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| Davies, Peter; Morvan, C; Sire, O; Baley, C. |
| This paper presents results from a study of fibres extracted from Zostera marina eel-grass collected from the Baltic coast. This species of sea-grass is shown to contain small diameter (around 5 mu m) fibres composed of similar to 57% cellulose, similar to 38% of non-cellulosic polysaccharides (mainly xylan) and similar to 5% of residual matter so-called Klason lignin. This composition is quite different to that of commonly used terrestrial fibres. Single fibre stiffness values up to 28 GPa were measured. This stiffness combined with a low density could provide an attractive reinforcement for composite materials, and may be particularly suitable for use in bio-degradable structures. |
| Tipo: Text |
Palavras-chave: Xylan; Tension; Mechanical behaviour; IR spectroscopy; Sea grass; Fibre. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2607.pdf |
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| Silveira,F.Q.P.; Ximenes,F.A.; Cacais,A.O.G.; Milagres,A.M.F.; Medeiros,C.L.; Puls,J.; Filho,E.X.F.. |
| Xylanase activity was isolated from crude extracts of Trichoderma harzianum strains C and 4 grown at 28oC in a solid medium containing wheat bran as the carbon source. Enzyme activity was demonstrable in the permeate after ultrafiltration of the crude extracts using an Amicon system. The hydrolysis patterns of different xylans and paper pulps by xylanase activity ranged from xylose, xylobiose and xylotriose to higher xylooligosaccharides. A purified ß-xylosidase from the Trichoderma harzianum strain released xylose, xylobiose and xylotriose from seaweed, deacetylated, oat spelt and birchwood xylans. The purified enzyme was not active against acetylated xylan and catalyzed the hydrolysis of xylooligosaccharides, including xylotriose, xylotetraose and... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Trichoderma; Xylan; Xylanase. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000800003 |
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