the tricity of Chandigarh, Mohali and Panchkula in India. The samples of PM2.5 werecollected from industrial and residential and sensitive receptor sites during summer (April-May 2015) and winter (December 2015-January 2016) season. Sampling was done using medium volume sampler and chemical analysis was done using gas-chromatography technique. The average mass levels of PM2.5 varied from 31 to 91 µg m-3 exceeding to NAAQ standard of 60µg m-3 and total PAHs varied from 5.76 to 75.62 ngm-3 with a seasonal variability as higher in winter than in summer season. The positive correlation between PM2.5 & TPAHs suggested similarity in source and origin. Diagnostic ratio and principal components analysis suggested vehicular emissions, coal combustion, wood and biomass burning as the main source of PAHs in the study area for potential health hazards.
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/20076
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/20076/52454
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/6279
2015-06-11T08:09:21Z
ijse:ART
nmb a2200000Iu 4500
"140302 2014 eng "
2302-5743
2086-5023
dc
INFORMAL AND FORMAL SECTORS PARTNERSHIP IN URBAN WASTE MANAGEMENT (Case Study: Non-Organic Waste Management in Semarang)
Indrosaptono, Djoko
Architecture Department, Faculty of Engineering, Diponegoro University
Buchori, Imam
Doctorate Program of Urban Architecture Engineering, Diponegoro University
Alie Syahbana, Joesron
Master Program of Urban Planning Department. Post Graduate Program Diponegoro University
Array
The urban waste management is still crucial issues in most regions in Indonesia. Urban waste is considered as a cultural issue because of its impact on various life factors , especially in big cities such as Jakarta, Semarang, Surabaya, Bandung, Palembang and Medan. Currently, the average productivity of the urban waste is 0.5 kg / capita / day. If this is multiplied by number of people in some cities in Java and Bali, the total waste will reach about 100,000 tons / day. This number will still increase by increasing population growth. Therefore, the urban waste management is very important for cities in Indonesia, alhough currently not many cities applied the urban waste management system. Urban waste management in Indonesia is not merely caused by formal sector, but it is also supported by informal sector in reducing daily production waste up to 30%. The informal sector management is mainly conducted by sorting the waste to recycleable or not. The recycleable waste is then sold back to the mills to be converted to other valuable products. This reserach was aimed to evaluate the partnership between formal and informal sector in reduction of waste production in Semarang city through urban waste management system. The research about informal sector was conducted by communal interaction and qualitative analysis focusing at Semarang City especially at Old Town area. The research has provided substantive knowledge of informal sector partnerships and formal sector in urban waste management with case inorganic waste management in the city of Semarang through 3R (recycle, reuse and reduce) knwoledge management. Basic knowledge of the structure / surface is characterized by empirical knowledge which was easily caught by the direct perspective of human. Middle knowledge could be adjusted to different loci
Chemical Engineering Diponegoro University
2014-01-06 15:07:24
https://ejournal.undip.ac.id/index.php/ijse/article/view/6279
International Journal of Science and Engineering; ARTICLE IN PRESS
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1264
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
A Technical Approach on Large Data Distributed Over a Network
G, Suhasini
1Ganapathy College of Engineering, Warangal
Billa, Mamtha
Ramappa Engineering college, Warangal
P, Ashwini
Vaagdevi Engineering College,Warangal
Data mining is nontrivial extraction of implicit, previously unknown and potential useful information from the data. For a database with number of records and for a set of classes such that each record belongs to one of the given classes, the problem of classification is to decide the class to which the given record belongs. The classification problem is also to generate a model for each class from given data set. We are going to make use of supervised classification in which we have training dataset of record, and for each record the class to which it belongs is known. There are many approaches to supervised classification. Decision tree is attractive in data mining environment as they represent rules. Rules can readily expressed in natural languages and they can be even mapped o database access languages. Now a days classification based on decision trees is one of the important problems in data mining which has applications in many areas. Now a days database system have become highly distributed, and we are using many paradigms. we consider the problem of inducing decision trees in a large distributed network of highly distributed databases. The classification based on decision tree can be done on the existence of distributed databases in healthcare and in bioinformatics, human computer interaction and by the view that these databases are soon to contain large amounts of data, characterized by its high dimensionality. Current decision tree algorithms would require high communication bandwidth, memory, and they are less efficient and scalability reduces when executed on such large volume of data. So there are some approaches being developed to improve the scalability and even approaches to analyse the data distributed over a network.[keywords: Data mining, Decision tree, decision tree induction, distributed data, classification]
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1264
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
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oai:ojs.ejournal.undip.ac.id:article/6775
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
New Concept of Cultivation Using Limited Strip-Tillage with Strip Shallow Irrigation
Intara, Yazid Ismi
Agricultural Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Sapei, A
Civil and Agricultural Environment Department of Agricultural Technology Faculty, Bogor Agricultural University
Erizal, Erizal
Civil and Agricultural Environment Department of Agricultural Technology Faculty, Bogor Agricultural University
E. S, Namaken
Bio-system Engineering Department of Agricultural Technology Faculty, Bogor Agricultural University
Joefrie, M. Bintoro
Agronomic and Horticulture Department of Agricultural Faculty, Bogor Agricultural University
Array
Dry land is one of land resources which potentially used for food crop cultivation, especially in the areas which have light to medium technical obstacles. The development of technology to improve soil quality in marginal lands to be productive lands is still widely open for agricultural development in Indonesia. Rooting medium quality can be improved by changing soil tillage method and observing the proper crop irrigation technology. It can be the solution for crop cultivation in clay loam soil. This study aimed to obtain water movement model in a minimally-tilled clay soil with strip shallow irrigation. The concept is limited soil-tillage with strip shallow irrigation method, water supply technique, and crop water requirement. Method used in this study includes developing water movement model (software development) in a minimally-tilled clay soil with subsurface irrigation. In the final stages, research also conducted water movement analysis testing apparatus in the laboratory, field validation of the subsurface irrigation performance, and cultivation technique testing to chili pepper growth (Capsicum annuumL.). The development of water movement simulation on a limited strip-tillage with subsurface irrigation uses the concept to quantify the amount of water in the soil. The analysis of movement pattern was demonstrated on contour patterns. It showed that the wetting process can reach depth zone – 5 cm to the rooting zone. It was an important discovery on the development of minimum stripe tillage soil with subsurface irrigation. Specifically, it can be concluded that: the result of fitting by eyes to diffusivity graphic and water content obtained the required parameter values for soil physical properties. It was then simulated on horizontal water movement model on a minimum strip-tillage with strip shallow irrigation
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6775
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3008
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Effects of Amofer Palm Oil Waste-based Complete Feed to Blood Profiles and Liver Function on Local Sheep
Mayulu, Hamdi
Sunarso, S
Imam Sutrisno, C.
Sumarsono, S
Amoniation-Fermentation (amofer) technology should be conducted in order to improve the low quality of by product produced from palm oil plantations and mills (palm oil waste) which is used for constituent of feed ingredients in complete feed (CF). This technology also reforms the feed material into edible form. Before broadly applicable, it must be ensured that the feed does not have toxic effects on livestock. This research was peformed to evaluate the effects of amofer palm oil waste-based CF to blood profile and liver function on local sheep. Completely Randomly Design (CRD) was used with 4 treaments and 4 replications. The observed variables were the levels of hemoglobin, hematocrit, blood glucose, ALT and AST was analyzed by ANOVA. The average value of blood glucose levels at T1= 80.68 mg/dl, T2=79.08 mg/dl, T3=81.18 mg/dl and T4=73.70 mg/dl. The average value of hemoglobin levels at T1=10.80 g/dl, T2=10.30 g/dl, T3=11.23 g/dl and T4=10.25 g/dl. The average value of hematocrit levels at T1=31.00%, T2=31.00%, T3=33.75% and T4=30%. The average value of ALT levels at T1=17.90 ml, T2=13.83 ml, T3=18.75 ml and, T4=13.40 ml. The average value of AST level at T1=106.20 ml, T2=88.98 ml, T3=104.40 ml and T4=91.25 ml. There was no significant difference among four treatments (p>0.05). The administration CF did not cause hematological disorders which showed by the blood profiles and liver function were in normal range, so that suggested the CF was appropriate and safe for local sheep.
[Keywords––amofer, complete feed, hemoglobin, hematocrit, glucose, liver function]
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3008
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6935
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
The Autonomous Development Strategies of Micro and Small Entrepreneurs Through Coorporate Social Responsibility in Bogor District of West Java
Maad, Faizal
Nusa Bangsa University, Jl. Kh. Soleh Iskandar Km 4, Bogor-16166
Sumardjo, Sumardjo
Department of Society’s Communication and Development Faculty of Human Ecology, Bogor Agricultural University IPB Campus Dramaga Bogor
Saleh, Amiruddin
Department of Society’s Communication and Development Faculty of Human Ecology, Bogor Agricultural University IPB Campus Dramaga Bogor
Muljono, Pudji
Department of Society’s Communication and Development Faculty of Human Ecology, Bogor Agricultural University IPB Campus Dramaga Bogor
Array
The objective of this reseach were to: (1) analyze the level of autonomous of mikro and small entreprise (SMEs) entrepreneurs are empowered through Coorporate Social Responsibility (CSR); (2) analyze the dominant factors that influence autonomous of MSEs entrepreneurs are empowered through CSR; and (3) formulate an appropriate a strategy in developing autonomy of MSEs entrepreneurs through CSR. The reseach was conduct in the village built two companies running CSR in Bogor district involved 212 (SMEs) entrepreneurs which determined from population (450 SMEs entrepreneurs) by Solvin formula with level of error 5 % and drawn by cluster random sampling. Data collection was conducted from July to November 2013, and consisted the primary and secondary data. Data analysis was simulated by using structural equation model (SEM ). The results showed that the degree of autonomous MSEs entrepreneurs is low, its core was 36.89 out of 100.00. There are three strategies that must be done to develop of autonomous MSEs entrepreneurs through CSR, such as; (a) an increase the empowerment sustainable of MSEs entrepereneurs (b) improve the quality of the environment supporting MSEs and (c) an increase in intensity of empowerment for MSEs entrepreneurs.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6935
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7176
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
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Experimental Design of Electrocoagulation and Magnetic Technology for Enhancing Suspended Solids Removal from Synthetic Wastewater
Ni'am, Moh Faiqun
Faculty of Engineering, Universitas Islam Sultan Agung, Semarang
Othman, Fadil
Dept. of Environmental Eng., Fac. Of Civil Eng., Universiti Teknologi Malaysia, Johor
Array
Design of experiments (DOE) is one of the statistical method that is used as a tool to enhance and improve experimental quality. The changes to the variables of a process or system is supposed to give the optimal result (response) and quite satisfactory. Experimental design can defined as a test or series of test series by varying the input variables (factors) of a process that can known to cause changes in output (response). This paper presents the results of experimental design of wastewater treatment by electrocoagulation (EC) technique. A combined magnet and electrocoagulation (EC) technology were designed to increase settling velocity and to enhance suspended solid removal efficiencies from wastewater samples. In this experiment, a synthetic wastewater samples were prepared by mixing 700 mg of the milk powder in one litre of water and treated by using an acidic buffer solution. The monopolar iron (Fe) plate anodes and cathodes were employed as electrodes. Direct current was varied in a range of between 0.5 and 1.1 A, and flowrate in a range of between 1.00 to 3.50 mL/s. One permanent magnets namely AlNiCo with a magnetic strength of 0.16T was used in this experiment. The results show that the magnetic field and the flowrate have major influences on suspended solids removal. The efficiency removals of suspended solids, turbidity and COD removal efficiencies at optimum conditions were found to be more than 85%, 95%, and 75%, respectively.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7176
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/4287
2012-12-31T07:26:52Z
ijse:ART
nmb a2200000Iu 4500
"121216 2012 eng "
2302-5743
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3D Room Visualization on Android Based Mobile Device (with Philips™’ Surround Sound Music Player)
Etgar, Durio
Electrical EngineeringDiponegoro University
Jl. Prof Sudharto, Tembalang, Semarang
Amien Syafei, Wahyul
Zijlmans, Jack
2Fontys University of Applied Sciences
Rachelsmolen 1, 5612 MA Eindhoven
Yuan, Zhaorui
This project’s specifically purposed as a demo application, so anyone can get the experience of a surround audio room without having to physically involved to it, with a main idea of generating a 3D surround sound room scenery coupled with surround sound in a handier package, namely, a “Virtual Listen Room”. Virtual Listen Room set a foundation of an innovative visualization that later will be developed and released as one of way of portable advertisement. This application was built inside of Android environment. Android device had been chosen as the implementation target, since it leaves massive development spaces and mostly contains essential components needed on this project, including graphic processor unit (GPU). Graphic manipulation can be done using an embedded programming interface called OpenGL ES, which is planted in all Android devices generally. Further, Android has a Accelerometer Sensor that is needed to be coupled with scene to produce a dynamic movement of the camera. Surround sound effect can be reached with a decoder from Phillips called MPEG Surround Sound Decoder. To sum the whole project, we got an application with sensor-dynamic 3D room visualization coupled with Philips’ Surround Sound Music Player. We can manipulate several room’s properties; Subwoofer location, Room light, and how many speakers inside it, the application itself works well despite facing several performance problems before, later to be solved.
[Keywords : Android,Visualization,Open GL; ES; 3D; Surround Sensor]
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4287
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/7955
2015-06-12T13:27:27Z
ijse:ART
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"150115 2015 eng "
2302-5743
2086-5023
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The impact of the local dairy cattle farm toward the river water quality in Gunungpati Subdistrict Central Java
Widiastuti, E.
The Faculty of Animal and Agriculture Science of Diponegoro University
Tembalang Campus, Semarang
Kustono, Kustono
2The Faculty of Animal Science of Gadjah Mada University Jl. Fauna Bulaksumur, Yogyakarta
Adiarto, Adiarto
2The Faculty of Animal Science of Gadjah Mada University Jl. Fauna Bulaksumur, Yogyakarta
Nurliyani, Nurliyani
2The Faculty of Animal Science of GadjaH Mada University Jl. Fauna Bulaksumur, Yogyakarta
Array
People’s awareness on the living environment nowadays is not yet comes up to the dairy-farmer community. In fact, the dairy-farm subsector contributes load pollution in the form of waste. The waste that is produced by a dairy-farm can be in the form of solid waste and liquid waste. There is still no cultivation effort toward the wastes in a traditional dairy-farmyet, thus most of the wastes are disposed to the closest river, so that in the surrounding dairy farm area is frequently found pollution toward the water quality. The aim of this study is to identify the effect of environment pollution that is caused by local dairy farm in Gunungpati Sub-district, especially toward the river water and residents’ well. The result of this study in Nangkasawit Village before and after the dairy farm was build was still under the quality standard for the third rate water quality. In Plalangan Village, the water quality was also under the quality standard, except for COD concentration. In the Sumurejo Village there was an upturn tendency on the observation value, but the water quality was under the quality standard, except for Fe concentration. Based on the Biodiversity Index before and after the dairy farm was established in Nangkasawit, Plalangan, and Sumurejo were 2.22, 1.49, 2.11, 1.90, 1.78, and 1.88, respectively. It means that Nangkasawit showed no pollution before the dairy farm was established, while there was a medium pollution after the dairy farm establishment. In Plalangan, the water was clear, but it was light polluted after the dairy farm was established. In Sumurejo, before and after the dairy farm establishment the water was light category pollution.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7955
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/4747
2013-04-17T00:30:05Z
ijse:BACK
nmb a2200000Iu 4500
"130417 2013 eng "
2302-5743
2086-5023
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Instruction for Authors
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Instruction for Authors
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4747
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/8316
2015-07-28T13:49:35Z
ijse:ART
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"150415 2015 eng "
2302-5743
2086-5023
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Correlation Equations of Heat Transfer in Nanofluid Al2O3-Water as Cooling Fluid in a Rectangular Sub Channel Based CFD Code
Ramadhan, Anwar Ilmar
University of Muhammadiyah Jakarta
Lasman, As Natio
Nuclear Energy Regulatory Agency (BAPETEN) Republic of Indonesia
Septilarso, Anggoro
Nuclear Energy Regulatory Agency (BAPETEN) Republic of Indonesia
Array
Safety is a major concern in the design, operation and development of a nuclear reactor. One aspect of nuclear reactor safety factor is thermal-hydraulics aspect. In a PWR-type nuclear power plant has been used lighter fluid coolant is water or H2O. In this research, using nanofluid Al2O3-Water with volume fraction of (1%), (2%) and also (3%), used as a cooling fluid in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement. This research was carried out modeling of fuel elements are arranged rectangular, then performed numerical simulations using Computational Fluid Dynamics (CFD) code. In order to obtain the characteristic pattern of flow velocity of each fluid, the fluid temperature distribution along the cylinder wall temperature distribution of the fuel element. Then analyzed the heat transfer in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement, including heat transfer coefficient, Nusselt number (Nu), as well as heat transfer correlations. Heat transfer correlation for nanofluid Al2O3-Water (1%), (2%) and also (3%) proved to core of PWR nuclear reactor fuel element sub channel rectangular arrangement with the Reynolds number (Re) is stretched, namely: 404 096 <Re <423 084 and with constant heat flux is 2600 W / m2, and the composition ratio (pitch / diameter) 1.33.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8316
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5325
2013-12-14T09:22:22Z
ijse:ART
nmb a2200000Iu 4500
"130818 2013 eng "
2302-5743
2086-5023
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Correlation of Vapor-Liquid Equilibria for Commonly Used Binary Systems in Supercritical Fluid Extraction Processes
Atashrouz, Saeid
Petrochemical Engineering Department, Amirkabir University of Technology (Tehran
Polytechnic), Mahshahr Campus, Mahshahr
Mirshekar, Hamed
Petrochemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Mahshahr Campus, P.O. Box 415, Mahshahr
Bagheri, Hamid
Petrochemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Mahshahr Campus, P.O. Box 415, Mahshahr
Array
In this paper, a comprehensive mathematical model is developed based on the Feed-ForwardBack Propagation Artificial Neural Network (FFBP-ANN). The model is employed for thecalculation of Vapor Liquid Equilibria (VLE) of four CO2-containing binary mixtures. Themixtures include CO2 - Tertpentanol was investigated at the temperature range from 313.14 to343.15 K. The following mixtures including CO2 - Isobutanol at 313.2 to 353.2 K, CO2 - methylacetate at 308.15 to 328.15 K and CO2 - diisopropyl ether at 265.15 to 333.15 K wereinvestigated as well. The related experimental data of open literature have been used to constructthe model. The results confirm that there is a reasonable conformity between the predicted valuesand the experimental data. Additionally, the ability of the ANN model is examined by comparison with the conventional thermodynamic models and ANN model predicted VLE datawith more accuracy.
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5325
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/8992
2016-02-06T11:14:37Z
ijse:MED
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"151015 2015 eng "
2302-5743
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Gas Chromatographic Method: Tool for Rapid and Sensitive Analysis of Residual Solvents in Amoxicillin and Ampicillin Tablets
Haque, Sk Manirul
Department of Chemical Engineering and Process Technology, Jubail Industrial College, Royal Commission of Jubail
Hossain, S M Zakir
University of Bahrain
Shanker, Prem
Departments of Quality Control, Blue Circle Organics Pvt Ltd, Ambernath, Maharashtra
Array
A simple and sensitive static head space gas chromatographic (SH-GC) method equipped with FID has been developed and validated for simultaneous determination of residual solvents e.g., methanol, dichloromethane and toluene in two therapeutic drugs such as amoxicillin and ampicillin. The separation was achieved with 30 m long Elite - 5 fused silica capillary column and 0.32 mm inner diameter. The developed SH-GC method offered symmetric peak shape, good resolution and reasonable retention time for all the solvents. Beer’s law was obeyed in the concentration ranges 100 – 1200, 50 – 1000 and 50 – 500 ppm for methanol, dichloromethane and toluene, respectively. The method was validated according to international conference on harmonization (ICH) guidelines in terms of specificity, linearity, precision, accuracy, limit of detection, limit of quantitation, robustness and solution stability. The degrees of linearity of the calibration curves, the percent recoveries, relative standard deviation for the method were also determined. All the validation parameters were within the acceptable range. The developed SH-GC method could, therefore, be suitable for simple and rapid detection of trace levels residual solvents in other pharmaceutical products and thereby it could be used for routine analysis in any analytical laboratory.
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8992
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/8992/20150
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oai:ojs.ejournal.undip.ac.id:article/5602
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"130115 2013 eng "
2302-5743
2086-5023
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Alternative Fiber Sources from Gracilaria Sp and Eucheuma Cottonii for Papermaking
Machmud, M. Nizar
Laboratory of Materials Engineering, Department of Mechanical Engineering, Faculty of Engineering, University of Syiah Kuala, Jln. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh
Fadi, Fauzan
Department of Mechanical Engineering, Faculty of Engineering, University of Syiah
Kuala, Jln. Tgk. Syech Abdurrauf No. 7,
Darussalam, Banda Aceh
Fuadi, Zahrul
Laboratory of Materials Engineering, Department of Mechanical Engineering, Faculty of Engineering, University of Syiah Kuala, Jln. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh
Kokarkin, Coco
Ministry of Marine Affairs and Fisheries Republic of Indonesia, Directorate General of
Aquaculture, Brackish water Aquaculture Development Centre Ujung Batee, Jln. Krueng Raya Km. 16, Ujung Batee, PO. BOX. 46, Banda Aceh
Array
Private sectors have invested in the technology to grow some Gelidialian red algae families and also tried to convert the algae to pulp and paper over the last few years in order to replace raw materials from wood. Several modern systems with their all complexities which are similar to the wood pulp-based papermaking technology have been offered to overcome any recent issues settle in the converting process. Chemical bleaching agents have even been still a standard treatment that must be established for properly converting the algae pulp to a sheet of paper. In this present work, the two genus of red algae, called Gracilaria and Eucheuma, were simply processed to make pulps without use of any bleaching chemical agents. The potential use of pulps made of the red algae as raw materials for papermaking was mechanically studied by testing the sheets made of the red algae through a tensile test at a room temperature under 20 mm/min according to ASTM D 828-97 (2002). Tensile properties of the proposed algae-based paper sheets obtained under the constant rate are discussed. Tensile properties of the selected wood-based paper sheets obtained under the same condition are also presented in this paper. The results showed that pulps made of the red algae would be the alternative to those of the wood and other natural fibers as raw materials for papermaking.
Doi: 10.12777/ijse.6.1.1-10
[How to cite this article: Arham, N.A., Mohamad, N.A.N., Jai, J., Krishnan, J., Noorsuhana Mohd Yusof, N.M. (2013). Application of Response Surface Methodology in Extraction of Bioactive Component from Palm Leaves (Elaeis guineensis). International Journal of Science and Engineering, 6(1),1-10. Doi: 10.12777/ijse.6.1.1-10
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5602
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1229
2011-12-11T17:51:09Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
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Bioconversions of Palm Kernel Cake and Rice Bran Mixtures by Trichoderma viride Toward Nutritional Contents
Sukaryana, Yana
Animal Husbandry-Lampung State Polytechnic, Jl.Soekarno-Hatta 10, Bandar Lampung, Indonesia
Atmomarsono, Umi
Doctoral Program Animal Science, University of Diponegoro, Semarang
Yunianto, Vitus D.
Doctoral Program Animal Science, University of Diponegoro, Semarang
Supriyatna, Ejeng
Doctoral Program Animal Science, University of Diponegoro, Semarang
The objective of the research is to examine the mixtures of palm kernel cake and rice bran of fermented by Trichoderma viride. Completely randomized design in factorial pattern 4 x 4 was used in this experiment. factor I is the doses of inoculums; D1 = 0%, D2 = 0,1% , D3 = 0,2%, D4 = 0,3%, and complement factor II is mixtures of palm kernel cake and rice bran : T1=20:80% ; T2=40:60% ; T3=60:40% ; T4=80:20%. The treatment each of three replicate. Fermentation was conducted at temperature 28 oC as long as 9 days. Determining the best of the mixtures be based on the crude protein increased and the crude fibre decreased. The results showed that the combination of product mix is the best fermentation inoculums doses 0.3% in mixture of palm kernel cake and rice bran ; 80%: 20%, which produces dry matter of 88,12%, crude protein 17.34%, ether extract 5,35%, crude fibre 23.67%, and ash 6.43%. When compared with a mixture of palm kernel cake and rice bran; 80%: 20% without of fermentation is crude protein increase 29.58% and crude fibre decreased 22.53%.
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1229
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
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oai:ojs.ejournal.undip.ac.id:article/12180
2018-01-17T08:30:49Z
ijse:ART
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"160415 2016 eng "
2302-5743
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The Feed Intake and Daily Weight Gain of Locally Sheep Fed with Amofer Palm Oil Plantation and Mill’s Byproduct-based Complete Feed
Mayulu, Hamdi
Animal Feed and Nutrition Laboratory, Faculty of Agricultural Sciences, Mulawarman University
Suhardi, Suhardi
Animal Feed and Nutrition Laboratory, Faculty of Agricultural Sciences, Mulawarman University
Array
Livestock development through innovation of complete feed (CF) technology which cheap and potential could be optimized through utilizing palm oil plantation and mill’s by-product. The objective of this research was to analyze the effect of complete feed formulated with palm oil plantation and mill’s by-product to the feed intake and daily weight gain of sheep. Male thin tailed sheep 9 months old with average live weight of 14.69 kg were used in this research. CF was formulated from ammoniated-fermented of palm frond, palm leave, empty fruit bunch, and palm pressed fiber which mixed with Centrosema sp., palm kernel cake, corn, rice bran, dried cassava waste pulp, molasses, mineral mix and salt. The study used completely randomized design which consisted of T1=10%, T2=12%, T3=14% and T4=16% of crude protein and total digestible nutrient (TDN) 64% with 4 repetitions. Data was analyzed using ANOVA at 95% significance level which followed by Duncan Multiple Range Test. The experiment showed that the level of protein content influenced the feed intake. The highest average of dry matter intake, organic matter intake, crude protein intake and TDN were 865.83 g/sheep/day, 750.60 g/sheep/day, 118.66 g/sheep/day and 555.96 g/sheep/day, respectively. The highest average daily weight gain was 174.18 g/sheep/day which produced at crude protein level of 14% (T3). The statistical analysis showed that T3 was significantly different to T1, T2 and T4. It can be concluded that complete feed formulated from palm oil plantation and mill’s by-product with appropriate level of crude protein content could increase the feed intake and daily weight gain of local sheep
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
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https://ejournal.undip.ac.id/index.php/ijse/article/view/12180
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
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oai:ojs.ejournal.undip.ac.id:article/5762
2014-12-27T21:27:04Z
ijse:ART
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"140115 2014 eng "
2302-5743
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Subsurface Structure in Japan Based on P and S waves Travel Time Analysis Using Genetic Algorithm in Japan Seismological Network
Huda, A. M. Miftahul
ITS Surabaya
Santosa, Bagus Jaya
ITS SURABAYA
Array
Experiment to obtain the subsurface structure in Japan is conducted using seismograms analysis of earthquakes in Japan. All 101 data was used from events in 2012, selected by a maximum depth of 60 km and magnitude between 4.2 to 5.5 Mj. Determination of 1-D subsurface structure is done by utilizing the inversion method with genetic algorithm approach. P wave and S wave velocity structure are determined based on arrival times at receiver. The crustal thickness is known of 33,66 km. P wave velocity for the upper and lower crust, are 6,03 km/s and 6,92 km/s, respectively, and velocity in the upper mantle is 8,18 km/s. S wave velocity for the upper and lower crust are given 3,38 km/s and 3,89 km/s respectively, and the velocity in the upper mantle is 4,59 km/s. If the range integrated to the stable parameter of velocity structure, it shows stable result and the subsurface structure has sufficiently high compatibility.
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5762
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1282
2012-01-03T11:12:42Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Authors guideline
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Authors guideline
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1282
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
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oai:ojs.ejournal.undip.ac.id:article/6731
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
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Potency of Mahakam Delta in East Kalimantan, Indonesia
Zain, Zairin
Department of Transportation of East Kalimantan Province, Jl. Kusuma Bangsa Samarinda Kalimantan Timur
Hutabarat, Sahala
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Prayitno, Slamet Budi
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Ambaryanto, Ambaryanto
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Array
Mahakam Delta is not only utilized for fishery activities but also for several industrial purposes such as coal and oil mining, shipping and timber. The objective of this paper is to provide information in term of the potency of Mahakam Delta located in East Kalimantan province, Indonesia. The study was conducted in Mahakam Delta, East Kalimantan Province, Indonesia. Participatory rural appraisal is a group of methods to collect information in a participatory fashion from rural communities. The method employed in this research was descriptive analysis describing the environmental potency found in Mahakam Delta. Massive conversion of mangrove forest particularly Nypa (Nypa fruticans) area into pond has driven conflict among related stakeholders on the utilization of natural resource and land which subsequently impacts on the fish and shrimp source regeneration, loss of ecological functions of mangrove forest for feeding, nursery and spawning ground of fish and other organisms. Besides of fisheries, oil and gas activity also exists in Mahakam Delta. Mahakam Delta is regarded as important area due to the largest producer of oil and gas mining. Thus, oil and gas industry is the most reliable sector that contributes to the economic development of Kutai Kartanegara district. As a resource provider, Mahakam Delta ecosystem provides various resources for livelihoods. As a life-support service provider, Mahakam Delta ecosystem provides habitat and ideal environment to support variety of living kinds. As a convenience provider, Mahakam Delta ecosystem provides unique and interesting recreation site. As a protector from natural disaster, Mahakam Delta ecosystem is able to protect human kinds from natural disaster threatening coastal area.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6731
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1309
2012-01-14T21:25:04Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
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Preface
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Preface
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1309
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
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oai:ojs.ejournal.undip.ac.id:article/6290
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
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Comparison of intelligent systems, artificial neural networks and neural fuzzy model for prediction of gas hydrate formation rate
Jalalnezhad, Mohammad Javad
Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman
Ranjbar, Mohammad
Young Researchers Society, Shahid Bahonar University of Kerman ,Kerman
Sarafi, Amir
Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman ,Iran 5.Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Nezamabadi-Pour, Hossein
Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman ,Iran 5.Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Array
The main objective of this study was to present a novel approach for predication of gas hydrate formation rate based on the Intelligent Systems. Using a data set including about 470 data obtained from flow tests in a mini-loop apparatus, different predictive models were developed. From the results predicted by these models, it can be pointed out that the developed models can be used as powerful tools for prediction of gas hydrate formation rate with total errors of less than 4%.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6290
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6290/13630
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oai:ojs.ejournal.undip.ac.id:article/4056
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121013 2012 eng "
2302-5743
2086-5023
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Drying Spirulina with Foam Mat Drying at Medium Temperature
Prasetyaningrum, Aji
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Djaeni, Mohamad
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Spirulina is a single cell blue green microalgae (Cyanobacteria) containing many Phytonutrients (Beta-carotene, Chlorophyl, Xanthophyl, Phyocianin) using as anti-carcinogen in food. Producing dry spirulina by quick drying process at medium temperature is very important to retain the Phytonutrient quality. Currently, the work is still challenging due to the gel formation that block the water diffusion from inside to the surface. This research studies the performance of foam-mat drying on production of dry spirulina. In this method the spirulina was mixed with foaming agent (glair/egg albumen, popular as white egg) at 2.5% by weight at air velocity 2.2 m/sec. Here, the effect of spirulina thickness and operational temperature on drying time and quality (Beta-carotene and color) were observed. The drying time was estimated based on the measurement of water content in spirulina versus time. Result showed that the thicker spirulina, the longer drying time. Conversely, the higher operational temperature, faster drying time. At thickness ranging 1-3 mm and operational temperature below 70oC, the quality of spirulina can fit the market requirement
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4056
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7231
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Condition and The Affecting Factors of Tanjung Jumlai Patch Reef in North Penajam Paser Regency East Kalimantan
Efendi, Muchlis
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Hutahaean, Sahat
Chevron Indonesia Company
A Budiarsa, Anugrah
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Hanjoko, T
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Array
Patch reef of Tanjung Jumlai which located in North Penajam Paser Regency, East Kalimantan Province has being suffered from stress and degradation, less studied and managed. Thus, this research was conducted to obtain data concerning on the reef condition and the affecting factors. The research was carried out from December 10 – 14, 2013. There were eight observation stations that surveyed using life form line intercept transect method to obtain data related with coral reef condition based on percent cover of live coral (LC) and coral mortality index (MI). The result showed that the lowest LC was 5% at ST 7 (poor/bad coral condition) and the highest LC was 78% (excellent condition), and the average LC was 42.5% (fair/moderate condition). The average coral mortality index was 0.34 with the lowest MI was 0.06 at ST 6 and the highest MI was 0.78 at ST 7. This study also found that anthropogenic factors (mainly from Balikpapan Bay) were more influential toward the reef condition of Tanjung Jumlai patch reef rather than non-anthropogenic factors.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7231
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4260
2013-02-21T20:34:35Z
ijse:ART
nmb a2200000Iu 4500
"121211 2012 eng "
2302-5743
2086-5023
dc
Path Tracking Controller of Quadruped Robot for Obstacle Avoidance Using Potential Functions Method
Hoang, Giang
Department of Mechanical and Automotive Engineering, Pukyong National University,
Busan 608-739, Korea
Kyeong Kim, Hak
Bong Kim, Sang
Path tracking; back stepping; obstacles avoidance; potential functions; quadruped robot
This paper proposes a tracking controller for obstacle avoidance of a quadruped robot using potential functions method. The followings are done for this task. At first, a ceiling-mounted camera system is installed for image processing. The goal point and obstacles are separated and recognized by a color recognition method. Second, a path planning algorithm using potential functions method is proposed to generate the path to avoid obstacles and to plan a path for the quadruped robot to reach from start point to goal point. Third, a quadruped robot is chosen as the mobile platform for this study and the kinematic model for the robot is presented. Fourth, a tracking controller is designed for the quadruped robot to track the trajectory based on the backstepping method using Lyapunov function. Finally, the simulation results are presented to show the effectiveness of the proposed trajectory planning algorithm and the tracking controller.
[Keywords— Path tracking; back stepping; obstacles avoidance; potential functions; quadruped robot].
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4260
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7597
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
PROCESSING OF WATERMELON RIND DEHYDRATED CANDY
Muhamad, Nur Farah Hani
Malaysian Agricultural Research and Development Institute (MARDI)
Wan Zainon, Wan Nur Zahidah
Malaysian Agricultural Research and Development Institute (MARDI)
Kormin, Saniah
Malaysian Agricultural Research and Development Institute (MARDI)
Mohd. Akhir, Nurasmaliza
Malaysian Agricultural Research and Development Institute (MARDI)
Ali, Muhammad Shah
Malaysian Agricultural Research and Development Institute (MARDI)
Array
Watermelon rind (Citrullus lanatus) dehydrated candy was prepared by using osmotic dehydration process that involves slow impregnation of syrup before drying at 50°C for 8, 14 and 20 hours. From the study, it can be seen that drying time significantly affected the moisture content of the watermelon rind dehydrated candy. The moisture content was significantly decreased with drying time. For colour evaluation, the L* value of watermelon rind dehydrated candy was slightly decreased with drying time while the a* value was slightly increased. Watermelon rind dehydrated candy that dried for 14 hours was the most preferred sample by the panelists as it received the highest score for texture, taste and overall acceptability attributes. So, it can be concluded that 14 hours of drying time is the most appropriate time to dry the candied watermelon rind.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7597
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7597/16533
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4687
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130328 2013 eng "
2302-5743
2086-5023
dc
Intake and Digestibility of Cattle’s Ration on Complete Feed Based-On Fermented Ammonization Rice Straw with Different Protein Level
Mayulu, Hamdi
Mulawarman University,Kampus Gunung Kelua Jl.Kuaro Samarinda
Sunarso, S.
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Christiyanto, M.
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Ballo, F.
SPPN Kupang, Jl.Timor Raya Km 39 Lili Kupang
Array
Complete feed (CF) utilization is expected to have impact on higher productivity due to increased intake and digestibility. The objective of research was to evaluate the effects of different level protein of CF based-on fermented ammonization (amofer) rice straw to Simmental offspring intake and digestibility Twenty males Simmental offspring with average live weight 372.15± 26.64 kg (coefficient of variance 7.16%) were used in this study. Feed treatment consisted of BC Nutrifeed 132 concentrate as control feed (T0) and CF based-on amofer rice straw consisted of T1, T2, T3 and T4 which had crude protein content 11, 12, 13 and 14% respectively and also total digestible nutrients (TDN) ± 62%. Completely randomized design with five treatments and four replicates were designed for this research. Data was analyzed by analysis of variance (ANOVA) at 95% significance level. The results showed that different crude protein did not affect the intake of dry matter, organic matter, crude protein and TDN. It was significantly affected the digestibility of dry matter, organic matter and crude protein (p<0.01). The highest digestibility was obtained to treatment with 12% crude protein and ± 62% TDN. Conclusion of this study was different level of crude protein constituted in CF which produced from specific material resource was proven to have impact in increasing cattle’s digestibility.
Doi: 10.12777/ijse.4.2.2013.86-91
[How to cite this article: Mayulu, H., Sunarso, S., Christiyanto, M. and Ballo, F. (2013). Intake and Digestibility of Cattle’s Ration On Complete Feed Based-On Fermented Ammonization Rice Straw With Different Protein Level. International Journal of Science and Engineering, 4(2),86-91. Doi: 10.12777/ijse.4.2.2013.86-91]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4687
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8266
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
INDONESIAN EFFORTS TO CONSERVE GEMBRONG GOATS
Hasinah, Hasanatun
Indonesian Center for Animal Research and Development (ICARD)
Inounu, Ismeth
Indonesian Center for Animal Research and Development (ICARD) http://scholar.google.co.id/citations?hl=en&user=6U67A5EAAAAJ
Subandriyo, Subandriyo
Indonesian Research Institute for Animal Production, Bogor
Array
Gembrong goat are mainly found in eastern part of Bali Island, especially in the village of Tumbu, Karangasem. Throughout Indonesia these goats are found no more than 50 heads. This condition puts Gembrong goat in a critical status that indicates the need of emergency and quick action. The present study was carried out to assess the characteristic of this breed and to preserve it through some proposed action plan. Information was obtained by personal observation and discussion with the leader of farmer group. Body weight (BW) and various body measurement were taken from 15 head of Gembrong goat. In general, the color of Gembrong goat body is white, or partly brown or solid brown. The average body weight is of 23.2 kg for females and 30.7 kg for males. The averages Body length of males is 60 cm, height 58.2 cm, and 14.4 cm ear length in males, and in females body length is 56.2 cm, height 55.1 cm and ear length 14.2 cm. To preserve Gembrong goat population from extinction collaborative activities is needed, namely: (1) multiplication of existing Gembrong goat population, (2) Rescuing animal genetic material and (3) up-grading female Kacang goat with Gembrong male goat as to achieve 99% Gembrong goat genetic composition.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8266
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5326
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
The Growth of Root Rot Disease on Pepper Seed Applied by Trichoderma Harzianum Inoculum
Sofian, S.
Department of Agro Technology, Faculty of Agriculture, Mulawarman University
Hadisutrisno, B.
Department of Phytopathology, Faculty of Agriculture, Gadjah Mada University
Priyatmojo, A.
Department of Phytopathology, Faculty of Agriculture, Gadjah Mada University
Array
Root rot disease on pepper caused by Phytophthora capsici is one of the most important diseases on pepper. The using of antagonistic fungus of Trichoderma harzianum as a biological control agent of the pathogen is one of the important alternatives in controlling P. capsici without causing negative effects on the environment. The objectives of the research were to study about the ability of T. harzianum inoculum application in inhibiting the development of root-rot disease, influenced the growth of pepper seed, to studythe effective length time application of T. harzianum inoculum in inhibiting the development of root rot disease, and increased the growth of pepper seedlings. This research was arranged in a completely randomized design, with five treatments of length time application of T. harzianum inoculum i.e. control treatment without applicationtime of T. harzianum inoculum (K), application time of T. harzianum inoculum for 0 week (S0), application time of T. harzianum inoculum for 1 week (S1), application time of T. harzianum inoculum for two weeks (S2), application time of T. harzianum inoculum for three weeks (S3), and application time of T. harzianum inoculum for 4 weeks (S4) before planting. Each treatment was repeated15 times. The observed parameterswere disease percentage, the inhibition of antagonistic fungus, disease infection rate, plant height, number of leaves, wet and dry weight of plant, stem and leaves on pepper seed, and P. capsici population density. The result showed that application time of T. harzianum inoculumfor 4 weeks (S4) before planting is the most effective time in inhibiting the development of root rot disease than the other treatment sand also had significant effect on increasing the growth of pepper seed. The antagonism test showed that T. harzianum could inhibit P. capsiciin vitro. This result proves that application time of T. harzianum inoculums for 4 weeks (S4) before planting is more effective in inhibiting the development of root rot disease and able to increase the growth of pepper seed
Doi: 10.12777/ijse.5.1.49-54 [How to cite this article: Sofian, B. Hadisutrisno, A. Priyatmojo. (2013). The Growth of Root Rot Disease on Pepper Seed Applied by Trichoderma Harzianum Inoculum. International Journal of Science and Engineering, 5(1):49-54. Doi: 10.12777/ijse.5.1.49-54 ]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5326
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8192
2015-11-20T09:43:11Z
ijse:ART
nmb a2200000Iu 4500
"150715 2015 eng "
2302-5743
2086-5023
dc
Six-Correction Logic (SCL) Gates in Quantum-dot Cellular Automata (QCA)
Rahman, Md. Anisur
Waheed, Sajjad
Habib, Md. Ahsan
Bahar, Ali Newaz
Lecturer
Department of Information and Communication Technology (ICT)
Mawlana Bhashani Science and Technology University (MBSTU)
Santosh, Tangail - 1902,Bangladesh
Array
Quantum Dot Cellular Automata (QCA) is a promising nanotechnology in Quantum electronics for its ultra low power consumption, faster speed and small size features. It has significant advantages over the Complementary Metal–Oxide–Semiconductor (CMOS) technology. This paper present, a novel QCA representation of Six-Correction Logic (SCL) gate based on QCA logic gates: the Maj3, Maj AND gate and Maj OR. In order to design and verify the functionality of the proposed layout, QCADesigner a familiar QCA simulator has been employed. The simulation results confirm correctness of the claims and its usefulness in designing a digital circuits.
