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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:: stand sites in Oregon or 4 stand sites in Washington. Bars with p>0.05 are not significantly different

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:: , and those specimens exposed to Gloeophyllum trabeum and P. placenta on MEA reached higher moisture

Performance of copper based biocides in potentially copper tolerant soils

Creator:: Chang, Andrew B.
Abstract:: Copper is an excellent biocide which has a long history of usage for protecting wood from deterioration, but some organisms have developed tolerance for this chemical. Copper tolerance among wood decay fungi is a poorly understood phenomenon that is gaining importance as cofactors such as arsenic and chromium are removed...
Resource Type:: Masters Thesis
Full Text:: percent means for a maximum of 12 months in an Oregon soil 45 4.5 P-values for comparisons of strength

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:: hemlock and southern pine beams inoculated with one of three fungi (G. trabeum, P. placenta

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:: attributed to termites and decay fungi (Clausen and Yang, 2007; Ghaly and Edwards, 2011; Nicholas, 1982

Groundwater and stormwater treatment at western wood preserving facilities : an analysis of current treatment methods

Creator:: Ragan, Anita M.
Abstract:: The Pacific Northwest is blessed with an abundance of precipitation. This rainfall, however, can have important consequences for industries that must process the resulting stormwater for proper discharge. This is particularly true of wood treatment facilities. Past management practices at wood preserving facilities located in the Western United States create...
Resource Type:: Masters Thesis
Full Text:: the US (Nicholas, 1973). Wood treatment introduces pesticides into the structure of the wood

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

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:: Figure 4.1. Weight losses (%) of oil -treated wood blocks exposed to P. placenta in an agar block decay

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:: converted into heartwood substance" (IAWA 1964, p. 32). In some species, heartwood may be distinguished

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:: 17. Degree of discoloration ofDouglas-fir sapwood wafers exposed to one of 4 strains of P

ScholarsArchive@OSU

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

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

Performance of copper based biocides in potentially copper tolerant soils

Modeling changes in flexural properties of softwood beams during fungal decomposition

Application of Infrared Spectroscopy for Determination of Wood Natural Durability

Groundwater and stormwater treatment at western wood preserving facilities : an analysis of current treatment methods

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

Potential utilization of western juniper residues

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

Fungal colonization of Douglas-fir sapwood

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