Index Catalog // ScholarsArchive@OSU

Antioxidant activity of fractions from Quercus sideroxyla bark and identifi cation of proanthocyanidins by HPLC-DAD and HPLC-MS

Creator:: Rosales-Castro, Martha, Gonzalez-Laredo, Ruben Francisco, Rocha-Guzman, Nuria Elizabeth, Gallegos-Infante, Jose Alberto, Rivas-Arreola, Maria Jose, and Karchesy, Joseph J.
Abstract:: The most active phenolics in Quercus sideroxyla Humb. & Bonpl. residual bark were identified and evaluated following a chromatographic fractionation. Bark powder was defatted with hexane and crude extract (CE) was obtained by extraction with aqueous acetone (70%). A liquid partition with ethyl acetate was performed to produce an organic...
Resource Type:: Article
Full Text:: • Copyright © by Walter de Gruyter • Berlin • Boston. DOI 10.1515/hf-2011-0157 Antioxidant activity of

A numerical study of the transverse modulus of wood as a function of grain orientation and properties

Creator:: Nairn, John A.
Abstract:: Finite element analysis was used to study the effective transverse modulus of solid wood for all possible end-grain patterns. The calculations accounted for cylindrical anisotropy of wood within rectangular specimens and explicitly modeled wood as a composite of earlywood and latewood. The effective modulus was significantly reduced by growth ring...
Resource Type:: Article
Full Text:: • Copyright � by Walter de Gruyter • Berlin • New York. DOI 10.1515/HF.2007.079 Article in press

A new soy flour-polyepoxide adhesive system for making interior plywood

Creator:: Huang, Jian, Li, Chunhong, and Li, Kaichang
Abstract:: In this study, triglycidylamine (TGA) was synthesized and evaluated as a crosslinking agent for soy flour (SF) for making five-ply plywood from yellow poplar. Glycerol polyglycidyl ether (GPE) and trimethylolpropane triglycidyl ether (TTE) were also investigated as crosslinking agents for SF as adhesive for plywood. The plywood panels bonded with...
Resource Type:: Article
Full Text:: • Copyright © by Walter de Gruyter • Berlin • Boston. DOI 10.1515/HF.2011.169 A new soy fl our

Revisiting the neutral axis in wood beams

Creator:: Davis, Philip M., Gupta, Rakesh, and Sinha, Arijit
Abstract:: For wood beams, it is often assumed that the neutral axis (NA) is located at the centroid of the beam. This would be the case for isotropic and homogeneous materials but these prerequisites are not valid for wood. The varying grain patterns and knots located throughout wood make wood anisotropic...
Resource Type:: Article
Full Text:: • Copyright © by Walter de Gruyter • Berlin • Boston. DOI 10.1515/HF.2011.180 Revisiting the neutral

Effect of grain angle on shear strength of Douglas-fir wood

Creator:: Gupta, Rakesh and Sinha, Arijit
Abstract:: The effect of grain angle (GA) on shear strength of Douglas-fir has been evaluated. Shear block specimens with a GA varying from 0 to 90° was loaded in the shear plane, resulting in failure mode transitioning from parallel to grain shear to rolling shear. As expected, shear strength decreased as...
Resource Type:: Article
Full Text:: • Copyright © by Walter de Gruyter • Berlin • Boston. DOI 10.1515/hf-2011-0031 Short Note Effect of

Characterizing perpendicular-to-grain compression (C-perpendicular to) behavior in wood construction

Creator:: Basta, Craig Thomas, Gupta, Rakesh, Leichti, Robert J., and Sinha, Arijit
Abstract:: Current compression perpendicular-to-grain (C-perpendicular to) design values for wood members are based on mean stress obtained from ASTM D143 specimen. The standard ASTM test with metal on wood bearing has limited applicability in modern construction assemblies with C-perpendicular to loading scenarios. Previous work has shown that end-bearing conditions and wood-on-wood...
Resource Type:: Article
Full Text:: � by Walter de Gruyter • Berlin • Boston. DOI 10.1515/HF.2011.104 2010/233 Article in press

Influence of red alder on fertility of a forest soil: microbial and chemical effects

Creator:: Bollen, Walter Beno, 1896- and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: Soil Microbial and Chemical Effects By Walter B. Bollen Chi-Sin Chen Kuo C. Lu Robert F. Tarrant 1

Oregon State Forester ; Vol. 8, No. 1 (January 1955)

Creator:: OSC Oregon Forestry Alumni Association
Abstract:: Magazine of OSC Oregon Forestry Alumni Association.
Resource Type:: Other
Full Text:: happiness in th e world in his new posi t ion . Dean of Forestry WALTER F. McCULLOCH illac, as he is

Effect of competition on survival in western Oregon of the Douglas-fir beetle : Dendroctonus pseudotsugae Hopkins (Coleoptera: Scolytidae)

Creator:: Schmitz, Richard F., Rudinsky, J. A. (Julius Alexander), 1917-, and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: attention. Several investigators (Bedard, 1938; Johnson, 1960; Walters and McMullen, 1956) have com piled

Conifer response to three silvicultural treatments in the Oregon Coast Range foothills

Creator:: Walter, Scott T. and Maguire, Chris C.
Abstract:: This study assessed growth, condition, and mortality of residual trees one decade after harvest across three silvicultural treatments in thirty 85- to 125-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the Oregon Coast Range foothills. Group-selection cuts had 33% of the entire stand volume extracted as patches approximately 0.2–0.8 ha...
Resource Type:: Article
Full Text:: Coast Range foothills Scott T. Walter and Chris C. Maguire Abstract: This study assessed growth

ScholarsArchive@OSU

Antioxidant activity of fractions from Quercus sideroxyla bark and identifi cation of proanthocyanidins by HPLC-DAD and HPLC-MS

A numerical study of the transverse modulus of wood as a function of grain orientation and properties

A new soy flour-polyepoxide adhesive system for making interior plywood

Revisiting the neutral axis in wood beams

Effect of grain angle on shear strength of Douglas-fir wood

Characterizing perpendicular-to-grain compression (C-perpendicular to) behavior in wood construction

Influence of red alder on fertility of a forest soil: microbial and chemical effects

Oregon State Forester ; Vol. 8, No. 1 (January 1955)

Effect of competition on survival in western Oregon of the Douglas-fir beetle : Dendroctonus pseudotsugae Hopkins (Coleoptera: Scolytidae)

Conifer response to three silvicultural treatments in the Oregon Coast Range foothills

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