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INDONESIA
Jurnal Natural
Published by Universitas Syiah Kuala
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Core Subject : Education,
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Articles 208 Documents
 1   2   3   4   5 
ANTIFUNGAL ACTIVITY OF ESSENTIAL OILS SOME PLANTS IN ACEH PROVINCE AGAINST Candida albican Binawati Ginting
Jurnal Natural Volume 12, Number 2, September 2012
Publisher : Universitas Syiah Kuala

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Abstract

It has been tested antifungal essential oils from the leaves of Wedelia biflora, leaves of Citrus hystrix Dc, leaves of Ocimum basilicum L., and flower Caesalpinia pulcherima L. at concentrations of 10, 5 and 1% against C. albicans. using the Kirby-Bower. The antifungal activity of essential oils the leaves of Citrus hystrix Dc with a concentration of 10%, 5% and 1% respectively show the average of the inhibition zone by 24.5 mm, 23 mm and 10 mm. Essential oils leaves of Ocimum basilicum L at concentrations of 10%, 5% and 1% respectively had average inhibition zone of 11.5 mm, 10.5 mm and 6 mm. leaves of Ocimum basilicum L., and flower Caesalpinia pulcherima L showed no inhibition of the C. Albicans.
THE CHARACTERIZATION OF SIMPLISIA, ISOLATION AND IDENTIFICATION OF CHEMICAL CONSTITUENS FROM THALLUS Turbinaria decurrens Bory Irma Sari
Jurnal Natural Volume 15, Number 2, September 2015
Publisher : Universitas Syiah Kuala

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Abstract

The characterization of simplisia, phytochemical screening, extraction, isolation and identification of chemical constituens  from thallus Turbinaria decurrens Bory have been carried out. The examination of simplisia characteristics gave the water soluble extract the value of 10.59%, ethanol soluble extract valued at 0.93%, total ash valued at 15.64%, the acid insoluble ash value 0.79% and the water content valued at 8.66%. The result of phytochemical screening showed that there was triterpens/steroids present. The extraction process was carried out by percolation and then was separated by liquid vacum column chromatography. Then by preparative thin layer chromatography isolate B1 was obtained. The analysis of isolate B1 by infra red spectrophotometry showed hydroxyl, aliphatic C-H bond, C=O bond, double bond of C=C, C=O bond, C=H bond of CH3 and CH2, were present. Ultra violet spectrophotometry exhibited a maximum absorption at 242 nm and mass spectrometric fragmentation pattern exhibited that the molecular weight of isolate B1 was 394, it was suspected ergosta -4,7,22 –trien -3 one.
Application of Magnetics Method to Mapping the Geothermal Source at Seulawah Agam Area Asrillah Asrillah; Marwan Marwan; Ibnu Rusydy; Gartika Setiya Nugraha
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

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Abstract

Magnetic method had been employed at Seulawah Agam area in term of unveiling the potentially geothermal source. This method was carried out locally in both the geothermal filed of Heutsz’s Crater and Cempaga’s Crater where the locations are in Seulawah Agam slope which is included in Aceh Besar District. Geologically, the area is mainly controlled by volcanic mudflow and Lam Teuba’s rocks consisting of breccia, pumice and tuff and their age are from Tersier to Resen Period. The deployed equipment consisted of Magnetometer GSM-19T, Proton Sensors, Aluminum Stick, Connection Cable, GPS Antenna, Compass, and Watch. Portable GPS (Global Positioning System), Navigation type (map of the survey area), and complemented by the other technical equipment, such as handy talky, umbrella, pens and notes of observed data. This study was done by following two steps. At first, the base station was established as a reference point for all magnetic data of measurements. Furthermore, recording magnetic data at each point by repeating three times until the last point by following the looping pattern as pathway of measurement both in Heutsz’s crater whose nine point recordings and in Cempaga’s crater whose seventeen points was consecutively done. The data were simply processed by using Microsoft excel that can just plot the magnetic anomaly and interpreted qualitatively being preliminary research. The result showed that at the north pathway had high magnetic anomaly of rocks located at B6 point and it was assumed as the area having the economically mineral in fracture zones. The rocks with low a anomaly value were obtained at –F125 BR is suggested as the thermal sources while at the South pathway from observing station till the Cempaga’s crater was obtained the geological structure as the Sumatran Fault of Aceh’s segment at CK4 point and this finding showed similar correlation with the result of gravity survey at same pathway published in another paper. In conclusion, this method effectively showed that the Seulawah Agam has potency as thermal source.
Antidiabetic Activity of Leaves Ethanol Extract Chromolaena odorata (L.) R.M. King on Induced Male Mice with Alloxan Monohydrate Marianne Marianne; Dwi Lestari; Elin Yulinah Sukandar; Neng Fisheri Kurniati; Rosnani Nasution
Jurnal Natural Volume 14, Number 1, March 2014
Publisher : Universitas Syiah Kuala

