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Douglas-fir bark : characterization of a condensed tannin extract

Creator:: Song, Hong-keun
Resource Type:: Masters Thesis

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

Creator:: Chen, Chung-hsien
Resource Type:: Dissertation

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

Creator:: Zerrudo, Jose Velmonte
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

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

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 occurrence of abscisic acid in the dormant shoots of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Creator:: Webber, John Edinburgh
Abstract:: Methanolic extracts of the dormant Douglas-fir shoots (buds, leaves, and stems) were fractionated by solvent partitioning (sodium bicarbonate-diethyl ether). The acidic portion of the extract was subjected to column (Sephadex LH-2O, Silica Gel and Polyvinylpyrrolidone), preparative thick-layer and gas-liquid chromatography. Fractions collected from chromatographic separations were collected and tested for...
Resource Type:: Dissertation

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

Chemical suppression of a perennial ryegrass (Lolium perenne) living mulch and influence of ground cover management on growth of 'Chardonnay' wine grapes (Vitis vinifera) and Douglas fir Christmas trees (Pseudotsuga menziesii)

Creator:: Brenner, Loretta K.
Resource Type:: Masters Thesis
Full Text:: of a perennial rvegrass (Lolium perenne) living mulch and influence of ground cover management on

Time-dependent deflection of Douglas fir beams in bending and shear modes

Creator:: Capell, Harry Thomas
Abstract:: Creep in wood has been observed since 1833 but only recently has it been studied quantitatively. The aim of this paper is to study the time-dependent deflections of Douglas fir, Coast Region beams in bending and shear modes. The general method of approach used is that of large scale observation....
Resource Type:: Masters Thesis
Full Text:: and loaded at the quarter span points, thus, each beam had a section of pure bending moment and

ScholarsArchive@OSU

Douglas-fir bark : characterization of a condensed tannin extract

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

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

Extraction and properties of Douglas-fir sapwood polyphenol oxidase

Douglas-fir bark : n-hexane-soluble fraction

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

The occurrence of abscisic acid in the dormant shoots of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

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

Chemical suppression of a perennial ryegrass (Lolium perenne) living mulch and influence of ground cover management on growth of 'Chardonnay' wine grapes (Vitis vinifera) and Douglas fir Christmas trees (Pseudotsuga menziesii)

Time-dependent deflection of Douglas fir beams in bending and shear modes

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