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Utilization of hemp (Cannabis sativa L.) as an alternative raw material for the production of three-layered particleboard Ryan Moulana
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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As the availability of high quality trees decreased and the price increased the wood base panel industry is looking to replace the common used wood by agricultural residues or fast growing trees and plants as well as agricultural plants like hemp (Cannabis sativa L.). Hemp offers characteristics that are similar to wood properties. In line with this research, three-layered particleboards under utilization of hemp material were developed. The hemp was used in combination with industrial produced particles to find out which amount of wood can be substituted by hemp and further to investigate which decreased densities can be realized by the use of hemp. Hemp can be used for the production of lightweight particleboards due to its lower bulk density compared to wood. All developed hemp/wood based particleboards were produced under industrial parameters in laboratory and pilot scale using conventional urea formaldehyde-resin, hardeners, and hydrophobic substances. The mechanical technological properties of all produced innovative particleboards and reference particleboards were determined according to current DIN/EN standards. In detail density profile, bending strength, internal bond strength, surface strength, and thickness swelling were determined. Compared to the produced reference particleboards, consisting only of wood particles, the developed hemp/wood particleboards possessed better mechanical-technological properties. Furthermore it was realized to produce particleboards with densities of 550 kg/m³ by using hemp due to its low bulk density which fulfills the given DIN/EN requirements. As an overall result we found out that hemp is a real alternative to nowadays used wood for the production of particleboards in general and for the production of lightweight particleboards in particular.

Properties Of Carbon Black From Jatropha Seed Shell As A Potential Source Of Filler Enhancement In Biocomposites N. A. Sri Aprilia; H. P. S. Abdul Khalil; Md Nazrul Islam; Amri Amin
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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The use of biomass as filler in biocomposites are becoming widespread in the present decade because its variety of advantages. Jatropha (jatropha curcas L) seed shell after separated from kernel can be used to produce carbon black because of its higher carbon content, and have the potentiality to use as reinforcement in composites. In this study, carbon black was produced from jatropha seed shell by carbonization in furnace method for 1 hour at 600oC. Thermogravimetric analysis to analyze seed shell of jatropha as raw material. The morphological properties of the carbon black were analyzed by elemental analysis by X-ray (EDX), SEM, TEM, XRD, SEM, and TEM. It was found that the yield of carbon black was 40% which included 4 different sizes ranging from 70 – 300 mesh in distribution of particle size analysis. Carbon black suggested that it could be a good filler or reinforcement in biocomposites.

The isolation and identification of antimalarial agents of the n-hexane fraction of the neem leaves (Azadirachta indica A. Juss) . Suryawati; Hanifah Yusuf; . Sofia
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. Following the study which confirmed the antimalarial activity of the n-hexane fraction of the neem leaves (Azadirachta indica A.Juss), a research that aimed to reveal the active compounds act as antimalarial agents had been conducted. In this study, the n-hexane fraction of neem leaves were analyzed using the phytochemical, spectroscopic and chromatographic methods. The chemical compounds, suspected to have an antimalarial activity, were isolated using the thin-layer chromatographic method with several solvents which different in their polarity. The visualizing reagents were used to characterize the compounds. The result showed that the n-hexane fraction of neem leaves contained of steroids, terpenoids and fenols. Analysis by gas chromatography-mass spectroscopy showed that fenol derivatives existed in the largest amount. The compounds were identified as benzyl benzoat (25.63%), tetracosane (17.51%) and hexadecanal (14.61%)

Isolation and identification of microalgae as omega-3 sources from mangrove area in Aceh Province Sri Haryani Anwar; M. Ikhsan Sulaiman; Syarifah Rohaya; Novi Safriani
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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Omega-3 fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are essential fatty acids with numerous health benefits. The main sources of these fatty acids are fish and fish oils. However, fish supply is limited and the availability is uncertain. There are two main problems with regard to fish supply: overfishing and mercury contamination. In addition, food enrichment with fish oil is apparently challenging due to sensitivity of fish oil to oxidation, and fishy smell which make them less attractive to consumers. Based on above problems, alternative sources of EPA and DHA must be found. Analternative for omega-3 fatty acids are microalgae. This research aims to isolate, identify, and find microalgae biodiversity that are able to produce omega-3 fatty acids in their cells. Microalgae were isolated from fallen, senescent leaves of mangrove tree (Kandelia candel) in two locations in Aceh. The colonies were identified morphologically using light and stereo microscopes with 1000x magnifications. The results were compared with those in literatures. This research has isolated and identified some genus of microalgae thatwere predicted belong to order Labyrinthulida and family Thraustochytriidae. Morphological observations have also confirm identification of one fungi, genus Mortierella. All identified microalgae and fungi are omega-3 fatty acids producers, mainly EPA and DHA

