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Aceh International Journal of Science and Technology

AIJST
Website

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 7 Documents

Search results for , issue "Vol 3, No 2 (2014): August 2014" : 7 Documents clear

Changes in Physicochemical Properties of Soil Encourage the Invasion Establishment and Carbon Dynamics of Lantana camara from Doon Valley, Western Himalaya, India Gautam Mandal; Shambhu P. Joshi
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - Lantana camara L. is a recognized weed of worldwide significance due to its widespread distribution and impacts on nature conservation. In this study physicochemical properties of soil were analysed from different high and low Lantana infested areas. Significant site effect was frequently observed than effect due to invasion status. The present study tested the impact of soil properties in the measured and calculated attributes of Lantana by randomly sampling soil from the highly invaded and less invaded sites in different habitats using the Modified Whittaker plot design. Ten samples were collected at high invaded and ten at less invaded sites per habitat totalling to 120 which were obtained and analysed. One way analysis of variance (ANOVA) results indicated that edaphic factors such as soil pH, total nitrogen, soil organic carbon, Phosphorus and Potassium content positively influenced the growth of Lantana and helped in the further invasion process. These factors were also positively influencing the measured and calculated attributes of Lantana such as canopy coverage, average crown diameter, shrub canopy area, phytovolume and biomass from all sites. However some attributes like shrub height and stem diameter were negatively influenced by these soil factors. The level of these soil nutrients was found elevated in all Lantana invaded sites as compared to less invaded sites. The present results reveal that Lantana invasion can not only significantly improve the soil nutrient level but also positively increase the chances of its further invasion with more copious plant attributes.

Preparation of Metal Immobilized Orange Waste Gel for Arsenic(V) Removal From Water Biplob Kumar Biswas; Katsutoshi Inoue; Keisuke Ohto; Hiroyuki Harada; Hidetaka Kawakita
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - The toxicity of arsenic is known to be a risk to aquatic flora and fauna and to human health even in relatively low concentration. In this research an adsorption gel was prepared from agricultural waste material (orange waste) through simple chemical modification in the view to remove arsenic (V) from water. Orange waste was crushed into small particles and saponified with Ca(OH)2 to prepare saponified orange waste, which was further modified by immobilizing gadolinium(III) to obtain desired adsorption material (Gd(III)-immobilized SOW gel). The effective pH range for arsenic adsorption was found to be 7.5 – 8.5. Adsorption capacity of the gel was evaluated to be 0.45 mol-arsenic (V)/kg. Dynamic adsorption of arsenic (V) in column-mode was conducted and a dynamic capacity was found to be 0.39 mol/kg. Elution of arsenate was tested after complete saturation of the column packed with gadolinium-immobilized orange waste adsorption gel. A complete elution of arsenate was achieved with the help of 1 M HCl and 28 times pre-concentration factor was attained. This study showed that a cheap and abundant agro-industrial waste material could be successfully employed for the remediation of arsenic pollution in aquatic environment.Keywords: Arsenic; Orange waste; Gadolinium(III); Adsorption; Elution.

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.

Role of Age Hardening Heat Treatment on the Hardness Values of 93.95 Al-5 Zn-1.05 Sn/5 Al2o3- Sio2 Particulate Composite Aondona P. Ihom
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - The effect of age hardening heat treatment on the hardness values of 93.95Al-5Zn-1.05Sn/5Al2O3-SiO2 particulate composite has been studied. The data used for the work was generated at the National Metallurgical Development Centre, Jos Foundry shop, where the composite was developed. The composite was developed using the stir cast method. The result of the work has shown that the composite has a response to age hardening heat treatment with the optimum hardness value occurring at 2 hours of age hardening. A model was developed for the relationship between age hardening time and hardness of the composite. It was tested, and the product moment of correlation and the coefficient of correlation values attested to the degree of correlation existing between the two variables.