Chemical Engineering Diponegoro University
2015-11-07 22:26:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8192
International Journal of Science and Engineering; Vol 9, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5569
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Turbidity Measurement Using An Optical Tomography System
Ibrahim, Sallehuddin Bin
UNIVERSITI TEKNOLOGI MALAYSIA http://www.perdanaschool.utm.my/downloads/associate/PM.%20Dr.%20Sallehuddin.pdf
Array
Turbidity is used to describe water quality and it can be caused by the presence of suspended particles and organic matter such as algae, clay and silt. The measurement of turbidity level of water is vital to domestic water supplies since it is related to public health and water treatment process. This paper presents an investigation on an optical tomography system to estimate the turbidity level in a sample of water. The optical sensors consist of infrared light-emitting diodes (LED) as transmitters and photodiodes as the receivers where the projections of the sensors are designed in fan beam mode. The system was tested using a vertical flow pipe. The Independent Component Analysis (ICA) method was used to display the concentration profile. Results obtained proved that the technique can provide the concentration profile representing the turbidity level of water.
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5569
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/11505
2018-01-17T08:30:49Z
ijse:ART
nmb a2200000Iu 4500
"160415 2016 eng "
2302-5743
2086-5023
dc
TECHNO ECONOMY ANALYSIS A SMALL SCALE REVERSE OSMOSIS SYSTEM FOR BRACKISH WATER DESALINATION
Widiasa, I Nyoman
Diponegoro University
Yoshi, Linda Aliffia
Diponegoro University
Array
This study aims to get the design process and the economics of small-scale desalination of brackish water in Indonesia which has interest in the range of 12-14%, electricity cost of $0.09-0.13/kWh, and groundwater tax regulation. The use of BWRO desalination system in Indonesia has been generally done at small scale. This study based on Bali island with electricity cost at $0.1/kWh and water tax at $0.37/m3. Techo economy evaluation was analysed for plant capacity of 150-1,00 m3/day, recovery of 40% with brackish water water salinity of 5,000 ppm. Price of desalted water during first year a case study is $1.31/m3. It can be concluded that economic evaluation based on NPV and IRR shows that it is worthed.
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/11505
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5721
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Comparison the physicochemical properties of bunch press fibre cellulose and cyclone fibre cellulose of waste from industry Crude Palm Oil (CPO)
Gustian, Irfan
Department of Chemistry-Faculty of Mathematics and Natural Sciences,
Universitas Bengkulu
Angasa, Eka
Department of Chemistry-Faculty of Mathematics and Natural Sciences,
Universitas Bengkulu
Ghufira, G
Department of Chemistry-Faculty of Mathematics and Natural Sciences,
Universitas Bengkulu
Miliani, M
Department of Chemistry-Faculty of Mathematics and Natural Sciences,
Universitas Bengkulu
Hairulumah, H
Department of Chemistry-Faculty of Mathematics and Natural Sciences,
Universitas Bengkulu
Array
Study on comparison the physicochemical properties of bunch press fibre cellulose (Bpfc) and cyclone fibre cellulose (Cfc) wastes from industry Crude Palm oil (CPO) have been performed. The physicochemical properties both of celluloses have been done such as the average degree of polymerization (DP), solubility properties, functional group analysis, thermal properties and X-ray diffraction patterns. The average degrees of polymerization (DP) have been obtained 2195 and 567 for Bpfc and Cfc. Bunch press fibre cellulose and cyclone fibre cellulose were soluble in cupriethylenediamine (CED). FT-IR analysis showed the same pattern of spectrum but different intensities. Thermal stability of bunch press fibre cellulose and cyclone fibre cellulose remains stable up to a temperature of 250 °C. Glass transition bunch press fibre cellulose greater than the glass transition cyclone fibre cellulose and X-ray diffraction pattern shows the same pattern and intensity varies.
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5721
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/5721/12547
https://ejournal.undip.ac.id/index.php/ijse/article/download/5721/12548
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1247
2012-01-03T11:12:42Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Potential Production of Polyunsaturated Fatty Acids from Microalgae
Handayani, Noer Abyor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Ariyanti, Dessy
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Hadiyanto, Hady
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Currently, public awareness of healthcare importance increase. Polyunsaturated fatty acid is an essential nutrition for us, such arachidonic acid, docosahexaenoic acid and eicosapentaenoic acid. The need of Polyunsaturated fatty acid generally derived from fish oil, but fish oil has a high risk chemical contamination. Microalgae are single cell microorganism, one of Phaeodactylum tricornutum which have relatively high content of eicosapentaenoic acid (29,8%). Biotechnology market of Polyunsaturated fatty acid is very promising for both foods and feeds, because the availability of abundant raw materials and suitable to develop in the tropics. This literature review discusses about the content of Polyunsaturated fatty acid in microalgae, omega-3, omega-6, Polyunsaturated fatty acid production processes, and applications in public health
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1247
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6667
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Feasibility study of Using Liquid Gel in Stabilizing Doogh by Hydrocolloids of Psyllium Husk and Guar Gum
Vardanjani, Tayebeh Tavakoli
Department of Food Science and Technology, Shahrekord Branch, Islamic Azad University, Shahrekord
Hojjatoleslamy, Mohammad
2Faculty Member of Agriculture, Department of Food Science and Technology, Shahrekord Branch, Islamic Azad University, Shahrekord
Shariati, Mohammad Ali
Department of Food Science and Technology, Science and Research Branc , Islamic Azad University, Tehran
Array
Liquid gel technology is a method that applies in stabilizing of suspension and dispersion of solid particles in beverages. Doogh which is an Iranian traditional and functional drink has allocated a unique position among consumers. Precipitation of hydrocolloids in Doogh has been always one of the most important challenge in producing this drink. Base of this fact, this study deals with using liquid gel technology (Guar gum and Hydrocolloids of Psyllium Husk ) .Different hydrocolloids concentration (0.01, 0.03, 0.05 %w/w) in Doogh heated to be hydrated at 80 ˚C resulting in producing Gel. Their flow behavior, particle distribution and microstructure analyzed, phase separation also evaluated by measuring volume of separated phases .Guar remarkably effected on Doogh flow behavior and caused to a high apparent viscosity in low shear rates, changing microstructure therefore changing particles size as well. It also subtracted the volume of separated phase .Xanthan and Psyllium increased stability of Doogh by increasing more repulsive force between particles, however larger particles precipitated. Samples containing Guar Gum indicated more yield stress.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6667
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1310
2012-01-14T21:24:07Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Table of contents
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Table of contents
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1310
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6136
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
THE EFFECT OF INFLUENT CONCENTRATION AND HYDRAULIC LOADING RATE (HLR) TO BOD AND COD REMOVAL ON ARTIFICIAL DOMESTIC WASTEWATER TREATMENT (GREY WATER) USING UASB REACTOR
Syafrudin, Syafrudin
Doctoral Program of Environmental Science, University of Diponegoro
Sudarno, Sudarno
Department of Environmental Engineering, University of Diponegoro
Purwanto, Purwanto
Novitasari, Iin
Department of Environmental Engineering, University of Diponegoro
Array
Upflow anaerobic sludge blanket (UASB) reactor is one of anaerobic biological treatment was develop in late 1970’s. UASB reactor is suitable for the tropic areas because it has a high temperature about 20°-30°C. Domestic wastewater is divided into two types, namely black water and grey water. But in this case used domestic grey water. Grey water is household wastewater from showers, sinks and kitchen. Grey water has a total 75% of the domestic wastewater volume. The research was conducted in laboratory scale. This study performed a variation of Hydraulic Loading Rate (HLR) and the influent concentration. There were 25 reactors include 5 variations of influent concentration and 5 Hydraulic Loading Rate’s (HLR) variation. The research could asses BOD5 and COD removal with treatment in UASB. Efficiency of BOD5 removal by varying the influent concentration and HLR was about 38%-75% and COD was about 40%-77%. The lower concentration could be increase efficiency BOD5 and COD removal. Influent concentration optimum occurred when middle concentration was about 840 mg/L COD and HLR optimum was 0,05 m3/m2/hour.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6136
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3133
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Effect of Clenbuterol on Growth Performance of Growing Male Pig
Sukarya Dilaga, Wayan
Cattle Science Department, Faculty of Animal Agriculture, Diponegoro University
Jl. Prof. Soedarto, SH. Kampus Tembalang, Semarang
This research was aimed to determine the response of growth performance of growing male pig fed various levels of clenbuterol. The experiment was conducted using 2 x 3 factorial completely randomized design 4 times repetition. The first factor is the type of pig (L = K = local pigs and imported pig, while the second factor is the level of clenbuterol (T0 = 0 mg / kg of feed; T1 = 0.20 mh / kg of feed and T2 = 0.40 mg / kg of feed). The were 24 male grower pigs consist of 12 local pigs and 12 imported pigs with initial body weight 28.27 kg ± 52.5. Pigs kept in individual cages for 6 weeks which is 2-week adaptation period and 4 weeks for data retrieval, with the same kind of feed consist of 27.8% bran, 55.5% and 16.7% corn concentrate. Pigs are feed 2 times a day based on their growth phase. Water was provided by ad libitum method. Variables measured were body weight gain, feed intake and feed conversion. The data obtained were analysed by range test followed by orthogonal polynomials. The results shows that clenbuterol were able to increase body weight gain, decreasing feed consumption and feed conversion. Local pig show a higher feed intake and body weight gain than imported pig, but lower feed conversion than imported pig. Statistical analysis showed no real difference for all variables.
Keywords— clenbuterol, body weight gain, feed consumption, feed conversion
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3133
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4177
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121122 2012 eng "
2302-5743
2086-5023
dc
The Effect of Chrysonilia crassa Additive on Duodenal & Caecal Morphology, Bacterial & Fungal Number, and Productivity of Ayam Kampung
Yudiarti, Turrini
Faculty of Animal Agriculture, Diponegoro University, Tembalang Campus,Semarang 50275 –Indonesia
Yunianto B.I, V. D.
Murwani, R.
Kusdiyantini, E.
Fungi is a microorganism that can live in gastrointestinal tract of chicken. One type of fungi is multicellular or filamentous fungi. C.crassa is a species of filamentous fungi that has been isolated in the earlier study and it showed the best probiotic potency in vitro. The obyective of this research was to study the effect of addition of dried culture of C.crassa in feed on intestinal & caecal morphology, bacterial & fungal number, and productivity of indigenous chicken (ayam kampung). Research used completely randomized design with four treatments. The treatments were the level of dried culture in basal diet (0%, 0.25 %, 0.50 % and 0.75 %). Each treatment was replicated 5 times and each replicate consists of 10 chickens. The parameters observed were : villi morphology, number of bacteria and fungi in the duodenum and cecum of chickens aged 1, 21 and 35 days and productivity i.e. feed intake, final body weight and feed conversion. The results showed that 0.50% dried culture of C.crassa could increase the duodenal villi width, decreased the number of bacterial and fungal colonies in duodenum and caecum, but it did not increase productivity. The conclusion : C.crassa could stimulate the duodenal villi development and decreased the number of the bacteria and fungi in the gastrointestinal tract, yet it has no positive impact on the chicken productivity.
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4177
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7695
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
The Application Modular Floating Pontoon to Support Floods Disaster Evacuation System in Heavy Populated Residential Area
Zakki, Ahmad Fauzan
Diponegoro University
Windyandari, Aulia
Array
During floods disaster in the heavy populated residential area, the lack of existing life saving appliances system such as rubber boat and wooden boat were not able to evacuate the disaster victims spontaneously in mass. The condition might be explained since the rubber boat and wooden boat have limited occupant capacity. Based on the conditions, the main objectives of the research are focused on the evaluation of the application of modular floating pontoon as multipurpose floating equipment to support floods disaster evacuation process. The investigation of the modular floating pontoon performance such as hydrostatics characteristics, the equilibrium condition and the intact stability was studied using strip theory and Krylov’s method. Furthermore, the strength analysis of the modular floating pontoon structure was calculated using finite element method. The results show that the modular floating pontoon is reliable to support the evacuation process.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7695
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4566
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130309 2013 eng "
2302-5743
2086-5023
dc
Physical Characteristics of Pressed Complete Feed for Dairy Cattle
Munasik, M.
Faculty of Animal Science University of Jenderal Soedirman Jl. Dr. Suparno Purwokerto, Central Java
Sutrisno, C. Imam
Faculty Animal Science and Agriculture University of Diponegoro
Jl. Prof. Sudarto SH No. 1 Tembalang Semarang Central Java
Anwar, Syaiful
Prayitno, Caribu Hadi
Array
The study was aimed to evaluate the physical characteristics of the pressed complete feed in the forms of cube, cylinder and ball. The study was conducted to get a complete feed of dairy cows that can be developed commercially. The evaluation was done on a physical test : bulkiness, hardness and hygroscopic properties of pressed complete feeds. The results of this research showed that the bulkiness of pressed complete feed in the forms cubes, cylinders and balls were between 0.20 up to 0.48 liter/kg; the hardness of pressed complete feed, cylinders and balls were 3 lbs up to 14 lbs; the hygroscopic factor of pressed complete feed in the forms cubes, cylinders and balls were around 1.10% up to 9.69%. The pressed complete feed in the forms of cube and cylinder are better than the form of ball in physical characteristics.
doi: 10.12777/ijse.4.2.2013.61-65
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4566
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7861
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Drying Characteristics and Product Quality of Lemon Slices Dried with Hot Air Circulation Oven and Hybrid Heatpump Dryers
Lee, Yong Hong
Universiti Tunku Abdul Rahman
Chin, Siew Kian
Universiti Tunku Abdul Rahman
Chung, Boon Kuan
Universiti Tunku Abdul Rahman
Array
In this research, drying characteristics and product quality of Coulomb-force-assisted heatpump and oven dried lemon slices were studied. Lemon slices with 3 mm thickness each, were dried using oven and Coulomb-force-assisted-heatpump dryer with and without auxiliary heater at different drying conditions. It was found that the drying rate of the lemon slices dried by all drying methods showed only falling rate states, which indicates the drying kinetics were controlled by internal moisture diffusion. Oven drying of lemon slices at 60°C showed the highest drying rate among all, followed by oven dried slices at 50°C, Coulomb-force-heater-assisted-heatpump (CF-HT-HP) dried slices at 31°C, Coulomb-force-assisted-heatpump (CF-HP) dried slices at 22°C, oven dried slices at 40°C and heatpump dried slices at 22°C. The average effective moisture diffusivity value for the slices dried with these drying methods was found in the range of 16.2 to 63.8´10-4 mm2min-1. In terms of quality assessment, CF-HP dried lemon slices retained the highest amount of Vitamin C as compared to the lemon slices dried by other drying methods. However, it retained relatively lower amount of total phenolic content (TPC) as compared to oven dried products. Among of all, CF-HP drying method produced dried lemon slices with the highest Vitamin C (6.74 mg AA / g dry weight) whereas oven dried lemon slices at 50°C preserved most of the TPC in the dried slices, which recorded as 13.76 mg GA / g dry weight.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7861
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7861/17115
https://ejournal.undip.ac.id/index.php/ijse/article/download/7861/17116
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5116
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Nitrogen Retention and Productive Performance of Crossbred Native Chicken Due to Feeding Effect of Kayambang (Salvinia molesta)
Ma'rifah, Binti
Faculty of Animal Agriculture, Diponegoro University, Tembalang Campus, Semarang
Atmomarsono, Umiyati
Faculty of Animal Agriculture, Diponegoro University Tembalang Campus, Semarang
Suthama, Nyoman
Array
The present research was aimed to clarify the effect of feeding Salvinia molesta in crossbred native chicken on productive performance based on the ability of protein utilitation. The reseach was arranged in a completely randomized design with 4 treatments and 5 replications (5 birds each). The animals used in the present study were 100 birds of crossbred native chicken. The treatments given were as follows: T0 (diet without Salvinia molesta ), T1 (diet with 6% Salvinia molesta), T2 (diet with 12% Salvinia molesta), T3 (diet with 18% Salvinia molesta). Parameter observed namely feed consumption, nitrogen retention, muscle protein mass, and body weight gain. The data were analysed using anova, when the effect of the treatments was significant, then duncan’s multiple range test was applied. The results showed that the treatment of feeding Salvinia molesta indicated a sinificant effect (p<0.05) on nitrogen retention and productive performance. Feed consumption, nitrogen retention, muscle protein mass, and the body weight gain of T1, T2, and T3 were significantly higher (p<0.05) than those of control (t0), while among treatments T1, T2, and T3 were not different. Feeding Salvinia molesta up to the level of 18% can improve nitrogen retention and productive perfomance of crossbred native chicken.
Doi: 10.12777/ijse.5.1.19-24
[How to cite this article: Ma’rifah, U. Atmomarsono, N. Suthama. (2013). Nitrogen Retention and Productive Performance of Crossbred Native Chicken Due to Feeding Effect of Kayambang (Salvinia molesta), 5(1)2013.19-24. Doi: 10.12777/ijse.5.1.19-24 ]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5116
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8681
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
The Sex Pheromone Content of The Spodoptera Exigua (Hubner) Under Artificial and Natural Diets
Mujiono, Kadis
Agricultural Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Witjaksono, Witjaksono
Agriculture Faculty of The Universitas Gadjah Mada, Bulak Sumur, Yogyakarta
Putra, Nugroho Susetya
Agriculture Faculty of The Universitas Gadjah Mada, Bulak Sumur, Yogyakarta
Array
The control of the Spodoptera exigua Hubner (Lepidoptera: noctuidae) through sex pheromones is feasible by mass trapping, mating disruption, and population monitoring. Both synthetic sex pheromones and virgin females were used on the mass trapping and population monitoring methods as attractant source. The virgin females must be available through the mass rearing without affected on its pheromone content production. Therefore, a study on the response of the female’s pheromone which reared by artificial and natural diets was important to be done. The GCMS analysis result had shown that female’s pheromone glands extract which had reareded by natural diets contained tetradecan-1-ol (0.23%) pheromone compounds and several other compounds, such as hexadecane (14.31%), heptadecane (0.42%), nonadecane (1.09%), and beta-caryophyllene (1.37%). Meanwhile, only tridecanol (3.39%), hexadecane (8.52%), nonadecane (0,23%), and trans-caryophyllene (3.11%) compounds had been found on the artificial ones. The cross-copulation test showed that both types of moths could do mating. The field trapping test showed that both extracts were attractive to males
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8681
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5175
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Weighted Local Active Pixel Pattern (WLAPP) for Face Recognition in Parallel Computation Environment
Rao, Gundavarapu Mallikarjuna
Department of Computer Science and Engineering, Gokaraju Rangaraju College of Engineering and Technology Hyderabad, India
Array
Abstract - The availability of multi-core technology resulted totally new computational era. Researchers are keen to explore available potential in state of art-machines for breaking the bearer imposed by serial computation. Face Recognition is one of the challenging applications on so ever computational environment. The main difficulty of traditional Face Recognition algorithms is lack of the scalability. In this paper Weighted Local Active Pixel Pattern (WLAPP), a new scalable Face Recognition Algorithm suitable for parallel environment is proposed. Local Active Pixel Pattern (LAPP) is found to be simple and computational inexpensive compare to Local Binary Patterns (LBP). WLAPP is developed based on concept of LAPP. The experimentation is performed on FG-Net Aging Database with deliberately introduced 20% distortion and the results are encouraging.
Keywords — Active pixels, Face Recognition, Local Binary Pattern (LBP), Local Active Pixel Pattern (LAPP), Pattern computing, parallel workers, template, weight computation.
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5175
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6099
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
dc
THE ANALYSIS, IDENTIFICATION, AND FORMULATION OF METALLOTHIONEIN EXTRACT AVAILABLE IN ROOTS, STEMS, LEAVES , FLOWERS , AND GRAINS OF RICE, CORNS, BEANS , AND SOYBEANS
Santosa, Budi
Department of Health Analyst, Faculty of Health Science, University of Muhammadiyah Semarang http://fikkes.unimus.ac.id/index.php?lang=1
Sunoko, Henna Rya
S, Andri
Array
Abstract –Vegetable materials are easily found around us but are frequently considered useless. The Metallothionein content in vegetable materials such in roots, stems, leaves, flowers, and fruit of rice, corns, beans, and soybeans has not been investigated before. Metallothionein protein has the role to bind heavy metals and serves as means of detoxification of heavy metals. This studi investigated to analyze, identify, and formulate metallothionein extracts from vegetable materials such as in roots, stems, leaves, flowers, and fruit of rice, corns, beans, and soybeans.
The Experimental, each vegetable material available in roots, stems, leaves, flowers and fruit of rice, corns, beans, and soybeans was made into simplisia (crude medication) and then was processed into infuse. ELISA method was conducted as the measurement techniques upon protein level of each vegetable material infuse. The levels of Metallothionein protein available in vegetable materials were identified to determine the highest. The extract formula was taken from the highest levels of metallothionein.
The result showed that the average metallothionein protein level from the entire vegetable materials was 0.62 ng: the highest in rice leaves of 1.4 ng and the lowest in bean flowers of 0.2 ng. The rice leaves were further formulated into metallothionein Extract.
The analysis of metallothionein levels of vegetable materials such as in roots, stems, leaves, flowers, and fruit of rice, corns, beans and soybeans found that the highest level was in rice leaves of 1.354539 ng, and the lowest was in bean flowers of 0.22478.
Key Words - Vegetable, metallothionein..
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6099
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6099/13158
https://ejournal.undip.ac.id/index.php/ijse/article/download/6099/14855
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5659
2013-11-03T22:28:15Z
ijse:EDT
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Editorial (Table of Content, Editorial Board, Preface)
Editor, IJSE
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Editorial (Table of Content, Editorial Board, Preface)
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5659
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1237
2012-02-12T01:38:24Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
CO2 Removal from Biogas Using Carbon Nanotubes Mixed Matrix Membranes
Kusworo, Tutuk Djoko
Department of Chemical Engineering,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
Ismail, Ahmad Fauzi
Advanced Membrane Research Technology Center,
Faculty of Chemical and Natural Resources Engineering,
Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor Bahru, Malaysia
Budiyono, ,
Department of Chemical Engineering,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
Widiasa, I Nyoman
Department of Chemical Engineering,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
Johari, Seno
Faculty of Animal Agriculture,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
Sunarso, ,
Faculty of Animal Agriculture,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
A new type of mixed matrix membrane consisting of polyethersulfone (PES) and carbon nanotubes (CNTs) is prepared for biogas purification application. PES mixed matrix membrane with and without modification of carbon nanotubes were prepared by a dry/wet phase inversion technique using a pneumatically membrane casting machine system. The modified carbon nanotubes were prepared by treating the carbon nanotubes with chemical modification using acid treatment to allow PES chains to be grafted on carbon nanotubes surface. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Meanwhile, the nanogaps in the interface of polymer and carbon nanotubes were appeared in the PES mixed matrix membrane with unmodified of carbon nanotubes. The modified carbon nanotubes mixed matrix membrane increases the mechanical properties and the permeability of all gases. For PES-modified carbon nanotubes mixed matrix membrane the maximum selectivity achieved for CO2/CH4 is 23.54
Chemical Engineering Diponegoro University
2010-07-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1237
International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21815
2019-04-23T22:04:33Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
UTILIZATION OF GENCIL MOBILE APPLICATION IN IMPLEMENTING SMART CITY IN PONTIANAK
Jannah, Hidana Nur
Universitas Gadjah Mada
Array
Gencil is a mobile application developed in Pontianak to support the implementation of smart city. The aims of this study are; 1)describing the Gencil mobile application, 2)identifying the utilization of Gencil mobile application, 3)identifying the constraining factors in the development of Gencil mobile application in Pontianak. Primary data was obtained through in-depth interviews and questionnaires. The results show that Gencil mobile application consists of six features. The food price feature becomes the most popular one. Constraining factors for the development of Gencil mobile application are the lack of community participation and the inadequate infrastructure for the application’s development
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/21815
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/6800
2014-05-01T20:17:44Z
ijse:EDT
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Editorial (Table of Content, Editorial Board, Preface, Aim and Scope)
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Editorial (Table of Content, Editorial Board, Preface, Aim and Scope
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6800
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1265
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
An Overview of Biocement Production from Microalgae
Ariyanti, Dessy
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Abyor Handayani, Noer
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Hadiyanto, Hadi
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
The invention of microorganism’s involvement in carbonate precipitation, has lead the exploration of this process in the field of construction engineering. Biocement is a product innovation from developing bioprocess technology called biocementation. Biocement refers to CaCO3 deposit that formed due to microorganism activity in the system rich of calcium ion. The primary role of microorganism in carbonate precipitation is mainly due to their ability to create an alkaline environment (high pH and DIC increase) through their various physiological activities. Three main groups of microorganism that can induce the carbonate precipitation: (i) photosynthetic microorganism such as cyanobacteria and microalgae; (ii) sulphate reducing bacteria; and (iii) some species of microorganism involved in nitrogen cycle. Microalgae are photosynthetic microorganism and utilize urea using urease or urea amidolyase enzyme, based on that it is possible to use microalgae as media to produce biocement through biocementation. This paper overviews biocement in general, biocementation, type of microorganism and their pathways in inducing carbonate precipitation and the prospect of microalgae to be used in biocement production.
Keywords— Biocement, Biocementation, Microalgae, CaCO3 precipitation
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1265
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6795
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Distribution of Mean Annual Percipitable Water in Nigeria
Udo, Iniobong Anthony
Department of Physics, Faculty of Science University of Port Harcourt
Okujagu, Charity U.
Department of Physics, Faculty of Science University of Port Harcourt
Array
Mean monthly precipitable water values from twenty seven state capitals and Federal Capital Territory, Abuja are determined using a ten year monthly meteorological parameter- average surface temperature. The results are then presented on annual average precipitable water map. The map shows that location with high topography has lowest value of precipitable water while location with plain terrain has highest value of precipitable water
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6795
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3009
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Characteristic of Heat Pump Dehumidifier Drier in the Drying of Red Chili (Capsium annum L)
Marnoto, Tjukup
Sulistyowati, Endang
Mahreni, Mahreni
Syahri, M.
Preservation of agricultural products have a very important to avoid the dropped of selling price when the harvest season arrives. Agricultural products are perishable because of high water content approximately 80 % which if the moisture content above 10% encourages proliferation of spoilage microorganisms in the material and cause the short shelf life. One way that has been done to preserve agricultural products such as red chili is dried using direct sunlight. Weakness of the sun drying can not reduce the water content to below 10% so spoilage microorganisms can live and breed, cause the short self life. Drying using Heat Pump Humidification Technology (HPD) is one solution to overcome the disadvantages of the direct sun drying. HPD can reduce the moisture content up to or below 10% will increase the self life and make easier to crush and to produce a chili powder. The purpose of this study to determine the appropriate mathematical model of the drying phenomena. The constant of the model equations are determined by Sum Square Error (SSE). Before being dried chilies dipped in hot water to remove the wax. PHD is used as an air dehumidifier that circulate in the dryer. Humidity difference causes the displacement of water from the chilies to dry air and lower the moisture content of chili. Moisture content of chili every 5 minutes is analyzed using gravimetric method. The results showed that the texture of the chili is very fragile with a moisture content of less than 10% and in the best conditions, the moisture content of chili is 6:35 wt%. From the research found that the appropriate model is Lewis model and the constant of the models obtained (k = 0.0056). Due to the moisture content of the product below 10 wt%, PHD can be considered as an agricultural product dryer.
Keywords — Chili, drying, heat pump, hpd
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3009
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6614
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Adsorption Desorption of Chromium (III) Ion on Cellulose from Wood Powder
Mohadi, Risfidian
Department of Chemistry, FMIPA, Sriwijaya University
Hidayati, Nurlisa
Department of Chemistry, FMIPA, Sriwijaya University
Lesbani, Aldes
Department of Chemistry, FMIPA, Sriwijaya University
Array
This study of adsorption desorption of chromium ion on cellulose from wood powder has been carried out systematically and also wood powder was used as adsorbent control in this research. Adsorption process was studied through investigation of adsorption time and variation of chromium ion in the adsorption. Desorption process was investigated using several desorption reagents such as hydrochloric acid, ammonium acetate, sodium EDTA, and water. Data of adsorption time of chromium ion on cellulose and wood powder was calculated to obtain adsorption rate constant of chromium ion. Then the data of variation concentration of chromium was formulated to obtain adsorption capacity of chromium ion on cellulose and wood powder. The results showed that adsorption rate constant of chromium on cellulose is 0.007 min-1 and 0.002 min-1 for wood powder. Adsorption capacity of chromium ion on cellulose is higher than on wood powder while 76.92 mol/g for cellulose and 55.56 mol/g for wood powder. The results of desorption using various desorption shows sodium EDTA is appropriate reagent for desorption of chromium ion on both cellulose and wood powder.
Keywords - adsorption, cellulose, chromium, desorption.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6614
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6614/14102
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7692
2014-10-23T15:51:29Z
ijse:EDT
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Front Cover
support, Editor
Front Cover
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7692
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4298
2012-12-31T10:52:16Z
ijse:ART
nmb a2200000Iu 4500
"121231 2012 eng "
2302-5743
2086-5023
dc
Manufacturing of Electrolyte and Cathode Layers SOFC Using Atmospheric Spraying Method and Its Characterization
Sulistyo, S.
Faculty of Mechanical and Manufacturing Engineering, UTHM, 86400 Batu Pahat, Johor
Ariffin, S.
Mahzan, S.
The use of Solid Oxide Fuel Cell (SOFC) has created various interest in many parties, due to its capability to convert gases into electricity. The main requirement of SOFC cell components is to be produced as thin as possible to minimize the losses of electrical resistance, as well as able to support internal and external loads. This paper discusses the procedure of making a thin electrolyte layer, as well as a porous thin layer cathode using atmospheric spraying technique. The procedure of spraying was in room temperature with the process of sintering at temperature of 13500 C held for 3 hours. The SOFC characterization of electrolyte and cathode microstructure was determined by using the SEM, FESEM, XRD and impedance spectroscopy, to measure the impedance of SOFC cells. The results show that the thickness of thin layer electrolyte and porous cathode obtained of about 20 µm and 4 µm, respectively. Also the SOFC cell impedance was measured of 2.3726 x 106 Ω at room temperature. The finding also demonstrated that although the materials (anode, cathode and electrolyte) possess different coefficient thermal expansion, there was no evidence of flaking layers which seen the materials remain intact. Thus, the atmospheric spraying method can offer an alternative method to manufacturing of SOFC thin layer electrolyte and cathode.
[Key words: SOFC; spraying method; electrolyte; cathode]
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4298
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8041
2015-01-12T20:22:30Z
ijse:EDT
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Aims and Scopes, Editorial Boards, Preface, Table of Contents
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Aims and Scopes, Editorial Boards, Prefce, Table of Contents
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8041
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5052
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Distribution of Coral Reef and Seagrass Ecosystems’s Inorganic Carbon in the Waters of Beras Basah Bontang, East Kalimantan
Ritonga, Irwan Ramadhan
Marine Sciense Department of Fisheries and Marine Science Faculty, Mulawarman University
Kampus Gn. Kelua Jl.Gunung Tabur Tlp.(0541)749482 Samarinda
Supriharyono, S.
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang
Hendrarto, Boedi
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang
Array
Inorganic carbon is closely related to the calcification process (CaCO3), which is the main constituent of coral reefs or microorganisms that exist in the oceans such as foraminifera and cocolitoporit. Inorganic carbon is also closely linked to the chemical processes that occur when carbon dioxide gas (CO2) dissolved in water. The research of inorganic carbon in the waters of Beras Basah was carried out in January, February and March 2012. The purpose of this study was to understand the distribution and concentration of total inorganic carbon (CT) in coral reef and seagrass ecosystems as well as the correlation of Beras Basah. The results showed that the concentration of total inorganic carbon (CT) in January average 1166.503 μmol/kgSW, February average 1115.599 μmol/kgSW, and then in March the average 987.443 μmol/kgSW. Distribution patterns of total inorganic carbon (CT) is vectoral, where in January, the concentration of total inorganic carbon (CT) was highest in the Southeast region, was in February in the South and Southeast, while in March shifted to North region of Beras Basah Island. The concentration difference is thought to be influenced by pH and the seasons, tides, biochemical processes, and biological activity.
Doi: 10.12777/ijse.5.1.1-5
[How to cite this article: Ritonga, I.R., Supriharyono, and Henderarto, B. (2013). Distribution of Coral Reef and Seagrass Ecosystems’s Inorganic Carbon in the Waters of Beras Basah Bontang, East Kalimantan. International Journal of Science and Engineering, 5(1),1-6. Doi: 10.12777/ijse.5.1.1-5]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5052
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8488
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
The Impact of Land Use on Hydrological Characteristics in Kaligarang Watershed
Budiyanto, Susilo
Agriculture Department, Faculty of Animal and Agriculture Science, Diponegoro University
Tarigan, S.D.
Soil Science and Land Resources Department, Faculty of Agriculture, Bogor Agricultural University, Bogor
Sinukaban, N.
Soil Science and Land Resources Department, Faculty of Agriculture, Bogor Agricultural University, Bogor
Murtilaksono, K.
Soil Science and Land Resources Department, Faculty of Agriculture, Bogor Agricultural University, Bogor
Array
The increasing number of population in Kaligarang watershed will cause population pressure that will have a direct impact on land-use change and in turn will have an impact on watershed hydrological characteristics. Watershed management planning as an integral part of land-use and conservation based development is very important and need to be applied. The aims of this research were to analyze land-use changes in Kaligarang watershed, and the impact of land-use changes on watershed hydrological characteristics in Kaligarang. The results of this research showed that in Kaligarang watershed, there was a decrease in forest area of 2.28% and rice field of 13.96%, an increase in resident area of 2.14%, dry land farming of 5.82% and mixed dry land farming of 10.03%. The decreasing forest area caused an increase in runoff coefficien (CRO= 147.5 – 7.06F), an increase in average daily maximum discharge (Qmax(cms) = 79.33 – 4.23 F) and a decrease in baseflow (BF (cms) = -1.65 + 0.36 F)
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8488
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5471
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"130916 2013 eng "
2302-5743
2086-5023
dc
Zinc Supplementation Dosage Variations to Metallothionein Protein Level of Rattus Norvegicus
Santosa, Budi
Faculty of Nursing and Health
Muhammadiyah University, Semarang http://fikkes.unimus.ac.id/index.php?lang=1
Wahyu Subagyo, Hertanto
S, Lisyani
Rya Sunoko, Henna
Array
Zinc is an essential trace element involving in the activity of more than 300 enzymes and proteins of human body. One important role of zinc is to improve metallothionein protein binding heavy metals and functioning as heavy metal detoxification facilities. This research discusses the effect of zinc supplement on the improvement of metallothionein protein level. The in vivo test involving 28 rats categorized in 4 groups was performed. The experiments used randomized post test control group design. The 3 groups were daily supplemented by zinc in th concentration of 0.2 mg, 0.4 mg, and 0.8 mg. Whereas, the last group was let without zinc treatment. As an indicator the metallothionein protein level was checked after three weeks. The data was then evaluated by Anova an Bonferroni test in order to know the signicant of protein level difference among the groups.
The result showed that the average of metallothionein protein level improved by increasing zinc suppplement with the 0.95 ±0.20; 1.28 ±0.19; 1.39 ±0.09; 1.91 ±0.3 ng/ml metallothionein per 0, 0,2, 0,4, 0,8.mg zinc added. Based on the ANOVA and Bonferroni test, indicated that the improvement was significant as shown with p value of 0.00
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5471
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5604
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Agarwood Waste as A New Fluid Loss Control Agent in Water-based Drilling Fluid
Azizi, Azlinda
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Ibrahim, Mohd Shahrul Nizam
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Hamid, Ku Halim Ku
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Sauki, Arina
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Ghazali, Nurul Aimi
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Mohd, Tengku Amran Tengku
Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor
Array
Agarwood has been used widely in various ways, including traditional medicine and art. The usage of agarwood has grown broader in modern times include in therapeutic medicines and perfumery. In this paper the agarwood waste has been explored to be used as a fluid loss control agent to control fluid loss without affecting the drilling fluid rheological properties which are density, pH, viscosity, yield point and gel strength. Agarwood waste was used as an additive in the drilling fluid system due to its unique characteristic. Rheological and filtration measurements were performed on the formulated water-based drilling fluid. Formulations of a base solution of fresh water, sodium hydroxide, bentonite, barite, and xanthan gum were presented. The performance of the agarwood waste as the fluid loss control agent was compared with based fluid formulation and water-based drilling fluid with treating with conventional fluid loss control agent (starch). The filtrate volume of drilling fluid with agarwood waste was about 13 ml while for drilling fluid with conventional fluid loss control agent, starch gave 12 ml of filtrate volume after undergoing filtration test by using LPLT filter press. The performance of drilling fluid with agarwood was efficient as drilling fluid with starch.
Doi: 10.12777/ijse.5.2.101-105
How to cite this article: Azizi, A., Ibrahim, M.S.N., Hamid, K.H.K., Sauki, A., Ghazali, N.A., Mohd, T.A.T. (2013). Agarwood Waste as A New Fluid Loss Control Agent in Water-based Drilling Fluid. International Journal of Science and Engineering, 5(2),101-105. Doi: 10.12777/ijse.5.2.101-105]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5604
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1230
2012-09-27T14:35:21Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Biogas Production Using Anaerobic Biodigester from Cassava Starch Effluent
Sunarso, S.
Department of Animal Agriculture, Diponegoro University Jalan Prof. Sudharto, Tembalang, Semarang, Indonesia
Budiyono, B.
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University Jalan Prof. Sudharto, Tembalang, Semarang, Indonesia
Sumardiono, Siswo
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University Jalan Prof. Sudharto, Tembalang, Semarang, Indonesia
IKMs’ factory activity in Margoyoso produces liquid and solid wastes. The possible alternative was to use the liquid effluent as biogas raw material. This study focuses on the used of urea, ruminant, yeast, microalgae, the treatment of gelled and ungelled feed for biogas production, pH control during biogas production using buffer Na2CO3, and feeding management in the semi-continuous process of biogas production that perform at ambient temperature for 30 days. Ruminant bacteria, yeast, urea, and microalgae was added 10% (v/v), 0.08% (w/v), 0.04% (w/v), 50% (v/v) of mixing solution volume, respectively. The pH of slurry was adjusted with range 6.8-7.2 and was measured daily and corrected when necessary with Na2CO3. The total biogas production was measured daily by the water displacement technique. Biogas production from the ungelling and gelling mixture of cassava starch effluent, yeast, ruminant bacteria, and urea were 726.43 ml/g total solid and 198 ml/g total solid. Biogas production from ungelling mixture without yeast was 58.6 ml/g total solid. Biogas production from ungelling mixture added by microalgae without yeast was 58.72 ml/g total solid and that with yeast was 189 ml/g total solid. Biogas production from ungelling mixture of cassava starch effluent, yeast, ruminant bacteria, and urea in semi-continuous process was 581.15 ml/g total solid. Adding of microalgae as nitrogen source did not give significant effect to biogas production. But adding of yeast as substrate activator was very helpful to accelerate biogas production. The biogas production increased after cassava starch effluent and yeast was added. Requirement of sodium carbonate (Na2CO3) to increase alkalinity or buffering capacity of fermenting solution depends on pH-value
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1230
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/12196
2018-01-17T08:30:49Z
ijse:ART
nmb a2200000Iu 4500
"160415 2016 eng "
2302-5743
2086-5023
dc
Measurement of cement’s particle size distribution by the buoyancy weighing-bar method
Tambun, Rondang
Department of Chemical Engineering, Faculty of Engineering, University of Sumatera Utara
Pratama, Nofriko
Department of Chemical Engineering, Faculty of Engineering, University of Sumatera Utara
Hanum, Farida
Department of Chemical Engineering, Faculty of Engineering, University of Sumatera Utara
Array
One of the important characteristics of cement quality is particle size distribution. There are several simple methods to measure the particle size distribution of cement based on the Stokes diameter, like Andreasen pipette method, sedimentation balance method, centrifugal sedimentation method, etc. A major disadvantages of these methods are they are time consuming process and require special skills. Particle size distribution also can be analyzed by using a different principle through microscopy, laser diffraction/scattering methods and Coulter counter method. Even these methods produce highly accurate results within a shorter time, however, the equipments are expensive. In the present study, it has developed a new method to overcome the problem. The method is the buoyancy weighing-bar method. This method is a simple and cost-effective. The principle of the buoyancy weighing-bar method that the density change in a suspension due to particle migration is measured by weighing buoyancy against a weighing–bar hung in the suspension, and the particle size distribution is calculated using the length of the weighing-bar and the time–course change in the the apparent mass of the weighing–bar. This apparatus consists of an analytical balance with a hook for underfloor weighing, and a weighing–bar, which is used to detect the density change in suspension. The result obtained show that the buoyancy weighing–bar method is suitable for measuring the particle size distribution of cement, and the result is comparable to that of determined by settling balance method.
