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Aceh International Journal of Science and Technology

AIJST
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Published by Universitas Syiah Kuala

ISSN : 20889860 EISSN : 25032348 DOI : http://10.13170/aijst

Core Subject : Science, Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences

Aceh International Journal of Science & Technology (AIJST) is published by the Graduate School of Syiah Kuala University (PPs Unsyiah) and the Indonesian Soil Science Association (Himpunan Ilmu Tanah Indonesia, Komda Aceh). It is devoted to identifying, mapping, understanding, and interpreting new trends and patterns in science & technology development, especially within Asian countries as well as other parts of the world. The journal endeavors to highlight science & technology development from different perspectives. The aim is to promote broader dissemination of the results of scholarly endeavors into a broader subject of knowledge and practices and to establish effective communication among academic and research institutions, policymakers, government agencies, and persons concerned with the complex issue of science & technology development. The Journal is a peer-reviewed journal. The acceptance decision is made based upon an independent review process supported by rigorous processes and provides constructive and prompt evaluations of submitted manuscripts, ensuring that only intellectual and scholarly work of the greatest contribution and highest significance is published. The AIJST publishes original conceptual and research papers, review papers, technical reports, case studies, management reports, book reviews, research notes, and commentaries. It will occasionally come out with special issues devoted to important topics concerning science & technology development issues. Scopes Starting in 2016, AIJST has focused on science and engineering aspects, and therefore now AIJST considers the topics but not limited to : Engineering (Mechanical, Chemical, Civil, Transportation) Geology and Geomorphology Environmental Science (Hydrology, Pollution, Water Treatment, Soil Science, Climatology) Physical Oceanography Mathematics Physics and Geophysics Geospatial and Information Technology

Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Global dan Perubahan Planet

Articles 354 Documents

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Study on Salting out-Steam Distillation Extraction Technology and Antibacterial Activities of Essential Oil from Cumin Seeds Hong Zhang; Qing-Ping Hu
Aceh International Journal of Science and Technology Vol 3, No 3 (2014): December 2014
Publisher : Graduate Program of Syiah Kuala University

The effects of different factors on the yield of essential oil from were discussed, and the extraction conditions of essential oil from cumin seeds by salting out-steam distillation technology based on single-factor test and orthogonal experiment, as well as its antibacterial activities on several common food spoilage bacteria were studied in this paper. The results showed that, the impact order of the influence factors was liquid/solid ratio distilling time NaCl concentration, and optimized extraction conditions were as follows, liquid to material ratio 15:1, soaking time 1 h, 4% NaCl, steam distilling time 3 h. The yield of essential oil was up to 4.48% under these conditions. The results of antibacterial activity assays showed that the essential oil from cumin seeds exhibited the different antibacterial activities against some food borne pathogens, especially it presented the best inhibitory effect against Bacillus subtilis with the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 6.25 and 12.5 mg/mL respectively, followed by Staphylococcus albus and Staphylococcus aureus, the lowest for Pseudomonas aeruginosa and Shigella dysenteriae

Behaviour Analysis of Strengthened-RC Beam with Natural Fiber Reinforced Polymer (NFRP) based on Abaca Fiber by Using Finite Element Method Taufiq Saidi; Muttaqin Hasan; Zahra Amalia; Muhammad Iqbal
Aceh International Journal of Science and Technology Vol 11, No 2 (2022): August 2022
Publisher : Graduate Program of Syiah Kuala University

The use of synthetic Fiber Reinforced Polymer (FRP) as a composite material is an alternative material that has been widely used for strengthening and repairing reinforced concrete structures. However, the high price is one of the obstacles in applying synthetic FRP materials in developing countries such as Indonesia. Utilization of natural fiber as a Natural Fiber Reinforced Polymer (NFRP) composite material is an alternative, especially in shear strengthening of reinforced concrete beams. Because it has good tensile strength and also is environmentally friendly. Technological developments in the field of computing make modelling various aspects easier. One of them is modelling reinforced concrete (RC) beams. ATENA V534 is a software that can be used for finite element-based modelling. Therefore, in this study, the ATENA V534 software was used to evaluate the results of research and testing behaviour of reinforced concrete beams from the previous studies about strengthened beam for shear by using NFRP. Behaviour that is evaluated in the form of load and deflection, the pattern of cracks and failure, and stress and strain of reinforcements. The numerical results obtained in ATENA V534 showed in a good agreement with experimental results.

