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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

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:: extracted or heated control wafers. No detectable chlorine peak is present. Energy dispersive X-ray

Root initiation and elongation in Douglas-fir, Pseudotsuga menziesii (Mirb.) franco, stem cuttings as related to bud and cambial activity

Creator:: Bhella, Harbans Singh
Abstract:: The relation of bud and cambial activity to root initiation and elongation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings was studied through two successive growth cycles. Stem cuttings of current season's growth were taken periodically from field-grown Douglas-fir trees to determine: (1) origin and development of root initials; and...
Resource Type:: Dissertation
Full Text:: oriented root initials having no connection with the main vascular system. Continuous cell division

Habitat relationships of birds and young-growth Douglas-fir in northwestern California

Creator:: Marcot, Bruce G.
Abstract:: Ninety-one species of birds were surveyed in grass/forb, early and late shrub/sapling, pole, and medium sawtimber stages of young-growth Douglas-fir in northwestern California; patterns of bird distribution and abundance were related to habitat conditions and even-age silvicultural treatments. Seven species (band-tailed pigeon, western wood pewee, dusky flycatcher, western bluebird, fox...
Resource Type:: Dissertation
Full Text:: specialists showed no seasonal changes of distribution, or were more restricted in distribution during the

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:: about one micrometer wide with little or no flaring out at the outer surface to form a pit chamber

Forest structure and regeneration in the Tsuga heterophylla - Abies amabilis transition zone, central Western Cascades, Oregon

Creator:: Stewart, Glenn H.
Abstract:: The dynamics of stands in the mid-elevation old-growth Douglas-fir (Pseudotsuga menziesii) forests of the central western Oregon Cascade Range were investigated using stand structure analysis. Trees with different growth rates were commonly present in the same stand, which resulted often in a weak correlation between tree diameter and age. Thus,...
Resource Type:: Dissertation
Full Text:: the good work Falloons, Conners, and Morgans. No thank you would be complete without a mention of

Photosynthesis, respiration, and dry matter accumulation of Douglas-fir seedlings from different geographic sources and growth at different temperatures

Creator:: Sorensen, Frank C.
Resource Type:: Dissertation
Full Text:: . No matter which direction the plants were moved they behaved very much as If they had spent the

Postharvest water relations and needle abscission in cut trees of Douglas-fir (Pseudotsuga menziesii Mirb. Franco)

Creator:: Montano, Jose M.
Resource Type:: Dissertation
Full Text:: ABA's role in severe or prolonged water stress may be minimal, and Murphy (135) found no

Silvicultural impacts of sheep grazing in Oregon's Coast Range

Creator:: Leininger, Wayne C.
Abstract:: A three-year investigation was conducted during 1980-1982 to evaluate the potential of using herded sheep as a silvicultural tool to suppress brush in Douglas-fir (Pseudotsuga menziesii) plantations of Oregon's Coast Range. Sheep browsing of Douglas-fir was highest in May soon after bud break. Averaged over the 2 years of grazing,...
Resource Type:: Dissertation
Full Text:: accounts of grazing impacts on timber regeneration date back to the late 1800's, no comprehensive review

The chemical nature of the "lignin" of the bark of Douglas fir, Pseudotsuga menziesii (Mirb.) Franco

Creator:: Smith, James E. (James Edward)
Resource Type:: Dissertation
Full Text:: , easily removed by filtration on a Buchner funnel through No . 410 S & S filter paper . Attempts to wash

ScholarsArchive@OSU

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

Microdistribution and retention of chloropicrin in wood

Root initiation and elongation in Douglas-fir, Pseudotsuga menziesii (Mirb.) franco, stem cuttings as related to bud and cambial activity

Habitat relationships of birds and young-growth Douglas-fir in northwestern California

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

Forest structure and regeneration in the Tsuga heterophylla - Abies amabilis transition zone, central Western Cascades, Oregon

Photosynthesis, respiration, and dry matter accumulation of Douglas-fir seedlings from different geographic sources and growth at different temperatures

Postharvest water relations and needle abscission in cut trees of Douglas-fir (Pseudotsuga menziesii Mirb. Franco)

Silvicultural impacts of sheep grazing in Oregon's Coast Range

The chemical nature of the "lignin" of the bark of Douglas fir, Pseudotsuga menziesii (Mirb.) Franco

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