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Jurnal Natural
Published by Universitas Syiah Kuala
ISSN : 14118513     EISSN : 25414062     DOI : https://doi.org/10.24815/jn
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Immunology & microbiology Neuroscience Physics
Jurnal Natural (JN) aims to publish original research results and reviews on sciences and mathematics. Jurnal Natural (JN) encompasses a broad range of research topics in chemistry, pharmacy, biology, physics, mathematics, statistics, informatic and electronic.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Volume 13, Number 2, September 2013" : 10 Documents clear
TAXONOMIC STUDY OF PANDANUS (PANDANACEAE) IN SWAMP AREA, ACEH SINGKIL Dwi Ratna Anjaning Kusuma Marpaung; Nursahara Pasaribu; Alief Aththorick
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

Taxonomic study on Pandanus (Pandanaceae) in swamp area, Singkil had been conducted from November 2012 until June 2013. Based on morphological characters,  5 species of Pandanus have been identified in the area  as  Pandanus atrocarpus, Pandanus labyrinthicus, Pandanus militaris, Pandanus odoratissimus and Pandanus tectorius. The morphology and life cycle of species were categorized into two types, and they are medium arborescent pandan  (Pandanus labyrinthicus and Pandanus militaris) and large arborescent pandan (Pandanus atrocarpus, Pandanus odoratissimus and Pandanus tectorius).  Anatomical characters of Pandanus such as stomata (type, size, papilla) and epidermal cells supported the morphological features.
THE EFFECT OF Ge CONTENT ON THE OPTICAL AND ELECTRICAL PROPERTIES OF a-SiGe:H THIN FILMS Mursal Mursal; Irhamni Irhamni; Toto Winata
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

The effect of Ge content on the optical and electrical properties of Si-Ge-H thin films deposited by HWCPECVDhad been investigated. The Si- Ge-H films ware grown on corning glass 7059 substrate using 10% dilutedGeH4 and SiH4 gas mixture, respectively. The GeH4 gas flow rate was varied from 2.5 to 12.5 sccm, while the flowrate of SiH was kept constant at 70 sccm. The results showed that the deposition rate of Si-Ge-H thin films wasincreases with the increasing of GeH4 gas flow rate. Beside, the Ge content in the film also increased, and the opticalband gap decreased. The dark conductivity of Si- Ge-H films was relatively constant, whereas the photo ’sconductivity decreased with increasing of Ge content.
Dimensionality Analysis of Magnetotelluric Data Crossing the Sumatran Fault System at Aceh Segment Khumaidi Khumaidi; Fadhli Fadhli; Nazli Ismail
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

Dimensionality of magnetotelluric transfer functions have been analyzed crossing the Sumatran Fault System at Aceh segment. The research was aimed to determine strike direction of the fault system using magnetotelluric transfer function data. We used Phoenix Geophysics MTU-5A equipment in range frequency 5A equipment in range frequency 0.86-320 Hz for data measurement. Collection of data was performed along two profiles with spacing between stations vary from 7 to 80 Km. The first profile started 94.5 Km from Aceh Jaya District and ended at Pidie District. The second profile started 16.5 Km from Aceh Jaya District and ended at Bireuen District.The data were analyzed by using Zhang et al. (1989) method to calculate Swift's skew and strike direction. Based on the calculation, we found that the Swift's skew values were generally less than 0.1, which were usually the overall structure of local and regional and they could be viewed as a 1D or 2D, and the values above 0.1 were considered as 3D effects or noises. Furthermore, the average strike has 0º or 90º angle. The data showed that geoelectrical strikes of both profiles were in agreement with the geological structure of the fault system. In order to get image of the 2D resistivity model of the area, we had inverted the magnetotelluric data showed that geoelctrical strikes of both profiles were in agreement with the geological structure of the fault system. In order to get image of the 2D resistivity model of the area, we had inverted the magnetotelluric data using MT2DinvMatlab (Lee et al., 2009). The model showed clearly position and depth of the fault lines along the profiles. 
THE EFFECT OF TOMATO EXTRACT (Lycopersicon esculentum) ON THE FORMATION OF ATHEROSCLEROSIS IN WHITE RATS (Rattus norvegicus) MALE R. N. Selamet; Sugito Sugito; Dasrul Dasrul
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