Improvement of Soil Physical Properties of Cambisol Using Soil Amendment Darusman Darusman; Devianti Devianti; Edi Husen
Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate Program of Syiah Kuala University

Managing dryland requires intergrated knowledges on soil, water and plants relationship in order to achieve maximum yield. Using local and unused resource is important not only in aspect of reducing pollution but low price and also affordable for farmers. Thus, using amendment from in situ resources is suggested by many experts. This amendment used is assumed it could contribute improvement physical properties of soil and result better yields. This study aimed to studi more deeply on how much of soil amendment might improve physical properties of Cambisol under dryland environment and furthermore find out the crop response to soil amendments. The research was conducted during July to Oct. 2016 at Gampong Paud, Muara Tiga District, Pidie District, Aceh Province with the altitude ± 30 m asl and slope 0-3 %. A Randomized Completely Block Design (RCBD) with two factors replicated three times was used. First factor was soil amendment consisting of 4 levels ; no amendment (control), cow manure amount 10 ton ha -1, straw compost 10 ton ha-1, and cow manure 10 ton ha -1 + compost 10 ton ha-1. The second factor was 5 varieties of peanut: Tuban, Hypoma 2, Bima, Kelinci and Gajah. The parameters observed were soil bulk density, permeability, total soil porosity, aggregate stability index, soil water holding capacity at water potential -3 and -15 bar. Results of our studies showed soil amandement improves some soil physical properties, combination amendment with variety of peanuts resulted significant effects to soil physical properties, and combination treatments mostly influenced soil physical properties at soil depth of 0 -20 cm. Addition of 10 tons ha -1 cow manure or 10 ton ha -1 straw compost is enough to improve soil physical properties

Effects of Dietary Katuk Leaf Extract on Growth Performance, Feeding Behavior and Water Quality of Grouper Epinephelus coioides Agus Putra A. S; Urip Santoso; Meng Chou Lee; Fan Hua Nan
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract - Plant-derived materials are believed as potential nutrient sources to be applied in aquaculture. Although many studies to assess the benefits of plant extracts have been conducted, however effects of dietary katuk (Sauropus androgynus L. Merr.) on growth performances, feeding behavior and water quality of grouper (Epinephelus coioides) are not well known. In this study, 25 grouper juveniles weighing 11.27 ± 2.53 g were reared into 100-L tank (60 x 50 x 35 cm) and cultivated for 70 days. The fish were divided into four groups in triplicate, and were offered diet without katuk extract (control), diet supplemented with 1% katuk extract (SAA); diet supplemented with 2.5% katuk extract (SAB) and diet supplemented with 5.0% katuk extract (SAC) twice daily. Statistical analyses showed that dietary katuk extract caused a significant (P 0.05) increase in growth rate and feed intake. The efficiency of feed was also significant when fish offered diets supplemented with 1% of katuk extract which indicated by a lower feed conversion ratio. However, no statistical differences were observed on the survival rate, condition factor, viscerosomatic index and hepatosomatic index. Observation on feeding behavior found that all treated fish consumed compounded diet just after provided into their tank and there were no abnormal behavior or any healthy problems during experimental periods. It demonstrated that application of katuk extract in fish diets is acceptable and can stimulate the fish appetites. In conclusion, our studies indicated that dietary katuk (Sauropus androgynus) extract can be applied in aquaculture to stimulate the growth and improve feed utilization.Keywords: Feed conversion ratio, feed utilization, plant extract, Sauropus androgynus.

The Implementation of Machine Learning in Lithofacies Classification using Multi Well Logs Data Sudarmaji Saroji; Ekrar Winata; Putra Pratama Wahyu Hidayat; Suryo Prakoso; Firman Herdiansyah
Aceh International Journal of Science and Technology Vol 10, No 1 (2021): April 2021
Publisher : Graduate Program of Syiah Kuala University

Lithofacies classification is a process to identify rock lithology by indirect measurements. Usually, the classification is processed manually by an experienced geoscientist. This research presents an automated lithofacies classification using a machine learning method to increase computational power in shortening the lithofacies classification process's time consumption. The support vector machine (SVM) algorithm has been applied successfully to the Damar field, Indonesia. The machine learning input is various well-log data sets, e.g., gamma-ray, density, resistivity, neutron porosity, and effective porosity. Machine learning can classify seven lithofacies and depositional environments, including channel, bar sand, beach sand, carbonate, volcanic, and shale. The classification accuracy in the verification phase with trained lithofacies class data reached more than 90%, while the accuracy in the validation phase with beyond trained data reached 65%. The classified lithofacies then can be used as the input for describing lateral and vertical rock distribution patterns.