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/12196
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6026
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
The Effects of Dietary Neutral Detergent Fiber Ratio from Forage and Concentrate on The Dietary Rumen Degradability and Growth Performance of Philippine Native Goats (Capra hircus Linn.)
Nugroho, Dwiatmoko
Master Program of Animal Science, Faculty of Animal Science and Agriculture, Diponegoro University
Sunarso, Sunarso
Master program in Animal Science, Faculty of Animal Science and Agriculture, Diponegorgo University
Sevilla, Cesar C.
Animal Science and Dairy Cluster, University of the Philippine Los Baños
Angeles, Amado A.
Animal Science and Dairy Cluster, University of the Philippine Los Baños
Array
This research’s objective was to determine the dietary rumen degradability and growth performances of goats fed dietary treatments. 18 native female goats (live weight of 7.96 ± 2.21 kg) were grouped into 6 classes for the feeding trial and 3 male mature goats with rumen cannula were used for the in situ digestibility. The three dietary treatments were: T1 - 72:28 Forage-Concentrate NDF ratio; T2 - 64:36; and T3 - 57:43. The rate of rumen degradability of DM and CP at 0 hours, potentially degradable fraction (b) and the rate of degradation of b were not affected by dietary treatments. The different ratios of NDF in the diets significantly affected the intake of DM, CP and NDF from forage and concentrates. Treatment diets affected the total intake of DM, CP and NDF of the animals. However, growth performance was not affected by the treatments showing the same production efficiency. This means that diets given to native goats with ratio of forage NDF of 72.07% can be applied since the value of the output and efficiency of feed utilization had the same value compared to diets ratio of forage NDF of 57.21%.
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6026
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1255
2011-12-26T06:52:12Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Instruction for Authors
MSi, Budiyono
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Manuscripts are to be submitted in their final form. Papers must be written in English, and authors are urged to aim for clarity, brevity, and accuracy of information and language. Authors whose first language is not English should have their papers checked for linguistic accuracy by a native English speaker. Submitted manuscripts should conform to the IEEE format stated by Editor. Registration and login are required to submit items online and to check the status of current submissions. Manuscript must be submitted via Online Submissions, obey Author Guidelines, and Privacy Statement. Already have a Username/Password for International Journal of Science and Engineering (IJSE)? Go to Login. Need a Username/Password?
Go to Registration.
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
application/msword
https://ejournal.undip.ac.id/index.php/ijse/article/view/1255
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6732
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
The Stock Potency of Demersal Fish Resource at The Coastal Zone, East Kutai District in East Kalimantan
Juliani, Juliani
Fishery and Marine Science Faculty, Mulawarman University, Jl. Krayan Kampus Gunung Kelua Samarinda
Suyatna, Iwan
Fishery and Marine Science Faculty, Mulawarman University, Jl. Krayan Kampus Gunung Kelua Samarinda
Array
The objective of this research was to estimate the potency of demersal fish resource spread over three sub-districts i.e. Sangkulirang, Sandaran and Kaliorang in Kutai district, East Kalimantan province. The result showed that the highest total biomass was produced by aquatic zone of Sandaran sub-district with 1,763,713.6 ton/zone and the density stock was 13,566.5 kg/km2. It was followed by Sangkulirang sub-district with 264,653.3 ton/zone and 6,640.4 kg/km2, respectively and then by Kaliorang sub-district with 58.086,5 ton/zone and 2,768.0 kg/km2, respectively. In term of species particularly from crustaseaae family, the most economic aquatic zone was found in Sangkulirang sub-district. The export product species Penaeus sp was obtained from Penaeus monodon, Metapenaeus monoceros, Metapenaeus sp, Parapenaeopsis sculptilis, Penaeus sp, and lobster which was accounted by 3,381.6 tons/zone, 83,199 tons/zone, 14,492.7 tons/zone, 24,691.3 tons/zone, 41,331.1 tons/zone, and 1,073.5 tons/zone, respectively. It was followed by Sandaran sub-district with export product species was Penaeus merguensis 33,495.7 tons/zone and non-export products were Parapenaeopsis sculptilis 63,641.7 tons/zone, Penaeus sp 16,747.8 tons/zone, Metapenaeus sp 1.674,8 tons/zone, Caridina sp 1.562.572,2 tons/zone, and Scylla serrata 3,349.6 tons/zone. Next was Kaliorang sub-district which accounted by Penaeus merguensis 62.2 tons/zone and Metapenaeus monoceros 49.7 tons/zone. In situ measurement on seven physical-chemical quality parameters of water which compared to the standardized of sea water showed that water quality found in coastal zone of Kaliorang, Sangkulirang and Sandaran sub-district, East Kutai province was suitable and feasible for the aquatic and living of marine habitats
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6732
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1291
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Fast Local Binary Patterns for Efficient Face Recognition
Rao G, Mallikarjuna
Department of Computer Science and Engineering, Gokaraju Rangaraju College of Engineering and Technology
Hyderabad
Kumari G, Vijaya
G R, Babu
Viswanadula, Rajesh
Department of Computer Science and Engineering, Gokaraju Rangaraju College of Engineering and Technology
Hyderabad
LBP, Local Binary Patterns, is an accepted technique for efficient face recognition. The local features improve the recognition process. However, high memory and computational resources are needed for LBP required approaches to improve the performance. Many people used LBP for extracting features and Support Vector Machine (SVM), histogram matching, neural networks as recognition tools. These approaches consume considerable computational resources. We have proposed a fast LBP which uses Two-level Correlation for the classification & recognition. The exhaustive experiments on FERET database 8750 images substantiate the performance compared to others.
[Keywords— Face Recognition, LBP, Histogram Matching, Two-level Correlation, FERET data set]
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1291
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6994
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Immobilized bacteria by using PVA (Polyvinyl alcohol) crosslinked with Sodium sulfate
Pham, Dinh Van
National University of civil engineering
Tho Bach, Leu
National University of Civil Engineering
Array
A new bacteria immobilization technique using PVA (polyvinyl alcohol) crosslink with sodium sulfate was developed. This new technique can simultaneously eliminate the agglomeration of PVA beads and the toxicity of boric acid caused by the PVA-boric methods, also reducing the swelling (when soaking in water) of PVA-boric methods. Beads were immobilized by using four different PVA immobilization processes to create group B, group N, group P and group S. The stability, swelling, relative mechanical strength of these kinds of beads were compared in this study. Only group S was the best and chosen to do experiment for checking survival of bacteria after immobilization process and TOC removal performance of anaerobic reactor. The TOC removal performance of anaerobic reactor achieved 80-87%.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6994
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4057
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121013 2012 eng "
2302-5743
2086-5023
dc
Forecasting Volatility of Dhaka Stock Exchange: Linear Vs Non-linear models
Islam, Masudul
Statistics Discipline, Khulna University, Khulna-9208
Ali, Lasker Ershad
Statistics Discipline, Khulna University, Khulna-9208
Afroz, Nahida
Statistics Department, Mawlana Bhashani Science and Technology University, Santosh, Tangail-9102
Prior information about a financial market is very essential for investor to invest money on parches share from the stock market which can strengthen the economy. The study examines the relative ability of various models to forecast daily stock indexes future volatility. The forecasting models that employed from simple to relatively complex ARCH-class models. It is found that among linear models of stock indexes volatility, the moving average model ranks first using root mean square error, mean absolute percent error, Theil-U and Linex loss function criteria. We also examine five nonlinear models. These models are ARCH, GARCH, EGARCH, TGARCH and restricted GARCH models. We find that nonlinear models failed to dominate linear models utilizing different error measurement criteria and moving average model appears to be the best. Then we forecast the next two months future stock index price volatility by the best (moving average) model.
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4057
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6958
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
GROWTH PERFORMANCE AND MINERAL STATUS ON GOATS (Capra hircus Linn.) SUPPLEMENTED WITH ZINC PROTEINATE AND SELENIUM YEAST
Aditia, Maharani
Faculty of Animal Science and Agriculture, Diponegoro University, Semarang
Sunarso, Sunarso
Faculty of Animal Science and Agriculture, Diponegoro University, Semarang
Sevilla, C.C.
Animal Science and Dairy Cluster, University of the Philippine Los Baños - Philipine
Angeles, A.A.
Animal Science and Dairy Cluster, University of the Philippine Los Baños - Philipine
Array
Twenty two (22) doelings weighing 7.86 ± 2.12 kg were grouped into 6 weight classes in a feeding trial to determine the effects of dietary zinc proteinate and selenium yeast on mineral status and growth performance. The Zn-supplemented groups received 200 mg additional Zn daily from chelated Zn proteinate, an insoluble powder containing 15% elemental Zn. Se-supplemented groups received 3 mg Se from Se yeast consisting mainly of selenomethionine (63%). The four (4) dietary treatments were as follows: T1 : 0 mg Zn + 0 mg Se; T2: 0 mg Zn + 3 mg Se; T3 : 200 mg Zn + 0 mg Se. T4: 200 mg Zn/head + 3 mg Se/head. The experiment was conducted in a 2 x 2 factorial design in RCBD. Napier grass used in the trial contained 89.03 ppm Zn, while the mixture of corn-soybean oil meal had Zn content 49.73 ppm. Supplementation of Zn and Se in the diets composed of 60% Napier and 40% soya-corn mix had no effect on dry matter intake, body weight gain, and feed efficiency. Giving 200 mg Zn/head tends to increase (P<0.05) the Zn concentration in the blood of doelings among the levels of Se. Percent digestibility of Zn decreased with Zn supplementation at 200 mg. Percent apparent digestibility of Zn tends to be higher in animals without mineral supplementation. Results indicate that Zn and Se supplementation did not affect growth performance. Zn supplementation increased blood Zn concentration, but did not affect digestibility of Zn.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6958
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6958/14841
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4261
2012-12-31T07:26:51Z
ijse:ART
nmb a2200000Iu 4500
"121211 2012 eng "
2302-5743
2086-5023
dc
Diethyl Ether Production Process with Various Catalyst Type
Widayat, Widayat
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Roesyadi, Achmad
Rachimoellah, Muhammad
Several H-zeolite and HZSM-5 catalysts was preparated and their characters have also been investigated. H-zeolit Catalyst was preparated from Natural Zeolite that obtained from Malang District and Gunung Kidul District. Diethyl ether was produced by Ethanol with concentration of 95%. This research use fixed bed reactor that 1 gram of catalyst as bed catalyst, atmospheric pressure and temperature 140oC as the operating condition. Ethanol vapor from vaporization tank was driven by 200 ml/min Nitrogen stream. The responds in this research is liquid product concentration; diethyl ether, ethanol, methanol and water concentration. The results showed that the largest ethanol conversion was produced by the use of 56.44% HZSM-5 and the largest yield of diethyl ether diethyl was produced by the use of alumina and H-zeolite catalyst. The larger ratio between natural zeolite with HCl solvent will produce the larger surface area of catalyst and ethanol conversion. The largest ethanol conversion was produced at reactan ratio 1:20.
[Keywords: catalyst; ethanol conversion; dehydration process; yield of diethyl ether; natural zeolite].
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4261
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7919
2015-01-12T20:25:05Z
ijse:EDT
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Front Cover
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Front Cover
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7919
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4741
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130416 2013 eng "
2302-5743
2086-5023
dc
The use of geomatic techniques to monitor environmental deformation
Al Rawashdeh, Samih
Dept. of Surveying and Geomatics Engrg., Fac. of Engrg., Al-Balqa’ Applied University, Al-Salt 19117
E. Al Ruzouq, Rami
S. Qtaishat, Khaldoun
Array
Geospatial deformations are very important in some countries and may lead to catastrophes. For this purpose we need to find practical accurate ways to provide continuous monitoring and measurement to allow protection and secure safety. Some countries are suffering great losses such as Jordan where the major high way that connects the north to the middle of the country is closed most of the winter due to landslides that push the road away. In this work we are employing new Geomatics technique to analyze, monitor and measure the landslides. An application of geodetic monitoring of a major landslide on the highway linked Amman to the north (Jerash, Irbid). For the purpose of monitoring the landslide we designed a geodetic network, which consists of 4 points. Measurements were carried out over the period 2007 to 2012 (before and after rainy season) of 12 points within the network. The obtained results are compared to results published previously using different techniques of measurement over the two years period (2002-2004). In the new methodology, GPS receivers and total stations of high precision were used in addition to an orthophoto of two aerial photographs. The observations adjustment and the deformation analysis were executed using locally developed computer programs. The study enabled us to determine a value of 0.26 m/year as an average displacement of the landslide-prone area for the period of 2007-2012.
Doi: 10.12777/ijse.4.2.2013.92-96
[How to cite this article: Rawashdeh, S., Ruzouq, R.E., and Qtaishat, K.S.. (2013). The use of geomatic techniques to monitor environmental deformation. International Journal of Science and Engineering, 4(2),92-96. Doi: 10.12777/ijse.4.2.2013.92-96]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4741
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8319
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Heat and mass transfer effects on an unsteady mhd flow of a rotating fluid past a vertical porous plate
Murali, G
Department of Applied science, Pune Institute of Computer Technology
Reddy, E.M.
Department of Applied science, Pune Institute of Computer Technology
Venkata N. B, Narepalepu
Department of Mathematics,SHIATS University, Allahabad
Array
An attempt is made to investigate the heat and mass transfer effects on an unsteady free convection flow of a rotating, incompressible, viscous Boussinesq fluid in presence of first order chemical reaction. The governing dimensionless equations for this investigation are solved numerically by a finite element method. A parametric study illustrating the influence of different flow parameters on velocity, concentration and temperature are investigated. Also the Skin – friction, Nusselt number and Schmidt number are shown through tabular forms. Numerical results are presented for various parameters.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8319
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5138
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
An Enhanced Feedback-Base Downlink Packet Scheduling Algorithm for Mobile TV in WIMAX Networks
Oyewale, Joseph
Department of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Prov. China
Xiao Juan, Liu
Department of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu Prov.
Array
With high speed access network technology like WIMAX, there is the need for efficient management of radio resources where the throughput and Qos requirements for Multicasting Broadcasting Services (MBS) for example TV are to be met. An enhanced feedback-base downlink Packet scheduling algorithm that can be used in IEEE 802.16d/e networks for mobile TV “one way traffic”(MBS) is needed to support many users utilizing multiuser diversity of the broadband of WIMAX systems where a group of users(good/worst channels) share allocated resources (bandwidth). This paper proposes a WIMAX framework feedback-base (like a channel-awareness) downlink packet scheduling algorithm for Mobile TV traffics in IEEE806.16, in which network Physical Timing Slots (PSs) resource blocks are allocated in a dynamic way to mobile TV subscribers based on the Channel State information (CSI) feedback, and then considering users with worst channels with the aim of improving system throughput while system coverage is being guaranteed. The algorithm was examined by changing the PSs bandwidth allocation of the users and different number of users of a cell. Simulation results show our proposed algorithm performed better than other algorithms (blind algorithms) in terms of improvement in system throughput performance.
Doi: 10.12777/ijse.5.1.55-62
[How to cite this article: Oyewale, J. and , Juan, L.X.. (2013). An Enhanced Feedback-Base Downlink Packet Scheduling Algorithm for Mobile TV in WIMAX Networks. International Journal of Science and Engineering, 5(1),55-62. Doi: 10.12777/ijse.5.1.55-62]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5138
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8680
2015-11-20T09:43:11Z
ijse:ART
nmb a2200000Iu 4500
"150715 2015 eng "
2302-5743
2086-5023
dc
Non Oblivious Watermarking Technique for JPEG2000 Compressed images using Arnold Scrambling of Unequal Size Watermark Blocks
Kasana, Geeta
Computer Science and Engineering Department
Thapar University
Patiala
Singh, Kulbir
Associate Professor
Electronics and Communication Engineering Department
Thapar University
Patiala
Bhatia, Satvinder Singh
Professor
School of Mathematics
Thapar University
Patiala
Array
In this paper, a watermarking technique for JPEG2000 compressed image is proposed. Scrambling of secret message is performed block-wise using Arnold Transform. Secret message is divided into non-overlapping blocks of unequal size and then Arnold transform is applied on each block and secret key is generated based on the periodicity of each block. Scrambled secret message is embedded into qualified significant wavelet coefficients of a cover image. After embedding the secret message into wavelet coefficients, the remaining processes of JPEG2000 standard are executed to compress the watermarked image at different compression rates. Scaling Factor (SF) is used to embed watermark into wavelet coefficients and the value of SF is stored into COM box of the code stream of JPEG2000 compressed image and this SF value and secret key are used to extract the embedded watermark on the receiver side. The performance of the proposed technique is robust to a variety of attacks like image cropping, salt and pepper noise, and rotation. Proposed technique is compared with the existing watermarking techniques for JPEG2000 compressed images to show its effectiveness.
Chemical Engineering Diponegoro University
2015-11-07 22:26:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8680
International Journal of Science and Engineering; Vol 9, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5596
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Potential of an asymmetrical agitation in industrial mixing
Nishi, Kazuhiko
Department of Materials Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama
Enya, Naoki
Department of Materials Science and Chemical Engineering, School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama
Sonoda, Kazufumi
Department of Materials Science and Chemical Engineering, School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama
Misumi, Ryuta
Department of Materials Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama
Kaminoyama, Meguru
Department of Materials Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama
Array
Mixing is one of the most fundamental operations in chemical engineering. Stirred tanks are widely used in the manufacture of such materials as chemicals, paints, inks, electronics materials, ceramics, foods, pharmaceuticals and cosmetics. Suitable mixing is indispensable to the purpose achievement of a process. Eccentric mixing, in which an impeller installed at eccentric position in a vessel, is one of the traditional methods of promoting mixing. An asymmetrical flow which occurs in vessel is complicated, and it promotes mixing, distribution, and mass transfer. In this study, a new mixing method which eccentric mixing using a large type impeller which attracts attention in recent years is shown. The high performance of a large impeller can be combined with the advantages of an eccentric impeller by using the impeller at an eccentric position. The power consumption and mixing time for MAXBLEND, which is a type of large impeller, were investigated. The power consumption, P, and mixing time, θM, were measured under various eccentric conditions. The relation between the power number (Np) and Reynolds number (Re) and that between the dimensionless mixing time (nθM) and Re were investigated. When eccentric mixing is used industrially, we should be concerned about the horizontal load to a agitating shaft. The large oscillating horizontal load causes serious problems, such as the falling off of the impeller or the breakage of the motor, mechanical seal or gearbox. It is, therefore, important to understand the relation between these values and the impeller rotational speed when designing the mixing equipment and determining the operating conditions. In this study, the torque and horizontal load were measured in eccentric mixing under various eccentric conditions. The averages of both, the torque and the horizontal load, and their standard deviations, corresponding to the amplitude of fluctuation, were shown.
Doi: 10.12777/ijse.5.2.73-80
[How to cite this article: Nishi, K., Enya, N., Sonoda, K., Misumi, R., Kaminoyama, M. (2013). Potential of an asymmetrical agitation in industrial mixing. International Journal of Science and Engineering, 5(2),73-80. Doi: 10.12777/ijse.5.2.73-80]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5596
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/11552
2018-01-17T08:30:49Z
ijse:ART
nmb a2200000Iu 4500
"160415 2016 eng "
2302-5743
2086-5023
dc
Properties of Carbon Black from Jatropha Seed Shell as A Potential Source of Filler Enhancement in Biocomposites
Aprilia, N. A. Sri
Chemical Engineering Department, Engineering Faculty of Syiah Kuala University, Banda Aceh
Khalil, H.P.S. Abdul
School of Industrial Technology, Universiti Sains Malaysia, 11800 Penang
Amin, Amri
Engineering Department, University of Abulyatama, Lampoh Kedee, Aceh Besar
Array
The use of biomass as filler in biocomposites are becoming widespread in the present decade because its variety of advantages. Jatropha (jatropha curcas L) seed shell after separated from kernel can be used to produce carbon black because of its higher carbon content, and have the potentiality to use as reinforcement in composites. In this study, carbon black was produced from jatropha seed shell by carbonization in furnace method for 1 hour at 600oC. Thermo gravimetric analysis to analyze seed shell of jatropha as raw material. The morphological properties of the carbon black were analyzed by elemental analysis by X-ray (EDX), SEM, TEM, XRD, SEM, and TEM. It was found that the yield of carbon black was 40% which included 4 different sizes ranging from 70 – 300 mesh in distribution of particle size analysis. Carbon black suggested that it could be a good filler or reinforcement in biocomposites
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
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https://ejournal.undip.ac.id/index.php/ijse/article/view/11552
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6017
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Replacing Sugar by Date Syrup in Gaz and Investigation of Texture Properties
Ardali, Fateme Raiesi
Department of Food Science and Technology, Faculty of Agriculture, Islamic Azad University, ShahreKord Branch
Nilchian, Zahra
Department of Food Science and Technology, Faculty of Agriculture, Islamic Azad University, ShahreKord Branch
Ahmadi, Saeid
Department of Food Science and Technology, Quchan Branch, Islamic Azad University, Quchan
Shariati, Mohammad Ali
Department of Food Science and Technology, Research and Science Branch, Islamic Azad University, Tehran
Akbarian, Mina
Department of Food Science and Technology, Tabriz University, Tabriz
Array
Date Syrup is a natural sweetener that is suitable replacement for sugar in food stuffs formulation. In this Research Amounts of 25-100 percent of sugar in Gaz formulation were replaced with date syrup and to study effect of its use in product formulation, characteristics of texture, color and sensory analyse of treatments were investigated. Statistical analyse of data was also done by SPSS software and Dankan test. The results of this research showed that amount of used date syrup in formulation had a significant effect on color parameters (L*,a*,b*), texture characteristics and sensory analyse of samples. By increase of date syrup in Gaz formulation, samples texture became softer than control sample and yellowness and redness index of samples were increased
Doi: DOI: 10.12777/ijse.6.1.11-15
[How to cite this article: Shafiei, Z., Hojjatoleslami, M., Soha, S., and Shariati, M.A. 2014. The Influence of Malt Extraction Adding to UF Fresh Low Fat Cheese on Its Textural Properties. International Journal of Science and Engineering, 6(1):57-60. Doi: 10.12777/ijse.6.1.11-15
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6017
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1248
2012-01-03T11:12:42Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Ability of Lactobacillus plantarum JR64 isolated from noni juice in lowering Cholesterol in vivo
Sumarno, Lanjar
Biotech Center - BPPT, Gedung 630, Kawasan Puspiptek Serpong, Tangerang Selatan
Mangunwidjaja, Djumali
Agriculture Industrial Technology - IPB, Bogor
M. Fauzi, Anas
Agriculture Industrial Technology - IPB, Bogor
Syamsu, Khaswar
Agriculture Industrial Technology - IPB, Bogor
Siswi Indrasti, Nastiti
Agriculture Industrial Technology - IPB, Bogor
Prasetya, Bambang
Lembaga Ilmu Pengetahuan Indonesia (LIPI), Jakarta
Recently public’s attention to the importance of healthy food increases rapidly. Probiotic based food exploiting lactic acid bacteria is among the healthy food. Lactobacillus plantarum JR64 isolate from Morinda citrifolia fruit was assessed for its probiotic in-vivo by using Wistar Rat. The purpose of this research was to study the ability of probiotic Lactobacillus plantarum JR64 in lowering serum LDL (Low Density Lipoprotein) of Wistar Rat. Twenty Rats were grouped into 4, each group consisted of 5 Rats. First Group was a negative control given standard normal diet of 20 gr/day plus aquadest. Second Grup was a positive control given cholesterol normal diet 20 gr /day plus Propil Tio Urasil (PTU) 60 mg/kg body weight/day. Third Group was supplemented with normal diet 20 gr /day plus Propil Tio Urasil (PTU) 60 mg kg body weight /day and 1012 CFU Lactobacillus plantarum JR64. Fourth Group was the same as third Group unless the probiotic using commercial probiotic Lactobacillus bulgariccus at 1012 CFU. Blood samples were withdrawn for measurement of total cholesterol, triglyceride, High Density Lipoprotein (HDL), and Low Density Lipoprotein (LDL) cholesterol every week and measured by using spectrophotometer with 546 nanometers wavelength. The results show that probiotic Lactobacillus plantarum JR64 isolated from noni juice significantly (p < 0,01) reduce Low Density Lipoprotein (LDL) and Triglyceride in vivo and tend to reduce High Density Lipoprotein (HDL) and total cholesterol.
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1248
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6668
2015-02-16T08:58:09Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
The Nutrient Digestibility of Locally Sheep Fed with Amofer Palm Oil Byproduct-Based Complete Feed
Template, Template
Array
Utilization of palm oil by-product such as palm fronds, leaves, empty fruit bunches (EFB), fiber fruit juice (FFJ), palm kernel cake (PKC), and palm oil sludge (POS) as the source of energy and protein for ruminants, especially sheep is an efficient effort to make a new opportunities in term of economical and beneficial product that will reduce environmental pollution. The objectives of this research were to analyze the effect of palm oil’s byproduct-based complete feed on sheep’s nutrient digestibility. Sixteen male sheeps of nine month old with average body weight 14.69+0.82 kg were used. The complete feed was formulated by ammoniated-fermented technology from palm fronds and leaves, EFB and FFJ, also Centrosema sp., PKC, POS, ground corn, rice bran, cassava, molasses, urea, mineral mix and salt. The complete feed with different levels of crude protein (CP) and TDN were used in this research which consisted of T1=10,63% CP; 63.46% TDN; T2=12.27% CP; 62.38% TDN; T3=13.70% CP; 64.11% TDN; and T4=15.90% CP; 61.28% TDN. The study used a completely randomized design (CRD) which consisted of four treatments and four replications. Data was analyzed using ANOVA with significance level at 95% and followed by Duncan Multiple Range Test. The experimental results showed that the protein level affected the feed digestibility. The highest digestibility of dry matter, organic matter and crude protein were 65.79%, 70.30%, and 84.34% respectively, resulting in 14% protein level (T3) were significantly different with treatment at protein level 10% (T1), 12% (T2) and 16% (T4) at p<0.05. It can be concluded that by-product of palm oil plantation and mill had good nutritional value. Therefore, this feedstuff can be used to formulate complete feed for sheep and it successfully increased the nutrient digestibility.
Chemical Engineering Diponegoro University
2014-01-06 15:07:24
application/zip
https://ejournal.undip.ac.id/index.php/ijse/article/view/6668
International Journal of Science and Engineering; ARTICLE IN PRESS
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1278
2012-01-03T11:12:42Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Front Cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front Cover
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1278
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6746
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Potential Development of Liquid Smoke from Oil Palm Solid Waste as Biofungicides
Gani, Asri
Chemical Engineering Department, Faculty of Engineering, Syiah Kuala University, Darussalam, Banda Aceh, INDONESIA
Husni, Husni
Department of Agro technology, Syiah Kuala University, Aceh
Baihaqi, Akhmad
Department of Agribusiness, Syiah Kuala University, Aceh
Faisal, M.
Department of Chemical Engineering, Syiah Kuala University, Aceh
Array
This research investigated the potential utilization of solid waste from palm oil industry for liquid smoke production in Aceh Province, Indonesia. The liquid smoke can be applied as bio fungicides in agricultural field. Preliminary experiment on the use of liquid smoke as fungicide at Colletotrichum capsisi fungus which causes anthracnose disease on red pepper was also conducted. The survey on the existing potential/availability of palm oil mill in Aceh shows that there are 30 palm oil mills in eight districts with a total of production capacity 1020 ton/hour. Assuming that 10% of palm oil kernel shells are pyrolized into liquid smoke, Aceh province could produce about 23,868 ton of liquid smoke per year. The preliminary test result towards Colletotrichum capsisi fungus shows that the liquid smoke can be used as fungicides.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6746
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3399
2012-04-29T18:09:27Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Front Cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front Cover
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3399
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4204
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121201 2012 eng "
2302-5743
2086-5023
dc
Bioaccumulation of Pb and Cd on Broiler Chicken Fed in Difference Diets
Dwiloka, Bambang
Faculty of Animal Agriculture, Diponegoro University, Semarang, Central Java
Atmomarsono, U.
Priyo Bintoro, V.
Widianarko, B.
The study was aimed to compute Pb and Cd bioaccumulation in different organs of broiler. Carcass, heart, liver, gizzard, intestine, and excreta. The data were obtained from broiler reared in the litter cage. Four treatments of feed were given to the broiler chicken, i.e. T1 = X brand of commercial feed, T2 = Y brand of commercial feed, T3 = self-prepared feed without fish meal addition and T4 = self prepared feed without fish meal but contaminated with cadmium chloride (Cd.Cl2.4H2O). For each treatment, five broiler chicken were grouped each week (from week I up to week VI). Results of the first stage of this study was analyzed descriptively. A polinomial regression equation was used as an empirical model to describe the heavy metal bioaccumulation phenomenon in broiler carcasses. The quadratic equation turned out to be the most suitable model for describing the bioaccumulation of heavy metal in broiler carcasses. From the simulation, it was found that quadratic model fit to 61.31% and 54.17% bioaccumulation data of Pb and Cd respectively. According to the model, initially metal concentrations declined since the first week and started to rebound at the fifth week, both in terms of chronological and physiological age. The patterns of Pb and Cd bioaccumulation in this study can be used as a reference to determine the proper slaughter period. It can be concluded that for reducing the risk of metal contamination the proper slaughter time of the broiler is before the fifth week.
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4204
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7553
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Synthesis Biodiesel from Palm Oil Through Interesterification Using Imobilized Lipase Enzym as Catalyst: The Effect of Amount of Biocatalyst, Mole Ratio of Reactan, Temperature to Yield
Widyawati, Melina
University of Sumatera Utara
Manurung, Renita
University of Sumatera Utara
Afrianto, Ricky
University of Sumatera Utara
Array
Biodiesel usually synthesized by transesterification of triglyceride and alcohol by addition of acid or base catalyst so there is could produce a waste of chemical process. Alternative process is by using biocatalyst such as enzyme to synthesize biodiesel without chemical process waste. In this research, synthesis of biodiesel from Crude Palm Oil (CPO) that through the process of degumming and methyl acetate as acyl donor has been investigated with using Lipozyme as biocatalyst. Variables in this research are amount of biocatalyst, mole ratio of reactant, and temperature, and its respond to the yield conversion of biodiesel that presented by using Response
Surface Methodology (RSM). Yield raging from 15% - 68% were achived during 10 hours reaction time. The results showed that the most influential variable is amount of biocatalyst.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7553
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/4582
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130312 2013 eng "
2302-5743
2086-5023
dc
Result of Six Local Upland Rice Cultivars of East Kalimantan at Different Plant Spacing
Rusdiansyah, R.
Agro-technology Departement of Agricultural faculty, Mulawarman University, Samarinda, East Kalimantan.
Ismi Intara, Yazid
Indra Setiawan, Budi
Array
The objective of this research was to evaluate the response of six upland rice cultivars from East Kalimantan over different plant spacing. The experiment was conducted at Kutai Kartanegara district in East Kalimantan, Indonesia. The experimental design used was the factorial experiment in Randomized Completely Block Design (RCDB) with three replications. The first factor was six upland rice cultivars of East Kalimantan, i.e.: v1 (Mayas Pancing), v2 (Gedagai), v3 (Bogor Putih), v4 (Mayas Putih), v5 (Serai) and v6 (Kunyit). The second factor was plant spacing i.e.: j1 (20 x 20 cm) and j2 (30 x 30 cm). The results showed that among the six cultivars, Gedagai, Bogor Putih and Kunyit produced higher yield than other varieties. Gedagai and Bogor Putih cultivars produced higher yield of 2.99 ton ha-1 at plant spacing 20 x 20 cm, whereas Kunyit produced higher yield of 2.66 ton ha-1 at plant spacing 30 x 30 cm. The agronomic characters showed that plant height of the six cultivars differed significantly at harvest time. In addition, highly significant differences of harvest time were observed of the six cultivars.
Doi: http://dx.doi.org/10.12777/ijse.4.2.2013.66-68
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4582
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8154
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Potential of Glutathione Antioxidant in the Hippocampus Repair: Preliminary Study on Bioactive Materials Antiaging of Snakehead Fish (Channa striata) in Animal Models of Aging
Sunarno, Sunarno
Biology Laboratory Structure and Function of Animals, Department of Biology, Faculty of Science and Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH, Tembalang, Semarang
Array
Snakehead fish meat contains active ingredients with anti-aging potential that serves as a precursor of glutathione. The ability of glutathione as an antiaging opportunities in the utilization of fish meat, especially snakehead fish. Snakehead fish meat contains several important amino acids, such as glutamine, cysteine, and glycine so the potential to be developed for the production of food that is nutritious and healthy. This study examines the essential amino acid composition of the antioxidant glutathione precursors found in snakehead fish from Rawa Pening Central Java to increase glutathione in the body and brain. The results showed that every 100g of snakehead fish meat from Rawa Pening containing glutamine (32.39%), cysteine (6.61%), and glycine (9.69%). Snakehead fish meat extract given at a dose of 30 ml/kg/day in both types of animal models of aging effect on the increase in the content of glutathione and glutathione precursors, both in blood and hippocampus. Increased glutathione precursor of the most high to low, respectively glutamine, glycine, and cysteine. Availability of essential amino acids can support increased glutathione in the brain. This is indicated by an increase in glutathione hippocampus in both animal models, both on chronological aging or aging due to oxidative stress, respectively (0.822 and 0.359) mol/g bb compared to control tissue.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8154
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5139
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Dissolved Oxygen Availability on Traditional Pond Using Silvofishery Pattern in Mahakam Delta
Fahmy Almadi, Ismail
Fisheries and Marine Science Faculty of Mulawarman University, Campus Gunung Kelua Samarinda, East Kalimantan
Supriharyono, S
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Nur Bambang, Azis
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Array
The development of aquaculture system should meet the community’s basic need economically by taking into account the carrying capacity and environmental sustainability. The development of the environmentally friendly system such as silvofishery is being promoted by government however its yield has not reached the target yet. Dissolved oxygen availability is an important indicator which determines the success of the aquaculture system. The objective of the research was to determine dissolved oxygen availability on traditional pond systems using silvofishery pattern. Time series data collection was conducted once in 14 days with 2 measuring times; in the morning (06.00 am) and in the evening (06.00 pm) for 112 days. The research was conducted at four different silvofishery pond patterns, Pond Pattern 1 (0% mangrove canopy covered), Pond Pattern 2 (35% mangrove canopy covered), Pond Pattern 3 (67% mangrove canopy covered), and Pond Pattern 4 (75% mangrove canopy covered). Measurement was observed openly in the pond (in situ) with parameters: dissolved oxygen, temperature, Water pH, Salinity, Transparency, Wind Speed, and Depth of Water Table, while chlorofil-a was ex-situ measured. The result from each parameter was compared to optimum concentration rate for shrimp growth. From the experiment, Pond Pattern 1 showed the most satisfaction results. Its dissolved oxygen availability during the research was ≥ 4 mg/L which was 5.88 mg/L ±0.48 mg/L in the evening (06.00 pm) and 4.33 mg/L ±1.24 mg/L in the morning (06.00 am). It was also supported by optimum condition of other parameters such as temperature, Water pH, Salinity, Wind Speed, and Depth of Water Table. However, it was not supported by fertility and transparency of water. Thus, the traditional pattern of conservation still needs additional technology to maintain adequate dissolved oxygen availability for optimum shrimp growth.
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5139
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8573
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Effects of aligned magneticfield and radiation on the flow of ferrofluids over a flat plate with non-uniform heat source/sink
N, Sandeep
Gulbarga University
CSK, Raju
VIT University
C, Sulochana
Gulbarga University
V, Sugunamma
S.V.University
Array
In this study we analyzed the influence of radiation and aligned magneticfield on the flow of ferrofluids over a flat plate in presence of non-uniform heat source/sink and slip velocity. We considered Fe3O4 magnetic nano particles embedded within the two types of base fluids namely water and kerosene. The governing partial differential equations are transformed into nonlinear ordinary differential equations by using similarity transformation and solved numerically using bvp5c Matlab package. The effects of dimensionless quantities on the flow and temperature profiles along with the friction factor and Nusselt number is discussed and presented through graphs and tables. It is found that present results have an excellent agreement with the existed studies under some special assumptions. Results indicate that a raise in the aligned angle enhances the skin friction coefficient and heat transfer rate.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8573
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5591
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Carcass Characteristics of Growing Male Pig in Different Level of Clenbuterol Addition
Dilaga, Wayan Sukarya
Cattle Science Department, Faculty of Animal Agriculture, Universitas Diponegoro
Array
Abstract - Nowadays, pig has becomes an important role in meat supply chain and demand in the world. However, in the intensive maintenance system, raising pig still has problems especially in feed supplements. The investigation on carcass characteristics of growing male pig in different level of clenbuterol addition in feed was conducted. CRD factorial 2 x 3 with 4 repetitions was used in the experiment. The first factor is the nation's pig (L = local pigs & pig off spring K=imports) and the second factor is the level of clenbuterol (T0 = 0 mg/kg feed; T1 = 0.20 mg/kg feed & T2 = 0.40 mg/kg feed). The materials were 24 male grower pigs (12 local & 12 imported pigs) with 52.5 ± 28.27 kg body weight. Pigs were reared in individual cages for 6 weeks consisting 2 weeks for adaptation and 4 weeks for data collection. The pigs were given the same feed consisting of rice bran 27.8%, 55.5% and 16.7% corn concentrate. Feeding pigs was given in appropriate growth phase as much as 2 times a day. Drink provided using ad-libitum method. At the end of the study, the pigs were slaughtered. The meat was then analyzed based on the weight of the cut meat, weight of hot carcass, carcass percentage and carcass components (meat, bones and fat). The data was analyzed in variety followed by various orthogonal polynomial tests. Results shown that there were a real interaction between carcass weight and weight cut with quadratic pattern. Clenbuterol also found out to give an reduction effect on carcass percentage in both local and imported pig. In fact the local pigs give the lower carcass percentage than the imported one.
Key Words – clenbuterol; weight cut; carcass percentag; carcass component
Doi: 10.12777/ijse.5.2.47-50
[How to cite this article: Dilaga, W.S. (2013). Carcass Characteristics of Growing Male Pig in Different Level of Clenbuterol Addition. International Journal of Science and Engineering, 5(2):9-14. Doi: 10.12777/ijse.5.2.9-14]. Doi: 10.12777/ijse.5.2.47-50
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5591
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8719
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
dc
Unsteady MHD flow of a dusty nanofluid past a vertical stretching surface with non-uniform heat source/sink
Sulochana, C.
Department of Mathematics, Gulbarga University, Gulbarga
Prakash, J.
Department of Mathematics, University of Botswana, Private Bag 0022, Gaborone, Botswana
N, Sandeep
Gulbarga University
Array
We analyzed the momentum and heat transfer characteristics of unsteady MHD flow of a dusty nanofluid over a vertical stretching surface in presence of volume fraction of dust and nano particles with non uniform heat source/sink. We considered two types of nanofluids namely Ag-water and Cu-water embedded with conducting dust particles. The governing equations are transformed in to nonlinear ordinary differential equations by using similarity transformation and solved numerically using Shooting technique. The effects of non-dimensional governing parameters on velocity and temperature profiles for fluid and dust phases are discussed and presented through graphs. Also, the skin friction coefficient and Nusselt number are discussed and presented for two dusty nanofluids separately in tabular form. Results indicate that an increase in the volume fraction of dust particles enhances the heat transfer in Cu-water nanofluid compared with Ag-water nanofluid and a raise in the volume fraction of nano particles shows uniform heat transfer in both Cu-water and Ag-water nanofluids.
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8719
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5676
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Dynamic Mechanical and Gel Content Properties of Irradiated ENR/PVC blends with TiO2 Nanofillers
Ramlee, Nur Azrini
Faculty of Chemical Engineering, University Technology MARA Shah Alam, 40450 Shah Alam, Selangor
Ratnam, Chantara Thevy
Malaysian Nuclear Agency (Nuclear Malaysia), Bangi, 43000 Kajang
Alias, Nur Hashimah
Faculty of Chemical Engineering, University Technology MARA Shah Alam, 40450 Shah Alam, Selangor
Abd Rahman, Mohd Faizal
Malaysian Nuclear Agency (Nuclear Malaysia), Bangi, 43000 Kajang
Array
Numerous studies reported on irradiated epoxidized natural rubber/polyvinyl chloride (ENR/PVC) blends and the blends were found miscible at all compositional range thus it offers a broad of opportunity in modifying the blend characteristic. Addition of low loading titanium dioxide (TiO2) nanofillers in the ENR/PVC blends has shown a remarkable increment in tensile strength. Thus, this study was initiated to address the effect of TiO2 nanofillers on ENR/PVC blends dynamic mechanical and gel content properties and its morphology upon exposure to electron beam irradiation. ENR/PVC blends with addition of 0, 2 and 6 phr TiO2 nanofillers were first blended in a mixing chamber before being irradiated by an electron beam accelerator at different 0-200 kGy irradiation doses. The influence of TiO2 nanofillers on the irradiation crosslinking of ENR/PVC blends was study based on the dynamic mechanical analysis which was carried out in determining the glass transition temperature and the storage modulus behavior of ENR/PVC blends incorporated with TiO2 nanofillers. Formations of irradiation crosslinking in the blend were investigated by gel content measurement. While, the TiO2 nanofillers distribution were examined by Transmission Electron Microscope (TEM). Upon irradiation, the ENR/PVC/6 phr TiO2 formed the highest value of gel fraction. For dynamic mechanical analysis, it was found that electron beam radiation increased the Tg of all the compositions. The relationship between the crosslinking and the stiffness of the nanocomposites also can be found in this study. The enhancement in the storage modulus and Tg at higher amount of TiO2 in the blend could be correlated to the enhancement of the irradiation-induced crosslinking in the nanocomposites characteristic and also with the higher agglomerations of TiO2 evidence shown from the TEM micrograph examination. Lastly, the dimensions of TiO2 in the blends were found less than 100 nm in diameter which indicates incorporation of TiO2 nanofillers in ENR/PVC blends is potentially to provide the nanocomposites features.
