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Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter
Published by Universitas Syiah Kuala
ISSN : -     EISSN : -     DOI : -
Core Subject : Education, Engineering,
Engineering Other
Arjuna Subject : -
Articles 402 Documents
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The Use of a Consortium of Chlorella vulgaris and Pseudomonas putida for Bioremediation of Artificial Sugar Wastewater . Zuhra
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Sugar wastewater can be a serious problem for environment because of highorganic content namely nitrogen concentration. Other problems caused by the waste are unpleasant colour and an inferable smell. The appropriate treatment is needed for solving the problems. The growth of algae in the pool of waste was suggested as the propertreatment for sugar wastewater. The aim of this research was to study the use of Chlorella vulgaris for the treatment of artificial waste water. Chlorella vulgaris was cultured in artificial wastewater having low pH.Pseudomonas putida was used to supply CO2 for photosynthesis process in a lagoon tank and it was added at the second day. Polyacrylate polyalcohol was also introduced to provide buoyancy effect of the medium All of the experiments were conducted in a rectangular tank using the artificial illumination and it wasalso equipped by air pump to supply oxygen and circulate the waste in the tank. pH, Dissolved Oxygen (DO), Optical Density (OD), Chemical Oxygen Demand (COD) and Total Nitrogen (TN) were measured daily during the experiments. COD was successfully reduced up to 6900 mg/l and 29% of COD removal at the fourth day. The low pH experiments demonstrated the effectiveness of a consortium of algae and bacteria at TN removal from wastewater by reducing the TN from 70 mg/l to below 35 mg/l. According to the above results, it can be concluded that the consortium of Pseudomonas putida and Chlorella vulgaris was applicable as one of alternatives for sugar wastewater treatment
The establishment of sustainable food farmland area in District of Aceh Besar Muhammad Yasar; Chamhuri Siwar
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 1 (2012): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Conversion activity of paddy land to non-agricultural use of the growing opportunity to threaten national food security. One anticipation step is to set the sustainable food farming land (LPPB). This study aims to provide information about the food farming land that should be protected from the threat of conversion in the district of Aceh Besar. The approach taken is through the classification of land based on biophysicalpotency. Data obtained through survey, observation, secondary data collection, and literature studies. The study results indicate that there are four categories of paddy land, namely: the main land I (9 districts), the main land II (7 districts), the secondary land I (5 districts), and secondary land II (2 districts). The main land is the land which is suggested to be an everlasting land (sustainable) for reliable biophysical characteristics, while the secondary land could be converted as long as it is based on the main reason and more urgent.
Alkaline Pretreatment Effect on Sweet Sorghum Bagasse for Bioethanol Production Yanni Sudiyani Sudiyani; Eka Triwahyuni; . Muryanto; Dian Burhani; Joko Waluyo; Anny Sulaswaty; Haznan Abimanyu Abimanyu
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

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Abstract

Lignocellulosic material, which consist mainly of cellulose, hemicelluloses and lignin, are among the most promising renewable feedstock for the production of energy and chemicals. The bagasse residue of sweet sorghum can be use utilized as raw material to alternative energy such as bioethanol. Bioethanol production consist of pretreatment, saccharification, fermentation and purification process. The pretreatment process is of great importance to ethanol yield. In the present study, alkaline pretreatment was conducted using a steam explosion reactor at 1300C with concentrations of NaOH 6, and 10% (kg/L) for 10, and 30 min. For ethanol production separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) process were conducted with 30 FPU of Ctec2 and Htec2 enzyme and yeast of Saccharomyces cerevisiae. The results shows that maximum cellulose conversion to total glucose plus xylose were found to be greatest with NaOH 10% for 30 min. Maximum ethanol yield 92.19% and high concentration of ethanol 66.88g/L were obtained at SSF condition after 24 h.
The antimalarial activity of the extract of the neem leaves (Azadirachta indica, A. Juss) on Plasmodium falciparum in vitro Hanifah Yusuf; . Suryawati; . Maryatun
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 1 (2011): Life Sciences
Publisher : Syiah Kuala University

