Index Catalog // ScholarsArchive@OSU

Natural and semi-synthetic compounds with biocidal activity against arthropods of public health importance

Creator:: Khasawneh, Mohammad A.
Abstract:: This study identified new compounds with pest control activities. The two sources of candidates that were followed here were the main heartwood extract of Alaska Yellow Cedar (AYC) constituents and several semi-synthetic counterparts. Five compounds were isolated and identified for the first time in AYC heartwood in this research: two...
Resource Type:: Dissertation
Full Text:: The author would like to express sincere appreciation to Prof. Joe J. Karchesy for his help, guidance

Environmental effects on heartwood extractive content and their consequences for natural durability in Douglas-fir and western redcedar

Creator:: Taylor, Adam McVaugh, 1969-
Abstract:: Heartwood can have properties that are distinct from sapwood, including resistance to insect and microbial attack. Despite the practical importance of heartwood formation in trees, a review of the literature revealed that little was known about the effects of environmental factors on heartwood quality or how variations in heartwood properties...
Resource Type:: Dissertation
Full Text:: members, Renée Brooks, Joe Karchesy and Claire Montgomery, for the guidance and support. This research

Improved interfacial adhesion in wood-plastic composites : Development of new compatibilizers

Creator:: Zhang, Cheng
Abstract:: In wood-plastic composites (WPCs) a compatibilizer is often used to improve the interfacial adhesion between the hydrophilic wood filler and the hydrophobic plastic matrix. At present, while the basic concepts of compatibilization are understood, the optimized chemical structures of an effective compatibilizer, including the ideal structures of the wood-binding domain...
Resource Type:: Dissertation
Full Text:: , Joe Karchesy and Dr. Skip Rochefort. I am grateful to my fellow graduate students and group members

New application of crystalline cellulose in rubber composites

Creator:: Bai, Wen
Abstract:: Rubber without reinforcement has limited applications. The strength of reinforced rubber composites can be ten times stronger than that of unreinforced rubbers. Therefore, rubber composites are widely used in various applications ranging from automobile tires to seals, valves, and gaskets because of their excellent mechanical elastic properties. Silica and carbon...
Resource Type:: Dissertation
Full Text:: . I would also like to extend my appreciation to my committee members, Dr. Everett Hansen, Dr, Joe

Wood quality studies in second-growth western redcedar (Thuja plicata Donn.)

Creator:: DeBell, Jeffrey D.
Abstract:: Western redcedar (Thuja plicata Donn.) is a valuable commercial species found in the northwestern United States and southwestern Canada. This dissertation includes four papers focused on wood and stem characteristics of second-growth western redcedar, and how those characteristics vary within the stem or how they are influenced by cultural practices....
Resource Type:: Dissertation

Investigation of new compatibilizer systems for wood-polyethylene composites

Creator:: Geng, Yu
Abstract:: Wood-plastic composites (WPCs) are one of the fastest-growing sectors of the wood composites industry. However, the strengths of WPCs are typically low because of the poor interfacial adhesion between hydrophilic wood and hydrophobic thermoplastics. A compatibilizer that can form bridges between wood and plastics is required to give WPCs desirable...
Resource Type:: Dissertation
Full Text:: , and my committee members, Dr. Joe Karchesy, Dr. Skip Rochefort, Dr. Mark Zabriskie, for their advice

Development and evaluation of novel coupling agents for kenaf-fiber-reinforced unsaturated polyester composites

Creator:: Ren, Xiaofeng
Abstract:: Natural fibers are gaining popularity as reinforcement materials for thermoset resins over the last two decades. Natural fibers are inexpensive, abundant, renewable and environmentally friendly. Kenaf fibers are one of the natural fibers that can potentially be used for reinforcing unsaturated polyester (UPE). As a polymer matrix, UPE enjoys a...
Resource Type:: Dissertation
Full Text:: for my whole lifetime. I would like to thank Dr. Joseph Karchesy, Dr. John Nairn, Dr. Willie E. Skip

Direct patterning of solution deposited metal oxides

Creator:: Stowers, Jason K.
Abstract:: Patterning of metal oxides typically involves a multi step process, involving depositing a resist, patterning that resist with some form of lithography, etching the oxide through the resist, and finally removing. This process can be simplified if the resist is removed and replaced with a metal oxide that can be...
Resource Type:: Dissertation

Phosphor development : synthesis, characterization, and chromatic control

Creator:: Li, Dong
Resource Type:: Dissertation
Full Text:: , Prof. Arthur Sleight, Prof. John Loeser, Prof. Michael Lerner, and Prof. Joe Karchesy for their

The epidemiology of sudden oak death in Oregon forests

Creator:: Peterson, Ebba K.
Abstract:: The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in't Veld), causal agent of Sudden Oak Death (SOD) of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus syn. Lithocarpus densiflorus), is established in coastal forests of the western United States. Since the discovery of SOD in the Douglas-fir / tanoak forests of...
Resource Type:: Dissertation
Full Text:: Laine, Mike Thompson, Mike McWilliams, Stacy Savona, Bill Woolsey, Joe Hubert and Justin Shaffer. I

ScholarsArchive@OSU

Natural and semi-synthetic compounds with biocidal activity against arthropods of public health importance

Environmental effects on heartwood extractive content and their consequences for natural durability in Douglas-fir and western redcedar

Improved interfacial adhesion in wood-plastic composites : Development of new compatibilizers

New application of crystalline cellulose in rubber composites

Wood quality studies in second-growth western redcedar (Thuja plicata Donn.)

Investigation of new compatibilizer systems for wood-polyethylene composites

Development and evaluation of novel coupling agents for kenaf-fiber-reinforced unsaturated polyester composites

Direct patterning of solution deposited metal oxides

Phosphor development : synthesis, characterization, and chromatic control

The epidemiology of sudden oak death in Oregon forests

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