Doi: 10.12777/ijse.6.1.24-30
[How to cite this article: Ramlee, N.A., Ratnam, C.T., Alias, N.H., Rahman, M.F.A.. 2014. Dynamic Mechanical and Gel Content Properties of Irradiated ENR/PVC blends with TiO2 Nanofillers. International Journal of Science and Engineering, 6(1),24-30. Doi: 10.12777/ijse.6.1.24-30]
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5676
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1238
2012-02-12T01:38:24Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Foam Behaviour of An Aqueous Solution of Piperazine- N-Methyldiethanolamine (MDEA) Blend as A Function of The Type of Impurities and Concentrations
Ratman, Iwan
Total SA, Strategy Business Development, LNG Departemnt, Tour Couple, La Defense, Paris, France
Kusworo, Tutuk Djoko
Department of Chemical Engineering,
University of Diponegoro, Jl. Prof. Sudharto SH No. 1, Semarang, Indonesia
Ismail, Ahmad Fauzi
Advanced Membrane Research Technology Center,
Faculty of Chemical and Natural Resources Engineering,
Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor Bahru, Malaysia
This study focuses on the effect of impurities in the natural gas stream on the characteristic of foam behaviour in the blended piperazine and MDEA solution. Hydrocarbon liquids, Iron Sulphide, Sodium Chloride, Acetic Acid, Methanol and Polyethylene Glycol were used as the impurities. The results indicated that the type of impurities determined the foam formation of the amine solution. The concentration of piperazine-MDEA blends also enhanced to the increasing of the foam height of blended piperazine-MDEA. Iron sulfide, hydrocarbon and sodium chloride are the impurities which apparently contributed to the high foaming tendency of the solutions. At the same concentration of the impurities, iron sulfide appeared as the most influential contaminant to the foam formation, which promoted the highest foamability in any concentrations of the blend piperazine-MDEA
Chemical Engineering Diponegoro University
2010-07-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1238
International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/16637
2019-04-23T22:04:33Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
An Extensive Study of Thermo-electric Effect
Das, Mukul Chandra
Array
In well known thermo-electric effect (i.e. in thermo-couples generally used in college laboratories) the maximum temperature difference between the junctions approaches 100oC resulting in small magnitude of the current and potential difference produced. These are in the micro range. To have higher currents and potential differences a different type of experiment is to be performed.
In this work an experiment has been proposed where thermo-electric effect is observed more prominently for different temperatures of a hotter conductor while keeping another conductor fixed at lower temperature (generally the room temperature) making the temperature difference too high resulting in the current and potential difference to increase.
Experiment has also been performed to increase the thermo-electric power by joining a number of thermo-couples.
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/16637
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/7675
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
APPLICATION OF WELL LOG ANALYSIS IN ASSESSMENT OF PETROPHYSICAL PARAMETERS AND RESERVOIR CHARACTERIZATION OF WELLS IN THE “OTH” FIELD, ANAMBRA BASIN, SOUTHERN NIGERIA
URORO, Eugene
University of Benin, Benin City
Nigeria
IGHARO, Efe Lucky
University of Benin,Benin City
Array
Over the past years, the Anambra basin one of Nigeria’s inland basins has recorded significant level of hydrocarbon exploration activities. The basin has been confirmed by several authors from source rock analyses to have the potential for generating hydrocarbon. For the hydrocarbon to be exploited, it is imperative to have a thorough understanding of the reservoir. Computer-assisted log analyses were employed to effectively evaluate the petrophysical parameters such as the shale volume (Vsh), total porosity (TP), effective porosity (EP), water saturation (Sw), and hydrocarbon saturation (Sh). Cross-plots of the petrophysical parameters versus depth were illustrated. Five hydrocarbon bearing reservoirs were delineated in well 1, four in well 2. The reservoirs in well 3 do not contain hydrocarbon. The estimated reservoir porosity varies from 10% to 21% while their permeability values range from 20md to 1400md. The porosity and permeability values suggest that reservoirs are good enough to store and also permit free flow of fluid. The volume of shale (0.05% to 0.35%) analysis reveals that the reservoirs range from shaly sand to slightly shaly sand to clean sand reservoir. On the basis of petrophysics data, the reservoirs are interpreted a good quality reservoir rocks which has been confirmed with high effective porosity range between 20% and high hydrocarbon saturation exceeding 55% water saturation in well 1 and well 2. Water saturation 3 is nearly 100% although the reservoir properties are good.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7675
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1267
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Synthesis and Characterization of Nafion-SiO2 Composite Membranes as an Electrolyte for Medium Temperature and Low Relative Humidity
Mahreni, Mahreni
Department of Chemical Engineering, Faculty of Industrial Technology Universitas Pembangunan Nasional “Veteran” Yogyakarta
Listiani Dewi, Eniya
Badan Pengkajian Penelitian dan Teknologi
Jl. M.H. Thamrin 8 Jakarta
Marnoto, Tjukup
Pawignyo, Harso
Subagyo, Purwo
Sulistyowati, Endang
The weakness of the Nafion membrane as electrolyte of PEMFC associated with physical properties that is easy to shrink at temperatures above 80°C due to dehydration. Shrinkage will decrease the conductivity and membrane damage. Nafion-SiO2 composite membranes can improve membrane stability. The role of SiO2 in the Nafion clusters is as water absorbent cause the membrane remains wet at high temperatures and low humidity and conductivity remains high. The results showed the content of 2.8 wt% of SiO2 in the Nafion membrane, the conductivity of composite membrane is higher than the pure Nafion membrane that are 0.127 S cm-1 in dry conditions and 0.778 S cm-1 in wet conditions at room temperature. Compared with the pure Nafion membrane conductivity are 0.0661 S cm-1 and 0.448 S cm-1 respectively in dry and wet conditions.
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1267
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6799
2014-05-01T20:17:44Z
ijse:EDT
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Front Cover
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front Cover
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6799
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3010
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Effect of complete feed starch banana weevil pea stone on the beans goats system in vivo against carcass weight and carcass part
Aswandi, A.
Sutrisno, C. I.
Arifin, M.
Achmadi, Joelal
The objective of this research is to study the value of benefits in favor of complete feed production performance and carcass weight of any part of the carcass part-goat nuts. The design used in this study. Random Draft Complete. The material used in this study of 12 male goats Nuts averaging initial body weight (15.58 ± 2.601 kg) with a CV: 16.69%, age 10-15 months. At the end of the study 12 goats to know the weight of nuts cut carcass and parts of the carcass. Results of analysis of variance showed that treatment of complete feed on a significantly different (P <0.05) on carcass weight produced goat nuts. Results of analysis of variance showed that treatment of complete feed on a significantly different (P <0.05) against the weight of all the parts ice nuts goat carcass neck, shoulder, breast, leg chump on, ribs, loin, fore shank and the weight of the flank. CF0 and CF3 treatment effects did not provide a very real difference to the weight of carcass parts, but the weight of the carcass are treated CF3 higher than the CF0. This is in line with the expressed
[Keywords— banana weevil stone, complete feed goat bean]
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/3010
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5518
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
IMPLEMENTATION OF DEMONSTRATION PLOTS DME NYAMPLUNG (Calophyllum inophyllum L) IN BULUAGUNG AND PATUTREJO VILLAGES
Uripno, Bambang
Bogor Agricultural University
Kolopaking, Lala m.
Institut Pertanian Bogor
Slamet, R. Margono
Institut Pertanian Bogor
Amanah, Siti
Institut Pertanian Bogor
Array
The purpose of this study were to evaluate the condition of the frist demplot DME nyamplung. Energy self sufficient village program aims to improve stock and diverse energy source and society economic opportunity. Nyamplung is very potential plant to be used as raw material of biofuel, because it has very high fat plant content and has not be used for food. The biofuel from nyamplung is a new innovation. Involvement of forest village community in biofuel industry development both as producers and as consumers is very important. Forestry Ministry has established demonstration plots in Buluagung and Patutrejo villages as a facilitation in developing biofuel nyamplung silvoindustry. Up to now, the demplots still faces some problems. The researh method was qualitatif analysis. Collecting data from 62 respondents using purposive sampling. Data were collected using questionnaires, field obsevation, and in-depth interview. Focus group discussion was used to confirm the data from the respondents. Research results show that the demplots have not been developed through participatory approach. Involvement of community to demplots activity is low. Involvement of the village communities are significantly correlated to biofuel price, technology innovation, role of demplot and support from local leaders.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5518
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/5518/12123
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oai:ojs.ejournal.undip.ac.id:article/7222
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
THE EFFECT OF Fe-ENRICH PHASE ON THE PITTING CORROSION RESISTANCE OF Al ALLOY IN VARIOUS NEUTRAL SODIUM CHLORIDE SOLUTIONS
Priyotomo, Gadang
Research Center for Metallurgy and Material, Indonesian Institute of Sciences, Serpong, Tangerang Selatan, Banten
Gede Putrayasa Astawa, I Nyoman
Research Center for Metallurgy and Material, Indonesian Institute of Sciences, Serpong, Tangerang Selatan, Banten
Array
The pitting corrosion of 5052 alloy was investigated as function of chloride concentrations by using an electrochemical method, scanning electron microscope and energy dispersive X-Ray spectroscopy in neutral sodium chloride solutions at 293 K. The pitting corrosion of pure Al was also investigated under the same experimental condition for the comparison. The pitting potential obtained for 5052 alloy and pure Al decreased with increasing chloride concentration. The pitting potential of pure Al is higher than that of 5052 alloy where pitting resistance of pure Al is better than that 5052 alloy. The linear equation implies that certain pitting potential becomes a relevant parameter for predicting certain chloride ion concentration. The synergic role of chloride ion and a localized galvanic corrosion between aluminium metal and iron-containing constituent contribute the process of pitting for 5052 alloy.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7222
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/4310
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130105 2013 eng "
2302-5743
2086-5023
dc
Development of Navigation Control Algorithm for AGV Using D* search Algorithm
Geun Kim, Jeong
Department of Mechanical and Automotive Eng., Pukyong National University, Busan 608-739
Hwan Kim, Dae
Kwun Jeong, Sang
Kyeong Kim, Hak
Bong Kim, Sang
In this paper, we present a navigation control algorithm for Automatic Guided Vehicles (AGV) that move in industrial environments including static and moving obstacles using D* algorithm. This algorithm has ability to get paths planning in unknown, partially known and changing environments efficiently. To apply the D* search algorithm, the grid map represent the known environment is generated. By using the laser scanner LMS-151 and laser navigation sensor NAV-200, the grid map is updated according to the changing of environment and obstacles. When the AGV finds some new map information such as new unknown obstacles, it adds the information to its map and re-plans a new shortest path from its current coordinates to the given goal coordinates. It repeats the process until it reaches the goal coordinates. This algorithm is verified through simulation and experiment. The simulation and experimental results show that the algorithm can be used to move the AGV successfully to reach the goal position while it avoids unknown moving and static obstacles.
[Keywords— navigation control algorithm; Automatic Guided Vehicles (AGV); D* search algorithm]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4310
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7935
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
DEVELOPMENT OF JAPANESE QUAIL (Coturnix coturnix japonica) EMBRYO
Saraswati, Tyas Rini
Diponegoro University https://www.facebook.com/tyas.rini.18
Tana, Silvana
Diponegoro University
Array
This experiment was conducted to determine the development of Japanese quail embryo (Coturnix coturnix japonica), through observation and measurement of embryo organ development from the age of one day until hatching. The study used 15 female quails and 5 male quails. 15 female quails were divided into 5 cages, each cage containing 3 quails females and 1 male quail. Eggs which are inserted into an egg incubator is produced when the quail began the age of 3 months. Descriptive observation has been made towards the development of organs in the embryo. Based on the results of the study, the growth and development of quail embryo organs occur in stages until hatching occurred during the 16 days.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7935
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7935/17325
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5078
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Experimental Analysis for Factors Affecting the Repeatability of Plastics Injection Molding Tests on the Self-developed Apparatus
Huang, Yugang
State Key Laboratory of Powder Metallurgy, Central South University
Changsha 410083
Li, Duxin
State Key Laboratory of Powder Metallurgy, Central South University
Changsha 410083
Liu, Yuejun
Key Laboratory of Advanced Materials and Technology for Packaging of Hunan Universities, Hunan University of Technology, Zhuzhou 412007
Array
To improve the repeatability of the injection molding test result, the affecting factors were investigated by means of experiments. Besides the traditional processing parameter, the factors of test conditions were also considered. In order to focus on the molding process rather than the molded part, the curve measurement of the melt pressure at the entrance to the nozzle was used as the output characteristic. Experiments for polypropylene (PP) showed that the injected volume was the key processing parameter. Within the test conditions, the injection number is the most important factor. According to the analysis the operating procedure was improved effectively.
Doi: 10.12777/ijse.5.1.6-11
[How to cite this article: Huang, Y., Li, D., Liu, Y. (2013). Experimental Analysis for Factors Affecting the Repeatability of Plastics Injection Molding Tests on the Self-developed Apparatus. International Journal of Science and Engineering, 5(1),6-11. Doi: 10.12777/ijse.5.1.6-11]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5078
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7755
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
ANALYSIS OF CHEMICAL AND MICROBIAL CHANGE DURING STORAGE OF OVERRIPE TEMPEH POWDER AS SEASONING MATERIAL
Hassanein, Tia Raisha
Swiss German University
Prabawati, Elisabeth Kartika
Swiss German University
Gunawan-Puteri, Maria Dewi Puspitasari Tirtaningtyas
Swiss German University
Array
Tempeh and other soy-derived products are historically and currently some of the most important foods in the Asian region where diets remain predominantly plant-based. Overripe tempeh (tempe semangit) is a term used for over-fermented tempeh with pungent odor and darkening appearance commonly used in Javanese cuisine. Unique taste and odor of overripe tempeh lead to the exploration of its potencies as condiment, which may add the nutritional, safety and economic values of tempeh. In this research, overripe tempeh is made into powder for better appearance and availability. Oven drying at 60oC and freeze drying were applied to the overripe tempeh until it reached moisture content below 5%, followed by subsequent crushing into powder using electric grinding machine. As seasoning material, the tempeh powder and overripe tempeh powder were then analyzed for their stability. Observations in chemical and microbial changes during storage were also applied to selected product during storage. Parameters observed during the research are: moisture content, protein content, acid content, total microbial count and total coliform. Oven dried overripe tempeh (S60) has higher moisture content but lower in acid content, total microbial count and total coliform compared to freeze dried overripe tempeh (SFD).
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7755
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5504
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131018 2013 eng "
2302-5743
2086-5023
dc
The Determinant Factors of Creative Economy Craftsmen Sustainability in South Sulawesi Province
Ibrahim, Helda
Agribusiness Department Faculty of Agriculture, Makassar Islamic University
Amanah, Siti
Department of Society’s Communication and Development
Faculty of Human Ecology, Bogor Agricultural University
S. Asngari, Pang.
Department of Society’s Communication and Development
Faculty of Human Ecology, Bogor Agricultural University
Purnaningsih, Ninuk
Department of Society’s Communication and Development
Faculty of Human Ecology, Bogor Agricultural University
Array
Creative economy craftsmen have big contribution to regional income and able to sustain in crisis. It can be seen on the average of Gross Domestic Product has employed 5.4 million in average for 2002-2009 with participation level of 5.8%. Therefore, a strategic sustainability is needed especially for the determinant factors of sustainability related to creative economy craftsmen. This research aims to observe the determinant factors of sustainability of creative economy craftsmen in Wajo and Bulukumba Regencies in South Sulawesi Province. Sample for the research was 215 creative economy craftsmen. Data collection is conducted on January to April 2012 consists of primary and secondary data. Research method was using prospective analysis to determine important factors to the sustainability of creative economy craftsmen that predict future alternatives. Result from Rap-UEK simulation for the composite of five dimensions showed a less sustainable status of 48.97%. Research results showed that there are six dominant or main factors in determining business sustainability of creative economy craftsmen, one place sale, coordination with the government and private sectors, capital source, increase in the product of creative economy business, business field and product development
Doi: 10.12777/ijse.5.2.18-24
[How to cite this article: Ibrahim, H., Amanah, S., Asngari, P.S., and Purnaningsih, N. (2013). The Determinant Factors of Creative Economy Craftsmen Sustainability in South Sulawesi Province. International Journal of Science and Engineering, 5(2),18-24. Doi: 10.12777/ijse.5.2.18-24]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5504
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9227
2016-02-06T11:14:37Z
ijse:MED
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
IDENTIFICATION OF Staphylococcus sp. STRAINS ISOLATED FROM POSITIVE WIDAL BLOOD BASED ON 16S rRNA GENE SEQUENCES
Darmawati, Sri
Muhammadiyah Semarang University
Array
The purpose of this study is to identify 8 strains of Staphylococcus genus members isolated from positive Widal blood (4 strains of Staphylococcus saprophyticus, 1 strain of Staphylococcus warneri, 2 strains of Staphylococcus hominis, 1 strain of Staphylococcus xylosus and 1 strain of Staphylococcus capitis) based on 16S rRNA gene sequences. The methods used in this study are conducting PCR of 16S rRNA gene, cloning genes using T-Vector pMD20 which is transformed to E. coli DH5α, sequencing. The results show that four strains (BA 47.4, BA 19.2, KD 29.5 and TG 09.1) are identified as Stap. Saprophyticus strains of Stap. saprophyticus members of ATCC 15305T (99.01-100% similarity). The strain of TG 01.3 is identified as Stap. Warneri strain of TG 01.3 of Stap. Warneri members of ATCC 27836T (99.74-99.93% similarity), 2strains (KT 29.2 and KD 35.1) are identified as of Stap. hominis members of DSM 20328T (99.4-99.67% similarity). The strain of KT 30.5 is not identified
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9227
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5605
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Analysis of Erosion Level Using Map Windows Agricultural Non-point Source Pollution (MWAGNPS) on Jeneberang Sub-watershed South Sulawesi Province
Asrib, Ahmad Rifqi
Civil Engineering Department Faculty of Engineering, Makassar State University
Gunungsari Campus Jl. A.P. Pettarani Makassar
Purwanto, M. Yanuar J.
Department of Civil and Environmental Engineering Faculty of Agricultural Engineering, Bogor Agricultural University
IPB Campus Dramaga Bogor
S, Sukandi
Department of Civil and Environmental Engineering Faculty of Agricultural Engineering, Bogor Agricultural University
IPB Campus Dramaga Bogor
Eriza, E
Department of Civil and Environmental Engineering Faculty of Agricultural Engineering, Bogor Agricultural University
IPB Campus Dramaga Bogor
Array
The aims of this study was to obtain information about the level of soil erosion in Jeneberang sub watershed, as well as the impact of land management and information to determine the direction of land management in the watershed. The approach model used is MWAGNPS. MWAGNPS Model is a model of cell-based rainfall events with the main components are topographic maps, land use and soil type. This model is able to determine the source of erosion and the erosion that occurs. Simulation model showed when Jeneberang watershed has 31.66 mm of rain events with 30-minute rainfall intensity (EI30) can caused erosion 44.81 tons / ha and the sedimentation rate is 2,22 tons / ha. The source of erosion in Jeneberang sub watershed from farm/moor caused erosion is 29552.14 tons / ha and a total of 4,562,625.84 tons of sediment.
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5605
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1231
2011-12-11T17:51:09Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Influence of Casting Machine Speed in Cellulose Acetate Membrane Preparation
Buchori, Luqman
Department of Chemical Engineering, Diponegoro University Semarang
Membranes are being increasingly used as a valuable separation tool in laboratory as well as in industrial processes. Continual development of new membrane materials is crucial to sustain and expand the growing interest in this technology and modern polymer chemistry is highly proficient in tailoring polymers with desired properties such as increased mechanical, thermal and chemical stability. Cellulose acetate (CA) is one of the membrane polymers that has been used for aqueous based separation and used as both reverses osmosis (RO) and ultrafiltration (UF) membranes. This paper presents investigation of influence of casting machine speed in membrane preparation. CA is used in this study. That was CA-398-30 with average acetyl content 39.8 wt %. Non solvent used is water and the solvent is 99.7 % organic Dimethyl Sulfoxide (DMSO). The homogenous CA/DMSO solutions were prepared by dissolving CA in DMSO solvent. The CA concentration were varied 13 and 16 % while casting solution speed were varied from 20 to 80 mm/sec with distance cutting machine were fixed at 14 cm. In addition, non solvent in coagulation bath also were varied by 100 % water and 10 % DMSO in water. The results of this experiment describe effect of casting machine speed to water permeability. The effect of CA concentration to water permeability shows the adversative result between 13 and 16 % CA in 100 non solvent water. The similar result also observed in 10 % DMSO in water.
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1231
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9409
2018-01-17T08:30:49Z
ijse:ART
nmb a2200000Iu 4500
"160417 2016 eng "
2302-5743
2086-5023
dc
PHYSICOCHEMICAL PROPERTIES OF BABY INSTANT PORRIDGE FORTIFIED WITH IRON
Santosa, Herry
Chemical Engineering Department
Faculty of Engineering
Diponegoro University
Haryani, Kristinah
Chemical Engineering Department
Faculty of Engineering
Diponegoro University
Handayani, Noer Abyor
Chemical Engineering Department
Faculty of Engineering
Diponegoro University
Array
Fortification is one of solution to alleviate the deficiency of iron. Prevalence of iron deficiency anemia mostly on children under five years, i.e baby instant porridges. Purple sweet potatoes have a potential to be baby instant porridge. The aims of this research was to investigate the effect of fortificant’s type on Fe level as nutritional value, physicochemical properties (bulk density, rehydration capacity, and color) of baby instant porridges made from purple sweet potatoes. This study consists of several stages, which are the stage of making flour, fortification stage, the stage of making instant porridge and phase analysis results. The results show that iron-fortified added to instant baby porridge for nutritional characterization is below to the concentration of additional fortificant. The higher Fe identified on the addition of the iron concentration of 90 ppm (76.12 ppm) and lowest for the addition of concentration of 70 ppm (32.14 ppm). The results of physical properties for bulk density of instant porridge are (0.804 to 0.874 g / ml) showed there is no significant difference between variables and iron fortification no significant effect. Rehydration capacity (1.4 to 1.8 ml/g) with the addition of the iron various variable does not provide significant value changes and provide a lower value than the baby porridge with no fortificant (2 ml / g).
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9409
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/9409/21112
Copyright (c) 2018 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/5928
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Plants Growth Rate in Evapotranspiration continuous system reactors as the 2nd Treatment at Anaerobic-evapotranspiration system with High Strength Ammonium in Leachate Influent
Zaman, Badrus
Diponegoro University
Purwanto, Purwanto
Doctoral Programme of Environemental Science, Diponegoro University, Semarang
Mangkoedihardjo, Sarwoko
Department of Environmental Engineering, Sepuluh Nopember Institute of Technology, Surab
Array
Ammonium is one of parameter which responsible to leachate toxicity. Preliminary research was shown that the Fimbristylis globulosa (water plant), Alocasia macrorrhiza (terrestrial plant) and Eleusine indica (terrestrial grass) were potential plants for used as object in evaporation reactor system with high strength ammonium concentration in leachate treatment. This research was integrated of anaerobic system with evapotranspiration system with continuous influent using ammonium concentration in leachate was 2000 mg/l NH4-N. Plants growth rate was analyzed for 25 days operated. The result shown that average of thallus growth rate of Fimbristylis globulosa was 17,5 cm d-1. The average of leaf and thallus growth rate of Alocasia macrorrhiza was 18,1 cm d-1 and 3,2 cm d-1 respectively. The average of blade and thallus of Eleusine indica were same that was 4,7 cm d-1.This research conclude that integration system of anaerobic and evpotranspiration was be potential used for high strength ammonium in leachate treatment.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5928
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1281
2012-01-03T11:12:42Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Submission Information
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Submission Information
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1281
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6684
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Studies on as separation behaviour of polymer blending PI/PES hybrid mixed membrane: Effect of polymer concentration and zeolite loading
Ismail, Ahmad Fauzi
Advanced Membrane Research Technology Center (AMTEC) Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor Bahru, Malaysia
Kusworo, Tutuk Djoko
chemical engineering department diponegoro university
Array
This study is performed primarily to investigate the effect of polymer concentration of polyimide/polyethersulfone (PI/PES) blending on the gas separation performance of hybrid mixed matrix membrane. In this study, PI/ (PES)–zeolite 4A mixed matrix membranes were casted using dry/wet phase inversion technique. The efefct of PI/PES concentrations and zeolite loading on the dope solution were investigated for gas separation performance. The results from the Field Emission Scanning Electron Microscopy (FESEM) analysis confirmed that polymer concentration and zeolite loading was affected the morphology of membrane and gas separation performance. ‘Sieve-in-a-cage’ morphology observed the poor adhesion between polymer and zeolite at higher zeolite loading. The gas separation performance of the mixed matrix membranes were relatively higher compared to that of the neat polymeric membrane.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6684
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1308
2012-01-14T21:23:30Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Editor board
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
editor board
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1308
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6175
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Physico-Chemical Characterization Of Maluku Nutmeg Oil
Marzuki, Ilyas
Faculty of Agriculture, Pattimura University,Campus Poka, Ambon
Joefrie, Bintoro
Department of Agronomy, Faculty of Agriculture, Bogor Agriculture University, Darmaga, Bogor
A. Aziz, Sandra
Department of Agronomy, Faculty of Agriculture, Bogor Agriculture University, Darmaga, Bogor
Agusta, Herdhata
Department of Agronomy, Faculty of Agriculture, Bogor Agriculture University, Darmaga, Bogor
Surahman, Memen
Department of Agronomy, Faculty of Agriculture, Bogor Agriculture University, Darmaga, Bogor
Array
The essential oil of Banda nutmeg was extracted using hydro-distillation method to characterize their essential oil and volatile components. Banda, Ambon, and Luhu nutmegs were chosen as sample ecotypes. Nutmeg oils were subjected to physico-chemical and GC-MC analyses. Results indicated that nutmeg from the three ecotypes produced uncolored oils with the contents in mature seed were 11.69, 11.92, and 9.99%, respectively. Meanwhile those of immature seeds contained 13.32, 11.99, and 11.03% respectively. Furthermore, the physico-chemical of the oil are specific gravity 0.897 to 0.909 g/ml; refraction index, 1.489 to 1.491; and optical rotation, +11.40 to +16,30.GC-MS analysis suggested that essential oils Maluku nutmegs composed of 28 to 31 components and also showed that nutmeg from Banda comprised 52.8% monoterpene hydrocarbon (MH), 21.11% oxygenated monoterpene (OM), and 18,04% aromatic compound (AC); Ambon’s 45.12% MH, 24.51% OM, and 16.97% AC; and Luhu’s 56.06% MH, 27.34% OM, and 13.62% AC. Further analysis indicated that there were four important volatile oils fractions in nutmegs i.e. myristicin, elemicin, safrole, and eugenol. Maluku nutmeg contain 5.57 to 13.76% myristicin and 0.97 to 2.46% safrole. In conclusion, nutmeg oil shows a high stability in all physico-chemical properties. Nutmeg from Banda ecotype has the highest content in myristicin.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6175
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4058
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121013 2012 eng "
2302-5743
2086-5023
dc
Growth With of Alfalfa Mutant in Different Nitrogen Fertilizer and Defoliation Intensity
Slamet, Widyati
Faculty of Animal Agriculture, Diponegoro University Semarang
Sumarsono, S.
Anwar, S.
Widjajanto, D.W.
The research was conducted to evaluate growth of alfalfa mutan (plant height increment, number of leaves and dry matter production) in different Nitrogen Fertilizer and defoliation intensity. The design used was randomized block design 4x2 factorial with 3 replications. The first was dosage of Nitrogen fertilizerNitrogen (0, 30, 60 and 90 kg N / ha), the second factor was defoliation intensity (5 and 10 cm). Variables observed alfalfa growth (plant height increment, number of leaves, the production of dry matter (DM) forage). The results showed that different N fertilization did not affect the growth of alfalfa mutants. Defoliation intensity affectedmnumber of leaves and DM production of alfalfa mutant. Fertilization to 90 kg N / ha has not affected the growth and defoliation intensity 10 cm gave better growth on alfalfa mutant.
[Keywords: alfalfa mutant; Nitrogen fertilizer; defoliation; growth]
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4058
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7265
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Soil Erosion Assessment of The Post-Coal Mining Site in Kutai Kartanagera District, East Kalimantan Province
Zulkarnain, Zulkarnain
Agricultural Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Array
Besides of its positive economic impact, mining activity has negative impacts to the sustainability of community development and livelihoods as mining reclamation can’t restore the land condition to its original state. The objective of this study was to determine the main factor that caused soil erosion induced in post-coal mining and defined reclamation activity that caused soil erosion. The observed parameters were site reclamation age of each companies, soil physical properties (density, texture, permeability, organic material and soil structure), rainfall rate, soil chemical properties, land cover and age of re-vegetation, plant cover. Analysis was carried out to determine the magnitude of erosion at each site unit, tolerable erosion and potential erosion level. Adequate reclamation action with good vegetative cover could be seen from erosion magnitude at five year reclamation age i.e. 1.7 ton/ha/ year- which lower than tolerable erosion i.e. 5.4 ton/ha/year. While inadequate reclamation action could be seen from erosion magnitude at nine year age of reclamation i.e. 201.1 ton/ha/year1 which higher than tolerable erosion i.e. 15.1 ton/ha/ year1. The erosion magnitude at the four month of reclamation age was 4.966,3 ton/ha with tolerable erosion was 5.3 ton/ha. The erosion magnitude that occurs in post-mining site was due to soil compaction that lowering soil permeability rate leading to slow growing of cover crop. This condition made the soil wasn’t covered from raindrop and water run-off. In order to improve the soil condition of post-mining site into productive land, legume cover crop was recommended to be planted.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7265
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4262
2012-12-31T07:26:51Z
ijse:ART
nmb a2200000Iu 4500
"121211 2012 eng "
2302-5743
2086-5023
dc
Moving Object Tracking and Avoidance Algorithm for Differential Driving AGV Based on Laser Measurement Technology
Pratama, Pandu Sandi
Department of Mechanical and Automotive Eng., Pukyong National University
Yongdang Campus, Sinseon-ro, Nam-Gu, Busan 608-739, Korea
Kwun Jeong, Sang
Sil Park, Soon
Bong Kim, Sang
This paper proposed an algorithm to track the obstacle position and avoid the moving objects for differential driving Automatic Guided Vehicles (AGV) system in industrial environment. This algorithm has several abilities such as: to detect the moving objects, to predict the velocity and direction of moving objects, to predict the collision possibility and to plan the avoidance maneuver. For sensing the local environment and positioning, the laser measurement system LMS-151 and laser navigation system NAV-200 are applied. Based on the measurement results of the sensors, the stationary and moving obstacles are detected and the collision possibility is calculated. The velocity and direction of the obstacle are predicted using Kalman filter algorithm. Collision possibility, time, and position can be calculated by comparing the AGV movement and obstacle prediction result obtained by Kalman filter. Finally the avoidance maneuver using the well known tangent Bug algorithm is decided based on the calculation data. The effectiveness of proposed algorithm is verified using simulation and experiment. Several examples of experiment conditions are presented using stationary obstacle, and moving obstacles. The simulation and experiment results show that the AGV can detect and avoid the obstacles successfully in all experimental condition.
[Keywords— Obstacle avoidance, AGV, differential drive, laser measurement system, laser navigation system].
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4262
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7920
2015-01-11T12:13:02Z
ijse:BACK
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Instruction for Authors
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Instruction for Authors
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7920
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4743
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130416 2013 eng "
2302-5743
2086-5023
dc
Utility of Rice Bran Mixed with Fermentation Extract of Vegetable Waste Unconditioned as Probiotics from Vegetable Market
Setya Utama, Cahya
Diponegoro University Semarang, Central Java
Suthama, Nyoman
Sulistiyanto, Bambang
Etza Setiani, Bhakti
Array
The aimed of the study was to enhance utilization of Lactobacillus Sp. and Saccharomyces sp. as starter for fermentation of waste cabbage and green mustard to enhance the utility of rice bran as an ingredient of poultry feed. The first stage of the study was to characterize the extract of fermented wasted vegetable with difference concentration of glucose and different period of time for incubation. Completely randomized design using 3 x 3 factorial with three replications was used for the first stage of the study. The second stage of the study was to evaluate the effectiveness of the extract of fermented wasted vegetable to improve the quality and utility of rice bran. Completely randomized design with four treatments and 4 replications. The third stage of the study was to obtain the value of nitrogen, calcium and phosphorus retention, as well as metabolic energy of rice bran after fermentation in broiler hatching. The third stage analysis was conducted by t-test analysis. The results of the study showed that the microbial characteristics on the extract of fermented wasted vegetable in two days incubation time and 2% concentration of glucose was able to produce pH of 3.80, log of total lactic acid bacteria 7.38 and types of microbes that grow predominantly were Lactobacillus Sp. and Saccharomyces Sp. The effectiveness of the extract fermented wasted vegetable for the fermentation of rice bran were shown in additional concentration of extract wasted vegetable of 40% with a moisture content of toluene 65.24%, 13.36% ash, 14.93% protein, 7.61% crude fat, 12.39% crude fiber, nitrogen free extract material (NFE) 51.59% and 0.07% biomass. The biological value and the availability of fermented rice bran were higher than unfermented rice bran on the broiler chickens after hatching. The values were justified from nitrogen, calcium and phosphorus retention also metabolic energy. The study concluded that the benefits and utility of rice bran could increased by fermentation using 40% extract of fermented wasted vegetable from vegetable market with 2% glucose concentration and 2 days incubation time.
Doi: 10.12777/ijse.4.2.2013.97-102
[How to cite this article: Utama, C.S., Suthama, N., Sulistiyanto, B., Setiani, B.E. (2013). Utility of Rice Bran Mixed with Fermentation Extract of Vegetable Waste Unconditioned as Probiotics from Vegetable Market. International Journal of Science and Engineering, 4(2),97-101. Doi: 10.12777/ijse.4.2.2013.97-102]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4743
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/7263
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
STUDY ADSORPTION DESORPTION OF MANGANESE(II) USING IMPREGNATED CHITIN-CELLULOSE AS ADSORBENT
Lesbani, Aldes
Department of Chemistry, FMIPA, Sriwijaya University
Turnip, Ema Veronika
Department of Chemistry, FMIPA, Sriwijaya University
Mohadi, Risfidian
Department of Chemistry, FMIPA, Sriwijaya University
Hidayati, Nurlisa
Department of Chemistry, FMIPA, Sriwijaya University
Array
Abstract- Study adsorption desorption of manganese(II) using impregnated chitin-cellulose as adsorbent has been carried out. Chitin was extracted from snail shell and cellulose isolated from rice straw. Chitin and cellulose were impregnated using thiourea as impregnant agent. Characterization of chitin and cellulose was performed using FTIR spectroscopy, determination of water content, and ash content, while impregnated chitin-cellulose was characterized using FTIR spectrophotometer and X-Ray diffractometer. The adsorption of Mn(II) on impregnated chitin-cellulose was studied through determination of adsorption time and the influence of Mn(II) concentration, while desorption was carried out sequentially using various reagents. The results shown that chitin and cellulose from extraction processes are has similar FTIR spectrum compared to chitin and cellulose standard. The FTIR spectrum of impregnated chitin-cellulose shows both vibration of chitin and cellulose appeared and indicated successfully impregnate. These results were also equal to XRD pattern analysis. The water and ash contents of chitin are 0.038% and 0.043 while for cellulose are 0.184% and 0.165%, respectively. The adsorption of Mn(II) on chitin and cellulose are quite similar kinetically, while adsorption of Mn(II) on impregnated chitin-cellulose is higher at the same time with chitin and cellulose. In the low concentration of Mn(II), adsorption phenomena are similar on chitin, cellulose, and impregnated chitin-cellulose. Desorption process of Mn(II) on the adsorbents shows sodium etilenediamine tetra acetate able to desorp Mn(II) up to 68% higher than other reagents.
Keywords: Manganese(II), Chitin, Cellulose, Impregnated Chitin-Cellulose
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7263
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/5329
2013-08-07T10:00:27Z
ijse:EDT
nmb a2200000Iu 4500
"130615 2013 eng "
2302-5743
2086-5023
dc
Front Cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Front Cover
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5329
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/9527
2015-11-20T09:43:11Z
ijse:ART
nmb a2200000Iu 4500
"150715 2015 eng "
2302-5743
2086-5023
dc
The role of fluoxetine on macrophage function in chronic pain (Experimental study in Balb/c mice)
Pudjonarko, Dwi
Department of Neurology, Faculty of Medicine, Diponegoro University
Dharmana, Edi
Department of Parasitology, Faculty of Medicine, Diponegoro University
Hartanto, OS
Department of Neurology, Faculty of Medicine, Sebelas Maret University
Array
Chronic pain raises stress conditions such as depression that can lower the cellular immunity. Fluoxetine is an antidepressant used as an adjuvant in pain management but no one has been linked it with the body immune system. The objectives of this research were to proof the benefits of fluoxetine in preventing degradation of macrophage function in chronic pain by measuring the macrophage phagocytic index , macrophage NO levels and the liver bacterial count in BALB/c mice infected with Listeria Monocytogenes.A Post Test - Only Control Group Design was conducted using 28 male mice strain BALB /c, age 8-10 weeks. The control group (C), mice got the same standard feed as the other groups. Chronic pain group (P), mice were injected with 20μL intraplantar CFA on day-1. Pain + fluoxetine early group (PFE) were treated with P + fluoxetine 5 mg / kg ip day-1, the 4th, the 7th and the 10th, while the Pain + fluoxetine late group (PFL) were treated with P + fluoxetine 5 mg / kg ip on day 7th and 10th. All mice were injected with 104 live Listeria monocytogenes iv on day 8th. Termination was performed on day 13th. Differences within groups were analyzed using One-way ANOVA and Kruskall Wallis, whereas the correlation of variables were analyzed using Pearson's product moment. The experimental results showed that The macrophage phagocytic index and NO macrophage level (pg/mL) in PFE group(2,24±1,013; 0,24±0,239) was higher than than P group (1,68±0,920; 0,21±0,263) and there was no different in the macrophage phagocytic index of PFE group compared to C group (p=0,583; p=0,805). In PFL group (4,32±1,459; 0,54±0,294) the macrophage phagocytic index as well as NO macrophage level (pg/mL) was higher than P group (1,68±0,920; 0,21±0,263) with p=0,002; p=0,017. P group Bacterial count (log cfu/gram) (2,30±0,849) was significantly higher than C group(1,15±0,223) (p=0,007), while PFE group bacterial count (1,96±0,653) and PFL group bacterial count (1,84±0,403) compared to C (1,15± 0,223) was not significantly different (p=0,093; p=0,220). Correlation found between macrophage phagocytic index and macrophage NO (r=0,515, p=0,005).Macrophage phagocytic index and macrophage NO showed no correlation with bacterial count (r=-0,051, p=0,798; r=-0,071, p=0,719).It can be concluded that fluoxetine significantly incerases macrophage phagocytosis index and macrophages NO level in mice with chronic pain, on the other hand fluoxetine decreases liver bacterial count . There is a positive correlation between macrophage phagocytosis index and macrophages NO level, while no correlation observed among two variables with mice liver bacterial count in chronic pain.