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Abstract

Chromolaena odorata or Tekelan has been used traditionally to cope with diabetes mellitus, but the scientific evidence as antidiabetic agent has not been previously reported. Therefore, it is necessary to test the antidiabetic activity using ethanol extract of the tekelan leaves in male mice induced by alloxan. Mice were induced intravenously by alloxan dose of 55 mg/kg bw. After 7 days, mice were diabetic ( KGD 200 mg/dL ) and were grouped into 6 groups: negative control group (only treated with CMC - Na) , positive control group (glibenclamide 0.45 mg/kg bw) and the 4 other groups were given ethanol extract of Tekelan leaves at doses of 5 , 25 , 125 and 250 mg/kg bw. Dosage administered for 28 days and blood glucose levels was checked every 7 days using a glucotest. Data were analyzed by one-way analysis of variation at 95% confidence level. Ethanol extract of tekelan’s leaves  at doses of 5 , 25 , 125 and 250 mg/kg bw can lower blood levels  from day 7 to day 28 and was significantly different compared to the negative control group ( p 0.05). Ethanol extract of tekelan’s leaves at doses of 5 , 25 , 125 and 250 mg/kg bw showed antidiabetic activity in alloxan-induced mice.
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

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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.
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.
Antagonistic Ability of Trichoderma sp. against Ganoderma sp. on Litter Medium of Acacia mangium Samingan Samingan
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

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Abstract

Trichoderma sp are common fungi in the soil and play important role in decomposing of cellulose-rich. The distribution of Trichoderma sp (TBPH isolate) in litter layers of Acacia mangium was observed in two years’ old of health standing (2S) and Ganoderma sp-attacked standing (2G). The objectives of this research were to observe Trichoderma sp distributions in leaf litter layers and to determine of antagonistic ability of Trichoderma sp TBPH against Ganoderma sp (GBR isolate). Trichoderma sp in sawdust medium was spread above of F litter layer in 50 x 50 cm area. Total populations of Trichoderma were observed each month during eight months. Antagonistic activities of Trichoderma sp TBPH against Ganoderma sp GBR were tested by dual test method on PDA and PDA with litter powder (PDAS) media.  The results showed that populations of Trichoderma sp were fluctuating and the highest population on both standings of F layer   and were followed by H and L layers. Fluctuations of Trichoderma sp population on L layer were tended to follow rainfall fluctuations while those on F layer were tended to follow litter pH fluctuations. Antagonistic test showed that inhibition percentage of PDAS medium was lower than those of PDA medium indicating litter amendment on media being causes of lower antagonistic activities of Trichoderma sp.
AN INDICATION OF AFRICAN CATFISH’S (CLARIAS GARIEPINUS) BEHAVIORAL CHANGES AS A RESPONSE FOR INCREASED SEISMIC ACTIVITY Teuku Reza Ferasyi; Mustafa Sabri; Hamdani Hamdani; Azhari Azhari; Amiruddin Amiruddin; Erwin Erwin; Wolfgang Straka; Robert Faber
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

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Abstract

This report was aimed to describe the behavioral changes of catfish as observed before two different earthquakes hit the Province of Aceh, Indonesia in year of 2012. A number of 5 African’s catfish (Clarias gariepinus) were placed in an aquarium located in Gapang, Sukakarya Sub-district of Sabang Town, Aceh. Their behavior activities were observed manually at three different times (08.00 AM, 01.00 PM, and 05.00 PM) every day from 1st March up to 11th April 2012. The result of observation showed that the activity of catfish was different between all of them from 1st March 2012 up to morning observation on 11th April 2012. Most of those activities was not showed as very active behavior. However, their behavior was very active in the same pattern when observed at noon and afternoon times on 11 April 2012. On this date, there were two consecutive earthquakes happened at magnitude of 8 Richter Scale at 03.38 PM and 05.43 PM. The epicenter of this earthquake was in Simeulue, with the distance of more and less of 390 km from observation station of catfish in Gapang. It was noted that this abnormal behavior possibly showed as an indication of their ability to detect the increase of pre-seismic activity at 2.38 hours and 43 minutes before the two earthquakes. Perhaps, it is the result of their response to the increase of pre-seismic electromagnetic wave. Further continuous observation and research is needed to ensure the role of African’s catfish (Clarias gariepinus) as abio-sensor for the increase of seismic activity.
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

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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.
PENENTUAN WAKTU MATI MEMANFAATKAN DERET HOMOLOG ALKILPARABEN PADA RP-HPLC DALAM SISTEM PELARUT METANOL/AIR Mahmudi .; Saiful .; Khairan .; Rinaldi Idroes
Jurnal Natural Volume 15, Number 2, September 2015
Publisher : Universitas Syiah Kuala

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Abstract

Penelitian ini dalam rangka pengembangan dan aplikasi metode penentuan waktu mati (t0) pada Kromatografi Cair dari yang telah pernah dan berhasil diterapkan di GC. Waktu mati merupakan parameter yang sangat penting untuk penentuan parameter lain seperti Faktor kapasitas (k’), retensi relative (tR’) dan indeks retensi kovats (IR), sehingga didapat hasil berupa data base yang bisa diterapkan dalam intrumentasi GC dan RP-HPLC. Penentuan waktu mati dengan menggunakan dua metode yaitu metode iterasi dan metode linearisasi, sehingga didapat nilai indeks retensi kovats dari senyawa uji pada sistem RP-HPLC dengan menggunakan deret homolog alkilparaben. Hasil penelitian menunjukkan deret homolog alkilparaban terbukti dapat digunakan untuk penentuan indeks retensi Kovats  dalam RP-HPLC dengan koefisien korelasi yang sangat baik  terutama pada sistem pelarut MeHO/H2O (90:10). 

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