Phytochemical Screening and In Vitro Antibacterial Activity of Methanol and Aqueous Extracts of Acalypha Racemosa Leaves Chrinius Hammuel; Benedicta P. Anyim; Helen H. Raplong; Victory U. Inekwe; Musa L. Batari
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - Drug resistance microorganisms have posed enormous public concern there is therefore a need to screen plants that could have the potency in the control of the pathogenic organisms. The extracts obtained from the Acalypha racemosa were screened for phytochemical properties and in vitro investigation of methanol and aqueous extracts. The phytochemical screening revealed the presence of saponins, phlabatanins, flavonoids, and alkaloids. Glycoside and cardiac glycoside, tannins and sterols were in traced amount. The in vitro antibacterial investigation of the crude extract was conducted. The studies showed that the plant contains compounds that have antibacterial activity. The extracts revealed greater potential against the test bacteria with zones of inhibition ranging from 20-30 mm for methanol extract in the order Escherichia coliKlebsiella pneumoniaeProteus mirabilisBacillus subtilisPseudomonas aeruginosa and 18-27mm for aqueous extract in the order Escherichia coli Bacillus subtilis Klebsiella pneumoniae and Pseudomonas aeruginosa Proteus mirabilis. All the bacteria were more susceptible to methanol extract than the aqueous extract as indicated in the zones of inhibition with exception of Pseudomonas aeruginosa in which there was no inhibition. The aqueous extract had effect on all the test bacteria although having zones of inhibition lower than the methanol extract. The minimum inhibitory concentration (MIC) of both extracts range from 12.5-50 mg/ml and the minimum bactericidal concentration (MBC) range from 25-100 mg/ml. Escherichia coli was more susceptibility to both extracts and less was seen in the case of aqueous extract against Proteus mirabilis. The screening of the plant has revealed its potency in the treatment of pathogenic infections that may be caused by these pathogens.

Isolation and Identification of Air Borne Fungal Spores and Fragments in Buildings within Usmanu Danfodiyo University Sokoto, Nigeria Shinkafi Sa’adatu Aliyu; Aliyu Gambo
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - Indoor air contains a complex mixture of microorganisms, microorganism fragments, and by products such as molds, bacteria, endotoxins, mycotoxins, and volatile microbial organic compounds. Airborne fungi and bacteria can be toxic, allergenic and/or infectious. A research was conducted to determine the number and types of airborne fungal spores in Buildings of Usmanu Danfodiyo University Sokoto, Nigeria. Five (5) areas were chosen within the University for the Survey, these were student Hostel, Staff Quarters, Botanical garden, Microbiology laboratory and city campus of Usmanu Danfodiyo University. . A total number of fifteen (15) petri dishes containing potato dextrose agar each were vertically placed in each sampler and exposed at end of each height and site for 10 and 20 minutes respectively. A total of thirteen (13) different fungal specie were identified namely; Aspergillus niger, A. flavus, A fumigates, A. ustus, A. terreus, Fusarium solani, F. oxysporum, Alterneria altenata, Rhizopus oryzae, R. stolonifer, Helminthosporum sp., Penicillum candidum and Absedia corymbifera. Aspergillus niger had the highest frequency of occurrence of (14.9%), Helminthosporus species had the least frequency of occurrence of (1.5%). Conclusively it was observed that the concentration of fungal spores was high in the upper surface than the ground level at the time of the survey.

Promotion and Implementation of Bioenergy for a Better Environment Abdeen Mustafa Omer
Aceh International Journal of Science and Technology Vol 3, No 2 (2014): August 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract - There is strong scientific evidence that the average temperature of the earth’s surface is rising and this may be attribute to increased concentration of carbon dioxide (CO2), and other greenhouse gases (GHGs) in the atmosphere as released by burning fossil fuels. One of the chief sources of greenhouse gases is burning of fossil fuels. Biogas from biomass appears to have potential as an alternative energy source, which is potentially rich in biomass resources. In the present paper, current literature is reviewed regarding the ecological, social, cultural and economic impacts of biogas technology. In this article an attempt has been made to give an overview of present and future use of biomass as an industrial feedstock for production of fuels, chemicals and other materials. However, to be truly competitive in an open market situation, higher value products are required.

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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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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