Chemical Engineering Diponegoro University
2015-11-07 22:26:00
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International Journal of Science and Engineering; Vol 9, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/5597
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Characteristics of Red Algae Bioplastics/Latex Blends under Tension
Machmud, M. Nizar
1Laboratory of Materials Engineering, Department of Mechanical Engineering, Faculty of Engineering, University of Syiah Kuala, Jln. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh
Fahmi, Reza
2Former undergraduate student at Department of Mechanical Engineering Faculty of Engineering, University of Syiah Kuala, Jln. Tgk. Syech Abdurrauf No. 7, Darussalam, Banda Aceh
Abdullah, Rohana
4Post Graduate Student at Post Graduate School of Agriculture, University of Padjadjaran, Jl. Raya Bandung Sumedang Km. 21, Jatinangor
Kokarkin, Coco
5Ministry of Marine Affairs and Fisheries Republic of Indonesia, Directorate General of Aquaculture, Brackishwater Aquaculture Development Centre Ujung Batee, Jln. Krueng Raya Km. 16, Ujung Batee, PO. BOX. 46, Banda Aceh
Array
Cassava, corn, sago and the other food crops have been commonly used as raw materials to produce green plastics. However, plastics produced from such crops cannot be tailored to fit a particular requirement due to their poor water resistance and mechanical properties. Nowadays, researchers are hence looking to get alternative raw materials from the other sustainable resources to produce plastics. Their recent published studies have reported that marine red algae, that has been already widely used as a raw material for producing biofuels, is one of the potential algae crops that can be turned into plastics. In this work, Eucheuma Cottonii, that is one of the red alga crops, was used as raw material to produce plastics by using a filtration technique. Selected latex of Artocarpus altilis and Calostropis gigantea was separately then blended with bioplastics derived from the red algae, to replace use of glycerol as plasticizer. Role of the glycerol and the selected latex on physical and mechanical properties of the red algae bioplastics obtained under a tensile test performed at room temperature are discussed. Tensile strength of some starch-based plastics collected from some recent references is also presented in this paper
Doi: 10.12777/ijse.5.2.81-88
[How to cite this article: Machmud, M.N., Fahmi, R., Abdullah, R., and Kokarkin, C. (2013). Characteristics of Red Algae Bioplastics/Latex Blends under Tension. International Journal of Science and Engineering, 5(2),81-88. Doi: 10.12777/ijse.5.2.81-88
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5597
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/11574
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160114 2016 eng "
2302-5743
2086-5023
dc
Optimation Budgeting DistributionModel for Maintaining Irrigation Scheme
Edhisono, Sutarto
Civil Engineering Department, Faculty of Engineering, Diponegoro University
Hadihardaja, Iwan K.
Water Resources Laboratory, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung
Suripin, Suripin
Civil Engineering Department, Faculty of Engineering, Diponegoro University
Array
Utilization of palm oil by-product such as palm fronds, leaves, empty fruit bunches (EFB), fiber fruit juice (FFJ), palm to maintenance of irrigation structures are the activities carried out routinely in irrigation areas in order to obtain optimum performance. Required costs of maintenance is provided by government based on the commanding area of irrigation area without taking into account the characteristics of each irrigation area. On the other hand the fund which is provided by the government for the purpose of maintenance of irrigation assets amounting to 40 % of the required, so that necessary special tips is needed to take optimum result of the limited funds to choose which priority irrigation structures. While this selection irrigation structures are maintained/repaired just based on policy of decision makers only. The purpose of this research was to develop an optimization model for distribution of irrigation maintenance cost allocation for the irrigation areas and make selection to priority irrigation structures for maintenance in order to get optimum results. Location of the research is the Pondok Irrigation Area (IA) which located in East Java province. This irrigation area is part of the region Central River Region Solo. Pondok IA. consist of 4 irrigation areas, namely: Dero IA., Sambiroto IA., Padas IA. And Plesungan IA. The study was conducted in two stages : Stage 1 with the aim of allocating the cost of maintenance for each irrigation area in Pondok IA., which are Dero IA., Sambiroto IA., Padas IA. And Plesungan IA. Stage 2 with the aim of making choice for the priority irrigation structures are maintained/repaired on Dero IA., Sambiroto IA., Padas IA. And Plesungan IA. The method used is multi criteria analysis by Analytical Hierarchy Process (AHP) with using a soft ware expert choice 2000. To complete Stage 1used multiple criteria analysis of three levels, with the top level is Pondok IA., then the second level is below, named criterias which consists of four criterias, namely: Level of Urgency, Productivity, Commanding Area and Cost with in ratio of 4: 3: 2: 1. The lowest level is named alternatives which consisted of four irrigation areas, namely Dero IA., Sambiroto IA., Padas IA., and Plesungan IA. The data used in this research is PAI Solo data in 2011. Stage 2 of this study is selection priority structures in each irrigation area for maintenance / repair. In this analisis is used multi-criteria analysis also, where as the top level is the name of each irrigation area. As criteria there are three criterias, namely: Productivity, Service area, Cost of structure with the weight of each: 3: 2: 1. As the lower level is alternative, which here are the name of the proposed structures. The proposed structures and their specifications are taken from PAI Bengawan Solo data in 2011. The structures which analysed are the structures which in very urgent and urgent condition only. The result is a list of priority irrigation structures which would be maintained from each irrigation area. Results of the research Stage 1 : From costs available for Pondok IA. IDR 749,880,000.-. Dero IA., receive IDR 216,715,320.-; Sambiroto IA., receive IDR 207,716,760.-; Padas IA., receive IDR 173,222,280.-; and Plesungan IA., receive IDR 151,475,760.-. Results of the Stage 2 study is priority structures which would be maintained on each irrigation areas, namely: Dero IA., the name of the structures are: SSDOKa11, BDOKi1, BDOKa6, BDOKa15, SSDOKa14, SSDOKa15, SSDOKa17, SSDOKi1, SSDOKi2
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
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https://ejournal.undip.ac.id/index.php/ijse/article/view/11574
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
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oai:ojs.ejournal.undip.ac.id:article/6012
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
The Influence of Malt Extraction Adding to UF Fresh Low Fat Cheese on Its Textural Properties
Shafiei, Zahra
Department of Food Science and Technology, Faculty of Agriculture, Islamic Azad University, Shahrekord Branch, Shahrekord
Hojjatoleslamy, Mohammad
Department of Food Science and Technology, Faculty of Agriculture, Islamic Azad University, Shahrekord Branch, Shahrekord
Soha, Sahel
Researcher of Institute of Standards and Industrial Research of Iran, Arak
Shariati, Mohammad Ali
3Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran
Array
Today , demands for reduced fat products such as reduced fat cheeses is growing as it has shown in other food products , however high nutritional value of milk fat as a functional food can’t be ignored. This study deals with investigation of adding malt extract ( in 4 different concentration 0.075 , 0.1 , 0.15 and 0.2 % ) to ultra filtered cheese and comparing them with 2 control including a sample produced of milk containing 3.5 % fat and a 0.93 % fat and their rheological and textural properties evaluated at 3 , 20 , 40 and 60 days. Results indicate reduction of texture properties revealed. Rheological analysis exhibited the texture improvement by adding malt extraction; therefore this product can be use an additive to ultra filtered cheese to enhance its texture.
[How to cite this article: Shafiei, Z., Hojjatoleslami, M., Soha, S., and Shariati, M.A. 2014. The Influence of Malt Extraction Adding to UF Fresh Low Fat Cheese on Its Textural Properties. International Journal of Science and Engineering, 6(1):57-60. Doi: 10.12777/ijse.6.1.57-60
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6012
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1251
2012-02-12T01:38:24Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Cover
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Department of Chemical Engineering, Diponegoro University Semarang, Central Java
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Chemical Engineering Diponegoro University
2010-07-01 00:00:00
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International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
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oai:ojs.ejournal.undip.ac.id:article/6670
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
The Nutrient Potency of Palm Oil Plantation and Mill’s By-product Processed with Amofer Technology as Ruminant Feed
Mayulu, Hamdi
Animal Sciences Department of Agricultural Faculty, Mulawarman University
Jl. Pasir Belengkong Kampus Gunung Kelua Samarinda
Array
By-product derived from palm oil plantation and mill is very potential for energy and protein source for ruminant feed. However, it is still underutilized due to low content of crude protein (CP) with high crude fiber (CF). Ammoniation or fermentation technology could optimize the quality of by-product by increasing digestibility, reducing CF and increasing CP content. The objective of this research was to determine the nutrient and potency value of palm oil plantation and mill’s by-product applied with amofer technology for ruminant feed. Sample was prepared in two methods: 1) sample without amofer application, 2) sample with amofer application under anaerobic method and incubated for 18 days. Ammoniation was carried out by adding urea of 3% from the total material and then incubated for nine days. At the ninth day, some microorganisms starter i.e. cellulolytic, amillolytic and proteolytic were added by 1% of the total material. Proximate analysis was carried out in laboratory to examine the nutrient value. The crude protein content at each part of feed material before and after amofer treatment was follow: palm midrib: 3.16%:17%; palm leaves 6.53%:26.51%; empty fruit bunch 7.01%:1673%; palm pressed fiber 5.56%:16.00%. While the crude fiber at each part of feed material was: palm midrib 37.85%:30.86%; palm leaves 30.39%:24.41%; EFB 40.22%:34.98%; PPF 50.39%: 41.70%. The application of amofer could increase the amount of feed material (ton/ha/y): dry matter (DM) 14.82:15.89; CP 0.79:2.87; total digestible nutrient (TDN) 7.63:8.5. Moreover, amofer application could also increase the nutrient content of palm oil plantation and mill’s by-product by increasing CP and reducing CF. This increasing was also followed by the increasing of DM, CP, and TDN which indicated that those feed sources were recommended as ruminant feed material
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
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International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1273
2012-01-14T21:23:30Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Authors guideline
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Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Authors guideline
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
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International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
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oai:ojs.ejournal.undip.ac.id:article/6882
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Environmental Impact Assessment of a Flood Control Channel in Sfax City, Tunisia
Dahri, Noura
University Of Sfax, Tunisia
Atoui, Abdelfattah
Ministère de l'Equipement, Direction de l'Hydraulique Urbaine (DHU), Avenue Hadi Chaker Sakiet Ezzit,
Sfax 3002
Abida, Habib
Geology Department, Faculty of Science, Sfax University – Tunisia
Array
The objective of this study is to evaluate water and sediment quality in the southern branch of a flood control channel in Sfax city, as well as its neighboring sites. This artificial channel, located 4km away from downtown Sfax, was implemented in 1984 to protect the city against floods. Even though it contributed to reduce the harmful flood effects, this channel also resulted in new environmental problems that may cause a public health threat. Indeed, artificial surfaces pose a greater risk of infection due to bacteria, fungi and other microorganisms.
A total of 19 water samples (9 from the channel and 10 from groundwater wells) were collected in a dry period and analyzed in the laboratory. Furthermore, 12 sediment samples were taken from the bottom of the channel. Water quality data were used to examine the spatial variability of the different water quality parametrs. The resultant maps revealed an important contamination and illustrated that the degree of contamination differs from one site to another, depending on the distance from the pollution source (industrial, domestic or agricultural activity), the depth of the groundwater table and also the maintenance of the well and its surroundings.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
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International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/3401
2012-04-29T18:09:27Z
ijse:BACK
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Back Cover Section
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Department of Chemical Engineering, Diponegoro University Semarang, Central Java
This cection contain instruction for Authors
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
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International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
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oai:ojs.ejournal.undip.ac.id:article/7038
2015-01-12T20:27:32Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Assessment of Nelumbo nucifera and Hydrilla verticillata in the treatment of pharmaceutical industry effluent from 24 Parganas, West Bengal
Chatterjee, Shamba
Assistant Professor
Department of Biotechnology
Haldia Institute of Technology
(Affiliated to West Bengal University of Technology)
Haldia-721657
West Bengal
India http://www.hithaldia.in
Array
Modern day technologies employed in industrialization and unhygienic lifestyle of mankind has led to a severe environmental menace resulting in pollution of freshwater bodies. Pharmaceutical industry effluents cause eutrophication and provide adequate nutrients for growth of pathogenic bacteria. This study has been conducted with aquatic plants water lotus (Nelumbo nucifera) and hydrilla (Hydrilla verticillata) with an novel aim to treat pharmaceutical industry effluents showing the outcome of the experiments carried out with the effluents collected from rural areas of 24 Parganas, West Bengal, India. Determination of pH, solid suspend, BOD5, NH3-N, MPN and coliform test were used for this notioned purpose. Pharmaceutical waste effluent water treated with water lotus showed less pH, solid suspend, DO, BOD, NH3-N, MPN and coliform bacteria than hydrilla treatment when compared to the control. In conclusion, water lotus is found to be more efficient in treatment of pharmaceutical industry effluent waste water than hydrilla.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
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International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/4220
2012-12-06T23:25:49Z
ijse:EDT
nmb a2200000Iu 4500
"121205 2012 eng "
2302-5743
2086-5023
dc
Front Cover
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Department of Chemical Engineering, Diponegoro University Semarang, Central Java
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Chemical Engineering Diponegoro University
2012-10-13 21:45:01
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International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
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oai:ojs.ejournal.undip.ac.id:article/7674
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Reliability based design optimization of concrete mix proportions using generalized ridge regression model
Aggarwal, Rachna
M.L.N.College, Yamunanagar
Kumar, Maneek
Thapar University, Patiala
Sharma, R.K.
Thapar University, Patiala
Sharma, M.K.
Thapar University, Patiala
Array
This paper presents Reliability Based Design Optimization (RBDO) model to deal with uncertainties involved in concrete mix design process. The optimization problem is formulated in such a way that probabilistic concrete mix input parameters showing random characteristics are determined by minimizing the cost of concrete subjected to concrete compressive strength constraint for a given target reliability. Linear and quadratic models based on Ordinary Least Square Regression (OLSR), Traditional Ridge Regression (TRR) and Generalized Ridge Regression (GRR) techniques have been explored to select the best model to explicitly represent compressive strength of concrete. The RBDO model is solved by Sequential Optimization and Reliability Assessment (SORA) method using fully quadratic GRR model. Optimization results for a wide range of target compressive strength and reliability levels of 0.90, 0.95 and 0.99 have been reported. Also, safety factor based Deterministic Design Optimization (DDO) designs for each case are obtained. It has been observed that deterministic optimal designs are cost effective but proposed RBDO model gives improved design performance.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/4583
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130313 2013 eng "
2302-5743
2086-5023
dc
Physical and Mechanical Properties of Palm Oil Frond and Stem Bunch for Developing Pruner and Harvester Machinery Design
Ismi Intara, Yazid
Agro-technology Department of Agricultural Faculty, Mulawarman University
Mayulu, Hamdi
Radite, P.A.S.
Array
A development of oil palm pruner and harvester machinery design implemented in the field still faces a problem due to the lack of effective and efficient design which is need to be solved. It was noted that in order to develop the design, an early data and information of physical and mechanical properties of palm oil frond and stem fruits is critically important. The objective of the research was to obtain the physical and mechanical properties of palm oil frond and stem in order to develop the design of pruner and harvester machinery. The result showed that tool machinery was been advantageous by the physical properties of the plant i.e. the total weight of frond and leaf which enable to support the cutting process. The average of total weight of frond and leaf was 16.8 kg. The diagonal cutting trajectory was been more advantageous because of total weight and frond shape toward to the different of the plant tissue area. The measurement result shows that cutting curve follows the time required for cutting. The comparison among cutting curve shows differences in cutting thickness or length. In this case, the thickness is linear with cutting time. Besides, those curves show differences at the height which determine the maximum value of tested material cutting resistance. Alternative solution for machinery development design is pruner-harvester for height plant below 6 m and among 6 to 12 m. For below 6 m, pruner-harvester was designed by incorporating motor as power source and cutter-disc as the knife cutter. That condition was relied on that estate which was maintenance intensively commonly used cutter-disc. Pruner-harvester above 6 m and up to 12 m was improved based on manual egrek-designed by adding fresh fruit bunch alley supply glide in order to keep the fruits still in intact form. The consideration was based on affectivity and efficiency. It also considers homogenous ecological of palm oil plant which should be maintained to reduce global warming effect. Information obtained in this research could become positive consideration and alternative solution to provide problem solvingat early development design of palm oil pruner and harvester machinery.
Doi: http://dx.doi.org/10.12777/ijse.4.2.2013.69-74
[How to cite this article: Intara, Y.I., Mayulu, H., and Radite, P.A.S. (2013). Physical and Mechanical Properties of Palm Oil Frond and Stem Bunch for Developing Pruner and Harvester Machinery Design. International Journal of Science and Engineering, 4(2),69-74. Doi: http://dx.doi.org/10.12777/ijse.4.2.2013.69-74]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4583
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8225
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Codition of Coral Reef at Teluk Pandan Sub-District East Kutai District
Syahrir R, Muhammad
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Jayadi, Achmad
Marine and Fisheries Office of East Kutai District, JalanSosial, Government Offices Complex of Bukit Pelangi, Sangatta, East Kutai District, East Kalimantan
Adnan, Adnan
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Yasser MF, Muhammad
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Hanjoko, Tedy
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Array
Coral reef of TelukPandan Sub-district East Kutai District still low in both monitoring and management, thus also poorly in coral reef database. This research purpose was to obtain the data of coral reef condition and distribution description in this sub-district. Research was held on October 2013 at six observation stations using lifeform line intercept transect survey method. The coral condition estimation was based on live coral cover (LC) and hard coral mortality index (HCM). Coral reef distribution and wide were estimated by satellite image Landsat 7 ETM+ processing and direct field tracking using GPS. There estimated ± 618.63 ha of coral reef area consist of fringing and patch reef formation type. Live coral cover vary 2.1-67.8% or categorized “poor” to “good” reef condition and in average LC = 38.1% (“fair/moderate” condition). Hard coral morality (HCM) index ranged 0.14 – 0.8 and in average 0.31.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8225
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5112
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Corrosion Behavior of Ni3(Si,Ti) in Hydrochloric Acid Solution
Priyotomo, Gadang
Research Center for Metallurgy, Indonesian Institute of Sciences
Kaneno, Yasuyuki
Array
The corrosion behaviour of the intermetallic compounds Ni3(Si,Ti) (L12: single phase), has been investigated using an immersion test, electrochemical method, scanning electron microscope in 0.5 kmol/m3 HCl at 303 K. In addition, the corrosion behaviour of austenitic stainless steel type 304 and C276 was studied under the same experimental conditions as references. It was found that the intergranular attack was observed for Ni3(Si,Ti) in the immersion test. From the immersion test and polarization curves, Ni3(Si,Ti) had the moderate corrosion resistance, while the corrosion resistances of C 276 and type 304 were the highest and the lowest. Ni3(Si,Ti) and type 304 were difficult to form a stable passive film, but not for C276. A further experiment must be conducted to clarify the stability of film for Ni3(Si,Ti) in detail.
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5112
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8823
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Correlation of Folic Intake and Internal Carotid Artery Intima-Media Thickness Changes In Post Ischemic Stroke Patients
Tugasworo, Dodik
Department of Neurology Faculty of Medicine, University of Diponegoro
Pudjonarko, Dwi
Department of Neurology Faculty of Medicine, University of Diponegoro
Latifah, Latifah
Department of Neurology Faculty of Medicine, University of Diponegoro
Array
The thickness of the carotid artery intima media / intima-media thickness (IMT) is one of atherosclerosis markers. Atherosclerosis is one of the causes of ischemic stroke. Some studies suggest that low folate intake is predicted to affect the atherosclerotic process, but this remains controversial. Our objective is to analyze the relationship between folate intake with changes in the internal carotid artery IMT after ischemic stroke patients.The study is one group pretest posttest design with 72 post ischemic stroke subjects from neurology polyclinic of Kariadi Hospital, from June to December 2013. Folate intake was measured by Food Frequency Questionnaire and the internal carotid artery IMT by duplex ultrasonography. Measurements were taken at two periods with 6 months interval. Other factors that affect atherosclerosis consisting of age, obesity, hypertension, dyslipidemia, diabetes mellitus. The analysis in this study using Spearman correlation, chi-square and logistic regression. Resultwas significant if the p value were <0.05.There were 44 male subjects (61.1%) and 28 female subjects (38.9%). The mean age was 61.6 (SD = 7.99) years. The mean intake of folate was 178.10 (SD = 38.875) mg / day. Median serum folic acid level 8.43 (4.96 to 55.01) NML / L. The mean change in ICA IMT was 0.10 (SD = 0.156) mm. Folate intake was not correlated with serum levels of folic acid. Serum folic acid levels are not correlated with changes in the internal carotid artery IMT. There was correlation between the risk factors of age, BMI, hypertension, diabetes and dyslipidemia with changes in the internal carotid artery IMT.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8823
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5592
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Surface Morphology Study of Nanostructured Lead-Free Solder Alloy Sn-Ag-Cu Developed by Electrodeposition: Effect of Current Density Investigation
Mohd Yusof, Sakinah
Faculty of Chemical Engineering, Universiti Teknologi MARA
Hadi, Abdul
Faculty of Chemical Engineering, Universiti Teknologi MARA
Jai, Junaidah
Faculty of Chemical Engineering, Universiti Teknologi MARA
Array
Nanostructured lead-free solder Sn-Ag-Cu (SAC) was developed by electrodeposition method at room temperature. Electrolite bath which comprised of the predetermined quantity of tin methane sulfonate, copper sulfate and silver sulfate were added sequentially to MSA solution. The methane sulphonic acid (MSA) based ternary Sn-Ag-Cu bath was developed by using tin methane sulfonate as a source of Sn ions while the Cu+ and Ag+ ions were obtained from their respective sulfate salts. The rate of the electrodeposition was controlled by variation of current density. The addition of the buffer, comprising of sodium and ammonium acetate helped in raising the pH solution. During the experimental procedure, the pH of solution, composition of the electrolite bath, and the electrodeposition time were kept constant. The electrodeposited rate, deposit composition and microstructure were investigated as the effect of current density. The electrodeposited solder alloy was characterized for their morphology using Field Emission Scanning Electron Microscope (FESEM). In conclusion, vary of current density will play significant role in the surface morphology of nanostructured lead-free solder SAC developed.
Doi: 10.12777/ijse.5.2.51-55
[How to cite this article: Yusof, S.M., Hadi, A., and Jai, J. (2013). Surface Morphology Study of Nanostructured Lead-Free Solder Alloy Sn-Ag-Cu Developed by Electrodeposition: Effect of Current Density Investigation. International Journal of Science and Engineering, 5(2):51-55. Doi: 10.12777/ijse.5.2.51-55
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5592
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8538
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
dc
Design of Level Control in A 10 L Pure Capacitive Tank: Stability Analysis and Dynamic Simulation
Hermawan, Yulius Deddy
Department of Chemical Engineering
Faculty of Industrial Technology
UPN "Veteran" Yogyakarta https://ydhermawan.wordpress.com/
Reningtyas, Renung
Department of Chemical Engineering
Faculty of Industrial Technology
UPN "Veteran" Yogyakarta
Kholisoh, Siti Diyar
Department of Chemical Engineering
Faculty of Industrial Technology
UPN "Veteran" Yogyakarta
Setyoningrum, Tutik Muji
Department of Chemical Engineering
Faculty of Industrial Technology
UPN "Veteran" Yogyakarta
Array
The open loop experiment of a 10 L pure capacitive tank has been successfully done in laboratory. The square tank connected with a pump was designed for investigation in laboratory, and the water was chosen as a fluid with its input volumetric rate of fi(t) [cm3/min]. The output volumetric rate of fo(t) can be adjusted by changing the pump voltage of vpu(t) [volt]. The open loop experiment has given the steady state parameters, and it could then be used for calculating the dynamic parameters. This study has proposed the level control configuration of a 10 L pure capacitive tank system; liquid level in the tank h(t) was kept constant by manipulating the pump voltage of vpu(t); and the input water volumetric rate of fi(t) was considered as a disturbance. The P-only-control was implemented to control the level. Purposes of this study are to analyze the stability of the closed loop responses and to do the closed loop dynamic simulation. The closed loop mathematical model was solved analytically with Laplace Transform, and Routh-Hurwitz criterion was chosen to analyze the stability. Since the closed loop model was found in the 2nd order system, the response depended on the value of the damping coefficient (ζ), in which it was really affected by the controller gain (Kc). In order to examine the control configuration, the input water volumetric rate disturbance (with amount of ±14%) was made based on step function. Based on the stability analysis, a stable response would be achieved if the controller gain is negative (Kc<0) and the damping coefficient is positive (ζ>0). Based on the dynamic simulation, the controller gain was recommended in between -117.36 [volt/cm] and -1.17 [volt/cm] and the damping coefficient in between 0 and 1. This study also revealed that by tuning an appropriate controller gain, the fastest and the stable response would be achieved.
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8538
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
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oai:ojs.ejournal.undip.ac.id:article/5717
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Increasing Biogas Production Rate from Cattle Manure Using Rumen Fluid as Inoculums
Budiyono, Budiyono
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Widiasa, I Nyoman
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Johari, Seno
Department of Animal Agriculture, University of Diponegoro, Jl. Prof. Sudharto SH Semarang
Sunarso, S
Department of Animal Agriculture, University of Diponegoro, Jl. Prof. Sudharto SH Semarang
Array
In this study, rumen fluid of animal ruminant was used as inoculums to increase biogas production rate from cattle manure at mesophilic condition. A series of laboratory experiments using 400 ml biodigester were performed in batch operation mode. Given 100 grams of fresh cattle manure (M) was fed to each biodigester and mixed with rumen fluid (R) and tap water (W) in several ratio resulting six different M:W:R ratio contents i.e. 1:1:0; 1:0.75:0.25; 1:0.5:0.5; 1:0.25:0.75; and 1:0:1 (correspond to 0; 12.5; 25, 37.5; 50, and 100 % rumen, respectively) and six different total solid (TS) contents i.e. 2.6, 4.6, 6.2, 7.4, 9.2, 12.3, and 18.4 %. The operating temperatures were at room temperature. The results showed that the rumen fluid inoculated to biodigester significantly effected the biogas production. Rumen fluid inoculums caused biogas production rate and efficiency increase more than two times in compare to manure substrate without rumen fluid inoculums. The best performance for biogas production was the digester with rumen fluid and TS content in the range of 25-50 % and 7.4 and 9.2 %, respectively. These results suggest that, based on TS content effects to biogas yield, rumen fluid inoculums exhibit the similar effect with other inoculums. Increasing rumen content will also increase biogas production. Due to the optimum total solid (TS) content for biogas production between 7-9 % (or correspond to more and less manure and total liquid 1:1), the rumen fluid content of 50 % will give the best performance for biogas production. The future work will be carried out to study the dynamics of biogas production if both the rumen fluid inoculums and manure are fed in the continuous system
Doi: 10.12777/ijse.6.1.31-38
[How to cite this article: Budiyono, Widiasa, I.N., Johari, S. and Sunarso. (2014). Increasing Biogas Production Rate from Cattle Manure Using Rumen Fluid as Inoculums. International Journal of Science and Engineering, 6(1),31-38. Doi: 10.12777/ijse.6.1.31-38]
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5717
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1240
2012-02-12T01:38:24Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Effect of Functionalization Carbon Nanotubes (CNTs) on the Performance of PES-CNTs Mixed Matrix Membrane
Mustafa, Ahmad
Faculty of Chemical Engineering and Natural Resources, University of Technology Malaysia, Skudai Johor Baharu, Malaysia
Kusworo, Tutuk Djoko
Faculty of Engineering, University of Diponegoro, Jl. Prof. Sudharto Tembalang, Semarang, Indonesia. tutukjoko@yahoo.com
Busairi, Abdullah
Faculty of Engineering, University of Diponegoro, Jl. Prof. Sudharto Tembalang, Semarang, Indonesia. tutukjoko@yahoo.com
Ismail, Ahmad Fauzi
Faculty of Chemical Engineering and Natural Resources, University of Technology Malaysia, Skudai Johor Baharu, Malaysia
A new type of mixed matrix membrane consisting of functionalized carbon nanotubes (CNTs) and polyethersulfone (PES) is prepared for biogas purification. PES mixed matrix membrane with and without modification of carbon nanotubes were prepared by a dry/wet phase inversion technique using a pneumatically flat sheet membrane casting machine system. The modified carbon nanotubes were prepared by treating the carbon nanotubes with chemical modification using Dynasylan Ameo (DA) silane agent to allow PES chains to be grafted on carbon nanotubes surface. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Meanwhile, the nanogaps in the interface of polymer and carbon nanotubes were appeared in the PES mixed matrix membrane with unmodified of carbon nanotubes. The modified carbon nanotubes mixed matrix membrane increases the mechanical properties, the productivity and purity of biogas. For PES-modified carbon nanotubes mixed matrix membrane the maximum selectivity achieved for CO2/CH4 is 36.78
Chemical Engineering Diponegoro University
2010-07-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1240
International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/21443
2019-04-23T22:42:38Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
Design of Filing System for police investigation report on the Forensic Document Unit of POLRI Forensic Laboratory Center
Ani, Rochani
Universitas Gunadarma https://orcid.org/0000-0001-6431-8438
Lukman, Saeful
STMIK Jakarta STI&K
Wardijono, Bheta Agus
Universitas Gunadarma
Array
The Archiving system of Official Report of Inspection that runs on the Forensic Document Unit of POLRI Forensic Laboratory is particularly inefficient and effective as it still implements conventional filing systems. The recording of Official Report Documents is only in the general ledger. Based on these problems, the authors formulated "How to create an archiving information system that is expected to accelerate the process of searching, packing, storing records in a safe place". The objective of the research is to produce Information Archiving Information Archive Information System on Forensic Document Forensic Unit of POLRI Forensic Laboratory Center for better, faster, accurate and efficient.
With this system archive data processing archives more centralized and can help search and printing files / data quickly without having to search the archives are stacked, can avoid the loss of original archives. This is due to a scan of the original file that can be seen on this system. Based on the results of the test show that the system built successfully build the police investigation report Archive database. Thus it can be concluded that Official Report of Inspection Archiving System has been successful and ready to be implemented.
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/21443
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/6342
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Prediction of Citizens’ Decisions on Transport Mode Choice in Bandung City, Indonesia by Using General Linear Model Given existing Level of Pedestrian Friendly Environment
Permana, Ariva Sugandi
Senior Lecturer,
Department of Urban and Regional Planning
Faculty of Built Environment
Universiti Teknologi Malaysia http://www.utm.my
Muhamad Ludin, Ahmad Nazri
Department of Urban and Regional Planning
Faculty of Built Environment
Universiti Teknologi Malaysia http://www.utm.my
Perera, Ranjith -
Department of Civil and Architectural Engineering
College of Engineering
Sultan Qaboos University http://www.squ.edu.om
Array
Significant contribution of non-motorized transport to energy and environment has changed the view of people on walking or cycling as one of transport modes. While promoting mass rapid transport, modern cities tend to promote pedestrianization as well to encourage people to walk instead of relying on motorized transport. Creating pedestrian friendly environment in particular parts of the city, especially in CBD, is one such attempt. This study tries to investigate the correlation between perceptions of the citizens on pedestrian friendly environment (PFE) and their decision on the choices of transport modes. The central business district of Bandung City in Indonesia was chosen as the study area. A questionnaire-based research was used to acquire data on citizens’ perception. Eight variables were employed to understand citizens’ perception on PFE. The result shows that PFE does influence citizens’ decision on their transport modes choice.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6342
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6342/13699
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1268
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The effect of tofu cake as an additional feed on local male sheep’s water consumption and their physiological response
Sukarya Dilaga, Wayan
Cattle Science Department, Faculty of Animal Agriculture, Diponegoro University
Jl. Prof. Soedarto, SH. Kampus Tembalang, Semarang
Adiwinarti, R.
Feeds are very important for the growth of animals due to it is contained almost all nutrients needed by the animals. Feeds are not only influence the animal growth but also their physiological response. The objective of this research was to investigate the effect of tofu cake as an additional feed replacing commercial concentrate on local male sheep’s water consumption and their physiological response such as body temperature, pulse, and rate of exhalation. The selected 15 local male sheep (in the age of 8-9 month with initial weight 12.53 ± 1.19 kg) were housed individually in cage for about 14 weeks include 4 weeks adaptation period and 10 weeks experiment.The experiment was conducted using completely randomized design with 3 different treatments and 5 times repetition; T0 = ad libitum grass field + commercial concentrate, T1= ad libitum grass field + wet tofu cake, T2= ad libitum grass field + dried tofu cake, and water were provided in ad libitum method. Data analysis was done using analysis of variance (ANOVA) followed by Duncan’s multiple range test. The result shown that dried tofu cake as an additional feed replacing commercial concentrate was able to increasing the water consumption of local male sheep. Meanwhile the physiological test performed stable in the present of wet or dried tofu cake.
Keywords— alternative feed, physiological response of male sheep
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1268
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6801
2014-05-01T20:17:44Z
ijse:BACK
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Instruction for Authors
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Instruction for Authors
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6801
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3011
2012-08-23T08:14:40Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Effect of King Grass Silage on the Nitrogen Balance and Hematological Profile of Ettawa Grade Male Goat
Sunarso, S.
The aims of this research was to study the nutritional value of ensiled King Grass (Pennisetum purpuphoides) to be applied for goat. Twelve Ettawa grade male (PE), + 10 months old, and with average body weight of 19.45 + 3.03 kg were used to determine the voluntary intake, balance nitrogen and their hematological profile. All of the animals were randomly allotted at individual pens. Data were analyzed statistically using analysis of variance, based on completely randomized design arrangement with four treatments (level of King Grass silage) and three replicates. Treatment means were compared using Duncan multiple range test. The result showed that increasing level of King Grass silage within ration significantly increased the average dry matter (DM) intake per metabolic body weight. In fact, the daily DM intake, nitrogen balance, blood hemoglobin and blood hematocrit of the experimental animals were not affected by level of King Grass silage feed. Experiment had no bad effect on healthy condition of the treated goat, so it implies that conserving grass as silage and then feeding grass silage to goat might be implemented by farmers to secure the continuous supply of green forage to keep the goat production sustainability all year round.
[Keywords: silage, nitrogen balance, haemoglobin, haematocryt, goat]
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3011
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4059
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121013 2012 eng "
2302-5743
2086-5023
dc
Essential Oil Extraction of Fennel Seed (Foeniculum vulgare) Using Steam Distillation
Damayanti, Astrilia
Chemical Engineering Program – Semarang State University
Setyawan, Eko
Indonesia is a potential country in developing essential oils which is each part of the plants produce essential oils such as leaf, seed, fruit, and root. One of the potential plants is fennel. Fennel oil distillation used fennel seed from Cepogo District, Boyolali Regency. The characteristics of the seed are; the color is black and the length is 0,2 centimeters. The condition operation to exctract of the fennel seed are 1 atm and 7,5 hours. The calculation of the time started when the first fennel oil dropped into the decanter. It finished when the fennel oil was not dropped anymore. The color is bright and muddy. The last process is add 1% (m/m) Na2SO4 anhidrous into fennel oil to absorp remain water in it. The distillation process produce fennel oil102,125 grams. Sample of fennel oil tested which are density test, solubility on 90% alcohol, GC-MS test, and AAS test. The result shows that fennel oil from the fennel seed is 2,0425%. The tested samples contain the brightest and the muddies sample. The density of 0,9500 and 0,949 g/cc respectively that is not fulfill to the Food Chemical Codex (FCC). Samples solubility in 90% alcohol (1:3) is fulfill to the the Food Chemical Codex (FCC). Three main components of the brightest sample are anethole (47,51%), estragole (22,41%), and α-fensone (21,92%) while the muddiest sample’s components are anethole (52,38%), estragole (21,37%),and α-fensone (15,74%). The AAS test shows that fennel oil contains 65,1473 ppm which does not fulfill the Indonesian National Standards of patchouli and clove leaf oil.
[Keywords— essential oil; extraction; fennel seed; steam distillation
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4059
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
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oai:ojs.ejournal.undip.ac.id:article/7356
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141014 2014 eng "
2302-5743
2086-5023
dc
Drying of Rosella (Hibiscus sabdariffa) Flower Petals using Solar Dryer with Double Glass Cover Collector
Marnoto, Tjukup
Chemical Engineering Departmen, Faculty of Industrial Technology UPN "Veteran" Yogyakarta
Array
Chemical ingredients in rosella petals are very beneficial for health. Rosella petals needed to be drained for storage and packing purpose. The traditional drying takes 5 days and less healthy. Solar dryer technology can speed up the drying process and protect materials from dust contamination. Solar dryer with double glass covered collector has been designed and made for drying of agricultural products such as rosella flowers. Rosella petals as much as 2300 grams with initial moisture content of 90.84 % be dried with this dryer until the moisture content of 7.67 % takes only 2 days, although the weather was less sunny . The temperature in the drying chamber was not more than 50° C, so it was good for drying groceries, not damaging chemical ingredients. The relative humidity in the space dryeris was about 40 % and it was still relative low. Drying rate and drying performance was expressed by the efficiency and Specific Moisture Evaporation Rate ( SMER ) were influenced by water content of the dried material and weather. Daily efficiency at the first and the second day: 14.931 % and 5.78%, while the daily SMER on the first and the second day: 0.222 and 0.0256 ( kg / kWh ).
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7356
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4311
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130106 2013 eng "
2302-5743
2086-5023
dc
Sensorless Vector Control of AC Induction Motor Using Sliding-Mode Observer
Thinh Doan, Phuc
Department of Mechanical & Automotive Eng., College of Eng., Pukyong National University
Busan 608-739
Tien Nguyen, Tan
Kwun Jeong, Sang
June Oh, Sea
Bong Kim, Sang
Array
This paper develops a sensorless vector controlled method for AC induction motor using sliding-mode observer. For developing the control algorithm, modeling of AC induction motor is presented. After that, a sliding mode observer is proposed to estimate the motor speed, the rotor flux, the angular position of the rotor flux and the motor torque from monitored stator voltages and currents. The use of the nonlinear sliding mode observer provides very good performance for both low and high speed motor operation. Furthermore, the proposed system is robust in motor losses and load variations. The convergence of the proposed observer is obtained using the Lyapunov theory. Hardware and software for simulation and experiment of the AC induction motor drive are introduced. The hardware consists of a 1.5kw AC induction motor connected in series with a torque sensor and a powder brake. A controller is developed based on DSP TMS320F28355. The simulation and experimental results illustrate that fast torque and speed response with small torque ripples can be achieved. The proposed control scheme is suitable to the application fields that require high performance of torque response such as electric vehicles.
doi:http://dx.doi.org/10.12777/ijse.4.2.2013.39-43
[How to cite this article: Doan, P. T., Nguyen, T. T., Jeong, S. K., Oh, S. J., & Kim, S. B. (2013). Sensorless Vector Control of AC Induction Motor Using Sliding-Mode Observer. INTERNATIONAL JOURNAL OF SCIENCE AND ENGINEERING, 4(2), 39-43; doi: http://dx.doi.org/10.12777/ijse.4.2.2013.39-43]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4311
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7918
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Profile Triglycerides Japanese Quail (Coturnix coturnix japonica) After Giving Turmeric (Curcuma longa) Powder
Putra, Sukarman Hadi jaya
Diponegoro University http://sukarmanhjpkompasiana.com
Saraswati, Tyas Rini
Department of Biologi, Faculty Of Science and Mathematics, Diponegoro University
Isdadiyanto, Sri
Department of Biologi, Faculty Of Science and Mathematics, Diponegoro University
Array
The purpose of this study was to determine the triglyceride profile of Japanese quail (Coturnix coturnix japonica) after being given the parameters of turmeric (Curcuma longa) powder; feed intake, profiles of liver triglycerides, profiles of serum triglycerides and profiles of meat triglycerides. This study uses an experimental method with A Completely Randomized Design Pattern. Test animals used were 45 female Japanese quails were divided into 3 groups, namely; P0: quail were not given turmeric powder, P1: quail were given turmeric powder a dose of 54 mg/quail/day, P3: quail were given turmeric powder a dose of 108 mg/quail/day. Each group with 5 replications. Each repeat consists of 3 Japanese quails. Provision of treatment every day for 30 days starting from the age of 14 days. Data were analyzed using analysis of variance (ANOVA) followed by Duncan's test with 95% confidence interval (α = 0.05 level). Analysis of the data used is software Minitab software 16. Results showed that the levels of turmeric powder are given in Japanese quail significant (P˂0.05) on liver triglyceride levels, serum and Japanese quail meat but had no significant effect (P˃0.05) on consumption feed. The results showed that the optimal dose of turmeric powder to lower triglyceride levels of Japanese quail is 108 mg/quail/day as evidenced by the highest decrease in liver triglyceride profiles, profiles of serum triglycerides and triglyceride profiles of Japanese quail meat compared with other treatments.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7918
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7918/17289
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5079
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Effect of H3PO4 Concentration and Particle Size of the Eggshell Used in Laying Hens Fed on Bone and Blood
Kismiati, S.
Faculty of Animal and Agricultural Sciences, Diponegoro University Tembalang Campus, Semarang, 50275
Yuwanto, T.
Faculty of Animal Science, Gadjah Mada University Jl. Fauna 3 Bulaksumur 55281 Yogyakarta
Zuprizal, Z.
Faculty of Animal Science, Gadjah Mada University Jl. Fauna 3 Bulaksumur 55281 Yogyakarta
Supadmo, S.
Faculty of Animal Science, Gadjah Mada University Jl. Fauna 3 Bulaksumur 55281 Yogyakarta
Array
The objective of this research was to evaluate the effect of H3 PO4 concentrations and particle size of eggshell used in the feed of laying hens on bone and blood profiles. Ninety-six laying hens (Isa Brown strain) age 25 weeks were kept in individual battery cage and divided into 8 groups randomly. Group 1 was fed using eggshell with out H3PO4 and particle size of <1 mm (feed 1 ), group 2 was fed using eggshell that has been soaked in H3PO4 3% and particle size of <1 mm (feed 2), group 3 were fed using eggshell that has been soaked in H3PO4 4% and particle size of <1 mm (feed 3), group 4 was fed using eggshell that has been soaked in H3PO4 5% and particle size of <1 mm (feed 4), group 5 was fed using eggshell that has been soaked in H3PO4 and particle size of <3 mm (feed 5 ), group of 6 was fed using eggshell that has been soaked in H3PO4 3% and particle size of <3 mm (feed 6), group 7 was fed using eggshell that has been soaked in H3PO4 4 % and particle size of <3 mm (feed 7) and a group of 8 was fed using eggshell that has been soaked in H3PO4 5% and particle size of <3 mm (feed 8). A Completely Randomized Design patterns factorial 4 x 2 x 3 was used in this research. Result of this research showed that had no interaction effect (P>0.05) between the H3PO4 concentration and particle size of eggshell on weight, volume, diameter of tibia bone and calcium and phosphorus content of the blood. The concentration of H3PO4 or particles size also had no effect (P>0.05) on all variables.
