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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.

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Articles 225 Documents

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Result of Six Local Upland Rice Cultivars of East Kalimantan at Different Plant Spacing R. Rusdiansyah; Yazid Ismi Intara; Budi Indra Setiawan
International Journal of Science and Engineering Vol 4, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

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

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
International Journal of Science and Engineering Vol 8, No 1 (2015)
Publisher : Chemical Engineering Diponegoro University

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.

Editorial (Table of Content, Editorial Board, Preface) Support Editor
International Journal of Science and Engineering Vol 5, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

Editorial (Table of Content, Editorial Board, Preface)

The Efficacy of Dutasteride and Green Tea Combination Towards Angiogenesis and Bleeding on BPH after TURP : Study their effect on VEGF, MVD and Hb Eriawan Agung Nugroho; Rifki Muslim; Ignatius Riwanto; Soetojo Wirjo Pranoto
International Journal of Science and Engineering Vol 9, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

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

REDUCING THE PRODUCTION TIME OF INDONESIAN SWEETENED SOY SAUCE WITH FERMENTATION MODIFICATION Timothy Henri Suryodinoto
International Journal of Science and Engineering ARTICLE IN PRESS
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12777/ijse.0.0.

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.

Pitting Corrosion of Ni3(Si,Ti)+4Al Intermetallic Compound at Various Chloride Concentrations Gadang Priyotomo; Pius Sebleku; Yasuyuki Kaneno
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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).

Isolation and Fermentation of Lactobacillus plantarum JR64 as an Omega 6 Probiotic Producer Lanjar Sumarno; Djumali Mangunwidjaja; Anas M. Fauzi; Khaswar Syamsu; Nastiti Siswi Indrasti; Bambang Prasetya
International Journal of Science and Engineering Vol 2, No 2 (2011)
Publisher : Chemical Engineering Diponegoro University

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]

A HIGH ORDER SOLUTION OF THREE DIMENSIONAL TIME DEPENDENT NONLINEAR CONVECTIVE-DIFFUSIVE PROBLEM USING MODIFIED VARIATIONAL ITERATION METHOD Pratibha Joshi; Maheshwar Pathak
International Journal of Science and Engineering Vol 8, No 1 (2015)
Publisher : Chemical Engineering Diponegoro University

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.

AGV Trajectory Control Based on Laser Sensor Navigation Thanh Luan Bui; Phuc Thinh Doan; Soon Sil Park; Hak Kyeong Kim; Sang Bong Kim
International Journal of Science and Engineering Vol 4, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

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]

UTILIZATION OF GENCIL MOBILE APPLICATION IN IMPLEMENTING SMART CITY IN PONTIANAK Hidana Nur Jannah
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

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

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