Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"southern yellow pine"”.
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Investigating Differences in Douglas-fir and Southern Yellow Pine Bonding Properties
Differences in southern yellow pine (represented by Pinus taeda) and Douglas-fir (Pseudotsuga menziesii) mature and juvenile wood were examined in terms of density, chemical composition, surface energy, shear stress, % wood failure, and delamination. Density was measured using a QTRS density …
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Mathematical model for control of high temperature drying of southern yellow pine dimension lumber
Although High temperature drying (HTD) of southern yellow pine (SYP) is extensively used, quality problems still exist. Approximately 25 percent of all green lumber (2 x 4, 2 x 6 and 2 x 8's) are degraded during HTD. Warp degrade, specifically "crook", is the main cause for the loss of quality of …
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Exploration of Wood DCB Specimens Using Southern Yellow Pine for Monotonic and Cyclic Loading
… Mode I fracture energy in wood adhesive bonds. Southern yellow pine (SYP) adherends were used with epoxy and phenol formaldehyde (PF) impregnated films, providing two systems with different characteristics for investigation. An adhesive penetration analysis was performed for both the epoxy and …
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Species Dependence of pMDI/Wood Adhesion
… to investigate differences in adhesion between southern yellow pine and yellow-poplar bonded with pMDI. Secondly, an improvement in the synthesis of 13C, 15N labeled pMDI is discussed. Mode I fracture results show that pMDI adhesion was affected differently by southern yellow pine compared …
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Catechyl-lignin tissues in Vanilla orchid and Candlenut: structure/property studies
… of vanilla seed coat and candlenut shell to Southern Yellow Pine wood diffractograms. The Southern Yellow Pine wood diffractogram corresponds to a typical native cellulose in higher plants, that is cellulose I allomorph. Diffractogram XRD analysis on vanilla seed coat and candlenut shell …
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Mechanism of Flake Drying and Its Correlation to Quality
… properties of wood flakes. Three species (southern yellow pine, sweetgum, and yellow-poplar) were tested. Experiments on flake drying and effect of flake properties (cutting direction and dimension) and an external factor (temperature) were used to evaluate the flake drying process. Drying …
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Trends in Forest Recovery After Stand-Replacing Disturbance: A Spatiotemporal Evaluation of Productivity in Southeastern Pine Forests
… assessed in this study using spectral metrics of southern yellow pine recovery following stand-replacing disturbance. An annual cloudfree (1984-2021) Landsat time series intersecting ten southeastern states was constructed using the Google Earth Engine API. Southern yellow pine stands were …
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Time-Based Manufacturing System Design for Softwood Lumber Production
… can achieve a sustainable competitive advantage. Southern yellow pine manufacturing is an example of an industry that can benefit from product lead time reduction. This project involved a case study of a southern yellow pine lumber manufacturer. Value stream mapping was used to evaluate the …
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The Effectiveness of Splicing Notched Pallet Stringer Segments With Metal Connector Plates
… is not effective. The species tested were oak, southern yellow pine, yellow-poplar, and two combined species - oak and yellow-poplar, and oak and southern yellow pine. The metal connector plates used were 3 x 4-inch, 3 x 6-inch truss plates, and a 3 x 4-inch plug plate. The splice methods tested …
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Effect of Cellulose Nanocrystals on the Rheology, Curing Behavior, and Fracture Performance of Phenol-Formaldehyde Resol Resin
… sandwich-type test specimens were prepared from southern yellow pine strips and the resin and CNC–resin mixtures. The mechanical properties of the test specimens were measured as a function of time and temperature by dynamic mechanical analysis (DMA). The time to incipient storage modulus …
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Assessment of Cross Laminated Timber Markets for Hardwood Lumber
… a log yield study of SGHL production from yellow poplar (YP) logs to produce 6'' and 8'' width SGHL to match the PRG 320 requirements. The fourth objective was to determine CLTs' production cost using SGHL and compared it with the CLTs manufactured from southern yellow pine (SYP). The …
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Tree Canopy Effects on Roof-Harvested Rainwater in East Texas
… collected from roofs under predominantly Southern yellow pine tree cover, and rainwater collected from roofs under predominantly hardwood tree cover. Rainwater was collected from these roofs for one year. The effects of canopy cover on water quality parameters, comparison to drinking water …
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Weathering of wood surfaces: characteristics, mechanisms, and prevention
Photodegradation of southern yellow pine, its mechanisms and means of prevention were studied. Changes in brightness and color were recognized when wood was exposed outdoors or to ultraviolet light. Scanning electron micrographs showed that most of the cell walls on irradiated transverse surface …
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Wood-based material use in the United States pallet and container industry
… board feet of lumber, cants, parts, and shook. Southern yellow pine consumption was an estimated 541 million board feet in 1991, followed closely by almost 500 million board feet of yellow-poplar, and over 227 million board feet of alder. Seventy percent of hardwood lumber and cant purchases (by …
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Penetration and permanence of an organophosphate and a pyrethroid in structural wood for insect control
… formulated as Dursban® TC (Dow Chemical Co.), in pine (Pinus spp.), spruce (Picea spp.), and fir (Abies spp.). Results indicated the highest degree of penetration in southern yellow pine. Surface roughness and orientation had an effect upon chemical penetration. Longevity studies ranging over time …
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Life history studies of the old house borer, Hylotrupes bajulus (L.) (Coleoptera: Cerambycidae)
… and was composed of ground host tissue (southern yellow pine, Pinus spp.), purified cellulose, agar, and basic nutrients. This diet provided an adequate physical and nutritional environment as noted in the reduction in larval mortality and developmental period when compared to …
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Relationship between Tooth Withdrawal Strength and Specific Gravity for Metal Plate Truss Connections
… tooth withdrawal and specific gravity for southern pine lumber and four different plate-to-wood load orientations, and b) to demonstrate how these relationships could be applied to new lumber grades to predict tooth withdrawal performance so that additional testing would not be necessary. …