Doi: 10.12777/ijse.5.1.12-14
[How to cite this article: Kismiati, S., Yuwanta, T., Zuprizal, and Supadmo. (2013). Effect of H3PO4 Concentration and Particle Size of the Eggshell Used in Laying Hens Fed on Bone and Blood. International Journal of Science and Engineering, 5(1),6-11. Doi: 10.12777/ijse.5.1.12-14]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5079
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8268
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Initial study of Nickel Electrolyte for EnFACE Process
Widayatno, Tri
Universitas Muhammadiyah Surakarta
Roy, Sudipta
School of Chemical Engineering and Advanced Materials, Newcastle University
Newcastle upon Tyne, Tyne and Wear NE1 7RU
Array
Nickel electrolyte for a micro-pattern transfer process without photolithography, EnFACE, has been developed. Previous work on copper deposition indicated that a conductivity of ~2.7 Sm-1 is required. Electrochemical parameters of electrolyte i.e. current density and overpotential are also crucial to govern a successful pattern replication. Therefore, the investigation focused on the measurement of physicochemical properties and electrochemical behaviour of the electrolyte at different nickel concentrations and complexing agents of chloride and sulfamate. Nickel electrolytes containing sulfamate, chloride and combined sulfamate-chloride with concentrations between 0.14 M and 0.3 M were investigated. Physicochemical properties i.e. pH and conductivity were measured to ensure if they were in the desired value. The electrochemical behaviour of the electrolytes was measured by polarisation experiments in a standard three-electrode cell. The working electrode was a copper disc (surface area of 0.196 cm2) and the counter electrode was platinum mesh. The potential was measured againts a saturated calomel reference electrode (SCE). The experiments were carried out at various scan rate and Rotating Disc Electrode (RDE) rotation speed to see the effect of scan rate and agitation. Based on the measured physicochemical properties, the electrolyte of 0.19 M nickel sulfamate was chosen for experimentation. Polarisation curve of agitated solution suggested that overall nickel electrodeposition reaction is controlled by a combination of kinetics and mass transfer. Reduction potential of nickel was in the range of -0.7 to -1.0 V. The corresponding current densities for nickel deposition were in the range of -0.1 to -1.5 mA cm-2.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8268
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5201
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Pitting Corrosion of Ni3(Si,Ti) Intermetallic Compound at Various Chloride Concentrations
Priyotomo, Gadang
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Array
The pitting corrosion of Ni3(Si,Ti) intermetallic compound was investigated as function of chloride concentration by using electrochemical method and scanning electron microscope in sodium chloride solutions at 293 K. In addition, the pitting corrosion of type C276 alloy was also studied under the same experimental condition for comparison. The pitting potential obtained for the intermetallic compound decreased with increasing chloride concentration. The specific pitting potential and pitting potential of Ni3(Si,Ti) were lower than those of C276 alloy, which means that the pitting corrosion resistance of C276 alloy was higher than that of Ni3(Si,Ti).
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5201
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9713
2016-02-06T11:14:37Z
ijse:AGR
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
Nutrient Potency of Rice Straw Processed with Amofer as Cattle Feed Stuff in East Kalimantan
Mayulu, Hamdi
Faculty of Agriculture, Mulawarman University, Jl. Paser Belengkong Kampus Gunung Kelua Samarinda
Suhardi, Suhardi
Faculty of Agriculture, Mulawarman University, Jl. Paser Belengkong Kampus Gunung Kelua Samarinda
Array
Forage demand can be supplied from rice straw which processed with certain feed technology innovation. Some advantages can be derived under this technology i.e. increasing nutrient content, optimizing the utilization, improving the efficiency and reducing production cost by minimizing feed cost. Ammoniation fermentation (amofer) as an applied technology could give solution over the limitation of rice straw availability. The objective of this research was to determine the potency of rice straw processed with amofer (amofer-rice straw) as raw material to formulate complete feed. The experiment was carried out with randomized block design with three treatments and six replications. Amofer treatment was carried out by adding urea 3% from the total material and then placed into plastic jar +12 liter and then incubated under an-aerobic process for 18 days. Fermentation material i.e. biology starter by 1% of total material was added at the ninth day. Dry Matter (DM) content resulted from each treatments was 87,28%, 85,96% and 84,61% for T1, T2 and T3, respectively. Crude Protein (CP) content was T1=24,48%, T2=21,04%; and T3=24,46%, Crude Fiber (CF) content was T1=31,30%; T2=31,30%; and T3=31,39%. Total Digestible Nutrient (TDN) for version 1 was T1=57,29; T2=56,19; and T3=56,89 and version 2 was T1=53,11%; T2=52,28%; and T3=51,10%. The average value of Non Nitrogen Free Extract (NNFE) was T1=23,49%; T2=28,08%; and T3=26,57%. The utilization of amofer as applicable technology is considered as the most appropriate method to increase the quality of rice straw by significantly increase nutrient content in term of crude protein (CP) and reduce crude fiber (CF) content. This increasing quality can be seen from the result of proximate analysis, NNFE and TDN content
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9713
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5544
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Reservoir Operation to Minimize Sedimentation
Wulandari, Dyah Ari
Diponegoro University
Legono, Djoko
Gadjah Mada University
Darsono, Suseno
Diponegoro University
Array
The Wonogiri Reservoir capacity decreases rapidly, caused by serious sedimentation problems. In 2007, JICA was proposed a sediment storage reservoir with a new spillway for the purpose of sediment flushing / sluicing from The Keduang River. Due to the change of reservoir storage and change of reservoir system, it requires a sustainable reservoir operation technique. This technique is aimed to minimize the deviation between the input and output of sediments. The main objective of this study is to explore the optimal Wonogiri reservoir operation by minimizing the sediment trap. The CSUDP incremental dynamic programming procedure is used for the model optimization. This new operating rules will also simulate a five years operation period, to show the effect of the implemented techniques. The result of the study are the newly developed reservoir operation system has many advantages when compared to the actual operation system and the disadvantage of this developed system is that the use is mainly designed for a wet hydrologic year, since its performance for the water supply is lower than the actual reservoir operations.
Doi: 10.12777/ijse.6.1.16-23
[How to cite this article: Wulandari, D.A., Legono, D., and Darsono, S., 2014. Reservoir Operation to Minimize Sedimentation. International Journal of Science and Engineering, 5(2),61-65. Doi: 10.12777/ijse.6.1.16-23]
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5544
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1233
2012-09-27T14:38:20Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
The Effect of Feed to Inoculums Ratio on Biogas Production Rate from Cattle Manure Using Rumen Fluid as Inoculums
Sunarso, S.
Faculty of Animal Agriculture, Post Graduate Program, Diponegoro University, Jl. Imam Bardjo, SH No. 5 Semarang
Johari, Seno
Faculty of Animal Agriculture, Post Graduate Program, Diponegoro University, Jl. Imam Bardjo, SH No. 5 Semarang
Widiasa, I Nyoman
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH No. 1 Semarang
Budiyono, B.
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH No. 1 Semarang
In this study, rumen fluid of animal ruminant was used as inoculums to increase biogas production rate from cattle manure at mesophilic condition. A series of laboratory experiments using 400 ml biodigester were performed in batch operation mode. Given 100 grams of fresh cattle manure was fed to each biodigester and mixed with rumen fluid and tap water resulting five different feed to inoculum (F/I) ratios (i.e. 17.64, 23.51, 35.27, and 70.54). The operating temperatures were varied at room temperature. The results showed that the rumen fluid inoculated to biodigester significantly effected the biogas production. Rumen fluid inoculums caused biogas production rate and efficiency increase more than two times in compare to manure substrate without rumen fluid inoculums. At four F/Is tested, after 80 days digestion, the biogas yield were 191, 162, 144 and 112 mL/g VS, respectively. About 80% of the biogas production was obtained during the first 40 days of digestion. The best performance of biogas production will be obtained if F/I ratio is in the range of 17.64 to 35.27 (correspond to 25 – 50 % of rumen fluid). The future work will be carried out to study the dynamics of biogas production if both the rumen fluid inoculums and manure are fed in the continuous system
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1233
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/18479
2019-04-23T22:06:14Z
ijse:ART
nmb a2200000Iu 4500
"190419 2019 eng "
2302-5743
2086-5023
dc
Synthesis, Structural and Optical studies of SnO2 nanoparticles by Chemical precipitation method
S, N Ganeshan
Madurai Kamaraj University
Array
Tin Oxide (SnO2) nanoparticles have been prepared by chemical precipitation method. The prepared sample was characterized by X-ray diffraction, SEM with EDAX, UV- Vis absorption and Photoluminescence. From the X-ray diffraction patterns showed that the formation of pure SnO2 with their average crystallite size are 17 nm. The crystalline product shows good morphology with meragre agglomeration by SEM images. Elemental compositions of SnO2 nanoparticles were determined by EDX Spectroscopy. UV – Visible spectrum reveals that the transparency of nanoparticles over entire range. The Photoluminescence spectrum for the prepared samples was also recorded.
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/18479
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/5975
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Watershed Modeling with ArcSWAT and SUFI2 In Cisadane Catchment Area: Calibration and Validation of River Flow Prediction
Ridwansyah, Iwan
Research center for Limnology
Indonesian Institute of Science
Pawitan, Hidayat
Bogor Agricultural University
Sinukaban, Naik
Bogor Agricultural University
Hidayat, Yayat
Bogor Agricultural University
Array
Increasing of natural resources utilization as a result of population growth and economic development has caused severe damage on the watershed. The impacts of natural disasters such as floods, landslides and droughts become more frequent. Cisadane Catchment Area is one of 108 priority watershed in Indonesia. SWAT is currently applied world wide and considered as a versatile model that can be used to integrate multiple environmental processes, which support more effective watershed management and the development of better informed policy decision. The objective of this study is to examine the applicability of SWAT model for modeling mountainous catchments, focusing on Cisadane catchment Area in west Java Province, Indonesia. The SWAT model simulation was done for the periods of 2005 – 2010 while it used landuse information in 2009. Methods of Sequential Uncertainty Fitting ver. 2 (SUFI2) and combine with manual calibration were used in this study to calibrate a rainfall-runoff. The Calibration is done on 2007 and the validation on 2009, the R2 and Nash Sutchliffe Efficiency (NSE) of the calibration were 0.71 and 0.72 respectively and the validation are 0.708 and 0.7 respectively. The monthly average of surface runoff and total water yield from the simulation were 27.7 mm and 2718.4 mm respectively. This study showed SWAT model can be a potential monitoring tool especially for watersheds in Cisadane Catchment Area or in the tropical regions. The model can be used for another purpose, especially in watershed management.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5975
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1261
2012-01-14T21:23:30Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
cover
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1261
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6772
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
The Distribution of Capture Fisheries Based Small Pelagic - Mackerel Fish Species In Balikpapan Waters, East Kalimantan
Abdusysyahid, Said
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Anggoro, Sutrisno
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Bambang, Azis Nur
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Campus UNDIP Tembalang Semarang
Array
In the utilization of common property resource, long term balance in aquaculture is difficult to maintain as people trying to maximize their profit leading to considerable extensification. The objective of this research was to analyze the number of stock, production, and effort of Mackerel fish (Scomberomorus commersonii) resource based on bio-economic approach. Primary data was collected based on purposive sampling method where the respondents in this research were Small Pelagic fishers which determined deliberately due to specific consideration. Secondary data used in this research was obtained from several sources. Data production and effort (input or effort) was arranged in a time sequence according to the type of fishing gears and their targets of fishery resource being studied and then determined the value of CPUE (catch per unit effort). Mathematically, the input gear to be standardized is calculated from fishing power index multiplies with input (effort) of standardized gear. The result shows that the renewable capacity begins to decrease leading to a condition of biologically over fishing. Aside from that, the Mackerel fish resource in this area also experiences economically over fishing condition which indicated by higher economic calculation value and lower capture yield.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6772
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3005
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Studying the Behaviour of Model of Mirror Neuron System in Case of Autism
Anirban, Shikha
Department of Software Engineering, Daffodil International University, Dhaka
Hanif Ali, Mohammad
Department of Computer Science and Engineering, Jahangirnagar University, Savar, Dhaka, Bangladesh
Several experiment done by the researchers conducted that autism is caused by the dysfunctional mirror neuron system and the dysfunctions of mirror neuron system is proportional to the symptom severity of autism. In the present work those experiments were studied as well as studying a model of mirror neuron system called MNS2 developed by a research group. This research examined the behavior of the model in case of autism and compared the result with those studies conducting dysfunctions of mirror neuron system in autism. To perform this, a neural network employing the model was developed which recognized the three types of grasping (faster, normal and slower). The network was implemented with back propagation through time learning algorithm. The whole grasping process was divided into 30 time steps and different hand and object states at each time step was used as the input of the network. Normally the network successfully recognized all of the three types of grasps. The network required more times as the number of inactive neurons increased. And in case of maximum inactive neurons of the mirror neuron system the network became unable to recognize the types of grasp. As the time to recognize the types of grasp is proportional to the number of inactive neurons, the experiment result supports the hypothesis that dysfunctions of MNS is proportional to the symptom severity of autism.
Keywords— Autism, MNS, mirror neuron, neural network, BPTT
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3005
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7007
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
PHYSIOCHEMICAL ASSESSMENT OF LANDFILL GENERATED LEACHATES IN LAGOS, NIGERIA
Akujieze, Christopher N
University of Benin
IDEHAI, Imoukhuede Moses
Department of Geology,
University of Benin,
Benin City,
Nigeria
Array
About 3.5 million tonnes of comingled municipal solid wastes (MSW) are dumped annually into the landfill areas of Lagos in Nigeria with a human population of about 21 million. Upon geo-bio-chemical processes, leachates are produced which are improperly collected and may be introduced to the environment with possible insidious effects on human health. Eight (8) composite leachates samples were collected from four (4) landfills in the megacity and tested for their physiochemical parameters in order to determine their suitability for discharge into agricultural soils and groundwater systems. Geological site investigation reveal that the landfills except Epe have significant attenuative clayey soil protection above groundwater, and can adsorb and/ or precipitate contaminants/ pollutants within its mass. Using ANOVA, juxtapositions of the Fcalculated with the Fcritical values revealed a metal sequence of : Hg > Zn >As >Mn >Ni >K >Pb >Cr>Cd>Fe. Also, total alkalinity> total hardness> total acidity. All the measured anions had Fcalculated above Fcritical values and were in the hierarchy : Chloride> sulphate> phosphate>nitrate.. Mean concentrations were in the order : Fe>Cd>Cr>Pb>K>Ni=Mn>As>Zn>Hg. Fe also posted the highest value for standard deviation. Results of the ratios of the standard deviation to the means were in the sequence: Fe> Zn>K> Ni > Mn>Pb> Cr> Cd> Hg> As. The presence of arsenic above prescribed limits in the Epe leachate is a major concern because the lithology is sandy, and has a reported depth of about 3m to the unconfined aquifer that adjoins the Epe Lagoon. This expansive landfill is recommended for closure.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7007
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7007/14955
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7372
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
INVESTIGATION ON THE EFFECT OF SHAPES ON THE DRYING KINETICS AND SENSORY EVALUATION STUDY OF DRIED JACKFRUIT
Gan, Pek Li
Monash University Malaysia
Poh, Phaik Eong
Monash University Malaysia
Array
Jackfruits are seasonal and highly nutritional fruits indigenous to the Southwestern rainforests of India. However much of the produce are spoilt annually due to poor preservation techniques. Minimal studies have been conducted on the drying kinetics of jackfruit and the effect of shapes on the drying kinetics. In this research, drying curves of three different shaped jackfruit slices were obtained using a convective oven at 40oC, 50oC, 60oC and 70oC. Modified Midilli-Kucuk Model was found to be the best kinetic model for drying of jackfruits. At all temperatures, effective moisture diffusivity values and activation energy varied from 2.66 x 10-10 - 4.85 x 10-10 m2/s and 16.08 - 20.07 kJ/mol respectively. Drying was found to be most efficient at 50oC using the square shaped slices with a R2, RMSE and SSE value of 0.9984, 0.01127 and 0.002668 respectively. Sensory evaluation of untreated and additive-added dried jackfruit slices was conducted by 40 untrained sensory panelists. Jackfruit with ascorbic acid and sugar coating had highest aesthetics value due to better retention of colour by ascorbic acid. However sugar coated jackfruit had the most favorable taste and smell. Further optimization must be done to satisfy consumers collectively to enable a highly marketable product.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7372
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7372/16067
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4285
2012-12-31T07:26:51Z
ijse:ART
nmb a2200000Iu 4500
"121216 2012 eng "
2302-5743
2086-5023
dc
AGV Trajectory Control Based on Laser Sensor Navigation
Luan Bui, Thanh
Department of Mechanical and Automotive Eng., Pukyong National University, Busan 608-739, Korrea
Thinh Doan, Phuc
Department of Mechanical and Automotive Eng., Pukyong National University, Busan 608-739, Korrea
Sil Park, Soon
Kyeong Kim, Hak
Bong Kim, Sang
Autonomous Guided Vehicle Systems (AGVs) are used to transport goods and products in manufacturing fields where navigation can be done in a structured environment. In order to track the given trajectory, a tracking control based on Lyapunov stability theory is introduced. The use of the nonlinear Lyapunov technique provides robustness for load disturbance and sensor noise. To apply Lyapunov's theorem, the kinematic model of AGV is given. To recognize its position in indoor environment, in this paper, a laser sensor device NAV200 is used to detect the AGV position in real-time. For simulation and experiment, software and hardware are described. The AGV consists of 4 wheels with two passive wheels and two driving wheels. A controller is developed based on industrial computer. The effectiveness of the proposed controller is proved by simulation and experimental results.
[AGV Trajectory Control, Laser Sensor Navigation]
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4285
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7921
2014-12-27T21:27:04Z
ijse:EDT
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Front Cover
Support, Editor
(Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front Cover
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7921
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4744
2013-04-17T00:30:05Z
ijse:EDT
nmb a2200000Iu 4500
"130416 2013 eng "
2302-5743
2086-5023
dc
Front Cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Cover
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4744
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8231
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Sensitization of Xanthophylls-Chlorophyllin Mixtures on Titania Solar Cells
Kartini, Indriana
Department of Chemistry, Universitas Gadjah Mada, Yogyakarta INONESIA
Dwitasari, L.
Wahyuningsih, T. D.
Chotimah, Chotimah
Wang, L.
Nanomaterials Centre, School of Chemical Engineering and AIBN,The University of Queensland
Brisbane QLD
Array
Co-sensitization of natural dyes on TiO2 for dye-sensitized solar cell (DSSC) was proposed between chlorophyllin (C) and xanthophylls (X at various volume ratios of C/X. Chlorophyllin is chlorophyll derivative providing -COOH groups essential for binding to TiO2. The chlorophyll was extracted from dried spinach (amaranthus viridis) leaves in a mixture of methanol-acetone (70%:30%). Chlorophyll extract dye was obtained after partition of the crude extracts in diethyl ether solution. Then, it was hydrolyzed under alkaline condition to get chlorophyllin. Xanthophyll was extracted from fresh petal of chrysanthemum (chrysanthemum indicum) flowers. Blending of chlorophyllin and xanthophyll was carried out at various volume ratios of C to X (1:0, 5:1, 1:1, 1:5, 0:1). Titania solar cells were constructed in sandwich system of conducting glass-titania/dyes as the photoanode and conducting glass-platinum as the photocathode. Electrolyte solution containing I-/I3- was inserted between the electrodes by capillary action. All dye extracts and blending solutions were analyzed by UV-Vis spectrophotometer. It is shown that the absorption spectra of blending dyes are complimentary in the visible region resulted in a panchromatic response of the dyes. From the cyclic voltammogram of the dyes and blended-dyes, it is found that the energy level of xanthophyll is the lowest. The I-V test at 100 mw/cm2 irradiation confirmed that the energy conversion efficiency (h) of the blended dyes of xanthophyll and chlorophyllin-sensitized solar cell resulted in significant improvement than those of the single dye. Beneficially, the mixed dyes can be adsorbed from solution blend using single dipping step.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8231
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5330
2013-08-07T10:01:45Z
ijse:EDT
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Editorial (Table of Content, Editorial Board, Preface)
Editor, Support
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Editorial (Table of Content, Editorial Board, Preface)
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5330
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9539
2016-02-06T11:14:37Z
ijse:MED
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
The Efficacy of Dutasteride and Green Tea Combination Towards Angiogenesis and Bleeding on BPH after TURP : Study their effect on VEGF, MVD and Hb
Nugroho, Eriawan Agung
Muslim, Rifki
Riwanto, Ignatius
Pranoto, Soetojo Wirjo
Array
ABSTRACT
Objectives: to find the efficacy dutasteride and green tea in reducing hemorrhage on TURP patients and to evaluate the anti- angiogenesis effect.
Methods: Double Blind Randomized Controlled Trial Post Test Only, with 80 samples, randomized into 4 groups: 1 control group and 3 treatment groups (P1 with 0.5 mg of dutasteride, P2 with a capsul of green tea, and P3 with combination of 0.5 mg dutasteride and a capsul green tea at least 14 days before TURP. We compared the ΔHb define the VEGF expression and MVD count to evaluate the angiogenesis changes between 4 groups. The difference is considered statistically significant with p<.05.
Results: ΔHb (-0.40 + 0.246) pg/ml for control group, (-0.20 + 0.067) pg/ml for P1 group, (-0.18 + 0.081) pg/ml for P2 group, and (-0.14 + 0.092) pg/ml for P3 group. VEGF expression were (20.20 + 17.386), (12.90 + 15.509), (11.60 + 9.121), and (3.60 + 1.667) for control, P1, P2, and P3 group respectively. MVD count were (41.20 + 10.273), (32.75 + 9.318), (26.15 + 7.278), and (18.35 + 7.876) for control, P1, P2, and P3 group respectively. The result from between-subject effect tests showed statistically significant differences in ΔHb (p<0.001), VEGF expression (p<0.001), and MVD count (p<0.001). Dutasteride and green tea significantly reduce the hemorrhage during TURP by decreasing the MVD.
Conclusion: Administration of 0.5 mg dutasteride and 725 mg of green tea, 14 days prior to TURP significantly reduce the hemorrhage during TURP (Δ Hb) by decreasing the MVD
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9539
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21377
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21378
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21379
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21380
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21381
https://ejournal.undip.ac.id/index.php/ijse/article/download/9539/21382
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5598
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Characterization of activated carbon produced from urban organic waste
Haji, Abdul Gani
Department of Chemistry, FKIP Syiah Kuala University, Darussalam, Banda Aceh
Pari, Gustan
2Forest Product Research and Development Center, Bogor
Nazar, Muhammad
Department of Chemistry, FKIP Syiah Kuala University, Darussalam, Banda Aceh
Habibati, H
Department of Chemistry, FKIP Syiah Kuala University, Darussalam, Banda Aceh
Array
The difficulties to decompose organic waste can be handled naturally by pyrolisis so it can decomposes quickly that produces charcoal as the product. This study aims to investigate the characteristics of activated carbon from urban organic waste. Charcoal results of pyrolysis of organic waste activated with KOH 1.0 M at a temperature of 700 and 800oC for 60 to 120 minutes. Characteristics of activated carbon were identified by Furrier Transform Infra Red (FTIR), Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD). However, their quality is determined yield, moisture content, ash, fly substances, fixed carbon, and the power of adsorption of iodine and benzene. The identified functional groups on activated carbon, such as OH (3448,5-3436,9 cm-1), and C=O (1639,4 cm-1). In general, the degree and distance between the layers of active carbon crystallites produced activation in all treatments showed no significant difference. The pattern of activated carbon surface topography structure shows that the greater the pore formation in accordance with the temperature increase the more activation time needed. The yield of activated carbon obtained ranged from 72.04 to 82.75%. The results of characterization properties of activated carbon was obtained from 1.11 to 5.41% water, 13.68 to 17.27% substance fly, 20.36 to 26.59% ash, and 56.14 to 62.31% of fixed carbon . Absorption of activated carbon was good enough at 800oC and 120 minutes of activation time, that was equal to 409.52 mg/g of iodine and 14.03% of benzene. Activated carbon produced has less good quality, because only the water content and flying substances that meet the standards.
Doi: 10.12777/ijse.5.2.89-94
[How to cite this article: Haji, A.G., Pari, G., Nazar, M., and Habibati. (2013). Characterization of activated carbon produced from urban organic waste . International Journal of Science and Engineering, 5(2),89-94. Doi: 10.12777/ijse.5.2.89-94]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5598
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7691
2015-02-16T08:58:09Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
REDUCING THE PRODUCTION TIME OF INDONESIAN SWEETENED SOY SAUCE WITH FERMENTATION MODIFICATION
Suryodinoto, Timothy Henri
Swiss German University
Array
Indonesian sweet soy sauce commonly produced using two states of fermentation, the solid-state koji fermentation followed by liquid state of moromi fermentation. Moromi fermentation may take up to 2 months in common soy sauce production. This research explored alternative fermentation techniques to shorten the production time, and thus reducing production cost, without sacrificing the safety aspect and flavor quality of the sweetened soy sauce. Several modification in the fermentation process was applied and the soy sauce produced. Total plate count and coliform enumeration showed that the soy sauce without moromi fermentation did not meet the national standard of total microbial number. The selected soysauce was then further analyzed for its sensorial and nutritional value. Free choice profiling (FCP) resulted that there is no significance different between each modificated samples. Proximate and amino acid content were also conducted to characterize the nutritional value. The proximate analysis showed that the selected soy sauce has met the Indonesian National Standard (SNI) and amino acid content showed that the control soy sauce has more value than other sample. It can be summed up that modification on koji fermentation was not necessary, meanwhile moromi fermentation could be shortened further, due to safety aspect.
Chemical Engineering Diponegoro University
2014-01-06 15:07:24
https://ejournal.undip.ac.id/index.php/ijse/article/view/7691
International Journal of Science and Engineering; ARTICLE IN PRESS
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/11575
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
dc
Apoptosis of Colorectal Cancer Cell on Sprague-Dawley Rats Induced with 1,2 Dimethylhidrazine and Phyllanthus niruri Linn Extrac
Sawitri, Endang
Laboratory of Physiology, Medical Faculty, Mulawarman University, Jl. Krayan Kampus Gunung Kelua Samarinda
Array
Apoptosis cell is one of the main biomolecular predictors to determine kind of treatment given to patient with colorectal cancer and to predict the end result. Phyllanthus niruri Linn (P. niruri L) acts as antineoplastic but its potency on the process of cancer cell apoptosis has not been revealed yet. The objective of the research was to evaluate the apoptosis index of rats with colorectal cancer treated with and without P. niruri L. extract. This research used The Randomized Posttest-Only Control Group Design. As many as 30 male Sprague-Dawley rats were induced with 1,2 DMH 30 mg/kgBW once in every week. Four rats were sacrificed at week 9th, 11th and 13th to be observed the development of colorectal cancer. Induction was then stopped and other 18 rats were randomly located into two groups. The first group was positive control (K+) group consisted of 9 rats without P. niruri extract. The second group (X) was consisted of 9 rats with the application of P.niruri L. extract 13.5 mg/kg per day orally. All rats were terminated on week 19th, tumor lesion was proceed for Histopathology preparations and stained with Kit TUNEL-IHC (Apo-BrdU-IHCTM BioVision Cat #K403) to identify the apoptosis cell. Data were analyzed using unpaired t-test with significant level of p<0.05. The result showed that the average of apoptosis index of X treatment was 2.37 + 0.48 higher than K+ treatment namely 1.45 + 0.41 with a highly significance difference (p=0.000). Phyllanthus niruri L extract increased the apoptosis of colorectal cancer of Sprague-Dawley rats induced with 1,2 Dimethylhidrazine
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/11575
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5907
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Pitting Corrosion of Ni3(Si,Ti)+4Al Intermetallic Compound at Various Chloride Concentrations
Priyotomo, Gadang
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Sebleku, Pius
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Kaneno, Yasuyuki
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
1-1 Gakuen-cho, Sakai, Osaka
Array
The pitting corrosion of Ni3(Si,Ti) with 4 at% Al consisting of two regions of a Ni3(Si,Ti) single-phase of L12 structure and two phases of L12 and fcc Niss was investigated as function of chloride concentrations by using electrochemical method, scanning electron microscope and energy dispersive X-Ray spectroscopy in neutral sodium chloride solutions at 293 K. In addition, the pitting corrosion of Ni3(Si,Ti) and type C276 alloy were also studied under the same experimental condition for comparison. The pitting potential obtained for the Ni3(Si,Ti) with 4 at%Al decreased with increasing chloride concentration. The specific pitting potential and pitting potential of Ni3(Si,Ti) with 4at%, Ni3(Si,Ti) and C276 were the lowest, the moderate and the highest, respectively, which means that the pitting corrosion resistance of Ni3(Si,Ti) was higher than Ni3(Si,Ti) with 4at% Al, but lower than that of C276. A critical chloride concentration of Ni3(Si,Ti) with 4at% Al was found to be lower than that of Ni3(Si,Ti). The Pitting corrosion of Ni3(Si,Ti) with 4at% Al occurred in the two phase mixture (L12 + Niss).
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5907
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1252
2011-12-26T00:08:01Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Cover
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Cover
Chemical Engineering Diponegoro University
2010-12-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1252
International Journal of Science and Engineering; Vol 1, No 2 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6703
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Clonal Propagation of Two Clones Eucalyptus Pellita F. Muell By Mini-Cutting
Dwi Sulichantini, Ellok
Agricultural Faculty of Mulawarman University, Jl. Pasir Belengkong Kampus Gunung Kelua, Samarinda
Sutisna, Maman
Forestry Faculty of Mulawarman University Samarinda
Sukartiningsih, Sukartiningsih
Forestry Faculty of Mulawarman University Samarinda
Rusdiansyah, Rusdiansyah
Agricultural Faculty of Mulawarman University, Jl. Pasir Belengkong Kampus Gunung Kelua, Samarinda
Array
Eucalypt is known as the fastest growing tree species in the world. Some advantages such as fast growing, hight yielding, short rotation, less desease, lots of purposes and good economic benefit have made Eucalypt as the most important forest tree product for industrial raw material in Indonesia. However, those advantages of Eucalypt including fast growing, high yielding, short rotation and less desease can only be achieved through selecting a good clone. Cutting propagation is considered as one of the main methode to produce good seedling. Sprouts of two clones of Eucalyptus pellita F. Muell (E. 13 and E. 77) were collected from mini hedge. Total of 1080 of each clone was planted in greenhouse. The result showned that Clone E. 77 was better than E. 13 in term of growth of rooting, the increment of height, stem diameter and number of leaves at 60 and 75 days after planting
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6703
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1274
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Isolation and Fermentation of Lactobacillus plantarum JR64 as an Omega 6 Probiotic Producer
Sumarno, Lanjar
Biotech Center - BPPT, Gedung 630, Kawasan Puspiptek Serpong, Tangerang Selatan
Mangunwidjaja, Djumali
M. Fauzi, Anas
Syamsu, Khaswar
Siswi Indrasti, Nastiti
Prasetya, Bambang
Application of lactic acid probiotic bacteria in health food diversification currently is progressing rapidly. It is encouraged the study of searching the potential strains from local resources (Ponorogo Residence) namely noni fruits (badeg pace) and noni wine. Aims of this study were to perform the isolation, identification, and production of probiotic Lactobacillus sp. JR64 fermentation process as a producer of Omega-6 (ω-6) lowering cholesterol and design of probiotic creamy product. Beginning stages of research was strains isolating and in-vitro testing, the best result were used in molecular identification technology development for the production of metabolites through the manipulation of environmental variation of glucose 20 g / l, 30 g / l and 40 g / l that influenced the substrate concentration of linoleic acid productivity. The result of new isolates isolation showed that isolates that obtained from noni wine, Lactobacillus plantarum JR64, was potential as probiotic condidate. The effieciency of fermentation substrates using Yx/s and Yp /s in the exponential phase was the highest value for the fermentation of 24 hours of Yx/ s; 17.03% and Y p/s; 74.72%, while the results of design and the best formulation for viability cells of lactobacillus plantarum probiotics JR64 was composed of 15 g and 50g butter 15 g icing sugar as well as during storage of the refrigerant temperature was 8.92 x 108 CFU / ml.
[Key Words : Omega-6, Lactobacillus plantarum JR64, fermentation]
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1274
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7711
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
A HIGH ORDER SOLUTION OF THREE DIMENSIONAL TIME DEPENDENT NONLINEAR CONVECTIVE-DIFFUSIVE PROBLEM USING MODIFIED VARIATIONAL ITERATION METHOD
Joshi, Pratibha
UNIVERSITY OF PETROLEUM & ENERGY STUDIES, DEHRADUN.
Pathak, Maheshwar
UNIVERSITY OF PETROLEUM & ENERGY STUDIES, DEHRADUN.
Array
In this paper, we have achieved high order solution of a three dimensional nonlinear diffusive-convective problem using modified variational iteration method. The efficiency of this approach has been shown by solving two examples. All computational work has been performed in MATHEMATICA.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7711
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4511
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130222 2013 eng "
2302-5743
2086-5023
dc
The effect of geometric structure on stiffness and damping factor of wood applicable to machine tool structure
Adi Widyanto, Susilo
Mechanical Engineering, University of Diponegoro, Jl. Prof Sudarto, SH, Semarang
Widodo, Achmad
Mechanical Engineering, University of Diponegoro, Jl. Prof Sudarto, SH, Semarang
Nugroho, Sri
Mechanical Engineering, University of Diponegoro, Jl. Prof Sudarto, SH, Semarang
Siahaan, David
Array
Stiffness and vibration damping capability are important criteria in design of machine tool structure. In other sides, the weight of machine tool structure must be reduced to increase the handling capability. This paper presents an analysis of the effect of geometric structure on stiffness and vibration damping of wood structure. The stiffness was analysed using numerical method, so called finite element method (FEM), while the vibration damping capability was experimentally tested. Vibration testing was also performed to wood structures with sand powder filled into its rectangular hole to observe the its effect on damping factor. Simulation results show that the cross ribs structure yielded minimum mass reduction ratio compared to the three square holes as well as the single rectangular hole structures. While the vibration test results explained that the damping factor of Shorea laevis wood was higher than that Hevea braziiensis wood. The use of sand powder as vibrating mass in closed-box structure effectively increased the damping capability, for single rectangular hole structure the damping factor was increased from 0.048 to 0.079
doi: http://dx.doi.org/10.12777/ijse.4.2.2013.57-60
[How to cite the article: Widyanto, S. A., Widodo, A., Nugroho, S., & Siahaan, D. (2013). The effect of geometric structure on stiffness and damping factor of wood applicable to machine tool structure. INTERNATIONAL JOURNAL OF SCIENCE AND ENGINEERING, 4(2), 57-60. doi: http://dx.doi.org/10.12777/ijse.4.2.2013.57-60]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4511
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7229
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
The Nutrient Digestibility of Locally Sheep Fed with Amofer Palm Oil Byproduct-Based Complete Feed
Mayulu, Hamdi
(Animal Feed and Nutrition Laboratory, Faculty of Agricultural Sciences, Mulawarman University
Jl. Pasir Belengkong Kampus Gunung Kelua Samarinda
Array
Utilization of palm oil by-product such as palm fronds, leaves, empty fruit bunches (EFB), fiber fruit juice (FFJ), palm kernel cake (PKC), and palm oil sludge (POS) as the source of energy and protein for ruminants, especially sheep is an efficient effort to make a new opportunities in term of economical and beneficial product that will reduce environmental pollution. The objectives of this research were to analyze the effect of palm oil’s byproduct-based complete feed on sheep’s nutrient digestibility. Sixteen male sheeps of nine month old with average body weight 14.69+0.82 kg were used. The complete feed was formulated by ammoniated-fermented technology from palm fronds and leaves, EFB and FFJ, also Centrosema sp., PKC, POS, ground corn, rice bran, cassava, molasses, urea, mineral mix and salt. The complete feed with different levels of crude protein (CP) and TDN were used in this research which consisted of T1=10,63% CP; 63.46% TDN; T2=12.27% CP; 62.38% TDN; T3=13.70% CP; 64.11% TDN; and T4=15.90% CP; 61.28% TDN. The study used a completely randomized design (CRD) which consisted of four treatments and four replications. Data was analyzed using ANOVA with significance level at 95% and followed by Duncan Multiple Range Test. The experimental results showed that the protein level affected the feed digestibility. The highest digestibility of dry matter, organic matter and crude protein were 65.79%, 70.30%, and 84.34% respectively, resulting in 14% protein level (T3) were significantly different with treatment at protein level 10% (T1), 12% (T2) and 16% (T4) at p <0.05. It can be concluded that by-product of palm oil plantation and mill had good nutritional value. Therefore, this feedstuff can be used to formulate complete feed for sheep and it successfully increased the nutrient digestibility
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7229
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4221
2012-12-06T23:25:49Z
ijse:EDT
nmb a2200000Iu 4500
"121205 2012 eng "
2302-5743
2086-5023
dc
List of Content, Editorial Board, Preface
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
List of Content, Editorial Board, Preface
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4221
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7665
2015-02-16T08:58:09Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
DRYING KINETICS MODELLING OF TARAP (ARTOCARPUS ODORATISSIMUS)
Tham, Heng Jin
Universiti Malaysia Sabah
Lee, Jau Shya
Universiti Malaysia Sabah
Array
The effects of temperatures, 50˚C, 60˚C and 70˚C on the drying behaviour of tarap slices were experimentally investigated. High drying temperature resulted in shorter drying time and higher drying rate. Results show that the drying of tarap slices occurred at falling rate period. The effective moisture diffusivity increases from 1.216 to 2.432 × 10-11 m2/s with the increase in drying temperature. The activation energy of tarap is found to be 32 kJ/mol and the constant diffusivity is 1.969 × 10-6 m2/s. As for the modelling of drying kinetics, three statistical parameters namely coefficient of determination, reduced chi-square and root means square error were determined, and Midilli-Kucuk model was found to be the most suitable for describing the drying curves of tarap slices.
Chemical Engineering Diponegoro University
2014-01-06 15:07:24
https://ejournal.undip.ac.id/index.php/ijse/article/view/7665
International Journal of Science and Engineering; ARTICLE IN PRESS
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4584
2013-06-19T22:00:15Z
ijse:ART
nmb a2200000Iu 4500
"130313 2013 eng "
2302-5743
2086-5023
dc
The Effects of Different Energy and Protein Ratio to Sheep’s Nutrient Intake and Digestibility
Mawati, Sri
Faculty of Animal Science and Agriculture, Diponegoro University, Kampus drh.Soejono Koesoemowardoyo
Semarang
Soedarsono, S.
Faculty of Animal Science and Agriculture, Diponegoro University, Kampus drh.Soejono Koesoemowardoyo
Semarang
Sunarso, S.
Faculty of Animal Science and Agriculture, Diponegoro University, Kampus drh.Soejono Koesoemowardoyo
Semarang
Purnomoadi, Agung
Faculty of Animal Science and Agriculture, Diponegoro University, Kampus drh.Soejono Koesoemowardoyo
Semarang
Array
The objective of this research was to study the effects of different energy and protein ratio towards sheep’s nutrient intake and digestibility. Twenty four male sheep’s, 6 – 7 months old with initial average live weight 13+1.56 kg, coefficient variant11.78%) were used in this research. The complete feed ration which consisted of King Grass (Pennisetum purpureum), soybean powder, rice bran, dried cassava and molasses was used in this research. Protein content on each component was 10, 12 and 14% and total digestible nutrients (TDN) 60 and 65%, respectively. Dry matter (DM) and organic matter (OM) intake, DM and OM digestibility were studied in this research. Analysis of variance (ANOVA) was employed to analyze the data. Test of Small Difference (P<0.05) was then carried out if significant different occurred. The research results showed that Dry matter and OM ration intake showed significant different among treatments (P<0.05). The highest DM intake was obtained at crude protein (CP) 14% and TDN 65% i.e. 695.54 g while the lowest value was CP 14% and TDN 65% i.e. 462.11 g. Thus different DM and OM intake were caused by different ration ingredients composition. Dry matter and OM ration digestibility were not show different (P>0.05) among crude protein and TDN treatments. Different energy and protein ration treatments caused different DM and OM intake but were not cause different in DM and OM digestibility. Based on the research results, a study on the effects of different ration’s energy and protein ratio towards N efficiency should be conducted in order to increase cattle productivity.
Doi: http://dx.doi.org/10.12777/ijse.4.2.75-79
[How to cite this article: Mawati, S., Soedarsono, S., Sunarso, S. & Purnomoadi, A. (2013). The Effects of Different Energy and Ratio to Sheep’s Nutrient Intake and Digestibility. International Journal of Science and Engineering, 4(2),76-79. Doi: http://dx.doi.org/10.12777/ijse.4.2.75-79]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4584
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8248
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
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TREATMENTS OF PLASMA CORONA RADIATION ON SEAWEED Gracilaria Verrucosa (HUDSON) PAPENFUSS: Efforts to increase growth and biomass
Putra, Filemon Jalu N
Department of Biology, Faculty of Sciences and Mathematics, Diponegoro University, Semarang
Muhlisin, Zaenul
bDepartment of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Semarang
Putro, Sapto P.
