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    Author(s): Thomas W. Jeffries; Mark Davis; Brian Rosin; Larry L. Landucci
    Date: 1998
    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
    PDF: View PDF  (69 KB)

    Description

    Xylanases 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.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Jeffries, 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.

    Keywords

    Sulfate pulping, Xylan, Bleaching, Enzymes, Color, Ultraviolet radiation, Nuclear magnetic resonance, Kappa reduction, Hexeneuronic acid

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