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Wood quality and strength relationships in Douglas-fir (Pseudotsuga mezieseii (Mirb.) Franco) wood of different maturity

Creator:: Carter, Keoki Apokolani
Abstract:: The objectives of this study were to determine: 1) differences in average wood quality and strength properties of clear-wood specimens sampled from juvenile, transition, and mature wood zones in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees from known forest sites; 2) relationships among wood quality properties [specific gravity (SG), rings per...
Resource Type:: Masters Thesis

Distribution of preservative chemicals in flakeboard and its effect on board properties and fungal deterioration

Creator:: Jeihooni, Asghar
Abstract:: Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] lumber was converted to flakes, which were dip treated with three concentrations each of copper chrome arsenate Type C (CCA-C), and disodium octaborate tetrahydrate (TIM-BOR). Azaconazole [1-[{2-(2,4-dichloropheny1)-1,3- dioxolan-2-yl}methyl]-1H-1,2,4-triazole] was used as powder. The flakeboard panels (305 x 304 x 13 mm) were made using phenolformaldehyde...
Resource Type:: Dissertation

Intra-ring variations in mature Douglas-fir trees from provenance plantations

Creator:: Abdel-Gadir, Abdelazim Yassin
Abstract:: The purpose of this study was to investigate variation in some intra-ring characteristics in juvenile and mature wood from two Douglas-fir genetic plantations established in 1912 by the U.S. Forest Service. The experimental material consisted of progeny from thirty families representing ten provenances (3 families per provenance) grown in two...
Resource Type:: Dissertation

Investigation of a new resin as an exterior adhesive to bond high moisture content veneers

Creator:: Clark, Randy Jon
Abstract:: A new carbohydrate-phenol based resorcinol resin (CPR resin) was synthesized by end capping a known carbohydrate-phenol based resole with resorcinol under basic reaction conditions. Synthetic parameters, such as duration of cook, pH, and the amount of resorcinol and formaldehyde were varied to produce resins with molecular weights (Mw) ranging from...
Resource Type:: Masters Thesis

Chemical characterization of breakdown products involved in detection of incipient decay of wood

Creator:: Holt, Kris E.
Abstract:: See pdf
Resource Type:: Masters Thesis

Detecting early decay and estimating residual strength of Douglas-fir heartwood by infrared and ultraviolet spectrophotometry

Creator:: Gibson, David G. (David Glenn), 1958-
Resource Type:: Masters Thesis
Full Text:: Ultraviolet Spectrophotometry Robert L. Krahmer Warm water extracts from small samples of non- decayed and

Microdistribution and retention of chloropicrin in wood

Creator:: Goodell, Barry Scott
Abstract:: Quantitative and qualitative information on the retention of chlorinated residues in chloropicrin treated wood is lacking. Retention of chloropicrin and its chemical breakdown products in wood, and the effects of chloropicrin treatment of wood on invading decay fungi are explored in this thesis. Chlorinated residues in amounts up to 1.5%...
Resource Type:: Dissertation
Full Text:: : Le-r-4 4 Robert L. Krahmer Redacted for Privacy and van der Waals forces are responsible, at

The relation of wood structure and strain energy release rate in fractured wood-glue composites

Creator:: Gibson, Mark Dariel
Resource Type:: Dissertation
Full Text:: : Robert L. Krahmer Comprehending the anatomical nature of wood and its role in the resultant fracture of

Evaluating radial compression, color indicator and micro-toughness tests to detect early decay in Douglas-fir

Creator:: Smith, Susan M.
Abstract:: Three methods--radial compression strength, color indicators of decay and micro-toughness, an examination of tracheid fracture patterns, were evaluated for detection of early decay and for application to field use. Three-eighth-inch diameter plugs 3/4-inch long, cut from the sapwood and heartwood of a Douglas-fir pole free of decay, were decayed by...
Resource Type:: Masters Thesis
Full Text:: -Fir R. D. Gya am R. L. Krahmer Three methods--radial compression strength, color indicators of

Fluorescence microscopy for detecting incipient decay and estimating residual strength of wood

Creator:: Lowell, Eini Carole
Abstract:: The objectives of this study were to 1) develop a relatively quick staining procedure that would detect incipient decay by color differentiation under fluorescence, 2) quantitatively assess the amount of decay present with the use of an image analyzer, and 3) re/ate loss in strength at various decay levels to...
Resource Type:: Masters Thesis
Full Text:: : Robert L. Krahmer The objectives of this study were to 1) develop a relatively quick staining procedure

ScholarsArchive@OSU

Wood quality and strength relationships in Douglas-fir (Pseudotsuga mezieseii (Mirb.) Franco) wood of different maturity

Distribution of preservative chemicals in flakeboard and its effect on board properties and fungal deterioration

Intra-ring variations in mature Douglas-fir trees from provenance plantations

Investigation of a new resin as an exterior adhesive to bond high moisture content veneers

Chemical characterization of breakdown products involved in detection of incipient decay of wood

Detecting early decay and estimating residual strength of Douglas-fir heartwood by infrared and ultraviolet spectrophotometry

Microdistribution and retention of chloropicrin in wood

The relation of wood structure and strain energy release rate in fractured wood-glue composites

Evaluating radial compression, color indicator and micro-toughness tests to detect early decay in Douglas-fir

Fluorescence microscopy for detecting incipient decay and estimating residual strength of wood

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