The aim of this research was to find out anti-cholesterol activity intomato extract (Lycopersicon esculentum) on blood lipid profile and its potential application in the prevention of atherosclerosis in rats fed with high cholesterol diet. This research employed a complete randomized design with unidirectional pattern by using white rats (Rattus norvegicus) divided into five groups. Negative control group was fed with standard diet, while positive control groups were fed with high cholesterol (hypercholesterolemia) diet, group K were fedwith tomato extract at a dose of 10, 20, and 40 mg/kg together with high cholesterol diet. The result of this researchshowed that high cholesterol diet fed decreased simultaneously with tomato extract at a dose of 10, 20, and 40 mg /kg of rats after 60 days of treatment. Tomato extract was able prevent the formation of plaque in the coronary arteries of rats fed with hypercholesterolemia diet. Effective dose oftomatoextractused in this study was 20-40mg/kg.
DEVELOPING WEB MAPPING APPLICATION USING ARCGIS SERVER WEB APPLICATION DEVELOPMEN FRAMEWORK (ADF) FOR GEOSPATIAL DATA GENERATED DURING REHABILITATION AND RECONSTRUCTION PROCESS OF POST-TSUNAMI 2004 DISASTER IN ACEH Nizamuddin Nizamuddin
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

ESRI ArcGIS Server is equipped with ArcGIS Server Web Application Development Framework (ADF) and ArcGIS Web Controls integration for Visual Studio.NET. Both the ArcGIS Server Manager for .NET and ArcGIS Web Controls can be easily utilized for developing the ASP.NET based ESRI Web mapping application. In  this study we implemented both tools for developing the ASP.NET based ESRI Web mapping application for geospatial data generated dring rehabilitation and reconstruction process of post-tsunami 2004 disaster in Aceh province. Rehabilitation and reconstruction process has produced a tremendous amount of geospatial data. This method was chosen in this study because in the process of developing  a web mapping application, one can easily and quickly create Mapping Services of huge geospatial data and also develop Web mapping application without writing any code. However, when utilizing Visual Studio.NET 2008, one needs to have some coding ability.
GROUND-WATER RESOURCES ASSESSMENT USING GEOPHYSICAL VLF METHOD: A CASE STUDY FROM WATER RESOURCES ASSESSMENT USING GEOPHYSICAL VLF METHOD: A CASE STUDY FROM WATER RESOURCES ASSESSMENT USING GEOPHYSICAL VLF METHOD: A CASE STUDY FROM COASTAL URBAN FOREST Nazli Ismail
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

In urban areas, there is not only a heavy reliance on ground water as a primary drinking supply but is also as a supply of water for both agriculture and industrial uses. The reliance on ground water is necessary to ensure that there are significant quantities and high quality of water. Ground water resources at coastal urban forest in Banda Aceh were assessed by using VLF method. VLF techniques measured the perturbations in a plane wave radio signal (15-30 kHz) being emanated from one of several world-widde radio transmitters and was also used for submarine communications. Apparent resistivities and phases were measured along 340 m profile at the area. Two frequencies (27700 and 29000 Hz) were used in this measurement. The data were modeled by using 2D inversion code of Rebocc. The model showed clearly ground-water map of the subsurface. Based on the model, aquifer layers were indicated by low resistivities zones (40 – 400 Ω-m). However, the ground-water resources in the area were dominated with high salinity water at depth under 140 m. Therefore, extended geophysical exploration methods were water aquifer in the area to watering the forest.
Character’s Selection of Leaf Morphology in Some Families (Tree Habit) In Sumatra Region for Species Identification Saida Rasnovi
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

