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    Author(s): Alex C. Wiedenhoeft
    Date: 2009
    Source: Third International Coating Wood and Wood Composites Conference : durable and sustainable--today and beyond: proceedings, September 22-23, 2009 ... Charlotte, NC. [Plymouth Meeting, PA] : NPCA/FSCT, 2009: [19] p.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.13 MB)

    Description

    Wood is a biological material, and its structure and organization are relicts of its biogenesis. From the hydrogen bonding of water molecules in the cell wall to extractives bleeding from knots in siding, the characteristics and behavior of wood are derived from its biological origin; this is my unashamedly biocentric view of wood structure. The structure of wood dictates that different material properties emerge and take primacy at different spatial and temporal scales, all determined by the tree that produced the wood and the ways the wood was processed. The appropriate wood structural, spatial, and temporal scales are rarely considered in experimental designs for either hypothesis or product testing. Studies that fail to account for these parameters are not necessarily wrong or useless, but they are less correct and have less utility than those that do account for them; they fail by virtue of lacking well‐reasoned null hypotheses. Intelligent experimental design requires appropriate selection of wood species, specimen size and shape, specimen environment, and duration of testing for the hypothesis or product being tested, in addition to a well‐reasoned null hypothesis. This paper reviews the fundaments of wood structure and wood technology in the context of the experimental scales at which they are relevant. It also discusses how to apply a biocentric mindset to the design of experiments involving wood involving durability and thus achieve efficient testing by means of an economy of scale.

    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

    Wiedenhoeft, Alex C. 2009. Biocentricity and economy of scale : hypothesis (and product) testing when wood is a part of an experimental system evaluating durability. In: Third International Coating Wood and Wood Composites Conference : durable and sustainable--today and beyond: proceedings, September 22-23, 2009 ... Charlotte, NC. [Plymouth Meeting, PA] : NPCA/FSCT, 2009: [19] p.

    Keywords

    Wood anatomy, wood chemistry, chemical composition, molecular structure, plant cell walls, softwoods, hardwoods, lignin, juvenile wood, sapwood, heartwood, wood utilization, wood products, hemicellulose, cellulose, tree-rings, coatings, testing, deterioration, experimental design, wood properties, product testing, durability, holocellulose, earlywood, latewood, wood technology

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https://www.fs.usda.gov/treesearch/pubs/39490