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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Comparison of chitosans with different molecular weights as possible wood preservatives

Journal of Wood Science volume 51, pages 387–394 (2005)Cite this article

Abstract

Fungi cause serious problems in wood utilization, and environmentally benign wood protection is required as an alternative to traditional chemicals. Chitosan has shown promising antimicrobial properties against several microorganisms. In this study, we present the characterization of and antifungal properties of a commercial chitosan formulation developed for impregnation of wood. A broad range of chemical and mycological methods were used to evaluate the uptake, fixation, and antifungal properties of chitosan for wood preservation. The results show that the higher the uptake of chitosan the lower the relative recovery of chitosan in wood after leaching, and the higher the molecular weight of chitosan the higher the recovery. Chitosan with high molecular weight proved to be more efficient against decay fungi than chitosan with low molecular weight. The fungi tested on chitosan-amended nutrient agar medium were totally inhibited at 1% (w/v) concentration. In decay studies using small wood blocks, 4.8% (w/v) chitosan concentration gave the best protection against brown rot fungi.

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Authors and Affiliations

  1. Norwegian Forest Research Institute, Høgskoleveien 12, N-1432 Ås, Norway

    Morten Eikenes, Gry Alfredsen & Halvor Solheim

  2. Department of Biotechnology, Norwegian University of Science and Technology, N-7491, Trondehim, Norway

    Bjørn Erik Christensen

  3. Institute of Wood Biology and Wood Technology, University of Göttingen, Büsgenweg 4, D-37077, Göttingen, Germany

    Holger Militz

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  1. Morten Eikenes
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  2. Gry Alfredsen
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  3. Bjørn Erik Christensen
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  4. Holger Militz
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  5. Halvor Solheim
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Correspondence to Morten Eikenes.

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Eikenes, M., Alfredsen, G., Christensen, B. et al. Comparison of chitosans with different molecular weights as possible wood preservatives. J Wood Sci 51, 387–394 (2005). https://doi.org/10.1007/s10086-004-0659-6

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  • DOI: https://doi.org/10.1007/s10086-004-0659-6

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