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Unformatted text preview: nation technique. It was found that the polar extract, i.e. methanol and ethyl acetate showed the higher antimicrobial activity than hexane extract. The bioa ctive compounds in methanol fraction was isolated by column chromatography on silica gel (70 - 230 mesh) and eluted with chloroform:methanol (8:2). The selected fraction was assayed for antimicrobial activity against four bacteria and two fungal strains using well diffusion method, by indicating the presence of the clear inhibition zones around each disc. However, Research is still in progress to purify the active compound/s from methanol active fractions. 1 NAT-P3 EFFECT OF CHEMICAL COMPONENT ON PARTICLEBOARD PROPERTIES MANUFACTURE FROM OIL PALM TRUNK PARTICLES Nurrohana Ahmad and Jamaludin Kasim Department of Wood Industries, Faculty of Applied Sciences, Universiti Teknologi MARA Pahang, Pahang 26400, Malaysia E-mail: [email protected] This study was conducted on the Oil Palm (Elaeis guineensis) trunk particles to determine the effect of height portion on chemical properties and correlation on board properties. The basic properties determined were based on the TAPPI Standards and the manuf acture of particleboard was conducted following the Japanese Industrial Standard (JIS). Oil palm trunk particles used in the study was supplied by Malaysian Palm Oil Board (MPOB), Bangi. Two palms were used for chemical and physical analysis. The average of stem heights was 11.2 m. Discs of 20 mm thick were obtained from the three height portion (bottom, middle and top). Samples from each disc were divided into three zones namely near bark, middle, and near pith. Oil palm trunk particles were produced using a disc flaker and a dust extractor. Single layer particleboard was made using urea formaldehyde resin (60 % solid content). Board properties were tested using the JIS standards as reference. Height portion showed significant effect on the cold water, hot water, alkali soluble and ash content. The highest cold water (26.53 %), hot water soluble (28.04...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11