Adsorption of Textile Dye by Activated Carbon Made from Rice Straw and Oil Palm Midrib Mochamad Lutfi Firdaus; Noli Krisnanto; Wiwit Alwi; Ronald Muhammad; Muhamad Allan Serunting
Aceh International Journal of Science and Technology Vol 6, No 1 (2017): April 2017
Publisher : Graduate Program of Syiah Kuala University

Synthetic dye wastewater from textile industries is characterized by strong color, high temperature, variable pH and high chemical oxygen demand (COD). The strong color of wastewater affects aesthetic and water transparency of water bodies. The metabolites could be toxic to aquatic biota and posing a potential hazard to human health. Eventually, it will cause severe environmental problems. One of method that has advantages in term of simplicity to remove synthetic dyes is adsorption. Environmentally benign and low-cost materials to make adsorbent are biomass-based materials. Two different biomaterial wastes of rice straw and oil palm midrib were used in this study to develop activated carbon adsorbents. These adsorbents were applied for the removal of Naphtol AS-G dye in aqueous solution. The effects of solution pH, adsorbents masses and contact time on dye adsorption were evaluated based on batch experiments. Removal of dye can be achieved within 60 minutes at a wide pH range starting from 4 to 8. At lower pH, synthetic dye removal was decreasing probably due to protonation of adsorbent’s active sites. The adsorption isotherms based on Langmuir and Freundlich models were analyzed. The isotherms analysis indicated that the adsorption by rice straw and oil palm can be represented by Langmuir and Freundlich isotherm model, respectively. Adsorption isotherms of Naphtol AS-G onto activated carbon are favorable with high adsorption capacity for both biomaterials. The mechanisms of color removal by activated carbon involved chemical and physical adsorption, in accordance with both the Langmuir and Freundlich models. The calculated maximum dye adsorption capacities onto rice straw and oil palm midrib activated carbon were 55.86 and 69.44 mg/g, respectively. Adsorption using biomass-based activated carbon offers a good technique for textile wastewater treatment as it could remove up to 95% of the color intensity besides reducing other pollutants such as COD, nitrate and phosphate.

A Simple Method to Develop a Formula for Estimating Concentration Time of Drainage Design Alfiansyah Yulianur; Sugianto Sugianto; Frystia Mala Puspita
Aceh International Journal of Science and Technology Vol 8, No 3 (2019): December 2019
Publisher : Graduate Program of Syiah Kuala University

Concentration time of rainfall is an important aspect to determine drainage design. A general rational formula is used to determine design flood or peak flow in urban drainage planning, especially for storm sewer design. The use of this balanced formula requires rainfall intensity, whose duration of rain is equal or more than the time of concentration. This time of concentration is determined using an estimation formula whose formation requires measurement data of the time of concentration. This study introduces how to measure the time of concentration using the concept of-rational-hydrograph, in which peak flow occurs at the time of concentration. To fulfill the aim of this research, an experimental of catchment area planted with Zoysia Japonica grass and showered with a rainfall simulator was conducted. The length of the flow path on the land, L, given in 5 variations, namely 50 cm, 100 cm, 150 cm, 200 cm, and 250 cm, was used. The slope of the land, S, is given in 3 variations, namely 2.8 %, 5,6%, and 8.8%. For each variation of L and S, the experimental catchment area was poured with a fixed rainfall intensity, which is 60 mm/hour. The flow was measured every 5 minutes intervals. Then, from the relationship of flow and time, a rational hydrograph was formed, from which the time of concentration, Tc, was deduced. This Tc value was treated as the measured Tc to form the Tc estimation formula using the regression formula. The formula is Tc = 3.543 + 1.211 L – 17.119 S, with the coefficient of determination R2 = 0.98. These results show that the determination of Tc using the concept of the rational- hydrograph is acceptable. This formula applies to L and S values greater than zero and applies to land covered by Zoysia Japonica grass. Further research is needed for other types of land cover to validate the formula obtained in this research.

