Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Christopher G. HuntSamuel L. ZelinkaCharles R. FrihartLinda LorenzDaniel Yelle; Sophie-Charlotte Gleber; Stefan Vogt; Joseph E. Jakes
    Date: 2018
    Source: International Biodeterioration & Biodegradation. 133: 230-237.
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    PDF: View PDF  (4.0 MB)

    Description

    The improved fungal decay resistance exhibited by modified wood has been attributed to inhibited diffusion of decay precursors and subsequent degradation products through the wood cell wall. However, data relating the effect of modification to diffusion through wood cell walls is lacking. Synchrotron X-ray fluorescence microscopy paired with an in situ humidity chamber was used to observe the transport of an implanted model metabolite, potassium (K+) ions, in wood cell walls as a function of relative humidity (RH) and extent of the wood modification acetylation. The RH threshold for K+ transport in wood cell walls increased with increasing levels of acetylation between 0 and 20 wt percentage gain (WPG), which clearly indicates that acetylation inhibits ion transport in the modified wood cell walls. The reduced equilibrium moisture content (EMCR or moisture based on wood polymer mass) thresholds were also calculated, but the trend of EMCR thresholds with WPG was inconclusive. Although the results provided support to the proposed mechanism that diffusion inhibition in acetylated wood caused decay resistance, the results could not confirm that diffusion inhibition was the most important mechanism. The observed inhibition of K+ transport in acetylated wood should motivate additional work to understand how chemical modifications affect cell wall diffusion and the implications for producing decay-resistant wood.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hunt, Christopher G.; Zelinka, Samuel L.; Frihart, Charles R.; Lorenz, Linda; Yelle, Daniel; Gleber, Sophie-Charlotte; Vogt, Stefan; Jakes, Joseph E. 2018. Acetylation increases relative humidity threshold for ion transport in wood cell walls – a means to understanding decay resistance. International Biodeterioration & Biodegradation. 133: 230-237.

    Cited

    Google Scholar

    Keywords

    Decay resistance, diffusion, x-ray fluorescence, humidity, acetylated wood, reduced equilibrium moisture content, wood modification

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/57337