The influence of heat stress and powder of jaloh leaves supplementation into commercial fish feed on body weight gain, hematokrit level and malondialdehid content in the nila’s liver . Sugito; . Samadi; . Nurliana
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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The aims of this experiment are to find out the effect of temperature stress and jaloh leaves supplementation on body weight gain, hematocrit level, and malondialdehid (MDA) content in the liver tissues of nila fish (Oreochromis niloticus). A total of 80 fishes with the weight of 40-50 gr were randomly allocated into 8 treatments. The treatments consisted of P1 (no heat stress and no jaloh leaves supplementation); P2 (no heat stress and 5% of jaloh leaves supplementation) ; P3 (no heat stress and 10% of leaves supplementation); P4 (no heat stress and 15 % of leaves supplementation); P5 (heat stress and no jaloh leaves supplementation); P6 (heat stress and 5% of jaloh leaves supplementation); P7 (heat stress and 10% of jaloh leaves supplementation); P8 (heat stress about 35 ± 1oC for 4 h per day in 30 days and 15% of jaloh leaves supplementation). The body weight was measured from 1d to 31d. Blood samples, lever tissues and statistical analysis were conducted on 31d. The results of the experiments indicated that supplementation of fish feed with jaloh leaves 5-15% had negative effects on body weight gain. On the other hand, supplementation of jaloh leaves 5-10% on commercial fish feed had positive effects on performances and immune system of experiment fishes

The traits of fresh and frozen semen on brahman bulls Triva Murtina Lubis; Prabowo Purwono Putro; Aris Junaidi; Sumarti Suryaningsih
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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The present study aimed to determine quality and parameters traits of both fresh and frozen semen in 4-year old Brahman bulls. Semen was collected from 5 bulls twice a week using artificial vagina in Ungaran ArtificialInsemination Center, Central Java, Indonesia. Immediately after collection, samples were evaluated for semen volume, color, odor, viscosity, mass movement, individual movement, spermatozoa concentration and livespermatozoa percentage. Sperm concentration was measured using a spectrophotometer. Good quality fresh semen was processed to be frozen semen. Parameters evaluated for frozen semen include spermatozoa individualmovement, live spermatozoa, and abnormal spermatozoa percentage. The results showed that the semen volume is 6.90 ± 0.54 whereas the average of sperm concentration, individual motility and live sperm are 1754.54 ± 212.67;65.50 ± 3.74% and 76.30 ± 2.64%, respectively. Meanwhile, for frozen semen, the average percentage of motility is 38.00 ± 2.74% while the average proportions of live sperm and abnormal sperm are respectively 45.20 ± 9.86% and 6.00 ± 2.83%. In conclusion, in average, all parameters of fresh and frozen semen of Brahman bulls are in normal range. Based on the Indonesian National Standard, frozen semen produced could be used for insemination

Physically modified of sweet potato flour (Ipomea batatas) by variation of steaming time and drying method Anshar Patria; Nida El Husna; Yanti Meldasari Lubis; Melly Novita
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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The major component of sweet potato flour is carbohydrate presented as starch. As other types of native starch that lack of physical and chemical characteristics, the sweet potato flour then is very limited in use. To improve the starch characteristics, it can be made by modifying the starch physically. This study was focused on modification of starch phisically by using autoclaving-cooling method with differ in steaming times (15 and 30 minutes) and drying methods (oven and sun drying). The results showed that the modified flour of sweet potato by autoclaving-cooling for one cycle has produce sweet potato flour with a granular structure that can expand and break, lower in starch content, higher in freezing and thawing stability, higher in water absorption index, and lower in hot and cooling viscosities

