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 15 of 15 for “"Wood sciences"”.
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In situ determination of strength and stiffness of structural lumber and composite products
Wood is prone to deterioration that reduces its load bearing capabilities. Periodically, older wooden members need to be inspected to ensure the strength and stability of the structure. Historically these inspection methods have consisted of visual inspections lacking scientific …
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Preservative treatment evaluation of five Appalachian wood species with four preservatives
Hardwoods have been used extensively throughout the years for many uses. In the last century, wood railway tie and bridge material has been treated almost exclusively with the preservative creosote in order to improve durability. This has led to the knowledge that hardwoods treated with creosote …
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Microbial ecology of freshly sawn yellow-poplar lumber ( Liriodendron tulipifera L.) in two seasons
Each year, the forest products industry sustains considerable product loss due to a reduction in market value of lumber brought about by microbial discoloration. The current practice of treating green lumber with chemical biocides to protect it from discoloration, although successful, is a …
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Study of West Virginia wood industry roundwood consumption in 1999
Use of wood composite products has increased over the last decade in the market for construction material. Softwood species and soft hardwood species are the preferred forest resources for manufacturing these products. Reduction in available softwood forest resources from the Western states has …
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Energy Intensity Determination in Wood Processing Sawmills
Energy intensity is an important aspect to wood products producing sawmills in the State of West Virginia. This research aims to facilitate the accurate measurement of electrical energy intensity in sawmills by means of energy analysis and diagnostics using various data acquisition devices on …
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Using bio-chars as potential catalysts for upgrading wood pyrolysis vapors
… aims at understanding decomposition behavior of wood components, its chemical constituent polymers and using moderate catalysts, like bio-chars.;Thermo-chemical decomposition behavior for wood components (bark, sapwood and heartwood) and individual wood-polymers (cellulose, hemicellulose and …
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Co-gasification of coal and biomass
… and sulfur content significantly decreased when wood was mixed with coal. It was found that the reduction reactions for the gasification of char formed started at 800°C.Moreover, mixtures of hardwood pellets and bituminous coal (Pittsburgh seam) were gasified in a down-draft fixed bed …
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Fastener withdrawal resistance of wood-based composite panel products
… evaluate the performance of currently available wood-based panel products as sub-floor materials when used under quality oak strip flooring and exposed to cyclic EMC conditions. The critical evaluation criterion was the fastener holding capacity of various sub-floor materials. To accomplish this, …
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Pretreatment and enzymatic hydrolysis of lignocellulosic materials
… for this study, namely, yellow poplar (hardwood) and corn cob (herbaceous crop).;A combination of reactor incline and shaking speed of 46.7°/180 rpm produced continuous and steady transportation of insoluble substrates through the hollow fibers of polymeric TMR, when no cellulolytic …
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Detection of subsurface anomalies in fiber-reinforced polymer (FRP) wrapped timber bridge components using infrared thermography
This thesis presents the results of an experimental study on the use of Infrared Thermography technique for detection of subsurface anomalies in fiber reinforced polymer (FRP) wrapped timber bridge components. An extensive literature review on the application of various nondestructive evaluation …
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Durability and mode-I fracture of fiber-reinforced plastic (FRP)/wood interface bond
… composites are being used for reinforcement of wood, concrete, and steel. The objective of this study is to develop a qualification program to evaluate the service performance and fracture of composite/wood bonded interfaces. The proposed method is used for two types of FRP wood interface: FRP …
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Simulation based modeling of the elastic properties of structural wood based composite lumber
The importance of wood-based composite lumber is increasing in the US market for construction materials. Manufacturers of such composites strive to make their products more competitive by increasing their value. This dissertation describes the development of simulation models that can aid these …
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Energy analysis and diagnostics in wood manufacturing industry
… if more energy analysis and research is done in wood manufactring (SIC 24). This thesis and research work is concerned with the energy analysis and diagnostics in wood manufacturing industry in West Virginia. This work involves actually conducting site assessments at several lumber and wood …
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Characterizing the chemistry of yellow-poplar surfaces exposed to different surface energy environments using DCA, DSC, and XPS
… and/or functional groups. Above the Tg, the wood with aluminum treatment is greater in surface energy than the control and other surface treatments. The surface energy obtained from teflon treatment, at temperatures above the Tg, was lower than heat/air treatment. There was less preferential …
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Analytical Evaluations of Buckling Behavior of Wood Composite I-Joist with Sinusoidal Web
… buckling is an important limit state for wood composite I-joist because the in-plane bending stiffness is typically greater than torsional lateral bending stiffness. Web local buckling is another important limit state because of the thin-walled web configuration. To increase the buckling …