DFT and PM3 Computational Studies of the Reaction Mechanism of the Oxidation of L-Tyrosine by Iodine in the Gas Phase Gideon A. Shallangwa; Adamu Uzairu; Victor O. Ajibola; Hamza Abba
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - The oxidation of L-Tyrosine by molecular iodine was studied using semi-empirical and density functional theory methods. Molecular information such as net charges, values of frontier orbital energies, composition, proportions and bonding contribution were obtained and analyzed. Thus, possible reactive sites were proposed and the reaction mechanism was postulated. The postulated transition states, intermediates and products were also computed using the PM3 and DFT methods. Computed enthalpies of the oxidation reaction at standard conditions for the PM3 and DFT calculation were 216.97 kJ/mol and -36327404.72 kJ/mol respectively. The calculated ΔGo andΔSo, for the transition states according to the DFT model were both large and negative indicating that the processes were exergonic associative substitution reactions.

Pyrolysis of Puspa Wood Sawdust and Sugarcane Bagasse into Biochar Wan Ryan Asri; Hasanudin Hasanudin; Ady Mara; Desnelli Desnelli
Aceh International Journal of Science and Technology Vol 11, No 1 (2022): April 2022
Publisher : Graduate Program of Syiah Kuala University

Puspa wood sawdust and sugarcane bagasse are abundantly available but have low carbon content and nutrients. The carbon content and nutrients could be increased by converting biomass into biochar through pyrolysis. The independent variables of pyrolysis were essential to investigate because those inherently influence biochar quality. In this study, the effect of pyrolysis temperature (300, 350, 400, 450, and 500 ˚C) and time (30, 60, 90 mins) on the biochar characteristic such as pH, yield, and proximate compositions were determined. The total nitrogen, P2O5, and K2O content at optimum condition biochar were also investigated. The data analysis showed that the pyrolysis temperature and time increment positively correlated to the pH, ash content, and carbon content. At the same time, the yield and volatile matter were vice versa. Both biochar's optimum pyrolysis temperature and time were achieved at 500 and 90 minutes. The carbon content and nutrient of biochar were also increased compared to the biomass. The pyrolysis method has enhanced biomass quality, and the biochar may be used as a growing media and soil amendment. It can be concluded that the sugarcane bagasse biochar was more likely favorable than puspa wood sawdust biochar due to its higher fixed carbon and nutrient content

Optimization of Multiple Response Using Taguchi-WPCA In ST 60 Tool Steel Turning Process With Minimum Quantity Cooling Lubrication (MQCL) Method Dian Ridlo Pamuji; Muhammad Abdul Wahid; Abdul Rohman; Achmad As’ad Sonief; Moch Agus Choiron
Aceh International Journal of Science and Technology Vol 7, No 1 (2018): April 2018
Publisher : Graduate Program of Syiah Kuala University

A research was conducted for the optimization of the turning process st 60 tool steel with multiple performance characteristics based on the orthogonal array with Taguchi-WPCA method. Minimum Quantity Cooling Lubrication (MQCL) metode was applied as a coolant. The experimental studies were conducted under varying the cutting speed, feeding, depth of cut and type of coolant. The optimized multiple performance characteristics were surface roughness, and material removal rate. An orthogonal array, signal-to-noise ratio, grey relational analysis, weighted pricipal component analysis and analysis of variance were employed to study the multiple performance characteristics. Experimental results show that cutting speed gives the highest contribution for minimize of surface roughness and maximize of material removal rate, followed by feeding speed, type of coolant and depth of cut. The minimum of surface roughness and maximize of material removal rat could be obtained by using the values of cutting speed, feeding speed, depth of cut and type of coolant of 172.95 m/minute, 0.053 mm/rev, 0.25 mm, and vegetable oil as a coolant respectively.

Page 7 of 36 | Total Record : 354

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Home Page

OAI Link

Editorial Team

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Contact Name Sugianto

Contact Email sugianto@usk.ac.id

Phone +6281360560198

Journal Mail Official journal.aijst@usk.ac.id

Editorial Address Graduate Program of Syiah Kuala University Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia. Phone: 62-(0)651- 7407659. E-mail: journal.aijst@usk.ac.id

Location Kab. aceh besar, Aceh INDONESIA

Abstract

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Contact Name
Sugianto

Contact Email
sugianto@usk.ac.id

Phone
+6281360560198

Journal Mail Official
journal.aijst@usk.ac.id

Editorial Address
Graduate Program of Syiah Kuala University Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia. Phone: 62-(0)651- 7407659. E-mail: journal.aijst@usk.ac.id

Location
Kab. aceh besar,

Aceh

INDONESIA