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Filtering by: Creator Hansen, Jeff E. Remove constraint Creator: Hansen, Jeff E. Advisor Morrell, Jeffrey J. Remove constraint Advisor: Morrell, Jeffrey J.

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  • Phytosanitation of Douglas-fir (Pseudotsuga menziesii) logs to mitigate the risk of artificially disseminating Phytophthora ramorum within the global trade of timber

    Creator:
    Hulbert, Joseph M.
    Abstract:
    Phytophthora ramorum is a plant pathogen that was accidentally introduced to the United States. This invasive microorganism has killed over a million trees in California and Oregon, and continues to spread to new areas. Diseased areas have been nationally quarantined to prevent further spread and more than ninety countries include...
    Resource Type:
    Masters Thesis
    Full Text:
    Everett M. Hansen Phytophthora ramorum is a plant pathogen that was accidentally introduced to the

  • 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:
    appreciation to the following individuals and organizations: CONACYT Dr. Jeff Morrell – Major advisor

  • The effects of tree position and silvicultural practices on treatability of Douglas-fir lumber

    Creator:
    Hong, Seungdo
    Abstract:
    In spite of the lack of accurate information about the treatability of western wood species with waterborne wood preservatives, consumption of these products continues to increase. Western wood species, notably Douglas-fir, are notoriously difficult to treat with waterborne systems, yet there is relatively little data on the effects of wood...
    Resource Type:
    Masters Thesis
    Full Text:
    , E. Hansen, P.E. Humphrey and C.J. Biermann. I belive that the God gave them great love, patience

  • Effects of best management practices on copper migration from Douglas-fir lumber treated with ACZA, CA or ACQ

    Creator:
    Ye, Min
    Abstract:
    Copper is the most common ingredient in waterborne preservatives and provides excellent activity against most fungi and insects. However, issues associated with copper migration from treated wood have created increasing concerns about potential risks to non-target organisms in surrounding environments, especially those in sensitive aquatic environments. Various Best Management Practices...
    Resource Type:
    Masters Thesis
    Full Text:
    sincerest gratitude to my advisor Dr. Jeff Morrell for his support and guidance throughout my M.S

  • Establishing a through-boring pattern and method of test for utility poles

    Creator:
    Elkins, Lori A.
    Abstract:
    The goal of this study was to optimize a through-boring pattern that will provide adequate preservative penetration while minimizing the reduction in overall pole bending strength. Hole spacing was developed using longitudinal and transverse chemical penetration data from previous studies. Finite element analysis was used as a preliminary assessment tool...
    Resource Type:
    Masters Thesis
    Full Text:
    . Kale Clauson who helped with testing. My major professors, Dr. Jeff Morrell and Dr. Bob Leichti, for

  • Effect of Hole Edge Distance on Strength of Through-Bored Utility Poles

    Creator:
    Romanaggi, Bennett T.
    Abstract:
    There are over 130 million wood poles supporting electrical transmission and distribution lines in the U.S. The vast majority of these poles are preservative treated to prolong their useful life. In some cases, however, the depth of treatment is relatively shallow, leaving a deep zone of moderately durable, untreated heartwood....
    Resource Type:
    Masters Thesis
    Full Text:
    the most. To my major professors, Arijit Sinha and Jeff Morrell. I would not be here today without

  • The phytosanitation of solid wood packaging materials using wood preservatives

    Creator:
    Schauwecker, Christoph F.
    Abstract:
    New species introductions have been associated with the movement of people for thousands of years. For instance, horses were introduced into North America by Spanish explorers, while pigs were introduced by the Polynesians into many Pacific islands long before the establishment of permanent European settlements. Both of these species introductions...
    Resource Type:
    Masters Thesis
    Full Text:
    the insect larvae are small and fungal damage may not be visible on the surface (Roll-Hansen and

  • 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:
    Scheffer (1973). Hansen and Morrell ( 1997), however, claimed that this estimate was conservative, and

  • Utilization of ground peanut husk as an alternative fiber material for particleboard

    Creator:
    Newton, Jacob A.
    Abstract:
    This research examined the potential for using peanut husk as a fiber alternative to wood in the production of melamine-formaldehyde (MF) particleboard. MF resin was used to produce panels with one, three, six, nine or 12 percent resin contents. Modulus of Rupture (MOR), Modulus of Elasticity (MOE), Internal Bond (IB)...
    Resource Type:
    Honors College Thesis
    Full Text:
    Corresponding e-mail address: newtojac@oregonstate.edu ©Copyright by Jacob

  • Potential utilization of western juniper residues

    Creator:
    Sichamba, Kennedy
    Abstract:
    Logging and forest thinning operations generate large amounts of residues in the form of small trees, branches and foliage that are usually left on the ground to decay or are burned. These resources are readily available, but it is uneconomical to remove them from the forest. The potential utilization of...
    Resource Type:
    Masters Thesis
    Full Text:
    ACKNOWLEDGEMENTS I owe my deepest gratitude to my co-supervisors, Drs Jeff Morrell and Scott Leavengood