Index Catalog // ScholarsArchive@OSU

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:: VARIABLES IN RELATION TO THEIR EFFECT ON TENSILE STRENGTH OF DOUGLA Abstract approved A microscopic study

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

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:: Retention of Chloropicrin in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco] Heartwood Quantitative and

The bleaching response of kraft pulps from fresh and aged commercial Douglas-fir chips

Creator:: Lai, Jinn-Hsing
Resource Type:: Masters Thesis

Anatomical and chemical characteristics of the Douglas-fir (Pseudotsuga menziesii (mirb.) Franko) phellem cell

Creator:: Litvay, John Dennis
Abstract:: The objectives of this study were to 1) characterize the layering in the wall of the Douglas-fir (Pseudotsuga. menziesii (Mirb. ) Franco) phellem cell, 2) determine the pitting present in this cell wall and 3) determine what compounds are present in the middle lamella of this cell. To accomplish the...
Resource Type:: Dissertation

Douglas-fir bark : water-soluble carbohydrates and alkaline degradation of a xylan

Creator:: Zerrudo, Jose Velmonte
Resource Type:: Dissertation

The influence of seed source origin and phenological characteristics on wood quality in a young Douglas-Fir Provenance Plantation

Creator:: Robinson, Walter P.
Abstract:: The relationships of several wood quality traits with seed origin and phenological characteristics, measured at a young age, were tested from six seed sources in a young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) provenance plantation. The wood quality traits measured were wood density, uniformity of wood density, percentage latewood, fiber length,...
Resource Type:: Masters Thesis

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 influence of environment, genetics and growth characteristics on tracheid length and specific gravity variation in a Douglas-fir provenance study

Creator:: Nicholas, Darrel Dean
Resource Type:: Masters Thesis

Douglas-fir bark : n-hexane-soluble and volatile materials

Creator:: Fang, Henry Hai-loong
Abstract:: Douglas-fir bark was extracted with n-hexane. A light-colored "wax-like" solid was recovered from the extract by evaporation of the solvent. Chemically intact sterol esters and ferulic acid esters were isolated from the "wax" without saponification or degradation as had been necessary in former investigations. The characterization of the intact esters...
Resource Type:: Dissertation

The flavonoid compounds of three floral phenotypes of Douglas fir

Creator:: Highley, Terry L.
Resource Type:: Masters Thesis
Full Text:: approved AN ABSTRACT OF THE THESIS OF PHENO ES OF DOUGLAS FIR r) This is the first study of the pigment

Interactions of ammoniacal copper zinc arsenate (ACZA) wood preservative with Douglas-fir

Creator:: Lebow, Stan T.
Abstract:: The use of the waterborne wood preservative, ammoniacal copper zinc arsenate (ACZA), is likely to increase in the near future because of environmental concerns associated with oilborne preservatives. Developing an understanding of the permanence of this preservative in wood will become important from both environmental and performance standpoints. Conventional thinking...
Resource Type:: Dissertation

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:: Properties of Douglas-fir Sapwood Polyphenol Oxidase Abstract approved:2'A Dr. Murray L. Laver structure is

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:: Thinning on Selected Strength and Pulping Properties of Douglas-fir Abstract approved: Dr. D. McKimmy

Ultrastructure of parenchyma and sclereids in Douglas-fir [Pseudotsuga menziesii(Mirb.)Franco] bark

Creator:: Dougal, Edward Francis
Abstract:: Because Douglas-fir [Pseudotsuga menziesii(Mirb.)Franco] bark is a raw material produced in our renewable forests along with wood, an understanding of the ultrastructure of bark cells is of paramount importance if wood technologists are to utilize the bark to the fullest potential. The objectives of this study were to develop microscopic...
Resource Type:: Dissertation
Full Text:: : Ultrastructure of Parenchyma and Sclereids in Douglas-fir [Pseudotsuga menziesii(Mirb.)Franco] Bark Robert L

Douglas-fir bark : n-hexane-soluble fraction

Creator:: Fang, Henry Hai-Loong
Abstract:: Douglas-fir bark was extracted with n-hexane yielding a light colored, "wax-like" solid as the n-hexane soluble fraction. The chemical constituents of this n-hexane soluble fraction were partially resolved by column chromatography using Silica Gel G as stationary phase and chloroform-n-hexane (3:1 v/v) as developing solvent. Several bands were observed under...
Resource Type:: Masters Thesis

Specific gravity and per cent summerwood variation in a young Douglas-fir clone and use of uniformity trial in predicting specific gravity from increment cores

Creator:: Strause, David Allen
Resource Type:: Masters Thesis

ScholarsArchive@OSU

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

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

Microdistribution and retention of chloropicrin in wood

The bleaching response of kraft pulps from fresh and aged commercial Douglas-fir chips

Anatomical and chemical characteristics of the Douglas-fir (Pseudotsuga menziesii (mirb.) Franko) phellem cell

Douglas-fir bark : water-soluble carbohydrates and alkaline degradation of a xylan

The influence of seed source origin and phenological characteristics on wood quality in a young Douglas-Fir Provenance Plantation

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

Determining moisture content and moisture sorption in Douglas-fir bark

Thermal characteristics of Douglas-fir bark fiber 25⁰ to 250⁰C

Douglas-fir bark : isolation and characterization of a holocellulose fraction

The influence of environment, genetics and growth characteristics on tracheid length and specific gravity variation in a Douglas-fir provenance study

Douglas-fir bark : n-hexane-soluble and volatile materials

The flavonoid compounds of three floral phenotypes of Douglas fir

Interactions of ammoniacal copper zinc arsenate (ACZA) wood preservative with Douglas-fir

Extraction and properties of Douglas-fir sapwood polyphenol oxidase

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

Ultrastructure of parenchyma and sclereids in Douglas-fir [Pseudotsuga menziesii(Mirb.)Franco] bark

Douglas-fir bark : n-hexane-soluble fraction

Specific gravity and per cent summerwood variation in a young Douglas-fir clone and use of uniformity trial in predicting specific gravity from increment cores

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