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Abstract

.  Malaria is a life-threatening disease due to the development of resistance by the most lethal causative parasitic species mainly Plasmodium falciparum. One of a great challenges in malaria controlling program is P.falciparum that has been resistant to the most commonly available antimalarials. New drugs with specific structures and mode of actions are urgently required to treat sensitive and drug-resistant strains of malaria parasites. This study was designed to know the antimalarial activity of the extract of the neem leaves (Azadirachta indica A.Juss) on the growth stages of P. falciparumFCR-3. The experimental laboratoric study used “post-test only with control design”. RPMI 1640 used as culture medium for cultivation of P. falciparum. Treated drug was the extract of neem leaves dissolved in dimethylsulfooxide and prepared into 7 levels concentration (3,125; 6,25; 12,5; 25; 50; 100 and 200 ug/mL). Negative control was culture medium with the malarial parasites. After cultured, synchronized, micromalarialculture were divided into control and treated groups then  incubated in CO2 Candle Jar at 370 C for 72 hour. Each 8 hour the percentage of parasitemia were measured for observing the activity of the extract on the growth stages of P. falciparum. After incubation, supernatant fluid was removed without disturbing the erythrocyte layer. Parasitemia was calculated by made the thin blood smear from the erythrocyte layer and stained with 10% Giemsa for 30 minutes. The antimalarial activity of the extract was calculated by counted the fifty percent of growth inhibition 50 (IC50) using probit analysis. The result showed that the neem leaves extract can inhibit the growth of P. falciparum FCR-3 on mature schizont stage and the fifty percent inhibitory concentration (IC50) of the extract was 3,86 µg/ml after 32 hour incubating. The result indicated that the extract has an antimalarial activity on P. falciparumFCR-3 in vitro
Phytoremediation potential of an aquatic weed, Eichornia crassipes, in crude oil contaminated sites O. Omokeyeke; F.D. Sikoki; E.O. Nwachukwu
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 1 (2013): Life Sciences
Publisher : Syiah Kuala University

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Abstract

The potential of plant-assisted bioremediation in crude oil polluted aquatic ecosystems was studied. The aim was to access the efficacy of Eichornia. crassipes (Water hyacinth) and their associated microorganisms in the treatment of crude oil contaminated waters and the duration of treatment required for the restoration of acceptable water quality. The experimental approach involved the exposure of the plants to varying concentrations of crude oil (500mg/l, 2500mg/l and 5000mg/l) under laboratory conditionsfor six weeks. From the results, percentage reductions of total hydrocarbon content were 98.46, 99.65 and 99.82% under 500mg/l, 2500mg/l and 5000mg/l of crude oil exposure concentrations respectively. In addition, the total heterotrophic bacteriaand fungi, and the hydrocarbon degrading bacteria and fungi in the exposure media increased from 0.07 to 1.48 Cfu/ml, while the growth of E. crassipes was enhanced from 1kg to 4kg. Water quality variables were also observed to improve significantly with percentage reductions of 99.82, 99.95, 99.99 and 85.05 for chemical oxygen demand, nitrate, phosphate and total organic carbon after six weeks of treatment with E. crassipes. It is concluded that the introduction of E. crassipesin oil contaminated waters resulted intheremoval of the crude oil and restoration of water quality through the interaction of E.crassipes and their associated microorganisms. Thus, E.crassipes can serve as an agent of bioremediation in crude oil contaminated waters
Study of early screening of potato (Solanum tuberosum L.) as a result of drought stress (in vitro) . Charloq; Ernitha Panjaitan; Bilter A. Sirait
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 1 (2012): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Preliminary studies in Screening of Potato (Solanum tuberosum L.) as a result of drought stress (in vitro). This study aim was to determine the limits of potato (Solanum tuberosum L.) to drought stress conditions in vitro using PEG. This research was conducted at the Tissue Culture Laboratory Unit / Laboratorium Kultur Jaringan UPT/Balai Benih Induk Hortikultura Dinas Pertanian Propinsi Sumatera Utara, Jl. Karya Jasa No. 6 Gedung Johor Medan in March 2012 to June 2012. The Completely Randomized Design (non factorial) was used with PEG concentrations of five levels, namely: P1 = 10%, P2 = 20%, P3= 30%, P4 = 40% and P5 = 50% with 5 replications. The results showed that increasing the concentration of PEG will reduce the percentage of plantlets survival, reduce plant height, number of roots and number of nodes. Treatment of 50% PEG resulted in the death of potato cuttings due to drought stress.
Spatio-temporal pattern of wolf spiders on oil palm plantation H. Juhaida; R. Faszly
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 1 (2012): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Spatio-temporal pattern of spiders are important in ecosystems because from the pattern we can see the interaction of spiders population with their habitat. In this paper the spatio-temporal pattern of wolf spiders (Lycosidae) in oil palm plantation was studied. It was conducted at Yayasan Pahang Oil Palm Plantation, Endau Rompin, Pahang, Peninsular Malaysia which were managed by the Yayasan Pahang Plantation Sdn. Bhd in two selected blocks (B36 and B37) for one plot each. Samplings were made from May 2010 to April 2011 usingpitfall trap method and operated at different temporal spans. This was to compare the variations in spatialtemporal pattern at different plots and times. Pitfall traps were arranged in grid 10 x 5 for each plot and the pitfall were flushed into the ground. This sampling method was effective for ground-dwelling arthropods besides it was low cost methods and continuous sampling effort (active during day and night). The samples were preserved into 70% ethyl alcohol and 30% of glycerol. A total of 272 individuals of Lycosidae were collected during the study periods. Spatial pattern of Lycosidae were analysed using SADIE while the maps for the distribution were generated using SURFER. The environmental factors such as soil properties, climatic conditions, prey predator interactions and management practices for the plantations might be affecting the population and distribution for Lycosidae which were needed further investigation. In conclusion, the abundance and distribution patterns of Lycosidae were vary greatly between months
The Development of Preparedness Board Game as A Learning Media for Natural Disaster Sri Adelila Sari; Sri Wahyuni
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 2 (2015): Life Sciences
Publisher : Syiah Kuala University

