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Mechanisms for kappa reduction and color removal by xylanasesAuthor(s): Thomas W. Jeffries; Mark Davis; Brian Rosin; Larry L. Landucci
Source: 7th International Conference on Biotechnology in the Pulp and Paper Industry : Vancouver, BC, Canada, June 16-19, 1998. Poster presentations, Vol. C. Montreal, Quebec : Technical Section, CPPA, 1998.:p. C41-C43.
Publication Series: Miscellaneous Publication
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DescriptionXylanases reduce kappa and release UV- and visibly absorptive materials from kraft pulps. The extents of these actions depend on the origin and processing of the pulp, access of enzymes to the substrate, and the natures of the enzymes. Hexeneuronic acid (HexA) is a component of kraft pulp xylans that accounts for a fraction of the kappa content. It absorbs strongly in the UV region (235 nm), and its release can be used to monitor xylanase activity. This report shows that HexA release correlates closely with release of xylooligo-saccharides, but not with the reduction in kappa.
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CitationJeffries, Thomas W.; Davis, Mark.; Rosin, Brian.; Landucci, Larry L. 1998. Mechanisms for kappa reduction and color removal by xylanases. 7th International Conference on Biotechnology in the Pulp and Paper Industry : Vancouver, BC, Canada, June 16-19, 1998. Poster presentations, Vol. C. Montreal, Quebec : Technical Section, CPPA, 1998.:p. C41-C43.
KeywordsSulfate pulping, Xylan, Bleaching, Enzymes, Color, Ultraviolet radiation, Nuclear magnetic resonance, Kappa reduction, Hexeneuronic acid
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