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Studies on the alkali extract from beech holocellulose

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Summary

The alkali extract (5% KOH) from beech holocellulose was fractionated by ion exchange chromatography, resulting in several fractions containing different amounts of polyoses and lignin. The separated polyoses varied to some extent in the ratios of their sugar components. Three different 4-0-methylglucurono-xylans and three arabinogalactans were isolated. There was a direct relationship between the chemical composition and the ultrastructure of the fractions. Those containing a pure 4-0-methylglucurono-xylan showed bundles of thin and stiff fibrils while in fractions with a high percentage of lignin coiled fibrils and globular particles could be observed in the electron microscope.

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Authors and Affiliations

  1. Institut für Holzforschung der Universität München, Winzererstr. 45, D 8000, München 40, Federal Republik of Germany

    Dietrich Fengel & Margarete Przyklenk

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  1. Dietrich Fengel
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  2. Margarete Przyklenk
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Additional information

Submitted by Arbeitsgemeinschaft Industrieller Forschungsvereinigungen (AIF) via Deutsche Gesellschaft für Holzforschung. The conscientious preparation of the electron microscopic specimens by Miss U. Schwarz is appreciated.

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Fengel, D., Przyklenk, M. Studies on the alkali extract from beech holocellulose. Wood Science and Technology 10, 311–320 (1976). https://doi.org/10.1007/BF00350834

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  • DOI: https://doi.org/10.1007/BF00350834

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