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Pulping qualities of refractory vs. permeable douglas-fir heartwood

Creator:: Blackman, Gary Lee
Abstract:: Heartwood samples of Pacific Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii) and Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) were rated for relative liquid permeability, and evaluated for kraft pulping characteristics. Highly impermeable wood of the Rocky Mountain variety was termed "refractory," while the pervious wood of the Pacific Coastal variety...
Resource Type:: Masters Thesis

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:: FUTURE RESEARCH BIBLIOGRAPHY APPENDICES Appendix A Appendix B Appendix C Appendix D Appendix E

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

Creator:: Johnson, Donna A.
Abstract:: The purpose of this study was to determine if amount and kind of thinning had an effect on wood specific gravity, modulus of rupture, modulus of elasticity, growth rate, or pulp yield and kappa number. The study involved 24 1/5-acre plots, three plots in each of eight thinning treatments. The...
Resource Type:: Masters Thesis
Full Text:: receiving an income during the rotation of the stand (22, 24). Much research has been done on the effects

The economic feasibility of preheating Douglas-fir blocks prior to peeling

Creator:: Baskin, Richard
Abstract:: Past research and industrial sources have implied that preheating Douglas-fir Pseudotsuga menziesii (Mirb.) Franco prior to peeling veneer was economically feasible. To test this, the effect of treatment temperature on veneer yield and thickness variation for three diameter classes of low grade Douglas-fir logs was studied and related to the...
Resource Type:: Masters Thesis
Full Text:: Preheating Douglas-fir Blocks Prior to Peelin Abstract approved: Helmuth Resch Past research and

Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir

Creator:: Bodner, Josef
Abstract:: The purpose of this study was to determine if thinning, fertilization or a combination of thinning and fertilization had an effect on overall average specific gravity, modulus of elasticity, modulus of rupture, fiber length and intra-ring characteristics. Material for this experiment consisted of 7 trees randomly selected from each of...
Resource Type:: Masters Thesis
Full Text:: of this research. I would like to express special appreciation to my friend Johan Forrer

Extraction and properties of Douglas-fir sapwood polyphenol oxidase

Creator:: Musbah, Durria Abdel Azim
Abstract:: Chemical stains that develop on commercial woods are problems of great economic importance. The polyphenol oxidases catalyze the oxidation of the phenolics that naturally exist in plants to quinones when the cell structure is disrupted. The quinones produced are further oxidized and polymerized to melanin, the pigment which is responsible...
Resource Type:: Dissertation
Full Text:: , pulp and paper, plywood, furniture,and particleboard produced in the United States. One of the major

Effect of seedling characteristics on Kraft pulping properties of young Douglas-fir

Creator:: Chia, Shun Nan
Abstract:: A study has been made of the kraft pulping properties of young Douglas-fir trees which were thinned from an experimental plantation. The purpose of the plantation study is to determine, whether two year old seedlings can be selected on the criteria of height and branch count for future desirable tree...
Resource Type:: Masters Thesis

The flavonoid compounds of three floral phenotypes of Douglas fir

Creator:: Highley, Terry L.
Resource Type:: Masters Thesis
Full Text:: with methanol and one 1percént methanolic hydrochloric acid. Paper chromato- graphic and ultraviolet

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:: research but for his help in developing my teaching skills, and for his friendship. Thanks are also due to

A study of several anatomical variables in relation to their effect on tensile strength of Douglas-fir

Creator:: McMinimy, Lawrence Otto
Abstract:: A microscopic study was conducted on specific gravity wafers taken from standard tensile strength specimens of young growth Douglas-fir. Samples were studied to determine the effect of variables such as percent summerwood, fiber length and fibril angle on tensile strength of Douglas-fir. The sample specimens were picked so effects of...
Resource Type:: Masters Thesis
Full Text:: nature have been conducted on standard1 size Douglas-fir specimens. This research project was performed

ScholarsArchive@OSU

Pulping qualities of refractory vs. permeable douglas-fir heartwood

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

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

The economic feasibility of preheating Douglas-fir blocks prior to peeling

Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir

Extraction and properties of Douglas-fir sapwood polyphenol oxidase

Effect of seedling characteristics on Kraft pulping properties of young Douglas-fir

The flavonoid compounds of three floral phenotypes of Douglas fir

Microdistribution and retention of chloropicrin in wood

A study of several anatomical variables in relation to their effect on tensile strength of Douglas-fir

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