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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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The Sex Pheromone Content of The Spodoptera Exigua (Hubner) Under Artificial and Natural Diets Kadis Mujiono; Witjaksono Witjaksono; Nugroho Susetya Putra
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

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

Editorial (Table of Content, Editorial Board, Preface) IJSE Editor
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

Editorial (Table of Content, Editorial Board, Preface)

An Extensive Study of Thermo-electric Effect Mukul Chandra Das
International Journal of Science and Engineering Vol 13, No 1 (2019)
Publisher : Chemical Engineering Diponegoro University

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.

An Overview of Biocement Production from Microalgae Dessy Ariyanti; Noer Abyor Handayani; Hadi Hadiyanto
International Journal of Science and Engineering Vol 2, No 2 (2011)
Publisher : Chemical Engineering Diponegoro University

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

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

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

The Effect of Chrysonilia crassa Additive on Duodenal & Caecal Morphology, Bacterial & Fungal Number, and Productivity of Ayam Kampung Turrini Yudiarti; V. D. Yunianto B.I; R. Murwani; E. Kusdiyantini
International Journal of Science and Engineering Vol 3, No 2 (2012)
Publisher : Chemical Engineering Diponegoro University

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.

The Application Modular Floating Pontoon to Support Floods Disaster Evacuation System in Heavy Populated Residential Area Ahmad Fauzan Zakki; Aulia Windyandari
International Journal of Science and Engineering Vol 7, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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.

Nitrogen Retention and Productive Performance of Crossbred Native Chicken Due to Feeding Effect of Kayambang (Salvinia molesta) Binti Ma'rifah; Umiyati Atmomarsono; Nyoman Suthama
International Journal of Science and Engineering Vol 5, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

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 ]

STUDY ADSORPTION DESORPTION OF MANGANESE(II) USING IMPREGNATED CHITIN-CELLULOSE AS ADSORBENT Aldes Lesbani; Ema Veronika Turnip; Risfidian Mohadi; Nurlisa Hidayati
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

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

Characteristics of Red Algae Bioplastics/Latex Blends under Tension M. Nizar Machmud; Reza Fahmi; Rohana Abdullah; Coco Kokarkin
International Journal of Science and Engineering Vol 5, No 2 (2013)
Publisher : Chemical Engineering Diponegoro University

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 paperDoi: 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

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