cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Suhartono
Contact Email
suhartono@usk.ac.id
Phone
-
Journal Mail Official
jurnal.natural@fmipa.unsyiah.ac.id
Editorial Address
Block A 2nd Floor FMIPA USK Jl. Tegk. Syech Abdurrauf No. 3, Banda Aceh, 23111, Indonesia
Location
Kab. aceh besar,
Aceh
INDONESIA
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 7 Documents
 1 
Search results for , issue "Volume 12, Number 1, March 2012" : 7 Documents clear
In-Vitro Effect of Combined Indole Butyric Acid (IBA) and Benzil Amino Purine (BAP) on the Planlet Growth of Jatropa curcas L. M. Satria Fitri; Zairin Thomy; Essy Harnelly
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.224 KB)

Abstract

Research oncombination of Indole Butyric Acid (IBA) andBenzil Amino Purine (BAP) to the shoot and root growth of physic nut (JatropacurcasL.) has been done in Biology Department Syiah Kuala Universityfrom June to Oktober 2007. This research used a complete randomized factorial design with 2 factors namely 0,01 mg/L, 0,05 mg/L, 0,1 mg/L, and0,5 mg/L)and BAP (0,5 mg/L and1,0 mg/L) with 3 timesrepeataitions. The result after 3 months showed that the combination IBA and BAP could not able to stimulate the formation of shoot and root in the tissue culture of physic nut.
MIXED MATRIX MEMBRANE ADSORBERS FOR GLYCEROL REMOVAL IN BIODIESEL Saiful Saiful; Febrina Pratiwi; Ilham Maulana; Muliadi Ramli
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (688.159 KB)

Abstract

Mixed matrixmembrane (MMM) adsorbers systems function as short and wide chromatographic columns in which the adsorptive packing consists of one or more micro-porous membranes. This study reports the use of membrane adsorbers for glycerol capturing and removing in crude biodiesel. The MMM are prepared by a wet phase inversion method. Magnesol were incorporated as active sites in the membrane. Matrix support of the membrane was prepared from chitosan.The optimum compositions of the adsorptive membranes were 3 % chitosan, 15% DMF and 60% loading adsorbent. The porosity of these membranes was 34 % and swelling degree was 52 %. The membrane clean water flux was 225 Lm-2h-1 at a trans-membrane pressure of 2.5 bar. The adsorptive membrane has been demonstrated to reduce the concentration of total glycerol in crude biodiesel. The amount of glycerol in biodiesel can be reduced 69.93 % in 60 minute which is agreed to value of SNI quality standards. The membrane adsorber can be regenerated and reused for biodiesel purification. The regenerated membrane can be reused with maintaining the high adsorption capacity. The methanol was better than ethanol to regenerate the magnesol membrane. The Magnesol membrane will be a new alternative method for biodiesel purification.Mixed matrixmembrane (MMM) adsorbers systems function as short and wide chromatographic columns in which the adsorptive packing consists of one or more micro-porous membranes. This study reports the use of membrane adsorbers for glycerol capturing and removing in crude biodiesel. The MMM are prepared by a wet phase inversion method. Magnesol were incorporated as active sites in the membrane. Matrix support of the membrane was prepared from chitosan.The optimum compositions of the adsorptive membranes were 3 % chitosan, 15% DMF and 60% loading adsorbent. The porosity of these membranes was 34 % and swelling degree was 52 %. The membrane clean water flux was 225 Lm-2h-1 at a trans-membrane pressure of 2.5 bar. The adsorptive membrane has been demonstrated to reduce the concentration of total glycerol in crude biodiesel. The amount of glycerol in biodiesel can be reduced 69.93 % in 60 minute which is agreed to value of SNI quality standards. The membrane adsorber can be regenerated and reused for biodiesel purification. The regenerated membrane can be reused with maintaining the high adsorption capacity. The methanol was better than ethanol to regenerate the magnesol membrane. The Magnesol membrane will be a new alternative method for biodiesel purification.
ANALYSIS OF MINERAL CONTENTS Ca, Mg, Fe AND Na IN NATURAL BENTONITE CLAY Fathurrahmi Fathurrahmi
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (55.929 KB)

Abstract

This research has been conducted to determine content of natural clay from bentonite in East Java area. There are two types of samples taken from the location, white and yellow clays. Samples were prepared to become the small pieces granulated, then were cleaned with aquadest, and were dried, respectively.After that, samples were re-minimized into 200 mesh in nanoparticles, re-cleaned and dried using oven at temperature 100-110 °Celsius. Ca, Fe, Mg and Na are contents in samples of bentonite Clay being determined by using Atom Absorption Spectrophotometer (AAS). Each part of the substance from yellow bentonite clays and white bentonite clays were measured and analysed its content with three times repetition. Natural-bentonite clays of Pacitan from East Java contained the minerals Ca, Mg, Fe and Na with mean values of the gratuity Ca 0.0127 % Mg 0.24655 %, Fe 0.56178 %, and Na 0.14122 % for yellow bentonite clays (A). White bentonite clays (B) consisted of minerals Fe, Mg, Na, and Ca with mean values of gratuity Ca 0.01856 %, Mg 0.30067 %, Fe 0.61235 %, and Na 0.1608%, respectively.
IMPACT OF STAND STRUCTURE TO THE DIVERSITY OF TREE SAPLING IN RUBBER AGROFOREST SYSTEM Saida Rasnovi
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.231 KB)