Department of Biology, Faculty of Sciences and Mathematics, Diponegoro University, Semarang
Array
Gracilaria verrucosa (Hudson) Papenfuss has great potential to be farmed in the water resources in Indonesia. As natural resource, the weed has a major contribution in the field of industry both for human food and health. Efforts have been done intensively to increase the production capacity to meet the market demand especially gelatin, both national and international market. One of them is the application of plasma corona irradiation treatments on the weed to improve developmental pathways. The concept of plasma irradiation performed at atmospheric conditions may impact on nitrogen intrusion pathway that is important element in the growth of the weed. The aims of this study are to assess the potential impact of plasma irradiation in improving the growth of G. verrucosa and thus increase their biomass production. The treatments were done using five different duration of plasma irradiation, which were 2, 4, 6, 8, and 10 minutes at a 0,5mA stable source of voltage and 8kV of electrical current. Observations of growth rate include thallus length and biomass of G. verrucosa , that was observed every week for 28 days. The result showed that the growth of weed exhibited better than those without radiation. The best growth was reached in the group of treatment of 8 minutes irradiation, exhibited 65,91g of biomass and 9.5515% growth rate and length of thallus reached 22,33 cm and daily growth rate of 2.9759%. The lowest growth of the weed occurred in the treatment of 10 minutes irradiation, which was 44,82 g biomass, 8.123% growth rate, 17,13 cm thallus length with a daily growth rate of 1.9942%
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8248
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5114
2013-12-14T09:28:22Z
ijse:ART
nmb a2200000Iu 4500
"130716 2013 eng "
2302-5743
2086-5023
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Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines
Sarkar, Alok
Department of Metallurgical Engineering, IIT (BHU), Varanasi-221005
Mandal, Arup Kumar
Indian Institute of Technology
(Banaras Hindu University)
Varanasi https://www.iitbhu.ac.in
Sinha, O. P.
Department of Metallurgical Engineering, IIT (BHU)
Array
The present study deals with the utilization of fines generated from comminution process (crushing, grinding and screening) of the Run of Mines into value added products i.e. fluxed iron ore pellets. The study comprises to understand the physical and mechanical behavior of five distinguished chemical compositions of green and dried iron ore pellets with respect to a typical Mini Blast furnace (MBF) burden data and furnace operating parameter. The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at 100% high ash coke (avg. ash content= 29%). The crushing strength and drop number of various green pellets were measured. Green Crushing Strength was decreased with increasing lime fines. The addition of lime fines as a burnt lime, which has acicular structure creates less plasticity and brittle like fracture occurred. Due to formation of hard CaCO3 layer on the surface, after increasing lime contain crushing strength was increased in the air and oven dry pellets with respect to acid pellet (0% lime fines addition).
[How to cite this article: Sarkar, A., Mandal, A.K., and Sinha, O.P. (2013) Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines. International Journal of Science and Engineering, 5(2),9-14. Doi: 10.12777/ijse.5.2.9-14]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5114
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/5114/11182
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8842
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
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Take Advantage of Wasteful Batang Hari Irrigation For Electricity Services Improvement
Istijono, Bambang
Civil Engineering Dept., Andalas University, Senior Lecturer, Padang
Hakam, Abdul
Disaster Study Centre, Andalas University, Padang
Array
This paper describes the Batang Hari Irrigation prospect to meet the electricity needs in its surrounding area in order to increase the electrical service for every level society. The use of Batang Hari irrigation is far from its capacity. Un-used water and infrastructures from Batang Hari irrigation can be used to generate hydro-electric. Based on the results of this study, it can be concluded that the Batang Hari Irrigation can be used to generate electricity power up to 1.6 MW. This hydro power service can increase the level of electric service in West Sumatra Province more than 1%
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/8842
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5594
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Potency of Palm Oil Plantation and Mill Byproduct as Ruminant Feed in Paser Regency, East Kalimantan
Mayulu, Hamdi
Mulawarman University, Kampus Gunung Kelua Jl. Kuaro Samarinda
Sunarso, S
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Sutrisno, C. I.
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Sumarsono, S
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Christiyanto, M
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Isharyudono, K.
Diponegoro University, Kampus drh.Soejono Koesoemowardoyo Semarang
Array
By-product produced from plantation and palm oil mill can be utilized for energy and protein source of ruminant feed. Thus, it still has potency for further exploration. The objective of the research was to investigate the nutrient value of palm oil plantation and mill’s by-product used to formulate ruminant feed. The research located in 66,118.5 ha of palm oil plantation in Paser regency, East Kalimantan province. The research was carried out in palm oil plantation and mill of PTPN XIII comprising productive plants (TM) in +14,000 ha arranged in 9 divisions (afdeling). Measured variables consisted of: 1) dry mass production (mass of midrib every cutting and frond) (kg); 2) Centrosema sp mass production (kg); 3) mass of empty fruit bunches (kg); palm pressed fiber (PPF) (kg), palm kernel cake (PKC) (kg) dan palm oil sludge (POS) (kg); 4) nutrient content analyzed under proximate analysis in accordance with the procedure of Ruminant Feed Nutrient Laboratory, Faculty of Livestock, Diponegoro University. The result showed that total dry matter (DM) production was 14.82 ton/ha/year, consisting: midrib 29.09% (crude protein (CP) 3.16% and crude fiber (CF) 37.85%), frond 10.31% (CP 6.53% dan CF 30.39%), Centrosema sp. 2.48% (CP 22.58% and CF 35.12), EFB 24.31% (CP 7.01% and CF 40.22%), PPF 1.23% (CP 5.56% and CF 50.36%), PKC 1.29% (CP 15.49% and CF10.45) and POS 1.20% (CP 17.86% and CF 45.99%). This could be concluded that palm oil plantation and mill’s by-product was recommended for ruminant feed as it had huge amount and appropriate nutrient content
Doi: 10.12777/ijse.5.2.56-60
[How to cite this article: Mayulu, H., Sunarso, C. I. Sutrisno, Sumarsono, M. Christiyanto, K. Isharyudono. (2013). Potency of Palm Oil Plantation and Mill Byproduct as Ruminant Feed in Paser Regency, East Kalimantan, 5(2),56-60. Doi: 10.12777/ijse.5.2.56-60]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5594
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/10119
2016-02-06T11:14:37Z
ijse:CHE
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
Analysis Loading Height of HTR (High Temperature Reactor) Core to Obtain Criticlity of Reactor
Setiawati, Evi
Faculty of Science and Mathematics, Diponegoro University
Array
High temperatur reactor (HTR) attract to be studied due to it has inherent safety characteristics and capabilities to produce energy economically. Design of reactor core in this study is a blend HTR 10 in China with HTR pebble-bed. The reactor has thermal power of 10 MW with inlet and outlet helium temperatures of 250oC and 700oC. HTR design is a cylindrical with helium gas as a coolant and graphite as a moderator. The HTR uses pebble-bed fuel composed a large amount of particles of TRISO in graphite metrics. Kernel radius used to analyse reactor core height in this research is 225 µm with enrichment of 16% in order to achieve critical condition. Reactor criticality is also influenced by the height of active reactor core where pebble-bed fuel is distributed. Calculation of the reactor criticality at any height variations active core is done with MCNP5 modelling techniques. The modelling is done by making the geometry of reactor and pebble-bed which is distributed by using body-centred cubic lattice in the reactor core. From the MCNP5 calculation, the first criticality of HTR can be achieved on the active core height of 150.9012 cm calculated from the bottom active core with criticality value of 1.00312±0.00090. The higher active reactor core is, the more increasing the reactor criticality is. This is occured due to there are many fuel balls of pebble-bed used, so that activity of fission in reactor increases. However, reactor criticality is still in stable condition in each the rise of active core height from critical core height even though reactor reactivity increases 0.01 Δk/k. The minimum of fuel needed to achieve initial criticality (critical core height) is 11,805 pebbles and 8,906 moderators.
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/10119
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5642
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Corrosion Behavior of Ni3(Si,Ti) + 2Mo in Hydrochloric Acid Solution
Priyotomo, Gadang
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Sebleku, Pius
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Array
The corrosion behavior of Ni3(Si,Ti) + 2Mo intermetallic compound (L12 and (L12 + Niss) mixture region) has been investigated using an immersion test, polarization method and surface analytical method (scanning electron microscope and energy-dispersive X-Ray spectrometry) in 0.5 kmol/m3 hydrochloric acid (HCl) solution at 303 K. In addition, the results obtained were compared to those of the L12 single-phase Ni3(Si,Ti) intermetallic compound and C 276 alloy. It was found that Ni3(Si,Ti) + 2Mo had the preferential dissolution of L12 with a lower Mo concentration compared to (L12 + Niss) mixture region. From the immersion test and polarization curves, Ni3(Si,Ti) + 2Mo and C276 showed the lowest corrosion resistance and the highest corrosion resistance in the solution, respectively. From this work, It implied that unlike C276, Ni3(Si,Ti) +2Mo intermetallic compound was difficult to form a stable passive film in HCl solution as well as Ni3(Si,Ti) in the same solution.
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5642
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1242
2012-02-12T01:38:24Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Application of Activated Carbon Mixed Matrix Membrane for Oxygen Purification
Kusworo, Tutuk Djoko
Faculty of Engineering, University of Diponegoro, Jl. Prof. Sudharto Tembalang,
Semarang, Indonesia
Ismail, Ahmad Fauzi
Faculty of Chemical Engineering and Natural Resources, University of Technology Malaysia, Skudai Johor Baharu, Malaysia
Mustafa, Ahmad
Faculty of Chemical Engineering and Natural Resources, University of Technology Malaysia, Skudai Johor Baharu, Malaysia
Budiyono, ,
Faculty of Engineering, University of Diponegoro, Jl. Prof. Sudharto Tembalang,
Semarang, Indonesia
This study is performed primarily to investigate the effect of activated carbon on oxygen separation performance of polyethersulfone mixed matrix membrane. In this study, polyethersulfone (PES)-activated carbon (AC) mixed matrix membranes were fabricated using dry/wet technique. This study investigates the effect of polyethersulfone concentration and activated carbon loading on the performance of mixed matrix membrane in terms of permeability and selectivity of O2/N2 gas separation. The fabricated flat sheet mixed matrix membranes were characterized using permeation test, Field Emission Scanning Electron Microscopy (FESEM) analysis and Differential Scanning Calorimetry (DSC). It was found that the activated carbon loading affected the gas separation performance of mixed matrix membrane. PES- 1wt% AC membrane yielded 3.75 of O2/N2 selectivity, however 5 wt% of AC can produced 5 O2/N2 selectivity
Chemical Engineering Diponegoro University
2010-07-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1242
International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/22836
2019-04-23T22:41:16Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
The Correlation between Total Ischemic Time with Length of Hospitalization : a Single Centre Report
Nugroho, Eriawan Agung
(1Division of Urology, Dr Kariadi General Hospital/Medical Faculty Diponegoro University, Semarang http://orcid.org/0000-0001-6137-1495
Kamar, Muhamad Azwin
2Departmentof Surgery, Dr Kariadi General Hospital/Medical Faculty Diponegoro University, Semarang
Junita, Dila
2Departmentof Surgery, Dr Kariadi General Hospital/Medical Faculty Diponegoro University, Semarang
Array
Kidney transplantation is recognized as an advanced modern therapeutic modality for patients with end stage renal failure. Cold Ischemic Time (CIT) has been found as an important independent risk factor for delay graft function (DGF) in kidney transplantation. Recent studies suggested that prolonged Warm Ischemic Time (WIT) may decrease graft’s survival in living kidney transplantation donor.This study aimed to evaluate the total ischemic time during recipient surgery and accessed its contribution for hospitalization time in kidney transplantation patients.This is an observational, cross sectional study. The datawas collected from medical record of patient who underwent kidney transplantation from 2014 until December 2018at Kariadi General Hospital Semarang. There were 28 patients, 18 were maleand 10 were female.Total ischemic time was compared with length of hospitalization. Data was analyzed with Spearman test in SPSS version 23. The study showed that total ischemic time was significantly correlated with hospitalization time (p < 0.001). However, donor’s age did not affect prolonged total ischemic time with p = 0.673, which is not significant (significant if p value < 0.05). In conclusion, total ischemic time has a significant correlation with hospitalization time. In contrary, no significant correlation between donor’s age and prolonged total ischemic time.
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/22836
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/6640
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Hybrid membrane using polyethersulfone-modification of multiwalled carbon nanotubes with silane agent to enhance high performance oxygen separation
Kusworo, Tutuk Djoko
(Scopus ID- 23025251700; H-Index: 2); Department of Chemical Engineering, Diponegoro University Semarang, Central Java, Indonesia
Ismail, Ahmad Fauzi
2Advanced Membrane Research Technology Center (AMTEC)
Faculty of Chemical and Natural Resources Engineering,
Universiti Teknologi Malaysia
Mustafa, Azeman
2Advanced Membrane Research Technology Center (AMTEC) Faculty of Chemical and Natural Resources Engineering,
Universiti Teknologi Malaysia
Array
Mixed matrix membrane comprising carbon nanotubes embedded in polymer matrix have become one of the emerging technologies. This study was investigated in order to study the effect of silane agent modification towards carbon nanotubes (CNT) surface at different concentration on oxygen enrichment performances of asymmetric mixed matrix membrane. The modified carbon nanotubes were prepared by treating the carbon nanotubes with chemical modification using Dynasylan Ameo (DA) silane agent to allow PES chains to be grafted on carbon nanotubes surface. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Sieve-in-a-cage’ morphology observed shows the poor adhesion between polymer and unmodified CNT. The gas separation performance of the asymmetric flat sheet mixed matrix membranes with modified CNT were relatively higher compared to the unmodified CNT. Hence, coated hollow fiber mixed matrix membrane with chemical modification on CNT surface using (3-aminopropyl)-triethoxy methyl silane agent can potentially enhance the gas separation performance of O2 and N2.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6640
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1275
2012-01-14T21:23:30Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Submission Information
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Submission Information
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1275
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6756
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Pitting Corrosion of Ni3(Si,Ti)+2Cr Intermetallic Compound at Various Chloride Concentrations
Priyotomo, Gadang
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Sebleku, Pius
Research Center for Metallurgy, Indonesian Institute of Sciences, Serpong, Tangerang
Kaneno, Yasuyuki
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
Array
The pitting corrosion of Ni3(Si,Ti) with 2 at% Cr containing two regions of a Ni3(Si,Ti) single-phase of L12 structure and a mixture phase of of (L12 +Niss) was investigated as function of chloride concentrations by using a polarization method, scanning electron microscope and energy dispersive X-Ray spectroscopy in neutral sodium chloride solutions at 293 K. The pitting corrosion of Ni3(Si,Ti) with and without the addition of aluminium and type C276 alloy were also studied under the same experimental condition for the comparison. The pitting potential obtained for the Ni3(Si,Ti) with 2 at% Cr decreased with increasing chloride concentration. The specific pitting potentials and the pitting potentials were decreased in the order of C276 alloy > Ni3(Si,Ti) > Ni3(Si,Ti) + 2Cr > Ni3(Si,Ti) + 4Al, which means that the pitting corrosion resistance of Ni3(Si,Ti) with 2 at% Cr was higher than Ni3(Si,Ti) with 4 at% Al, but lower than that of Ni3(Si,Ti). A critical chloride concentration of Ni3(Si,Ti) with 2 at% Cr was found to be higher than that of Ni3(Si,Ti) with at% Al. In addition, the presence of high concentration for oxygen indicates the occurrence of pit formation.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6756
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3112
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Methane Emission from Digestion of Palm Oil Mill Effluent (POME) in a Thermophilic Anaerobic Reactor
Irvan, I
Trisakti, Bambang
Wongistani, Vivian
Tomiuchi, Yoshimasa
As the issue of global warming draws increasing concern, many studies to reduce CO2 and CH4 gases (greenhouse gases, GHG) have been implemented in several countries, including in Indonesia. Considering that Indonesia has a huge numbers of palm oil mills, no doubt if their waste water treatment as one of the major sources in GHG. This paper presents the results from a research project between Metawater Co., Ltd.-Japan and University of Sumatera Utara-Indonesia. The objective of the research is to study the methane emission of thermophilic fermentation in the treatment of palm oil mill effluent (POME) on a laboratory scale. Anaerobic digestion was performed in two-litre water jacketed biodigester type continuous stirred tank reactor (CSTR) and operated at a thermophilic temperature (55 oC). As raw material, a real liquid waste (POME) from palm oil mill was used. Fresh POME was obtained from seeding pond of PTPN II waste water treatment facility which has concentration of 39.7 g of VS/L and COD value of 59,000 mg/L. To gain precise results, complete recording and reliable equipment of reactor was employed. As the experimental results, for hydraulic retention time (HRT) 8 days, VS decomposition rate of 63.5% and gas generation of 6.05-9.82 L/day were obtained, while for HRT 6 and 4 days, VS decomposition rate of 61.2, 53.3% and gas generation of 6.93-8.94 and 13.95-16.14 L/day were obtained respectively.
Keywords—methane (CH4), palm oil mill effluent (POME), anaerobic digestion, thermophilic, green house gases (GHG)
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3112
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4065
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121025 2012 eng "
2302-5743
2086-5023
dc
Strategy of Quality Improvement of Pond Shrimp Post Harvest Management (Penaeus monodon Fabricius) in Mahakam Delta (Case Study)
Noor Asikin, Andi
Fisheries and Marine Science Faculty of Mulawarman University, Jl. Gunung Tabur Kampus Gunung Kelua Samarinda 75119
Hutabarat, S.
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang 50275
Darmanto, Y. S.
Fisheries and Marine Science Faculty of Diponegoro University, Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang 50275
Prayitno, S. B.
Mahakam Delta area, which is situated in Kutai Kartanegara Regency, has become a pond center that gives a significant contribution to shrimp export of East Kalimantan Province. Pond-produced shrimps, however, do not always accord to the intention of cold storage companies at expected price. The companies even sometimes reject the request due to poor quality of the product. The decreasing shrimp quality may be due to maintenance process by the pond farmers as well as the improper collectors. In the other hand, importing countries have decided more and more restricted requirements for the imported fishing products. This study was held in Muara Jawa, Anggana, and Muara Badak Districts using techniques of data collection of in-depth interview with twelve respondents. In order to improve shrimp quality, farmers or the producers have to formulate a strategy towards the improvement of the post harvest shrimps from the pond using an Analytical Hierarchy Process (AHP). Results of the AHP consist of as follows: (1) application of pond shrimp post harvest technology and improvement of facilities and accommodation that support the quality improvement of the pond shrimps, (2) human resource quality improvement of pond farmers, collectors, and field instructors, (3) development of pond culture by applying best practices principle and local policies in order to improve the quality of the pond shrimps, and (4) improvement of interagency coordination, monitoring, and evaluation to enhance the pond shrimp quality
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4065
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7197
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Comparative Analysis of Data Mining Classification Algorithms in Type-2 Diabetes Prediction Data Using WEKA Approach
Ahmed, Kawsar
Mawlana Bhashani Science and Technology University, Santosh, Tangail-1902
Jesmin, Tasnuba
Daffodil International University, Sukrabad, Dhanmondi, Dhaka
Array
The goal of this paper discusses about different types of data mining classification algorithms accuracies that are widely used to extract significant knowledge from huge amounts of data. Here illustrate 20 classifications of supervised data mining algorithms base on type-2 diabetes disease dataset perspective to Bangladeshi populations. In this paper we compare 20 classification algorithms by measuring accuracies, speed and robustness of those algorithms using WEKA toolkit version 3.6.5. Accuracies of classification algorithms are measured in 3 cases like Total Training data set, 10 fold Cross Validation and Percentage Split (66% taken). Speed (CPU Execution Time) and error rate also measured as like as accuracy. Firstly checked top perform algorithms that have best outcome for different cases and then ranked top outcomes algorithms. Finally ranked best 5 algorithms among 20 algorithms based on their accuracies.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7197
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4475
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130206 2013 eng "
2302-5743
2086-5023
dc
A Novel Approach to Communicate Secret Message between Users Using Sponge Function Technique on NTRU
Varaprasad, S.
Dept.of Computer Science & Systems Engineering Andhra University,Visakhapatnam
Rao, K.Venkata
Avadhani, P.S.
Sponge function; NTRU; encryption; decryption; Keydistributioncenter (KDC) Absorbing; Squeezing functions
This paper presents a novel approach for a (key distribution) for secret message communication among a group (G). In order to increase security to distribute secret message (key), we introduce sponge functions using these at a specific permutation. We generate a key and distribute this key using (PKCS)(public key crypto systems), the absorbing, squeezing functions are used. In this paper an introduction part which briefs regarding sponge functions, key distribution centre, group communication and NTRU, key generation authentication, in literature review we describe about the research states of sponge functions, lightweight hash functions-KDC – NTRU. In proposed work we propose how the group communication establishes registration of users, entry and exit of a user. The encryption and decryption algorithm are used between sender and receiver. The entire proposed work is verified in VHDL and ‘MATLABS’.
doi: http://dx.doi.org/10.12777/ijse.4.2.2013.44-51
[How to cite this article: Varaprasad, S., Rao, K. V., & Avadhani, P. S. (2013). A Novel Approach to Communicate Secret Message between Users Using Sponge Function Technique on NTRU. INTERNATIONAL JOURNAL OF SCIENCE AND ENGINEERING, 4(2), 44-51; doi: http://dx.doi.org/10.12777/ijse.4.2.2013.44-51]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/4475
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7941
2015-11-20T09:43:11Z
ijse:ART
nmb a2200000Iu 4500
"150715 2015 eng "
2302-5743
2086-5023
dc
Prediction of Weekly Rainfall in Semarang City Use Support Vector Regression (SVR) with Quadratic Loss Function
Prahutama, Alan
Statistics Department, Diponegoro University
Yasin, Hasbi
Statistics Department, Diponegoro University
Array
Semarang city is one of the busiest city in Indonesia. Doe to its role as the capital city of Central Java, Semarang is known as having a relativity high rate economic activities. The geographic of Semarang city bordered by the Java sea, thus whenever the rainfall is high, there could be flood at certain area. Therefore, prediction of rainfall is very important. Support vector machine (SVM) is one of the most popular methods in nonlinear approach. One of the branches of this method for prediction is support vector regression (SVR). SVR can be approached by quadratic loss function. The study is focus on Semarang rainfall prediction during 2009 to 2013 using several kernel function. Kernel Function can provide optimal weight Some of kernel functions are linear, polynomial, and Radial Basis Function (RBF). Using this method, the study provide 71.61% R-square in the training data, for C parameter 2 with polynomial (p=2), and 71.46% R-square for the testing data
Chemical Engineering Diponegoro University
2015-11-07 22:26:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7941
International Journal of Science and Engineering; Vol 9, No 1 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5099
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Physiological Process of Acacia mangium Willd. Plant of Six Months Old Attacked by Black Spots Disease in PT Itci Hutani Manunggal Terunen
Syahfari, Helda
Faculty of Agriculture, University of 17 Agustus 1945, Samarinda
Bratawinata, Ach. Arieffin
Faculty of Forestry Mulawarman University, Campus Gunung Kelua, Samarinda
Sutisna, Maman
Faculty of Forestry Mulawarman University, Campus Gunung Kelua, Samarinda
Mardji, Djumali
Faculty of Forestry Mulawarman University, Campus Gunung Kelua, Samarinda
Array
The purposes of this study were to determine symptoms and signs of black spot disease on mangium plants of 6 months old, frequency of the attacks and their effects on physiological processes of affected phyllode (amount of chlorophyll, transpiration, evaporation and water potential of phyllode). Fieldwork was conducted in the research plots measuring 25 m x 25 m) in mangium plantation. Observed plants were 6 months old amounted to 104 plants at a spacing of 3 m x 2 m, the seedlings were originated from Riau Islands. Plants were observed in the census in research plots .The results showed that the black spot disease was caused by a fungus Meliola brisbanensis with symptoms of black spots on phyllode, where the spots occured more on the upper surface than the lower surface. Other than phyllode, young part of the stem was also attacked. Attacked phyllode changed in color from green to yellow (chlorotic). Frequency of attacks on plot of 6 months old was 62.5%. The amount of chlorophyll in phyllode attacked by black spot fungus was 40.8 Spad. Transpiration velocity had the value of 1284.26 gr/dm2/second, evaporation rate of 0.00019 μgcm2/minute. Water potential of phyllode at 08:00 to 10:00 a.m was 18 bars, at 12:00 a.m to 14:00 p.m 21.2 bars and at 4:00 p.m. to 6:00 p.m. was 9 bars. Environmental factors that influence the physiological process of black spot fungus were soil pH, irradiation intensity, water content of soil and were influenced by factors inside of the black spot disease itself.
Doi: 10.12777/ijse.5.1.15-18
[How to cite this article: Syahfari, H., Bratawinata, A.A., Sutisna, M. and Mardji, D. (2013). Physiological Process of Acacia mangium Willd. Plant of Six Months Old Attacked by Black Spots Disease in PT ITCI Hutani Manunggal Terunen. International Journal of Science and Engineering, 5(1),6-11. Doi: 10.12777/ijse.5.1.15-18 ]
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5099
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/8070
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
THE EFFECT OF ANNEALING TEMPERATURES AFTER THERMOMECHANICAL PROCESS TO THE CORROSION BEHAVIOR OF Ni3(Si,Ti) IN SULFATE SOLUTION
Priyotomo, Gadang
Research Center for Metallurgy and Material, Indonesian Institute of Sciences, Serpong, Tangerang
Kaneno, Yasuyuki
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
1-1 Gakuen-cho, Sakai, Osaka
Array
The corrosion behaviour of the intermetallic compounds Ni3(Si,Ti) (L12: single phase), has been investigated using an immersion test, polarization method, scanning electron microscope in 0.5 kmol/m3 H2SO4 solution at 303 K. Moreover, the corrosion behaviour of austenitic stainless steel type 304 was studied under the same experimental conditions as reference. It was found that the intergranular attack and uniform attack were observed on Ni3(Si,Ti) after thermomechanical and annealing processes (1173K and 1273K) respectively in the immersion test. From the immersion test and polarization curves, all annealed Ni3(Si,Ti) had less corrosion resistance compared to type 304. In addition, Ni3(Si,Ti) was difficult to form a stable passive film, but not for type 304.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8070
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5511
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Study of Biometric Identification Method Based on Naked Footprint
Rafiu King, Raji
School of Electronic and Information Engineering, Lanzhou Jiaotong University
Xiaopeng, Wang
School of Electronic and Information Engineering, Lanzhou Jiaotong University
Array
The scale of deployment of biometric identity-verification systems has recently seen an enormous increase owing to the need for more secure and reliable way of identifying people. Footprint identification which can be defined as the measurement of footprint features for recognizing the identity of a user has surfaced recently. This study is based on a biometric personal identification method using static footprint features viz. friction ridge / texture and foot shape / silhouette. To begin with, naked footprints of users are captured; images then undergo pre processing followed by the extraction of two features; shape using Gradient Vector Flow (GVF) snake model and minutiae extraction respectively. Matching is then effected based on these two features followed by a fusion of these two results for either a reject or accept decision. Our shape matching feature is based on cosine similarity while the texture one is based on miniature score matching. The results from our research establish that the naked footprint is a credible biometric feature as two barefoot impressions of an individual match perfectly while that of two different persons shows a great deal of dissimilarity.
Doi: 10.12777/ijse.5.2.29-35
How to cite this article: King, R.R. and Xiaopeng, W. (2013). Study of Biometric Identification Method Based on Naked Footprint . International Journal of Science and Engineering, 5(2),18-24. Doi: 10.12777/ijse.5.2.29-35]
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5511
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9769
2016-02-06T11:14:37Z
ijse:CIV
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
CONGESTION AS A RESULT OF SCHOOL AND SHOPPING CENTER ACTIVITY
Kumaat, Meike
Faculty of Engineering, Diponegoro University
Mulyono, Agus Taufik
Sjafruddin, Ade
Faculty of Engineering, Institut Teknologi Bandung
Setiadji, Bagus Hario
Faculty of Engineering, Diponegoro University
Array
Development of land use in public facilities such as shopping center and school gives an impact on transportation problem in Manado City, North Sulawesi. To determine factors which have causal relationship with congestion as a result of school and shopping center activity then it need to be assessed and studied. Descriptive study with observational survey was used in this study. The study ran Structural Equation Modelling (SEM) by using AMOS program. Estimated method was used to calculate sample size then found 300 repondents, comprised : visitors and mall managers, school visitors, parents, school managers, Public Works department, and urban planning department .The study yielded a statistically significant correlation between school and shopping center activity with congestion s. The result indicated that school activity was positively related to congestion with p value at p=0,000 (p ≤ 0,05). Shopping center activity was positively related to congestion with p value at p=0,000 (p ≤ 0,05). The closer proximity from school to shooping center will causes severe traffic congestion. The relationship between school facility with proximity was found in p value at p=0,000 (p ≤ 0,05) . The relationship between shopping center facility with proximity was found in p value at p= 0,020 (p ≤ 0,05). While, the relationship between proximity with congestion was p= 0,008 (p ≤ 0,05). Monastery school and Mega Mall activity were affecting congestion because a closer proximity of two facilities. This indicates that the occurence of traffic congestion in Monastery School may be dependent on existence of Piere Tendean road link
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/9769
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5657
2013-11-03T22:28:15Z
ijse:EDT
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Front Cover
Editor, IJSE
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Front cover
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5657
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1234
2012-08-23T08:12:44Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Biogas Production From Cassava Starch Effluent Using Microalgae As Biostabilisator
Budiyono, B.
Department of Chemical Engineering, Diponegoro University Semarang
Kusworo, Tutuk Djoko
Department of Chemical Engineering, Diponegoro University Semarang
The rapid growing of Indonesian population is emerging several critical national issues i.e. energy, food, environmental, water, transportation, as well as law and human right. As an agricultural country, Indonesia has abundant of biomass wastes such as agricultural wastes include the cassava starch wastes. The problem is that the effluent from cassava starch factories is released directly into the river before properly treatment. It has been a great source of pollution and has caused environmental problems to the nearby rural population. The possible alternative to solve the problem is by converting waste to energy biogas in the biodigester. The main problem of the biogas production of cassava starch effluent is acid forming-bacteria quickly produced acid resulting significantly in declining pH below the neutral pH and diminishing growth of methane bacteria. Hence, the only one of the method to cover this problem is by adding microalgae as biostabilisator of pH. Microalgae can also be used as purifier agent to absorb CO2.The general objective of this research project was to develop an integrated process of biogas production and purification from cassava starch effluent by using biostabilisator agent microalgae. This study has been focused on the used of urea, ruminant, yeast, microalgae, the treatment of gelled and ungelled feed for biogas production, pH control during biogas production using buffer Na2CO3, and feeding management in the semi-continuous process of biogas production. The result can be concluded as follows: i) The biogas production increased after cassava starch effluent and yeast was added, ii) Biogas production with microalgae and cassava starch effluent, yeast, ruminant bacteria, and urea were 726.43 ml/g total solid, iii) Biogas production without microalgae was 189 ml/g total solid.
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1234
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/17535
2019-04-23T22:04:33Z
ijse:ART
nmb a2200000Iu 4500
"190415 2019 eng "
2302-5743
2086-5023
dc
Broad inhibition of transmission frequency in multilayered dielectric one dimensional photonic crystal nanostructure
CHACKO, VINOD
Department of Humanities and Applied Sciences
YMCA University of Science and Technology https://orcid.org/0000-0003-3263-8028
Bansal, Sonia
Department of Humanities and Applied Sciences
YMCA University of Science and Technology
FARIDABAD
HARYANA
INDIA
Hafiz, Aurangzeb khurram
Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, India
Array
We report the omnidirectional reflection (ODR) in one dimensional photonic crystal (PC) structure consisting of alternate layers of Cryolite (Na3AlF6) as material of low refractive index and Germanium (Ge) as material of high refractive index. The effects of the thickness of layers and incidence angles on the spectral reflectance have been investigated using transfer matrix method (TMM). The proposed structure gives broad inhibition of transmission frequencies within a wide range of wavelengths in the visible-near IR region (600 nm- 850 nm) which can be tuned according to the design parameters. We observe that cryolite based photonic crystal structure can be used as a good candidate for wavelength filter or broad reflector in the near infrared spectrum which is very useful in many imaging sensors in the field of optical technology
Chemical Engineering Diponegoro University
2019-04-19 17:53:09
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/17535
International Journal of Science and Engineering; Vol 13, No 1 (2019)
eng
Copyright (c) 2019 International Journal of Science and Engineering
oai:ojs.ejournal.undip.ac.id:article/6247
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
DRYING TIME ESTIMATION OF CARRAGEENAN-EGG WHITE MIXTURE AT TRAY DRYER
Djaeni, Mohamad
Department of Chemical Engineering
Faculty of Engineering
Diponegoro University http://gmail.com
Prasetyaningrum, Aji
Department of Chemical Engineering
Faculty of Engineering
Diponegoro University
Asiah, Nurul
Master Student of Magister Program on Chemical Engineering
Department of Chemical Engineering
Faculty of Engineering
Diponegoro University
Hartono, Ratnawati
Department of Chemical Engineering
Faculty of Engineering
Diponegoro University
Array
The drying is the last step to find carrageenan product. Currently, the carrageenan drying still deals with too long drying time. This because, during the process carrageenan and water forms gel stucture in which hampers the water diffusion to the surface. Foaming agent introduction such as egg white can be considered to break the gel structure and make the drying process being smooth and fast. This paper discusses the effect of egg white as foaming agent on the drying time of carrageenan. In this study, the carrageenan was mixed with egg white to form foam that can break the gel and create the pore for improving the surface area. The carrageenan and egg white mixture was then dried at different air temperature and humidity. Results showed that the drying time was shortened with the presence of egg whiet as well as the increase of air temperature. For example, the drying time at air temperature 80oC with 20 % egg white was about 60 minutes shorter than that of without foam. In addition, the lowering air dehumidification affected the drying time positively.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6247
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/1263
2012-01-14T21:23:30Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Influence of Silica/Sulfonated Polyether-Ether Ketone as Polymer Electrolyte Membrane for Hydrogen Fueled Proton Exchange Membrane Fuel Cells
Handayani, Sri
Chemical Engineering Departement – Institute Technology of Indonesia. Jl. Raya Puspiptek Serpong, Tangerang
Listiani Dewi, Eniya Listiani Dewi
Agency for the Assessment and Application of Technology, Center of Materials Technology
BPPT Gd. II, Lt. 22, Jl. M.H. Thamrin 8 Jakarta
The operation of non-humidified condition of proton exchange membrane fuel cell (PEMFC) using composite sPEEK-silica membrane is reported. Sulfonated membrane of PEEK is known as hydrocarbon polyelectrolyte membrane for PEMFC and direct methanol fuel cell (DMFC). The state of the art of fuel cells is based on the perluorosulfonic acid membrane (Nafion). Nafion has been the most used in both PEMFC and DMFC due to good performance although in low humidified condition showed poor current density. Here we reported the effect of silica in hydrocarbon sPEEK membrane that contributes for a better water management system inside the cell, and showed 0.16 W/cm2 of power density which is 78% higher than that of non-silica modified [Keywords: composite membrane, polyether-ether ketone, silica, proton exchange membrane fuel cell].
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1263
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5588
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
Evaluation of conductive polymers as an adsorbent for eradication of As (III) from aqueous solution using inductively coupled plasma optical emission spectroscopy (ICP-OES)
Din, Muhammad Imran
Institute of Chemistry,University of the Punjab,Lahore
Ata, Sadia
1. Institute of Chemistry, University of Punjab, Lahore-54590, Pakistan
Mohsin, Ijaz Ul
Department of Chemistry, University of Engineering & Technology, Lahore
Rasool, Ata
PhD scholar
Institute of Chemistry,University of the Punjab,Lahore
Andleeb Aziz, Andleeb
PhD scholar
Institute of Chemistry,University of the Punjab,Lahore
Array
The main focused of this research work is the preparation of conductive polymers like polypyrrole, polyaniline and polythiophene and their application as adsorbent materials for the removal of hyper toxic metal As (III) from aqueous solution. The metal ions get attached on the π-electrons at the back bone of polymer that illustrate excellent affinity for metal ions. The adsorption of As (II) ions was carried out on polythiophene due to its redox properties and the stronger interaction between sulfur atoms with arsenic atoms. To attain large surface area and for maximum interaction of As (III) ions with polymers, the particle size of polymers was ranged in nano scale. As the surface area increases with decrease in particle size, the active sites for metal ions also increases. These polymers were characterized by FIIR spectroscopy and SEM analysis.
Adsorption isothermal data was examined by two parameters (Langmuir, Freundlich, and Dubinin-Radushkevich) and three parameters Redlich-Petrson, Sips and Toth models. Experimental results showed that based on standard deviation (SD) and Chi square test (χ2) the experimental data was best explained by Freundlich and Toth isotherm. Thermodynamics parameters such as free energy change (ΔG0), enthalpy change (ΔH0) and entropy change (ΔS0) have been calculated respectively, which revealed the spontaneous, endothermic and feasible nature of adsorption process.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5588
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/3006
2012-04-29T18:09:27Z
ijse:ART
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
On the New Algorithm of Testing and Comparing Size Corrected Powers for Testing Multivariate Normality
Rani Dey, Sima
Dept. of Computer Science and Engineering, Daffodil International University
Majumder, A.K.
Parametric models are mainly based on univariate or multivariate normality assumptions. Uniformly most powerful (UMP) test is not available to test multivariate normality. In such a situation, optimal test can be used. But, a very few literature is available on the size corrected power comparison of different multivariate normality tests. In this paper, we propose an algorithm to compare the size corrected powers for testing univariate or multivariate normality. The algorithm can be applied to any existing univariate and multivariate tests, which is the most attractive feature of the proposed new algorithm. We also propose a Cholesky decomposition of the variance-covariance matrix based test, which is simpler than the existing test. Our Monte Carlo simulation study indicates that our proposed and existing tests perform equally in terms of power properties.
Keywords— Cholesky decomposition, UMP test, Optimal test, Monte Carlo.
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/3006
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7102
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
Analysis of Causality Relationship of Components of Socio-ecological and Socio-economical System for Management of the Outermost Small Islands: A Case of Lingayan Island, Central Sulawesi
Saleh Lubis, Mohammad
Marine and Fisheries Agency of Central Sulawesi, Palu
Nur Bambang, Azis
Deparment of Fisheries, Faculty of Fisheries and Marine Science,
Diponegoro University, Semarang
Hutabarat, Sahala
Deparment of Fisheries, Faculty of Fisheries and Marine Science,
Diponegoro University, Semarang
Prayitno, Slamet Budi
Deparment of Fisheries, Faculty of Fisheries and Marine Science,
Diponegoro University, Semarang
Array
Indonesia has more than 17,506 islands and 92 islands of them are outermost small islands. Lingayan is one of them located in Northwest of Sulawesi Island and it has geostrategic role to determine the sea boundaries of Indonesian State (NKRI) including the territorial seas, the exclusive economic zone and the continental shelf. Recently, the coastal ecosystems of Lingayan has degraded and the island’s economy is weak so they cannot support the life’s survival of inhabiting people. This condition could weaken the geostrategic role in accordance with article 121 Chapter VIII of the United Nations Convention on the Law of the Sea (UNCLOS). Based on the above reasons, the study aim to examine and assess the causal relation of components in the socio-ecological and socio-economical systems as a basis for management of the Lingayan Island with target on conservation of coastal ecosystems and growth of inhabitant’ business economic. Causalities relations within components were built using Statistic Equation Model (SEM) with AMOS method and 40 constructed indicators as well as determinate the suitability program using Analytical Hierarchy Process (AHP). The research showed that there is relationship between the components of socio-ecological systems as indicated by the fit model of causal relation path diagram that provides chi square value = 236.994, RMSEA = 0.083, GFI = 0.884. Furthermore, there is relationship between the components of socio-economical that provides chi square value = 192.824, RMSEA = 0.081, GFI = 0.900. The most appropriate programs are seaweed cultivation (34.0%) and restoration (23.4%).
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7102
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7627
2015-01-11T12:13:02Z
ijse:ART
nmb a2200000Iu 4500
"141015 2014 eng "
2302-5743
2086-5023
dc
Taro Tube Flour Modification via Hydrogen Peroxide Oxidation
Budiyati, Catarina Sri
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Ariyanti, Dessy
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Colocasia esculentum (L) Schott known as “Talas bogor” in Indonesian language is easily grown in every island in Indonesia. It proved to have high content of carbohydrate as it can be utilize for wheat flour replacement in addition to prior modification using hydrogen peroxide. The objective of this research was to improve the quality of taro flour by assessing the effect of several parameter such as ratio of slurry, oxidation agent concentration, oxidation time and temperature. The result shows that using ratio of slurry 20% with 2% of H2O2 concentration in temperature of oxidation process 30oC and 60 min operation time can produced good quality of modified taro tube flour in terms of swelling power and water solubility with 7.2 g/g and 6.93% respectively. This condition has chosen by taking the technical and economic feasibility as consideration. This result also can be used as proof of evidence that using H2O2 as an oxidizing agent in the process of taro tube flour modification can improve the functional properties of the flour. As the swelling power and water solubility of original taro tube flour were 3.7 g/g and 1.8% respectively.