Identification is a basic activity and one of primary objective on systematic. For plant biodiversity studies,it was the first steps that researcher performed before studying any topics in the research area. Unfortunately, species identification is usually a time consuming activity. One of the main objectives of this study was to obtain a set of leaf morphology characters that were useful and efficient enough for species identification, especially on the tree habits group in order to reduce time consuming for the identification species.  All of the leaf morphology characters were selected by correlation coefficient and separation coefficient values. Besides of that, the stability, simplicity and validity of the characters were also part of concern. The characters that had high value of separation coefficient and low value of correlation coefficient would be added one by one as in their rank, until the value of the combination separation coefficient was equal to 1 (100%). The result of this study suggested that 30 from 92 characters of leaf morphology were recommended as a set of characters that useful and efficient enough for species identification.
TERMITES ENDANGERED TRADITIONAL MEDICAL PLANTS Syaukani Syaukani
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

Surveys on traditional medical plants affected by termites have been conducted since June to August 2010 at Ketambe, northern Aceh. Traditional medical plants and their natural habitats were obtained through interviewing local people. Termites were collected by adopted a Standardized Sampling Protocol and final. taxonomic confirmation was done with the help of Termite Research Group (the Natural History Museum, London). About 20 species of medical plants were attacked by termites with various levels. Nine genera and 20 species were collected from various habitats throughout Ketambe, Simpur as well as Gunung Setan villages. Coffe (Coffea arabica), hazelnut (Aleurites moluccana) , and areca (Area catechu) were among the worse of traditional medical  plant that had been attached by the termites.
Administration’s Effects of Ethanol Extract of Cissus quadrangularis Salisb on Growth of Lumbal Bone in Ovariectomized Rats Mustafa Sabri
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

Cissus quadrangularis Salisb is a medicinal plant which has been used traditionally to cure bone fracture by Acehnese. This study was carried out to investigate the administration effects of Cissus quadrangularis Salisb extract (CQSE) on the histology of lumbar bone in ovarectomized rats. There were 16 female rats (Rattus norvegicus) as samples and were then divided into 4 groups of treatment, with 4 replications each. K0 consisted of ovarectomized rats without CQSE supplementation, whereas K1, K2 and K3 consisted of ovarectomized rats administrated with 300, 500 and 700 mg/kg body weight CQSE for 60 days, respectively. On the day 61st, all rats were euthanized with chloroform and their fourth lumbal bones were collected for histological preparation. Parameters observed were densities of active osteoblast, passive osteoblast and osteoclast. The results of this study showed that density of active osteoblast of rats in K3 (27.25 ± 2.75) was significantly higher (P0.01) than rats in K0 (1.75 ± 1.25), K1(4.00 ± 1.41), and K2 (8.50 ± 7.40), respectively. There was no significant difference (P0,05) of passive osteoblast density among rats in K0 (16.50 ± 6.13), K1 (41.00 ± 6.48), K2 (44.50 ± 16.34), and K3 (39.00 ± 15.23). Osteoclast density of rats in K0 (85.25 ± 25.91) was significantly higher (P0,05) than that of rats in K1 (52.50 ± 16.66), K2 (51.00 ± 7.16), and K3 (50.75 ± 9.20). In conclusion, consecutive administration of 700 mg/kg body weight of CQSE extract for 60 days might increase active osteoblast density in ovarectomized rats.
COMBINATION EFFECT OF NAPHTALENE ACETIC ACID (NAA) AND BENZYL AMINOPURINE (BAP) ON MICROPROPAGATION OF Jatropha curcas L. Mutia Zahara; Zairin Thomy; Essy Harnelly
Jurnal Natural Volume 13, Number 2, September 2013
Publisher : Universitas Syiah Kuala

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Abstract

The combination between Naphthalene acetic acid (NAA) (1-2 ppm) and Benzyl Amino Purine (BAP) (0, 5 and 1 ppm) for micro propagation of castrol oil plant (Jatropha curcas L.) had been studied to induce the callus formation had been studied to induce the callus formation by using the meristem shoot as the ex-plants. The result showed that the combination of NAA 1,5 ppm and BAP 0,5 ppm gave the best result.

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