Index Catalog // ScholarsArchive@OSU

Analysis and comparison of essential oil components extracted from the heartwoods of Leyland cypress, Alaska yellow cedar, and Monterey cypress

Creator:: Liu, Xinfeng
Abstract:: The essential oil components of cedar heartwoods play an important role in the durability of these trees. Yet, the composition of these oils and identity of many of the compounds remains unknown, or incompletely know for some commercially important cedar heartwoods. The essential oil extracts of Alaska Yellow Cedar (Chamaecyparis...
Resource Type:: Masters Thesis
Full Text:: Monterey Cypress. Abstract approved: ___________________________ Joseph J. Karchesy

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

Development and evaluation of a new formaldehyde-free wood adhesive from renewable materials for making interior plywood

Creator:: Jang, Yonghwan
Abstract:: Synthetic adhesives, such as phenol-formaldehyde (PF) resins and urea-formaldehyde (UF) resins, have dominated the wood adhesive market since they were introduced in the wood products industry. Formaldehyde, as a key component in the manufacturing of PF and UF resins, has been classified as a known human carcinogen by the International...
Resource Type:: Masters Thesis
Full Text:: revising my thesis. I would like to sincerely thank Dr. Willie E. Skip Rochefort, Dr. Joe Karchesy, and

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

Agroforestry farming in American Samoa : a classification and assessment

Creator:: Tuitele-Lewis, Jeannette D.
Abstract:: Agroforestry is a traditional farming practice in American Samoa that has helped to sustain the livelihood of the native population for centuries. These once self-sufficient islands have become economically dependent on U.S monies and other external resources during the past century. Dependency has caused a shift in the carrying capacity...
Resource Type:: Masters Thesis
Full Text:: throughout my graduate studies as well as my committee members Hal Salwasser, Joe Karchesy, and Brent Steel

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

Reactive polyphenols and dissolved nutrients in a nitrogen-limited headwater catchment, western Cascades, Oregon, USA

Creator:: Rasmussen, Janet K.
Abstract:: In undisturbed N-limited forested catchments, DON may represent over 90% of the total N lost in streams. Some ecologists have suggested that plant-derived reactive polyphenols may be responsible for DON binding and transport because polyphenol-protein complexes are known to precipitate out of solution, bind to mineral surfaces or organic matter...
Resource Type:: Masters Thesis
Full Text:: . Joe Karchesy was always available for questions and supported my sometimes unconventional approaches

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

ScholarsArchive@OSU

Analysis and comparison of essential oil components extracted from the heartwoods of Leyland cypress, Alaska yellow cedar, and Monterey cypress

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

Development and evaluation of a new formaldehyde-free wood adhesive from renewable materials for making interior plywood

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

New application of crystalline cellulose in rubber composites

Agroforestry farming in American Samoa : a classification and assessment

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

Reactive polyphenols and dissolved nutrients in a nitrogen-limited headwater catchment, western Cascades, Oregon, USA

Investigation of new compatibilizer systems for wood-polyethylene composites

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