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The application of fluorescence of pulping waste liquors to the control of laboratory and commercial pulping operations

Creator:: Wade, Dennis Clelan
Abstract:: Samples of Douglas-fir chips and western hemlock/true fir chips were pulped by the kraft and sulfite processes respectively. The spent liquors were analyzed for fluorescent response, and the fluorescent intensities of each liquor sample correlated with yields, Kappa numbers, and lignin contents of the pulps. Linear relationships were seen between...
Resource Type:: Masters Thesis
Full Text:: of MASTER OF SCIENCE 4';FOREST PRODUCTS presented on -7-4z /te": / 927 Title: THE APPLICATION OF

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:: joint effort by Oregon State University, the Oregon Forest Research Laboratory, and by Starker Forests

Log breakdown using dynamic programming and 3-D log shape

Creator:: Zeng, Yimin
Abstract:: A log breakdown model, SAW3D, was developed to optimize lumber recovery from logs of any shape in 3- dimensional space. The program uses a polygonal cross section representation of logs; three nested dynamic programming (DP) algorithms to optimize log breakdown, flitch and cant edging, and trimming operations; and a simple...
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
Full Text:: product (3). Thinning and fertilization of forest stands are likely to be tried much more in forest

Controlling biodeterioration of western wood species with over- the-counter wood preservatives

Creator:: Newbill, Mark A.
Abstract:: Over-the-counter (OTC) wood preservatives can provide wood with both a moisture barrier and fungicidal protection against biodeterioration, yet there is little comparative data on the performance of these preservatives. In this study, the potential of various low-toxicity, OTC preservatives was evaluated on five western wood species, western red cedar (Thuja...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Forest Products presented on April 20, 1993. Title: Controlling Biodeterioration

Fluorescence microscopy for detecting incipient decay and estimating residual strength of wood

Creator:: Lowell, Eini Carole
Abstract:: The objectives of this study were to 1) develop a relatively quick staining procedure that would detect incipient decay by color differentiation under fluorescence, 2) quantitatively assess the amount of decay present with the use of an image analyzer, and 3) re/ate loss in strength at various decay levels to...
Resource Type:: Masters Thesis
Full Text:: thanks go to Dr. Rodney C. DeGroot and Bessie Earthly at the Forest Products Laboratory in Madison

The effects of tree position and silvicultural practices on treatability of Douglas-fir lumber

Creator:: Hong, Seungdo
Abstract:: In spite of the lack of accurate information about the treatability of western wood species with waterborne wood preservatives, consumption of these products continues to increase. Western wood species, notably Douglas-fir, are notoriously difficult to treat with waterborne systems, yet there is relatively little data on the effects of wood...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Forest Products presented on December 9, 1993 Title: The Effects of Tree Position

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:: . 5See footnote 3. 6Research Associate, Forest Research Laboratory, Oregon State Univ. Photograph 6

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:: lathe-check depth were set by the Western Forest Products Laboratory of Vancouver, British Columbia

Life cycle assessment : environmental modeling of plywood and laminated veneer lumber manufacturing

Creator:: Ferrari, Charles J.
Resource Type:: Masters Thesis
Full Text:: materials (Figure 1 ). 3 Figure 1: LCA process for the structural wood products phase. Forest Use

ScholarsArchive@OSU

The application of fluorescence of pulping waste liquors to the control of laboratory and commercial pulping operations

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

Log breakdown using dynamic programming and 3-D log shape

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

Controlling biodeterioration of western wood species with over- the-counter wood preservatives

Fluorescence microscopy for detecting incipient decay and estimating residual strength of wood

The effects of tree position and silvicultural practices on treatability of Douglas-fir lumber

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

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

Life cycle assessment : environmental modeling of plywood and laminated veneer lumber manufacturing

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