Isolation of soil Actinomycetes from Forest Park of Pocut Merah Intan as potential producers of antimicrobial compounds Husnah Milda; . Suhartono; Cut Yulvizar
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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This study was undertaken to investigate soil Actinomycetes from grand forest park of Pocut Meurah Intan as well as to evaluate their potential to produce antimicrobial compounds. The study was conducted in Laboratory of Microbiology, Faculty of Mathematics and Natural Sciences, Syiah Kuala University from February to July 2012. The research was carried out by using an explorative method with laboratorial evaluation. Three different soil samples were taken from a depth of 10-20 cm below the soil surface and isolated on YM agar medium. During the investigation, 24 isolates were recovered and exhibited various morphological characteristics. The results of the antimicrobial assay showed that 14 isolates (58.33%) were active against one or more of the test organisms. Among the 14 active isolates, one isolate (7.14%) showed antibacterial activity; 9 isolates (64.29%) showed antifungal activity; and 4 isolates (28.57%) exhibited a broad-spectrum activity against both of the test bacteria and fungi. The inhibitory activity were also varied, ranged from weak (5 mm), moderate (5-19 mm), to strong (20 mm). The highest antimicrobial activity was presented by ATH-17 against Candida albicans (34.50 mm), while the lowest was exhibited by ATH-15 against Escherichia coli (0.20 mm).

Exploration of Pulp and Husk of Gayo Arabica Coffee as Raw Material of Pectin – SWOT, Risk and Chemical Component Analysis Ismail Sulaiman; Murna Muzaifa; Dian Hasni; Julius Munandar
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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Advances in waste management offer huge possibilities for economic and social utilization of residues from coffee production such as the pulp and husk. Coffee pulp are obtained during coffee production around 20-45% of raw material either it processed wet or dry. In Gayo Highland areas, as a centre of Arabica production in Indonesia, coffee production known as semi-drying process where numbers of coffee residues arise up to 40% of total coffee berries. For local farmers pulp and husks often be decompose by burning, whether several alternatives have been attempted individually, either used as fertilizer, livestock feed and compost. However the applications above cover only small number of robust coffee residues. Therefore studies have been conducted to explore possibility to extract pectin from coffee pulp. Implementation of SWOT analysis and Risk Analysis by FMEA gain to enhance the information of strength, weakness, opportunity and threats of extraction pectin from coffee pulp/husks demonstrated that this attempt have higher possibility to be more efficient than others trial for both economically and ecologically. Furthermore, moisture contents, ash and crude fiber are examined from fresh pulp/husk which are stored in room temperatures for 16 days, 24 days and 30 days. The data demonstrated that length of storage up to 30 days has impact on increasing ash (up to 12.66% from 1.38%) and solid fiber contents (up to 28.24% from 2.70%) whilst moisture are decreased (down to 15.51% from 86.08%) which emphasizes that delaying production or prolonging the storage of coffee residues might not have any impact on product quality

Geoelectrical characterization for liquefaction at coastal zone in South Aceh Muhammad Syukri
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 2 (2011): Engineering
Publisher : Syiah Kuala University

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The paper presents a case study of liquefaction investigation, carried out in an area of the South Aceh coast. The zone lies on low flat plain at Tanjung Harapan Village, west coast of Aceh. The process of site investigation is controlled by: occurrence of groundwater, nature of bedrock, and presence of clays. Prediction of liquefaction zones in high seismicity regions will be a great help to mitigate hazards. Geoelectric resistivity using a combination both vertical electrical sounding and horizontal resistivity images of Wenner-Schlumberger configuration have been carried out and can be of help to delineate the liquefaction zones. With this backdrop, it believe that in conjunction with soil and sediment characteristics indicating high susceptibility to liquefaction, and resistivity anomalies will provide vital information to predict and identify the liquefaction zones. Results of this study revealed the surface layer consists of loose sediments, sandy clay, and silty sandy layer are potentially liquefied during earthquake. The 2-D model sections at 10 m electrode spacing were described, together with subsurface structures can be used to predict the resistivity values at a approximately 48 m depth

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Journal Mail Official
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Kab. aceh besar,

Aceh

INDONESIA