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Filtering by: Creator Scheffer, Theodore C. Remove constraint Creator: Scheffer, Theodore C. Advisor Morrell, Jeffrey J. Remove constraint Advisor: Morrell, Jeffrey J.

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  • Application of Infrared Spectroscopy for Determination of Wood Natural Durability

    Creator:
    Lipeh, Shahlinney
    Abstract:
    Natural durability remains one of the most attractive characteristics of wood, and helps wood obtain a premium price. A worldwide shift towards the use of younger trees from intensively managed forests has created greater concerns about wood quality, especially the wood’s resistance to fungi and insects. Wood durability is assessed...
    Resource Type:
    Dissertation
    Full Text:
    guiding me in every step of my writing process.  Committee members Dr. Darrell W. Ross, Dr. Seri C

  • Modeling changes in flexural properties of softwood beams during fungal decomposition

    Creator:
    Mitsuhashi Gonzalez, June M.
    Abstract:
    Moisture intrusion in residential structures can lead to substantial fungal decay and this damage costs billions in repair/replacement costs. The extent of damage and the rate at which it occurs are primarily dependent on the wood moisture content and temperature in the structure. Determining the risk of decay for various...
    Resource Type:
    Dissertation
    Full Text:
    . ............................................................................ 7 c) White-rot fungi

  • The Effect of Sill Height on Decay in Air-Seasoning Crossties

    Creator:
    Rogers, Leon R.
    Abstract:
    The sustainable use of wood for rail ties requires chemical treatment to increase service life and maintain structural integrity. Treatment can only be applied after lengthy air-seasoning to reduce moisture content in wood, but seasoning leaves ties exposed to attack by decay fungi for up to a year. One factor...
    Resource Type:
    Masters Thesis
    Full Text:
    , Berlin. Meyer, L., Brischke, C. & Preston, A. (2016) Testing the durability of timber above ground: A

  • Environmental effects on heartwood extractive content and their consequences for natural durability in Douglas-fir and western redcedar

    Creator:
    Taylor, Adam McVaugh, 1969-
    Abstract:
    Heartwood can have properties that are distinct from sapwood, including resistance to insect and microbial attack. Despite the practical importance of heartwood formation in trees, a review of the literature revealed that little was known about the effects of environmental factors on heartwood quality or how variations in heartwood properties...
    Resource Type:
    Dissertation
    Full Text:
    techniques. This review builds upon the reviews of Scheffer and Cowling (1966), Bamber and Fukazawa (1985

  • The effects of supercritical CO₂ on the bending properties and treatment defects of four refractory wood species

    Creator:
    Anderson, Matthew E.
    Abstract:
    It is difficult to treat the heartwood of many wood species with liquid preservatives using conventional liquid processes. Supercritical fluids (SCF) used as carriers of preservatives to impregnate refractory wood species may be an attractive alternative to conventional liquid carriers. While SCF impregnation has many potential advantages, some wood species...
    Resource Type:
    Masters Thesis
    Full Text:
    temperature (60 °C) and one treatment time (30 min.). SCF treatment of yellow poplar produced no significant

  • Controlling biodeterioration of western wood species with over- the-counter wood preservatives

    Creator:
    Newbill, Mark A.
    Abstract:
    Over-the-counter (OTC) wood preservatives can provide wood with both a moisture barrier and fungicidal protection against biodeterioration, yet there is little comparative data on the performance of these preservatives. In this study, the potential of various low-toxicity, OTC preservatives was evaluated on five western wood species, western red cedar (Thuja...
    Resource Type:
    Masters Thesis
    Full Text:
    hemlock, Douglas-fir (heart), western redcedar or redwood stakes dip or brush-treated with TBTO/Folpet-C

  • Fungal colonization of Douglas-fir sapwood

    Creator:
    Kang, Sung-Mo
    Abstract:
    The fungi that cause mold and stain of freshly sawn lumber result in millions of dollars in losses to the forest products industry. Stain and mold are typically prevented by either kiln drying or by application of a topical fungicide. While these treatments are effective, kiln drying is costly and...
    Resource Type:
    Masters Thesis
    Full Text:
    . In the forest, 0. ulmi and C. fagacearum cause Dutch-elm disease and oak wilt, respectively

  • Characterization of Fungal Communities in Selected Wood Species by Field Exposure Tests

    Creator:
    Torres-Andrade, Paola A.
    Abstract:
    Fungi are the primary biological agents of wood deterioration and cause major economic losses of wood products globally. Wood in outdoor applications tends to remain wet for extended time periods, making it susceptible to fungal attack. Understanding the factors involved in fungal colonization of wood is important for developing improved...
    Resource Type:
    Dissertation
    Full Text:
    . Environmental gradients were: average monthly precipitation (mm), average monthly temperature (°C) and average

  • Wood treatment by double-diffusion using copper sulfate and sodium fluoride

    Creator:
    Pavia-Jones, K. Josephine
    Abstract:
    In investigating wood treatment as a possible processing option for Alaska forest products manufacturers, the double-diffusion method using sodium fluoride followed by a copper sulfate appeared to be the most advantageous approach. Yet, little information was available as to the chemical retention after treating and its resistance to leaching. Green...
    Resource Type:
    Masters Thesis
    Full Text:
    typical of Southeast Alaska and the low decay risk for use in the interior region (Scheffer 1971, Hunt

  • Development of an Accelerated Method for Assessing Decay of Wood Plastic Composites (WPC's)

    Creator:
    Silva Guzman, Jose Antonio
    Abstract:
    This study examined the decay resistance of the pine and maple components of wood plastic composites (WPC' s) of varying thicknesses exposed on several culture media to wood decay fungi under laboratory conditions. The ability of malt agar extract (MEA), potato dextrose agar (PDA), amended basal salts, sawdust (maple and...
    Resource Type:
    Dissertation
    Full Text:
    dissertation. Thanks also to Dr. Thomas McLain for his support. I want to express my thanks to M. C. Camile