Jurnal Natural
Not a member yet
304 research outputs found
Sort by
COMBINATION EFFECT OF NAPHTALENE ACETIC ACID (NAA) AND BENZYL AMINOPURINE (BAP) ON MICROPROPAGATION OF Jatropha curcas L.
No full textThe 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
TERMITES ENDANGERED TRADITIONAL MEDICAL PLANTS
Get PDFSurveys 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
THE EFFECT OF Ge CONTENT ON THE OPTICAL AND ELECTRICAL PROPERTIES OF a-SiGe:H THIN FILMS
Get PDFThe 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
ANALYSIS OF MACRONUTRIENCONTENT, GLYCEMIC INDEX AND CALCIUM OXALATE ELIMINATION IN Amorphophallus campanulatus (Roxb.)
Get PDFRecently, the research to find alternative sources of carbohydrates as a replacement for rice has been developed. Walur is one of the carbohydrate sources that can be explored because it can be grown in any area with out special treatment. However, walur has limitation for direct consumption, because it contains calcium oxalate. The purposes of this study were to determine the chemical character (macronutrient content), calculate glycemic index and get the proper washing techniques to elimin ate calcium oxalate of walur. Macro nutrients content studied in this research include carbohydrates, fats, protein, star chand crude fiber. Analysis of macronutrients has been chemically done, while the glycemic index was measured by in vivo using glucose as a standard. Elimination of calcium oxalate was conducted by washing the fresh walur tubers using a solution of0.01NHCl-NaOH, 5% NaCl, and solution of lemon-lime. The content of oxalate before and after washing was analyzed by permanganometry method. The results showed that walur containing 4.34 0.07% of reducingsugar,3.24 0.06 % of not-reducing sugar, 11.270.40 % of crude fiber,0.031.05 % of starchand0.570.01 % of protein. Qualitative analysis of fatty acids showed that hexade canoicacid, octade cadienoicacid, and the acide icosatetranoic were detected in high concentrations. The glycemic index valueof walur was relative lylow, about of 16.9. In addition, washing technique using a solution of lemon-lime was the most excellent technique and can reduce the oxalate content up to61.82%.Fromthis research, it can be concluded that walur can be used as food substitute esrice after washing treatment using lemon-lime solution to remove the calcium oxalate content
BIODEGRADABLE PLASTICS FROM A MIXTURE OF LOW DENSITY POLYETHYLENE (LDPE) AND CASSAVA STARCH WITH THE ADDITION OF ACRYLIC ACID
Get PDFA research of preparation biodegradable plastics, from LDPE and cassava starch mixture with the addition of acrylic acid, had been conducted. This research purpose to studied compatibility properties of the material and percent weight loss during the biodegradation test. Optimum weight loss (59,26% ) was showed after 60 days witches LDPE and starch composition ratio 6 : 4 (w/w) while tensile strength equal to 0,38 Kgf/mm2. SEM characterization showed that biodegradation has occurred by formation of hole in the biodegradable plastic surface. DTA test gave Tg = 130 C, Tm = 230 C and Td = 370-450 C while FT-IR analysis showed that the biodegradable plastics have a chemistry interaction
ANTIFUNGAL ACTIVITY OF ESSENTIAL OILS SOME PLANTS IN ACEH PROVINCE AGAINST Candida albican
Get PDFIt 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
MIXED MATRIX MEMBRANE ADSORBERS FOR GLYCEROL REMOVAL IN BIODIESEL
Get PDFMixed 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
Get PDFThis 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
THE EFFECT OF STORAGE TIME ON TOTAL OF FUNGI IN KANJI PEDAH
Get PDFThe research was conducted to determine the quality of the kanji pedah by counting total number and percentage of Aspergillus flavus and Aspergillus niger. It had been done since March from to October 2010 in Microbiology Laboratory of Biology Departement FMIPA Unsyiah. Kanji pedah as the sample was taken from Meunasah Mesjid Syamtalira village, Aron Subs-district of North Aceh. This research used sample from variety storage time groups range 3-7 days; 5-7 months; 9-12 months; and 15-18 months. Data were analyzed in descriptive and compared with the quality standard from Directorate General of National Agency of Drug and Food Control (Dirjen BPOM RI). The result showed the entire sample had fungi with ranged 1.45-63.7x102. The amount of fungi exceeds the quality standard already established by the National Agency of Drug and Food Control No. 05018/KBPOM/2001: 50 colony/g. Also Aspergillus flavus was found with range from 3%-27% meanwhile Aspergillus niger was found with range from 21,1%-40,9%
CHARACTERISTIC SYMPTOMS OF Phytophthora palmivora ON COCOA LEAVES
Get PDFThe research was aimed to determine the characteristics symptoms of Phytophthora palmivora on cocoa leaves, and was conducted in Plant Diseases Laboratory, the Faculty of Agriculture Syiah Kuala University. Mature cacao leaves with almost the same size in the quotation were used at Lab. Plant disease. Suspensions of P. palmivora were inoculated on leaves by spraying techniques with several concentrations of treatment, 1x102, 1x104, 1x106. The results showed that cocoa leaves symptoms were getting yellow colour around the veins and the whole leaves eventually showed lesion on the third day after spraying. The higher spores population of P. palmivora could impact higher invasive infections. Characteristic symptoms will be very helpful in the process of observation of early disease in the nursery