Chemical Engineering Diponegoro University
2014-10-06 13:02:01
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7627
International Journal of Science and Engineering; Vol 7, No 2 (2014)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4286
2012-12-31T07:26:51Z
ijse:ART
nmb a2200000Iu 4500
"121216 2012 eng "
2302-5743
2086-5023
dc
Sliding Wear Modeling of Artificial Rough Surfaces
Syafa’at, Imam
Lab. for Surface Technology and Tribology, Faculty of Engineering Technology, University of Twente.
Drinerloolaan 5, Postbus 217, 7500 AE, Enschede, The Netherlands
Setiyana, Budi
Muchammad, Muchammad
Jamari, Jamari
Surface roughness plays an important role in machine design. In the micro-scale when two engineering surfaces are brought into contact, the real contact area occurs at isolated point of asperity. Wear is one of some effects of contacting surfaces. This paper presents a modeling of sliding wear at asperity level on the artificial rough surfaces. The surface roughness is represented by spherical asperities at the hemispherical pin that is developed from the existing model. The wear model is based on the simple analytical solution. The combination of Archard’s wear equation and finite element simulation is performed to predict the wear. Results show that the increasing of sliding distance give the increasing of wear depth, wear scar diameter and wear volume of the asperity. Wear at the center of the contacting rough surface is higher than the its surrounding.
[Keywords: Rough Surface; Sliding Wea; Wear Scar Diameter; Wear Volume]
Chemical Engineering Diponegoro University
2012-12-16 11:16:13
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4286
International Journal of Science and Engineering; Vol 4, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/7932
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
Modelling of HTR (High Temperature Reactor) Pebble-Bed 10 MW to Determine Criticality as A Variations of Enrichment and Radius of the Fuel (Kernel) With the Monte Carlo Code MCNP4C
Oktajianto, Hammam
University of Diponegoro
Department of Physics
Setiawati, Evi
University of Diponegoro
Richardina, Very
University of Diponegoro
Array
Gas-cooled nuclear reactor is a Generation IV reactor which has been receiving significant attention due to many desired characteristics such as inherent safety, modularity, relatively low cost, short construction period, and easy financing. High temperature reactor (HTR) pebble-bed as one of type of gas-cooled reactor concept is getting attention. In HTR pebble-bed design, radius and enrichment of the fuel kernel are the key parameter that can be chosen freely to determine the desired value of criticality. This paper models HTR pebble-bed 10 MW and determines an effective of enrichment and radius of the fuel (Kernel) to get criticality value of reactor. The TRISO particle coated fuel particle which was modelled explicitly and distributed in the fuelled region of the fuel pebbles using a Simple-Cubic (SC) lattice. The pebble-bed balls and moderator balls distributed in the core zone using a Body-Centred Cubic lattice with assumption of a fresh fuel by the fuel enrichment was 7-17% at 1% range and the size of the fuel radius was 175-300 µm at 25 µm ranges. The geometrical model of the full reactor is obtained by using lattice and universe facilities provided by MCNP4C. The details of model are discussed with necessary simplifications. Criticality calculations were conducted by Monte Carlo transport code MCNP4C and continuous energy nuclear data library ENDF/B-VI. From calculation results can be concluded that an effective of enrichment and radius of fuel (Kernel) to achieve a critical condition was the enrichment of 15-17% at a radius of 200 µm, the enrichment of 13-17% at a radius of 225 µm, the enrichments of 12-15% at radius of 250 µm, the enrichments of 11-14% at a radius of 275 µm and the enrichment of 10-13% at a radius of 300 µm, so that the effective of enrichments and radii of fuel (Kernel) can be considered in the HTR 10 MW.
Keywords—MCNP4C, HTR, enrichment, radius, criticality
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/7932
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/7932/17315
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/4745
2013-04-17T00:30:05Z
ijse:EDT
nmb a2200000Iu 4500
"130417 2013 eng "
2302-5743
2086-5023
dc
Editorial (Table of Content, Editorial Board, Preface)
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
editorial
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4745
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/8480
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
2302-5743
2086-5023
dc
Fabrication and Characterization of Polyimide-CNTs hybrid membrane to enhance high performance CO2 separation
Kusworo, Tutuk Djoko
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Budiyono, Budiyono
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Ismail, Ahmad Fauzi
Advanced Membrane Research Technology Center (AMTEC) Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia
Mustafa, Azeman
Advanced Membrane Research Technology Center (AMTEC) Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia
Array
This study investigates the CO2 separation performance of a hybrid membranes flat sheet based on polyimide incorporated with carbon nanotubes (CNTs) particles. CNTs was selected and its loading were a 1 wt% in total solid. The hybrid composite membranes were fabricated in order to increase their separation performance for the gaseous mixture of CO2 and CH4. Hybrid Composite membrane incorporated carbon nanotubes were mannufactured by the dry-wet phase inversion technique using flat sheet membrane casting machine system, in which the CNTs were embedded into the polyimide membrane and the resulting membranes were characterized. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Sieve-in-a-cage’ morphology observed shows the poor adhesion between polymer and unmodified CNT. The results revealed that the good multi-wall carbon nanotubes dispersion leads to enhanced gas permeation properties. It is also concluded that addition of carbon nanotubes particles into the matrix of Polyimide polymer has significant effect on the membrane structure and properties.
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8480
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5331
2013-08-07T10:02:40Z
ijse:BACK
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
2086-5023
dc
Instruction for Authors
Editor, Support
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Array
Instruction for Authors
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5331
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/9663
2016-02-06T11:14:37Z
ijse:AGR
nmb a2200000Iu 4500
"151015 2015 eng "
2302-5743
2086-5023
dc
The Application of Integrated Multi Trophic Aquaculture (IMTA) Using Stratified Double Net Rounded Cage (SDFNC) for Aquaculture Sustainability
Putro, Sapto P.
aDepartment of Biology, Faculty of Sciences and Mathematics, Diponegoro University
Widowati, Widowati
bDepartment of Mathematics, Faculty of Sciences and Mathematics, Diponegoro University
Suhartana, Suhartana
Department of Chemistry, Faculty of Sciences and Mathematics, Diponegoro University
Muhammad, Fuad
Department of Biology, Faculty of Sciences and Mathematics, Diponegoro University
Array
The increase of fishery production nationally and internationally may impact on the potential emergence of a variety of environmental problems. The application of sustainable aquaculture is urgently needed by breeding fish for commercial purposes in a manner such that it has a minimum impact on the environment, contributing to the development of local communities and generating economic benefits. The design of the cage and farming practice in aquaculture activities are the important steps to ensure that farming activity is still observed in order to anticipate the risk of organic enrichment caused by the activities. The application of Integrated Multi-Trophic Aquaculture (IMTA) on the Stratified Double Floating Net Cage (SDFNC) integrated with biomonitoring are an appropriate solution to the ongoing productive farming practices. IMTA is an aquaculture practice using more than one species of biotas which have ecologically mutual relationship as a part of the food chain in the area at the same time. The application of IMTA allows farmers to get several aquaculture products in the same area without increasing the horizontal area of the farms. At first, the SDFNC has been applied for farming Cyprinus carpio and Tilapia niloticus as polyculture system in freshwater ecosystem of Rawapening Lake, Central Java. Its operation has been able to increase the production capacity of at least 75% of conventional cages. The application of SDFNC-IMTA using milkfish (Chanos Chanos), seaweed (Kappaphycus alvarezii), and white shrimp (Litopenaeus vannamei) has been able to minimize the impact and maintain the water ecosystem in the Gulf Awerange, South Sulawesi.
Chemical Engineering Diponegoro University
2015-12-08 08:47:59
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https://ejournal.undip.ac.id/index.php/ijse/article/view/9663
International Journal of Science and Engineering; Vol 9, No 2 (2015)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/5601
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
2086-5023
dc
Application of Response Surface Methodology in Extraction of Bioactive Component from Palm Leaves (Elaeis guineensis)
Arham, Nur Afiqah
Department of Chemical Engineering, Universiti Teknologi MARA, Shah Alam
Mohamad, Nurul Amal Nadhirah
Department of Chemical Engineering, Universiti Teknologi MARA, Shah Alam
Jai, Junaidah
Department of Chemical Engineering, Universiti Teknologi MARA, Shah Alam
Krishnan, Jagannathan
Department of Chemical Engineering, Universiti Teknologi MARA, Shah Alam
Yusof, Noorsuhana Mohd
Department of Chemical Engineering, Universiti Teknologi MARA, Shah Alam
Array
The hydroxyl groups of the polyphenols are capable to act as reducing agent for reduction reaction. The effect of drying temperature, extraction temperature and extraction duration were evaluated using central composite design which consists of 20 experimental runs. Response surface methodology (RSM) was used to estimate the optimum parameters in extracting polyphenols from the palm leaves. The correspondence analysis of the results yielded a quadratic model which can be used to find optimum conditions of extraction process. The optimum extraction condition of drying temperature, extraction temperature and extraction duration are 70°C, at 70°C of 10 minutes, respectively. Total polyphenols were determined by application of the Folin-Ciocalteu micro method and the extract was found contain of 8 mg GAE/g dry palm leaves at optimum conditions.
Doi: 10.12777/ijse.5.2.95-100
[How to cite this article: Arham, N.A., Mohamad, N.A.N., Jai, J., Krishnan, J., Noorsuhana Mohd Yusof, N.M. (2013). Application of Response Surface Methodology in Extraction of Bioactive Component from Palm Leaves (Elaeis guineensis). International Journal of Science and Engineering, 5(2),95-100. Doi: 10.12777/ijse.5.2.95-100
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/5601
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/1228
2012-01-03T11:12:42Z
ijse:ART
nmb a2200000Iu 4500
"111211 2011 eng "
2302-5743
2086-5023
dc
The influence of Palm Kernel Cake and Rice Bran Fermentation Product Mixture to the Broiler Carcass Quality
Priabudiman, Yadi
Animal Husbandry-Lampung State Polytechnic, Jl.Soekarno-Hatta 10, Bandar Lampung, Indonesia
Sukaryana, Yana
Animal Husbandry-Lampung State Polytechnic, Jl.Soekarno-Hatta 10, Bandar Lampung, Indonesia
The purpose of this research was to study the effect of the use of palm kernel cake (PKC) and rice bran (RB) fermentation products mixture to the percentage of broiler carcass weight pieces. Research using completely randomized design (CRD) with treatments of the fermentation product usage rate of 0% (P0), 10% (P1), 20% (P2), 30% (P3) and 40% (P4) of the total ration of 4replications. Variables measured were percentage of carcass weight ratio cut pieces of carcass weight (carcass front, rear carcass, breast meat, wings, back, and thigh) with carcass weight multiplied by 100%. The results showed that the percentage of carcass weight piece front and rear carcass was shown at P3.
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1228
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/12095
2018-01-17T08:30:49Z
ijse:ART
nmb a2200000Iu 4500
"160415 2016 eng "
2302-5743
2086-5023
dc
The Role of Calcium and Glucose on the Increasing of Parasitemia Value and Hemolysis into Plasmodium falciparum-infected Erythrocyte
Asfirizal, Verry
Laboratory of Parasitology, Faculty of Medicine, Mulawarman University, Jl. Krayan Kampus Gunung Kelua Samarinda
Array
Erythrocyte infected by Plasmodium experiences various changes of shape and function. The permeability increases upon various dissolved material including amino acid, glucose, vitamin, nucleotide, purine, anion/cation and organic/inorganic and also others simple dissolved materials such as sorbitol, choline and chloride-ion. The increasing of permeability is very needed by Plasmodium to provide nutrients for internal growth. The objectives of this research were to determine the increasing of parasitemia value and hemolysis on erythrocyte infected by Plasmodium falciparum. The medium culture used for growing Plasmodium falciparum was RPMI 1640 that produced parasitemia 15%, inoculation was conducted to produce sub-culture that produced parasitemia 20% and divided into calcium, glucose and control (CM 10%) treatment with 3 times replications. Observation was conducted from the first day to sixth day after treatment. Parasitemia and hemolysis parameters as growth indicators were observed. Difference among treatments groups were analyzed using ANOVA and followed by Duncan Multiple Range Test (DMRT α=0.05). The result showed that the application of calcium + glucose produced the highest number of parasitemia (11.87±4.71) (means ±SD) and hemolysis (0.278+0.012) compared with others applications i.e. calcium, glucose and control medium culture (10% CM). This application produced significant difference (p<0.05). It was concluded that calcium and glucose had important to increase parasitemia and hemolysis of Plasmodium falciparum-infected erythrocyte
Chemical Engineering Diponegoro University
2016-08-03 19:40:16
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https://ejournal.undip.ac.id/index.php/ijse/article/view/12095
International Journal of Science and Engineering; Vol 10, No 2 (2016)
eng
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oai:ojs.ejournal.undip.ac.id:article/6018
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
2302-5743
2086-5023
dc
Parameterization adaption for 3D shape optimization in aerodynamics
El Majd, Badr Abou
Department of mathematics and computer science, Hassan II University
B.P. 5366 Maârif, Casablanca
Array
When solving a PDE problem numerically, a certain mesh-refinement process is always implicit, and very classically, mesh adaptivity is a very effective means to accelerate grid convergence. Similarly, when optimizing a shape by means of an explicit geometrical representation, it is natural to seek for an analogous concept of parameterization adaptivity. We propose here an adaptive parameterization for three-dimensional optimum design in aerodynamics by using the so-called “Free-Form Deformation” approach based on 3D tensorial Bézier parameterization. The proposed procedure leads to efficient numerical simulations with highly reduced computational costs.
[How to cite this article: Majd, B.A.. 2014. Parameterization adaption for 3D shape optimization in aerodynamics. International Journal of Science and Engineering, 6(1):61-69. Doi: 10.12777/ijse.6.1.61-69
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6018
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1285
2012-01-14T21:23:30Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Aims and Scope
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Aims and Scope
Chemical Engineering Diponegoro University
2011-12-31 20:19:36
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1285
International Journal of Science and Engineering; Vol 2, No 2 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6730
2014-05-01T20:17:44Z
ijse:ART
nmb a2200000Iu 4500
"140415 2014 eng "
2302-5743
2086-5023
dc
A Study of Local Rice Cultivars from Krayan Grown in Tidal Swam Area
Rusdiansyah, Rusdiansyah
Departaement of Agrotectology, Faculty of Agriculture Mulawarman University, Jl. Pasir Belengkong Kampus Gung Kelua Samarinda
Subiono, Tjatjuk
Departaement of Agrotectology, Faculty of Agriculture Mulawarman University, Jl. Pasir Belengkong Kampus Gung Kelua Samarinda
Array
The research was conducted in tidal swamp area of Tuak river, Paser Regency. The objective of the research was to obtain rice cultivar with high adaptability and yield grown in tidal swamp area. The study used four local rice cultivars of Krayan i.e. Nanung, Kelabit, Black Adan and White Adan. As a comparison, Yellow Serai was used. The rice was seeded in 5 x 7 m plot with a planting distance of 30 x 30 cm and 1 seed per planting hole. The treatment was replicated three times in a randomized block design. The result showed that all the four cultivars of Krayan had higher height than Yellow Serai. Nanung was found to be the most tolerant cultivar to salinity and the most adaptable in tidal swamp area. Nanung also produced the highest number of rough rice, the highest yield of weight per 1000 grains, the highest yield of weight of milled rice/ha and the least percentage of empty rough rice/panicle i.e. 182 grains, 29.35 g, 4.20 t/ha, and 15%, respectively.
Chemical Engineering Diponegoro University
2014-04-11 10:29:27
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6730
International Journal of Science and Engineering; Vol 6, No 2 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1279
2012-01-03T11:12:42Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
dc
Table of contents
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Table of contents
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/1279
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/6015
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
dc
EXAMINATION OF THE SUNGKAI’S YOUNG LEAF EXTRACT (Peronema canescens) AS AN ANTIPIRETIC, IMMUNITY, ANTIPLASMODIUM AND TERATOGENITY IN MICE (Mus.muculus)
Putranto, Agus Martono Hadi
Chemistry Dept of Natural Science and Math of Bengkulu University
Array
The research of examination extract sungkai’s young leafs as an antipyretic, immunity, anti plasmodium and teratogenity in mice (Mus. Muculus) has been done. The aims of this research is examinations in infusa effectiveness extract of the young leafs in mice (Mus. Muculus). The object of this research used 50 males Webster’s species mice has 7 – 8 week olds, averages 30 gram in weight. Mice are divided into 5 groups in examination for antipyretic. Mice has been introduced the DPT-HB fever before. The first group as a negative control treated a pure water, second group as a positive control treated a paracetamol 1.08 mg/Kg w/w and rest of groups treated a young sungkai’s extract leafs in the concentration of 0.186 mg/Kg w/w, 0.375 mg/Kg w/w and 0.5625 mg/Kg w/w respectively. Measurements of the temperature toke in the duration of 30, 60, 90 and 120 minutes. Furthermore, in the immunity examination, mice also divided into 5 groups, first as a negative control treated a pure water, second group as a positive control treated 0.07 mg/Kg imunos w/w and respectively for the rest groups treated with young sungkai’s extract leafs in the concentration of 0.186 mg/Kg w/w, 0.375 mg/Kg w/w and 0.5625 mg/Kg w/w. These treatments held in gavage system with the duration at 24 hours. In examination amount of the leukocyte number, toke from the tail of the mice, has a result the dosage in 0.5625 mg/Kg w/w extract’s young leafs of sungkai could be decrease the temperature 29%, it is better than paracetamol treatment which could be decreased only 26% of temperature. In addition, for the immunity examination, the best dosage of the young sungkai’s extract leafs is 0.567 mg/Kg w/w, which It can increase 36% amount of the leukocyte number. This dosage is better than the positive control by using Imunos, which is can increase only 23% of the temperature.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
application/pdf
https://ejournal.undip.ac.id/index.php/ijse/article/view/6015
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
https://ejournal.undip.ac.id/index.php/ijse/article/download/6015/12932
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oai:ojs.ejournal.undip.ac.id:article/4240
2012-12-06T23:25:49Z
ijse:ART
nmb a2200000Iu 4500
"121206 2012 eng "
2302-5743
2086-5023
dc
The Effect of Fe Concentration on the Quality and Quantity of Biogas Produced From Fermentation of Palm Oil Mill Effluent
Matseh, Irvan
Chemical Engineering Department, University of Sumatera Utara
Jl. Almamater Komplek USU Medan 20155
The purpose of this research is to study the effect of Fe concentration as a trace metal on the quality and quantity of biogas produced from the fermentation of palm oil mill effluent (POME). Raw POME as feed was obtained from one of the palm oil mills belong to PTPN IV, other materials used were hydrochloric acid, sodium bicarbonate, and trace metals. Observed variables were volume of biogas, concentration of Fe in raw POME and biodigester, degradation rate of total solid (TS) and volatile solid (VS), M-Alkalinity, pH, H2S and CO2 concentration in biogas at hydraulic retention time (HRT) 6 days. Before HRT of 6 days reached, initial trace metal compositions were 25.2 mg/L of Fe, 0.42 mg/L of Co, and 0.49 mg/L of Ni. After that, composition of trace metal were consisted only Co and Ni. The results showed that Fe as a trace metal did not affect the production or quantity of biogas. When Fe concentration reached over to 330 mg/L then concentration of CH4, total solid (TS) and volatile solid (VS) decreased. Moreover, the higher the Fe contents the smaller of H2S production. Fe content in POME from the same mill had different concentration, as the consequence biogas with different H2S concentrations were produced as well. Thus, Fe in the trace metals is no longer required if high concentration of Fe already existed in POME because it can reduce the formation of H2S. In addition, too high concentration of Fe in POME can be toxic for microorganism in the fermentation of biogas.
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4240
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
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oai:ojs.ejournal.undip.ac.id:article/7230
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
2086-5023
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Community Structure of Macrozoobenthos in Mangrove Ecosystem, Kutai National Park, East Kalimantan
A Budiarsa, Anugrah
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Rizal, Samsul
Fisheries and Marine Science Faculty of Mulawarman University, Kampus Gunung Kelua Samarinda, East Kalimantan
Array
Mangrove forest in Kutai National Park (KNP) is considered as nature-protected ecosystem. This forest ecosystem has high productivity ecosystem roles as feeding source, spawning and conservation area for water organism living in this surrounding area such as fishes, crustacean, mollusk and others. At the mangrove floor, mangrove is a benthic ecosystem that utilizes organic material either produced from mangrove itself or land sedimentation. This research was conducted using quadrant transect method with 10 observation stations. Collected data were identified, summed and analyzed. Community structure was analyzed by determining the diversity index, homogenous index and dominant index. The research showed that Makrozoobenthos found at the research location was 17 species which divided into 12 families and 3 classes. The smallest number was found in Lombok Bay (station number 8) with 6 species. The largest number was found in Perancis Cape (station number 9) with 15 species. The diversity index of community structure ranged from 1,7 to 2,4. This indicated that the community diversity was at moderate level (1,5<N<3) with good homogenous index 0,8-1
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7230
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/4241
2012-12-06T23:27:06Z
ijse:BACK
nmb a2200000Iu 4500
"121206 2012 eng "
2302-5743
2086-5023
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Instruction for Authors
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Instruction for Authors
Chemical Engineering Diponegoro University
2012-10-13 21:45:01
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4241
International Journal of Science and Engineering; Vol 3, No 2 (2012)
eng
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oai:ojs.ejournal.undip.ac.id:article/7662
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
2086-5023
dc
PRELIMINARY STUDY OF SEAWEED DRYING UNDER A SHADE AND IN A NATURAL DRAFT SOLAR DRYER
Phang, Hooi-Kim
Universiti Malaysia Sabah
Chu, Chi-Ming
Universiti Malaysia Sabah
Kumaresan, Sivakumar
Universiti Malaysia Sabah
Rahman, Md. Mizanur
Universiti Malaysia Sabah
Yasir, Suhaimi Md.
Universiti Malaysia Sabah
Array
A solar dryer was designed to study the seaweed drying process under natural convection and compared to a shade drying process. A dewatering pre-treatment process was initially applied to enhance drying process for both methods. The initial weight of seaweed before pre-treatment and after pre-treatment was recorded and the seaweed was then introduced into the solar drying system and shade drying system. The air temperature and relative humidity inside the solar dryer and surrounding were recorded during experiment. A representative sample on each tray was taken for final moisture content determination where the difference of seaweed weight less than 5% for subsequent measurement. The average weight loss of seaweed from pre-treatment was about 54%. The final moisture content of seaweed for solar drying was in the range of 24-61% (d.b.) and for shade drying was in the range of 40-48% (d.b.) with a standard deviation of final moisture content of 20.45% for solar drying and 3.78% for shade drying. The total time for solar drying inclusive of pre-treatment was 6 days and shade drying was 9 days. The drying kinetics of each method was modeled and the results of this study will be utilized to enhance the design and operations of seaweed solar dryers.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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https://ejournal.undip.ac.id/index.php/ijse/article/view/7662
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/4593
2013-04-17T00:30:05Z
ijse:ART
nmb a2200000Iu 4500
"130315 2013 eng "
2302-5743
2086-5023
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Evaluation on Biofilter in Recirculating Integrated Multi-Trophic Aquaculture
Sumoharjo, S.
Aquaculture Department of Fisheries and Marine Science Faculty, Mulawarman University
Kampus Gn. Kelua Jl.Kuaro Tlp.(0541)74111 Samarinda
Maidie, Asfie
Aquaculture Department of Fisheries and Marine Science Faculty, Mulawarman University
Kampus Gn. Kelua Jl.Kuaro Tlp.(0541)74111 Samarinda
Array
Integrated multi-trophic aquaculture pays more attention as a bio-integrated food production system that serves as a model of sustainable aquaculture, minimizes waste discharge, increases diversity and yields multiple products. The objectives of this research were to analyze the efficiency of total ammonia nitrogen biofiltration and its effect on carrying capacity of fish rearing units. Pilot-scale bioreactor was designed with eight run-raceways (two meters of each) that assembled in series. Race 1-3 were used to stock silky worm (Tubifex sp) as detrivorous converter, then race 4-8 were used to plant three species of leaf-vegetable as photoautotrophic converters, i.e; spinach (Ipomoea reptana), green mustard (Brassica juncea) and basil (Ocimum basilicum). The three plants were placed in randomized block design based on water flow direction. Mass balance of nutrient analysis, was applied to figure out the efficiency of bio-filtration and its effect on carrying capacity of rearing units. The result of the experiment showed that 86.5 % of total ammonia nitrogen removal was achieved in 32 days of culturing period. This efficiency able to support the carrying capacity of the fish tank up to 25.95 kg/lpm with maximum density was 62.69 kg/m3 of fish biomass production
Doi: http://dx.doi.org/10.12777/ijse.4.2.2013.80-85
[How to cite this article: Sumoharjo, S. and Maidie, A. (2013). Evaluation on Biofilter in Recirculating Integrated Multi-Trophic Aquaculture. International Journal of Science and Engineering, 4(2),80-85. Doi: http://dx.doi.org/10.12777/ijse.4.2.2013.80-85]
Chemical Engineering Diponegoro University
2013-06-19 22:03:09
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https://ejournal.undip.ac.id/index.php/ijse/article/view/4593
International Journal of Science and Engineering; Vol 4, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/8288
2015-07-28T13:49:35Z
ijse:ART
nmb a2200000Iu 4500
"150415 2015 eng "
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Preparation of Natural Zeolite for Air Dehumidification in Food Drying
Djaeni, Mohamad
(Associate Editor)
(SCOPUS ID = 16027817500; h-index: 5) Department of Chemical Engineering, Diponegoro University http://www.scopus.com/authid/detail.url?origin=resultslist&authorId=16027817500&zone=
Laeli Kurniasari, Laeli
Wahid Hasyim University Semarang
Sasongko, Setia Budi
Diponegoro University
Array
Drying with air dehumidification with solid adsorbent improves the quality of food product as well as energy efficiency. The natural zeolite is one of adsorbent having potential to adsorb the water. Normally, the material was activated to open the pore, remove the organic impurities, and increase Si/Al rate. Hence, it can enhance the adsorbing capacity. This research studied the activation of natural zeolite mined from Klaten, Indonesia as air dehumidification for food drying. Two different methods were used involving activation by heat and NaOH introduction. As indicators, the porosity and water loaded were evaluated. Results showed both methods improved the adsorbing capacity significantly. With NaOH, the adsorbing capacity was higher. The simple test in onion and corn drying showed the presence of activated natural zeolite can speed up water evaporation positively. This performance was also comparable with Zeolite 3A
Chemical Engineering Diponegoro University
2015-03-20 10:37:07
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8288
International Journal of Science and Engineering; Vol 8, No 2 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/5163
2013-08-07T09:59:14Z
ijse:ART
nmb a2200000Iu 4500
"130715 2013 eng "
2302-5743
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Effect of Various Types of Herbs on Sensory Properties and Blood Glucosa Response Adan Instant Black Rice
Saragih, Bernatal
Agriculture Faculty of Mulawarman University
Marwati, M
Suprapto, Hadi
Saragih, Bernaulus
Rachmawati, Maulida
Array
Management based on the carbohydrate diet is very important to do and not to be avoided but how diet and variations of carbohydrate consumed is set mainly the source of rice that does not fast respond to an increase in blood glucose. Therefore, Evaluation of nutritional and instant rice production that is the functional food and have a low glycemic index rice sourced locally as the East Kalimantan native rice black Adan will be very beneficial for health. The aim of this research was to evaluate of the nutritional and effect of various herbal on sensory properties and blood glucose response Adan instant black rice. Adan black rice has a protein content of 8.10%, Fe 3.61 mg/1000g and 3.33 g/100g total dietary fiber and includes a group of rice with low amylose. Organoleptic value of instant rice black Adan produced the most preferred by panellists also from the addition of ginger extract and pandan leaves , water, onion tiwai, tea and last turmeric. The digestibility of starch decreased 19.04 (mg/1000g) after being a functional of instant rice black Adan. Difference in reduction of blood glucose levels in volunteers who consumed black Adan instant rice by 14.20 mg/dL, whereas the provision of a reference food (glucose) of 71.50 mg/dL, this indicates of instant rice functional black Adan provide availability of glucose in the blood longer available.
Chemical Engineering Diponegoro University
2013-06-02 06:38:22
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5163
International Journal of Science and Engineering; Vol 5, No 1 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/8705
2015-11-20T09:43:11Z
ijse:ART
nmb a2200000Iu 4500
"150715 2015 eng "
2302-5743
2086-5023
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Dual solutions for MHD stagnation-point flow of a nanofluid over a stretching surface with induced magneticfield
Naramgari, Sandeep
Gulbarga University
C, Sulochana
Gulbarga University
Array
Present study deals with the buoyancy-driven MHD mixed convection stagnation-point flow, heat and mass transfer of a nanofluid over a non-isothermal stretching sheet in presence of induced magneticfield, radiation, chemical reaction, suction/injection and heat source/sink. The basic governing partial differential equations are reduced to a set of ordinary differential equations by using appropriate similarity transformation. The resulting system is solved numerically by bvp5c Matlab package. Numerical results are validated by comparing with the published results. The influence of non-dimensional governing parameters on velocity, induced magneticfield, temperature and concentration profiles along with coefficient of skin friction, local Nusselt and Sherwood numbers are discussed and presented with the help of graphs and tables. Comparisons are made with the existed studies. Results indicate that dual solutions exists only for certain range of suction/ injection parameter and injection parameter have tendency to enhance the momentum, thermal and concentration boundary layer thickness.
Chemical Engineering Diponegoro University
2015-11-07 22:26:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/8705
International Journal of Science and Engineering; Vol 9, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/5565
2013-11-03T22:28:15Z
ijse:ART
nmb a2200000Iu 4500
"131015 2013 eng "
2302-5743
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UTILIZATION OF AGARWOOD DISTILLATION WASTE IN OILWELL CEMENT AND ITS EFFECT ON FREE WATER AND POROSITY
Sauki, Arina
Universiti Teknologi MARA
Md. Shahid, Muhammad Hazman
Universiti Teknologi MARA
Ku Hamid, Ku Halim
Universiti Teknologi MARA
Azizi, Azlinda
Universiti Teknologi MARA
Jamaludin, Siti Khatijah
Universiti Teknologi MARA
Tengku Mohd, Tengku Amran
Universiti Teknologi MARA
Alias, Nur Hashimah
Universiti Teknologi MARA
Array
The intent of this research is to utilize the waste produced by distillation process of Agarwood oil and convert it into a profitable oilwell cement additive. Common problem during oilwell cementing is free wáter separation. This problem could weaken cement at the top, gas migration problem and non uniform density of cement slurry that are even worst in cementing deviated well. Another concern on cementing design is the porosity of the hardened cement. If the cement is too porous, it can lead to gas migration and casing corrosion. All tests were conducted according to API Specification-10B. Free water test was determined at different concentrations of Agarwood Waste Additive (AWA), different inclination angles and different temperatures. Based on the findings, it was observed that zero free water was produced when 2% BWOC of AWA was used at all angles. The findings also revealed that AWA can maintain good thermal stability as it could maintain zero free water at increased temperature up to 60˚C. The porosity of AWA cement was comparable with standard API neat cement as the porosity did not differ much at 2% BWOC of AWA. Therefore, it can be concluded that the AWA is suitable to be used as an additive in oil well cement (OWC) with 2% BWOC is taken as the optimum concentration.
Chemical Engineering Diponegoro University
2013-10-10 16:13:18
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5565
International Journal of Science and Engineering; Vol 5, No 2 (2013)
eng
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oai:ojs.ejournal.undip.ac.id:article/11345
2016-09-25T20:31:00Z
ijse:ART
nmb a2200000Iu 4500
"160115 2016 eng "
2302-5743
2086-5023
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Ergonomics in Work Method to Improve Construction Labor Productivity
Sumarningsih, Tuti
1Department of Civil Engineering and Planning, Islamic Indonesian University
Wibowo, Mochammad Agung
Department of Civil Engineering, Diponegoro University
Wardani, Sri Prabandiyani Retno
2Department of Civil Engineering, Diponegoro University
Array
Productivity is an important issue in the construction industry. It is directly related to the construction cost and duration of the work. Construction productivity is influenced by many factors, such as material, equipment and labor. Labor is the most important factor, since labor determines how the work is done. Labor productivity is influenced by the work methods, physical fatigue, work environment, capability, and complexity of the work. To improve labor productivity due to the work method, application of the principle of ergonomics is important to consider. This research was held in Yogyakarta included 10 construction projects and involve 30 labor of brick masonry work, 22 labor of ceramic instalation, and 24 labor of wall painting work. The application of ergonomics principles in the masonry work, plaster work, ceramic installation, and wall painting work show an increase in labor productivity by 28.49%, 16.22%, 21.47%, and 26.18% respectively. Compared with the National Standards of Indonesia (NSI) these productivity per job are higher by 10.34%, 57.89%, 12.72%, and 33.33%.
Chemical Engineering Diponegoro University
2016-02-05 21:51:57
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https://ejournal.undip.ac.id/index.php/ijse/article/view/11345
International Journal of Science and Engineering; Vol 10, No 1 (2016)
eng
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oai:ojs.ejournal.undip.ac.id:article/5824
2014-12-27T21:27:04Z
ijse:ART
nmb a2200000Iu 4500
"140115 2014 eng "
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The Potential of Tiger Prawn Fry from Delta Mahakam, East Kalimantan Indonesia
Suroso, Bob
Faculty of Fisheries and Marine Sciences Mulawarman University, Sam
Hutabarat, Johannes
Faculty of Fisheries and Marine Science, Diponegoro University Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang
Afiati, Norma
Faculty of Fisheries and Marine Science, Diponegoro University Jl. Prof. Soedarto, SH. Kampus UNDIP Tembalang Semarang
Array
Most of the life cycle of tiger prawns were estuarine (Delta Mahakam). In the juvenile stage life in estuarine and the adult stage in marine. The research objective is to assess the potential of the tiger prawn fry catches in the Mahakam Delta, as a source of tiger prawn fry in the Mahakam Delta area farms. Research using interviews and descriptive analysis through monitoring with fishermen. The results showed that the fry tiger prawn from the Delta Mahakam there on the beaches or the edge of the sea where the water is shallow and slightly brackish, as in the Delta Mahakam. Fry can be captured by using rumpon. Tiger prawns fry from Delta Mahakam durability is relatively higher than fry from the hatchery. However, the number and continuity of fry very limited because it depends on the season. Abundance of fry is determined by the number of larvae produced in the wild and their survival is greatly influenced by the availability of food.
Doi: 10.12777/ijse.6.1.43-46
[How to cite this article: Suroso, B., Hutabarat, J., and Afiati, N. (2013). The Potential of Tiger Prawn Fry from Delta Mahakam, East Kalimantan Indonesia, International Journal of Science and Engineering, 6(1),43-46. Doi: 10.12777/ijse.6.1.43-46
Chemical Engineering Diponegoro University
2013-10-25 19:25:37
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https://ejournal.undip.ac.id/index.php/ijse/article/view/5824
International Journal of Science and Engineering; Vol 6, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/1243
2012-09-27T14:42:00Z
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nmb a2200000Iu 4500
2302-5743
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Study on Treatment of Slaughterhouse Wastewater by Electro-coagulation Technique
Budiyono, B.
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH No. 1 Tembalang Semarang
Widiasa, I Nyoman
Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH No. 1 Tembalang Semarang
Johari, Seno
Doctor in Animal Agriculture Program, Post Graduate Program, Diponegoro University, Jl. Imam Bardjo, SH No. 5 Semarang
Electro-coagulation (EC) is well known as a technique for removing suspended solids as well as oils and greases from wastewater. The aims of this research are to study the performance of the EC technique to treat a high strength wastewater from slaughterhouse in batchwise mode. The effect of various process variables such as number and electrode material, initial pH, suspended solid (SS) content, and operating time was investigated The electrolytic cell (electro-coagulator) used was a 600 ml cylinder glass reactor with working volume 400 ml and equipped by magnetic stirrer without temperature control. Cast iron (Fe) and aluminum (Al) cylinder were used as anode/cathode pair. The number of electrode was varied 1 and 2 pairs. The effective area of the electrode pair was 6.28 cm2. The DC power supply was controlled by a voltmeter and be adjusted constant at 125 A/m2 for each test runs. The initial SS concentration were varied from 1250, 2100, 3000, and 4000 mg/L by diluting wastewater. It is found that effluent temperature depends on SS and increases up to 98 °C when SS content was 4000 mg/L. One and two pairs of Fe-Al electrode will give SS removal efficiency are 97.2 and 99.6 %, respectively. However, the higher electrode number will need the shorter time to get certain removal efficiency of SS. Number of electrodes didn’t give the significant impact to the final pHs. With initial pH 7.05 both two pair of electrode will give the final pH relatively constant to 7.80. Further work will be conducted to optimize the CD and charge loading to avoid the excessive temperature increase
Chemical Engineering Diponegoro University
2010-07-01 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1243
International Journal of Science and Engineering; Vol 1, No 1 (2010)
eng
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oai:ojs.ejournal.undip.ac.id:article/6246
2015-06-12T13:27:27Z
ijse:ART
nmb a2200000Iu 4500
"150115 2015 eng "
2302-5743
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Snap-Through Buckling Problem of Spherical Shell Structure
Sumirin, Sumirin
Department of Civil Engineering, Sultan Agung Islamic University, Semarang, Indonesia
Nuroji, Nuroji
Department of Civil Engineering, Diponegoro University, Jl.Prof.Soedarto,SH.Kampus UNDIP Tembalang, Semarang
Besari, Sahari
Department of Civil Engineering, Institute of Technology, Jl. Ganesha 10, Bandung
Array
This paper presents results of a numerical study on the nonlinear behavior of shells undergoing snap-through instability. This research investigates the problem of snap-through buckling of spherical shells applying nonlinear finite element analysis utilizing ANSYS Program. The shell structure was modeled by axisymmetric thin shell of finite elements. Shells undergoing snap-through buckling meet with significant geometric change of their physical configuration, i.e. enduring large deflections during their deformation process. Therefore snap-through buckling of shells basically is a nonlinear problem. Nonlinear numerical operations need to be applied in their analysis. The problem was solved by a scheme of incremental iterative procedures applying Newton-Raphson method in combination with the known line search as well as the arc- length methods. The effects of thickness and depth variation of the shell is taken care of by considering their geometrical parameter l. The results of this study reveal that spherical shell structures subjected to pressure loading experience snap-through instability for values of l≥2.15. A form of ‘turn-back’ of the load-displacement curve took place at load levels prior to the achievement of the critical point. This phenomenon was observed for values of l=5.0 to l=7.0.
Chemical Engineering Diponegoro University
2014-12-26 20:34:58
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6246
International Journal of Science and Engineering; Vol 8, No 1 (2015)
eng
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oai:ojs.ejournal.undip.ac.id:article/1286
2012-01-03T11:12:42Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
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Aims and Scope
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Aims and Scope
Chemical Engineering Diponegoro University
2011-07-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/1286
International Journal of Science and Engineering; Vol 2, No 1 (2011)
eng
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oai:ojs.ejournal.undip.ac.id:article/6733
2014-10-23T15:51:29Z
ijse:ART
nmb a2200000Iu 4500
"140715 2014 eng "
2302-5743
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Standardization of the Electricity and Economic Potentials of Landfill gas (LFG) in Lagos, Nigeria.
AKUJIEZE, Christopher N
University of Benin
IDEHAI, Imoukhuede Moses
University of Benin
Array
Globally, various practical data and scholarly estimations of the electricity potentials of landfill gas (LFG) have been forwarded and these can be juxtaposed for estimations in the megacity called Lagos. The calculated values were between 63.22- 700MW of derivable electricity. However, in order to limit observable disparities and ambiguities in these derivations and thus allow for more accurate projections, these estimations can be gauged using as template; -stoichiometry, establishing 50% of landfill gas as methane, assuming 50% of this volume as recoverable, and using a proposed engine efficiency of 30%.
This standardization projects a theoretical mean achievable electrical power of 121.69 MW for the Lagos area from a population of about 21 million with a generation per capita (GPC) of 0.63kg with biodegradable content of about 60%. The yearly electrical energy was placed at 1,066,004.4 MWh with tariff revenue in excess of US$ 106.6 million /yr. An accruing carbon credit of about US$75.59 million /yr is expected from certified emission reduction (CER). The projected derivations can be used as models for evaluation of the landfill gas and electricity potentials in many parts of the world.
Chemical Engineering Diponegoro University
2014-05-11 17:20:19
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https://ejournal.undip.ac.id/index.php/ijse/article/view/6733
International Journal of Science and Engineering; Vol 7, No 1 (2014)
eng
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oai:ojs.ejournal.undip.ac.id:article/3402
2012-04-29T18:09:27Z
ijse:EDT
nmb a2200000Iu 4500
2302-5743
2086-5023
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Editorial (aims and scope, table of content, editorial board, preface)
support, editor
Department of Chemical Engineering, Diponegoro University Semarang, Central Java
This section contains aims and scope, table of content, editorial board, and preface
Chemical Engineering Diponegoro University
2012-04-15 00:00:00
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https://ejournal.undip.ac.id/index.php/ijse/article/view/3402
International Journal of Science and Engineering; Vol 3, No 1 (2012)
eng
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