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Showing papers on "SISAL published in 1981"


Book ChapterDOI
01 Jan 1981
TL;DR: In this paper, the use of natural fibres such as coir, banana, sisal and pineapple leaf fibres as polymer based composite materials has been examined in India, and some of the mechanical and physical properties of natural fibre-polyester composites have been measured.
Abstract: The use of natural fibres, such as coir, banana, sisal and pineapple leaf fibres which are abundantly available in India, as polymer based composite materials has been examined in this paper. Tensile strength, percentage elongation, modulus, electrical resistivity and dielectric strength of these plant fibres and some of the mechanical and physical properties of natural fibre-polyester composites have been measured. The properties of untreated fibre-polyester composites are lower than either the polyester or the fibre pointing to the need for surface modification to improve bonding. The beneficial effects of surface treatments, such as copper coating on coir fibre, on its own properties and on the properties of coir-polyester composites have been described. Consumer articles like wash basins, mirror casings, chair seats, scooter boxes, slide projectors, voltage stabilizer tubes, crash helmets and roofing materials have been prepared out of natural fibre-polyester composites.

6 citations


Journal Article
TL;DR: Preliminiry investigations on the utilization of sisal waste give a hecogenin yield of about 0.1% of the leaf weight, with the miximum amount being present in the sediment of the juice as discussed by the authors.
Abstract: Preliminiry investigations on the utilization of sisal waste give a hecogenin yield of about 0.1% of the leaf weight, with the miximum amount being present in the sediment of the juice.

1 citations


Journal ArticleDOI
TL;DR: In this paper, the cotton-gin trash, bract, sisal, and jute antigens were separated into two fractions by Sephadex G-75 column chromatography.
Abstract: The cotton-gin trash, bract, sisal, and jute antigens were separated into two fractions by Sephadex G-75 column chromatography. The first appeared in the chromatogram as a small, fast-moving fraction, and the second as a large, slow- moving one. Both fractions absorb uv light at 254 nm. Earlier work on the partially- purified antigens showed two bands by gel electrophoresis: a large, slow-moving band that stained heavily for carbohydrate but weakly or not at all for protein, and a small, fast-moving band that stained heavily for protein but less for carbohydrate, indicating the presence of a glycoprotein. The two fractions separated by column chromatogra phy were tested by immunodiffusion for antigenicity. The small, fast-moving fraction is immunologically active against cotton dust antibodies, but the large, slow-moving glycoprotein separated in this procedure is not.