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International Journal of Science and Engineering (IJSE)

ijse
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Published by Universitas Diponegoro

ISSN : - EISSN : - DOI : -

Core Subject : Engineering,

Engineering

The scope of journal covers all area in the application on chemical, physical, mathematical, biological, agricultural, corrossion, and computer science to solve the engineering problems.

Arjuna Subject : -

Articles 225 Documents

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Evaluation of conductive polymers as an adsorbent for eradication of As (III) from aqueous solution using inductively coupled plasma optical emission spectroscopy (ICP-OES) Muhammad Imran Din; Sadia Ata; Ijaz Ul Mohsin; Ata Rasool; Andleeb Andleeb Aziz
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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.

Strategy of Quality Improvement of Pond Shrimp Post Harvest Management (Penaeus monodon Fabricius) in Mahakam Delta (Case Study) Andi Noor Asikin; S. Hutabarat; Y. S. Darmanto; S. B. Prayitno
International Journal of Science and Engineering Vol 3, No 2 (2012)
Publisher : Chemical Engineering Diponegoro University

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

Comparative Analysis of Data Mining Classification Algorithms in Type-2 Diabetes Prediction Data Using WEKA Approach Kawsar Ahmed; Tasnuba Jesmin
International Journal of Science and Engineering Vol 7, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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.

Physiological Process of Acacia mangium Willd. Plant of Six Months Old Attacked by Black Spots Disease in PT Itci Hutani Manunggal Terunen Helda Syahfari; Ach. Arieffin Bratawinata; Maman Sutisna; Djumali Mardji
International Journal of Science and Engineering Vol 5, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

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 ]

INDONESIAN EFFORTS TO CONSERVE GEMBRONG GOATS Hasanatun Hasinah; Ismeth Inounu; Subandriyo Subandriyo
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

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.

Turbidity Measurement Using An Optical Tomography System Sallehuddin Bin Ibrahim
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

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.

Properties of Carbon Black from Jatropha Seed Shell as A Potential Source of Filler Enhancement in Biocomposites N. A. Sri Aprilia; H.P.S. Abdul Khalil; Amri Amin
International Journal of Science and Engineering Vol 10, No 2 (2016)
Publisher : Chemical Engineering Diponegoro University

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

Potential Production of Polyunsaturated Fatty Acids from Microalgae Noer Abyor Handayani; Dessy Ariyanti; Hady Hadiyanto
International Journal of Science and Engineering Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

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

Feasibility study of Using Liquid Gel in Stabilizing Doogh by Hydrocolloids of Psyllium Husk and Guar Gum Tayebeh Tavakoli Vardanjani; Mohammad Hojjatoleslamy; Mohammad Ali Shariati
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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.

The Effect of Clenbuterol on Growth Performance of Growing Male Pig Wayan Sukarya Dilaga
International Journal of Science and Engineering Vol 3, No 1 (2012)
Publisher : Chemical Engineering Diponegoro University

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

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