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International Journal of Science and Engineering (IJSE)
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : 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 17 Documents
Search results for , issue "Vol 6, No 2 (2014)" : 17 Documents clear
New Concept of Cultivation Using Limited Strip-Tillage with Strip Shallow Irrigation Intara, Yazid Ismi; Sapei, A; Erizal, Erizal; E. S, Namaken; Joefrie, M. Bintoro
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.106 KB) | DOI: 10.14710/presipitasi.v%vi%i.387-400

Abstract

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
Editorial (Table of Content, Editorial Board, Preface, Aim and Scope) Support, Editor
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.35 KB) | DOI: 10.12777/ijse.6.2.i-v

Abstract

Editorial (Table of Content, Editorial Board, Preface, Aim and Scope
A Study of Local Rice Cultivars from Krayan Grown in Tidal Swam Area Rusdiansyah, Rusdiansyah; Subiono, Tjatjuk
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.581 KB) | DOI: 10.12777/ijse.6.2.131-134

Abstract

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.
The Distribution of Capture Fisheries Based Small Pelagic - Mackerel Fish Species In Balikpapan Waters, East Kalimantan Abdusysyahid, Said; Anggoro, Sutrisno; Bambang, Azis Nur
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1282.997 KB) | DOI: 10.14710/presipitasi.v%vi%i.338-352

Abstract

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.
Clonal Propagation of Two Clones Eucalyptus Pellita F. Muell By Mini-Cutting Dwi Sulichantini, Ellok; Sutisna, Maman; Sukartiningsih, Sukartiningsih; Rusdiansyah, Rusdiansyah
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.06 KB) | DOI: 10.12777/ijse.6.2.117-121

Abstract

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
Hybrid membrane using polyethersulfone-modification of multiwalled carbon nanotubes with silane agent to enhance high performance oxygen separation Kusworo, Tutuk Djoko; Ismail, Ahmad Fauzi; Mustafa, Azeman
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1209.63 KB) | DOI: 10.12777/ijse.6.2.163-168

Abstract

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.
Studies on as separation behaviour of polymer blending PI/PES hybrid mixed membrane: Effect of polymer concentration and zeolite loading Ismail, Ahmad Fauzi; Kusworo, Tutuk Djoko
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3384.879 KB) | DOI: 10.12777/ijse.6.2.144-148

Abstract

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.
DRYING TIME ESTIMATION OF CARRAGEENAN-EGG WHITE MIXTURE AT TRAY DRYER Djaeni, Mohamad; Prasetyaningrum, Aji; Asiah, Nurul; Hartono, Ratnawati
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (801.327 KB) | DOI: 10.12777/ijse.6.2.122-125

Abstract

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.
The Nutrient Potency of Palm Oil Plantation and Mill’s By-product Processed with Amofer Technology as Ruminant Feed Mayulu, Hamdi
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (389.374 KB) | DOI: 10.12777/ijse.6.2.112-116

Abstract

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
Distribution of Mean Annual Percipitable Water in Nigeria Udo, Iniobong Anthony; Okujagu, Charity U.
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.632 KB) | DOI: 10.12777/ijse.6.2.174-176

Abstract

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

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