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Filtering by: Academic Affiliation Forest Products Remove constraint Academic Affiliation: Forest Products Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis Subject Douglas fir Remove constraint Subject: Douglas fir

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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
The flavonoid compounds of three floral phenotypes of Douglas fir

Creator:

Highley, Terry L.

Resource Type:

Masters Thesis
The effects of supercritical CO₂ on the bending properties and treatment defects of four refractory wood species

Creator:

Anderson, Matthew E.

Abstract:

It is difficult to treat the heartwood of many wood species with liquid preservatives using conventional liquid processes. Supercritical fluids (SCF) used as carriers of preservatives to impregnate refractory wood species may be an attractive alternative to conventional liquid carriers. While SCF impregnation has many potential advantages, some wood species...

Resource Type:

Masters Thesis
Comparative test methods for evaluating shear strength of structural lumber

Creator:

Riyanto, Djoko S.

Abstract:

Five different test methods to determine the parallel-to-grain shear strength of Douglas-fir structural lumber were compared. Four methods assessed the shear strength of lumber sections having a full nominal two by four inch cross-section. These were: three-point bending, four-point bending, five-point bending, and torsion. The fifth method was the ASTM...

Resource Type:

Masters Thesis
Fungitoxicities of NaMDC decomposition products to decay fungi colonizing Doulgas-fir and ponderosa pine wood

Creator:

Canessa, Edwin

Abstract:

Metham sodium or NaMDC is one of the four major soil fumigants that are currently registered for controlling internal decay of wood products in use. Fumigants are used primarily in utility poles but are also applied to piling, timbers and other large wood members. NaMDC must decompose to fungitoxic compounds...

Resource Type:

Masters Thesis
Image pre-processing algorithms for isolation of defects in Douglas-fir veneer

Creator:

Forrer, Johannes Barry

Abstract:

The goal of this research is to develop automatic techniques for identifying defects in Douglas-fir veneer. To achieve this goal, computer vision techniques, in particular image-processing, will be applied. Several pre-processing steps may be required to enhance images in making further analysis easier, faster, and more reliable. Pre-processing is often...

Resource Type:

Masters Thesis
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
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
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
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

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Academic Affiliation

Forest Products[remove]20

Advisor

Mckimmy, M. D.5
Bublitz, Walter J.3
Laver, Murray L.2
Morrell, Jeffrey J.2
Aft, Harvey1
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1959 to 1999

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Committee Member

Brodie, Douglas1
Brown, T.1
Brunner, Charles1
Ching, K. K.1
Davis, J.1
more Committee Members »

Creator

Anderson, Matthew E.1
Baskin, Richard1
Blackman, Gary Lee1
Bodner, Josef1
Canessa, Edwin1
more Creators »

Date

Date range begin – Date range end

Current results range from 1959 to 1998

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Decade

1990-19993
1980-19897
1970-19795
1960-19694
1950-19591

Degree Field

Forest Products20

Degree Level

Master's20

Degree Name

Master of Science (M.S.)20

Language

English [eng]20

Non-Academic Affiliation

Oregon State University. Graduate School20

Peer Reviewed

No15

Resource Type

Masters Thesis[remove]20

Rights Statement

Copyright Not Evaluated20

Subject

Douglas fir[remove]20
Forest thinning2
Veneers and veneering2
Bark1
Bark -- Utilization1
more Subjects »

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