Abstract

The study of stand structure of rubber agroforest system and its effect on tree sapling diversity was carried out in Bungo District, Jambi Province from August 2004 to August 2005. Basal area (BA) and tree density were surveyed using variable-area transect method. Tree sapling species was surveyed using standard plots combined with circular elementary subplots laid along 60 m transect line. The result shown that BA and tree density of rubber agroforest system were lower significantly with forest at the diameter class 30 cm, but at the diameter class 30 cm there were not differ significantly. PCA analysis shown there was a positive correlation between BA non rubber tree with the species diversity and richness indices of tree sapling in rubber agroforest system and there was no correlation between density of non rubber tree and the indices. However, in the forest, BA and tree density were have a negative correlation with the species diversity and richness indices of tree sapling.
STUDY OF POPULATION AND HOME RANGE OF THOMAS LAGUR (Presbytis thomasi) AT SORAYA RESEARCH STATION, LEUSER ECOSYSTEM Syaukani Syaukani
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.134 KB)

Abstract

A primate Presbytis thomasi lives in a group with uni-male systems (only one adult make in agroup) at Soraya Research Station. These primates performer their daily activity in one home-range and also protect their home-range with provides a specific vocal (loud-call). There were six groups of Langur with 6-12 individual of each group. The width of home-range shows a variation in each group. The overlapping of home-range ofte causes probles among males and the looser will have to leave as weel as losing all parts of the groups.
THE SUBSURFACE RESISTIVITY STUDIES IN GAMPONG JAWA WASTE DISPOSAL BANDA ACEH Fadhli Syamsuddin; Marwan Abu Bakar; Nur Mala
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (642.869 KB)

Abstract

The research has been carried out about determining the subsurface resistivity values by using the VLF method in waste disposal (TPA) Gampong Jawa Banda Aceh. Measurement target is for investigate allegations of contaminant substances are disposed by the public at these locations based on the response of the magnetic and electric fields. The tools used are the T-VLF device with two electrodes and using three stations, namely the transmitter JJF4 Japan, NWC Australia and UMS Moscow. Broad expanse of measurements on L1 and L2 is 200 m, L3 and L4 is 150 m. There are 74 measuring points with spacing of 10 m. The result of this experiment showed that the four layers can be divided into two layers with different resistivity values. The first layer at a depth of 0-15 m with apparent resistivity of 2-25 Ωm, allegedly at this layer contained the contaminant substances. The second layer at a depth of 15 m with apparent resistivity of 25-101 Ωm, in this layer are water-resistant coating that can withstand water into and out of the landfill.
ANALYSIS OUTPUT TOLERANCE LIMITS X-RAY MACHINE DIAGNOSTIC (Case Study in one of the General Hospital inBanda Aceh) Evi Yuvita; Rini Safitri
Jurnal Natural Volume 12, Number 1, March 2012
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.854 KB)

Abstract

Currently, several regional general hospitals in Banda Aceh now have excellent support facilities, one of which is a diagnostic X-ray machine. The performance of diagnostic X-ray machine should be checked to determine if the dose received does not harm a patient and produce a good image and provide diagnostic information in a timely and accurate, therefore there are necessary for quality control activities on the machine X-ray. Factors that affect the dosing and imaging results, among others, the amount of the provision of current and voltage. From the research shows that the value of the output voltage generated is not much different from the value of the input voltage with a percentage value below 5%. This value shows a good output machineX-ray because it is still under the maximum tolerance limit of 10%. So the overall results of observations on the machineX-ray is in hospital, the quality control measurements gave values still within safe limits. Then by giving a higher input voltage turns also affect the amount of energy produced, thus affecting also absorbed dose X-rays are produced.

Page 1 of 1 | Total Record : 7

 1 

Filter by Year

2012 2012


Reset
Filter By Issues
All Issue Volume 25 Number 3, October 2025 Volume 25 Number 2, June 2025 Volume 25 Number 1, February 2025 Volume 24 Number 3, October 2024 Volume 24 Number 2, June 2024 Volume 24 Number 1, February 2024 Volume 23 Number 3, October 2023 Volume 23 Number 2, June 2023 Volume 23 Number 1, February 2023 Volume 22 Number 3, October 2022 Volume 22 Number 2, June 2022 Volume 22 Number 1, February 2022 Volume 21 Number 3, October 2021 Volume 21 Number 2, June 2021 Volume 21 Number 1, February 2021 Volume 20 Number 3, October 2020 Volume 20 Number 2, June 2020 Volume 20 Number 1, February 2020 Volume 19 Number 3, October 2019 Volume 19 Number 2, June 2019 Volume 19, Number 1, February 2019 Volume 18, Number 3, October 2018 Volume 18, Number 2, June 2018 Volume 18, Number 1, February 2018 Volume 17, Number 2, September 2017 Volume 17, Number 1, March 2017 Volume 16, Number 2, September 2016 Volume 16, Number 1, March 2016 Volume 15, Number 2, September 2015 Volume 15, Number 1, March 2015 Volume 14, Number 2, September 2014 Volume 14, Number 1, March 2014 Volume 13, Number 2, September 2013 Volume 13, Number 1, March 2013 Volume 12, Number 2, September 2012 Volume 12, Number 1, March 2012 Volume 11, Number 2, September 2011 Template More Issue