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Abstract

This study was aimed to develop the preparedness board game for natural disaster. The method used was research and development (R D) with ADDIE model which was included five steps, i.e., (i) Analyses, (ii) Design, (iii) Development, (iv) Implementation, and (v) Evaluation. Samples of this study were students of grade VI in MIN Ulee Kareng, Banda Aceh, Indonesia. The quality of the board game was based on the validation results. The validation aspects included were (i) media format, (ii) visual aspects, (iii) media function, and (iv) the clarity of the concepts. Due to the validation aspects, therefore the validation of developed board game were found to be 97.2; 91.7; 88.9; and 100.9 percents, respectively. The results of this study indicated that developed preparedness board game was worth based characteristics of students. Meanwhile, the average assessment of the feasibility assessment aspects of the media was found to be 94.4 percent, which could be decided to very good. It was concluded that learning media preparedness board game could be used in the learning process in the natural disaster material. 
Performance of a double-junction solar cell under various environmental conditions I. D. SARA
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

PV manufacturers only provide performance of a PV technology at a standard test condition (STC) where the irradiance at 1000 W/m2, spectrum of AM1.5 and a module temperature at 25°C. This information is inadequate to represent the performance of the PV device under real operating conditions. This paper investigates the performance of a double-junction solar cell under different climatic conditions, i.e. temperature, irradiance, solar spectrum, and the angle of incidence. The effects of environmental conditions on the cell’s performance are observed by simulating their current and voltage characteristics using a one-diode. The results show that the short-circuit current of a double-junction device is spectrally sensitive to the incident irradiance and solar spectrum. When the angle of incidence is greater than 60°, the maximum power of a double-junction solar cell reduces significantly
RESTful web service usage for online exit-survey at syiah kuala university as data verification method Sayed Muchallil; Yudha Nurdin; . Ahmadiar; . Melinda
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 2 (2013): Engineering
Publisher : Syiah Kuala University

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Abstract

Many applications are developed and deployed in Syiah Kuala University main server. These applications and information system are built as tools to help the University’ daily activities. Most of these applications have its own database. As a result, data is inconsistent, and the worst is redundant data cannot be avoided. The idea behind of this research is to build one centralized data that can be used as baseline to other applications. Since the main data of Syiah Kuala University are located behind the proxy which is no internet direct access allowed to the data. The proposed method to answer this problem is touse web service as a gateway for data transfer. This technique keeps the database from direct external access but the data itself can be seen without knowing where the real data is. This method has been used for Online Exit-Survey to proof that the system can verify the students’ data. Some student cannot be identified because their data were empty, the other because the data in centralized database server were only prepared for undergraduate students, so that the post graduate and professional students cannot be verified. For undergraduate students this online exit-survey works fine without error on verification phase

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