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

Poly(vinyl alcohol) / cellulose nanocomposite barrier films

Creator:: Paralikar, Shweta
Abstract:: There is a continual interest in developing robust, flexible, durable, lightweight, waterborne polymer barrier coatings which are increasingly resistant towards both chemical warfare agents as well as an ever growing number of toxic industrial chemicals. In this study, barrier films were prepared with poly(vinyl alcohol) (PVOH) and varying amounts of...
Resource Type:: Masters Thesis
Full Text:: . Joe Karchesy, Dr. Christine Kelly and Dr. David Cann for agreeing to serve on my committee and for

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

Cellulose reinforced high density polyethylene

Creator:: Palaniyandi, Velmurugan
Abstract:: High density polyethylene (HDPE) is a ubiquitous material with versatile properties. It is produced and used in greater volume than any other thermoplastic. HDPE is often filled with a variety of materials for various applications. Glass fiber and wood flour are two common fillers for HDPE. Recently there has been...
Resource Type:: Masters Thesis

Nutrient and tannin concentrations of shrub leaves in managed and unmanaged forests of the Oregon Coast Range : implications for herbivores

Creator:: Lange, Karen M.
Abstract:: Many herbivores of the Pacific Northwest rely on forest understory shrub leaves for a source of nitrogen, energy, and moisture. I measured nitrogen, protein-binding capacity, and condensed tannin concentration as indicators of available nitrogen; cell wall constituents and lignin as indicators of available energy; and moisture concentration in young and...
Resource Type:: Masters Thesis

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

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

Development and characterization of new formaldehyde-free soy flour-based adhesives for making interior plywood

Creator:: Huang, Jian
Abstract:: Formaldehyde-based adhesives such as urea-formaldehyde (UF) and phenol-formaldehyde (PF) adhesives dominate the current wood adhesive market. However, these adhesives are derived from petrochemicals and carcinogenic formaldehyde. In this study, we developed two formaldehyde-free adhesives based on abundant, renewable, and inexpensive soy flour (SF). The first adhesive was mainly composed of...
Resource Type:: Masters Thesis
Full Text:: will definitely be beneficial to my future work and life. I would like to thank Dr. Joe Karchesy

Influence of diagonal cracks on negative moment flexural anchorage performance in reinforced concrete bridge girders

Creator:: Goodall, Joshua K.
Abstract:: Large numbers of vintage reinforced concrete deck-girder bridges remain in the national bridge inventory. Many of these exhibit diagonal cracking and other distress. Due to the design practices of the time, it is common to observe cracks at locations where flexural reinforcing steel is terminated along the span. The presence...
Resource Type:: Masters Thesis
Full Text:: members Dr. Tom Miller, Dr. Michael Scott, and Dr. Joe Karchesy. Their input into the thesis writing

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

Cellulose/polysulfone nanocomposites

Creator:: Noorani, Sweda
Abstract:: Microchannel devices are rapidly evolving process technology with a wide variety of applications. Microchannel devices hold the potential to transform many separation processes. One potential application for such microchannel devices is kidney dialysis. By reducing the size and cost of the device, this technology offers the potential to allow dialysis...
Resource Type:: Masters Thesis
Full Text:: Joe Karchesy : I would like to thank Dr Skip and Dr Karchesy for agreeing to serve on my academic

Interfacial shear strength of wood-plastic composites

Creator:: Rogers, James F.
Abstract:: This study examined the relationship of interfacial shear strength (IFSS) and bending strength (MOR) of several different wood-plastic composites (WPC's). Plastics utilized were high-density polyethylene (HDPE) and polypropylene (PP). Pine and oak were used as the wood species. Compatibilizers used included maleicanhydride polyethylene (MAPE), polymeric methylene diphenyl diisocyanate (PMDI), KymeneTM,...
Resource Type:: Masters Thesis
Full Text:: goals would be finished. Professors Skip Rochefort and Joe Karchesy also are due many thanks for being

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

Non-conventional feedstuffs in rabbits and poultry nutrition : utilization and effects of feed processing methods

Creator:: Tor-agbidye, Yakubu
Resource Type:: Dissertation

Cocondensation products of molybdenum trioxide with water, carbon disulfide, and various small organic molecules

Creator:: McAfee, Lyle Vernon
Resource Type:: Dissertation
Full Text:: gravimetric analysis and X-ray powder diffraction analysis, Joe Karchesy for assistance with the GPC and

Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam.

Creator:: Brodhagen, Marion L.
Abstract:: Spotted knapweed, Centaurea maculosa Lam. (Compositae) is an extremely successful introduced weed species in the northwestern United States. Multiple factors may be responsible for its success, including chemical defense. Two different types of putative chemical defense agents are the focus of this thesis. The first is a bitter-tasting sesquiterpene lactone,...
Resource Type:: Masters Thesis
Full Text:: products chemistry in the commercial world. Thanks to Yvette and Joe Karchesy for letting me invade their

Improving the durability of second growth timbers of naturally durable species

Creator:: Cabrera Orozco, Yohanna
Abstract:: While the heartwood of many wood species exhibits excellent resistance to fungal and insect attack, this resistance is sometimes diminished in second-growth material of the same species. The reasons for the reduced durability are unclear, but they may reflect a combination of both higher proportions of sapwood as well as...
Resource Type:: Masters Thesis
Full Text:: , including: Joe Karchesy, Sheeba Veluthoor, and Xienfeng Liu, who helped me with wood extraction; Mathew

Limiting copper loss from treated wood in or near aquatic environments

Creator:: Mitsuhashi Gonzalez, June M.
Abstract:: Copper migration from treated wood has created concerns within the environmental community because of the potential effects of this heavy metal on aquatic organisms. Migration can be limited, to some extent, by more controlled treatments and by post-treatment processing, but these actions cannot completely overcome the problem. An alternative approach...
Resource Type:: Masters Thesis

Computer modeling of network flexibility and materials with negative thermal expansion

Creator:: Khosrovani, Nazy
Resource Type:: Dissertation
Full Text:: De Kock, Dr. James Krueger, and Dr. Joe Karchesy for all their help, and I would especially like to

An analysis of water resource conflict and cooperation in Oregon between 1990 and 2004

Creator:: Fesler, Kristel J.
Abstract:: This research provides details of water resource conflict and cooperation in Oregon between 1990 and 2004 by using an event database methodology. Events were concentrated in four of 18 basins. No basin accounted for more that 25% of the total water rights events, the most evenly distributed issue type. Overall...
Resource Type:: Masters Thesis
Full Text:: people that have made this journey so delightful. Thanks to Margaret and Joe Karchesy for giving me a

Molecular factors that influence host range and virulence of A. tumefaciens

Creator:: Castle, Linda A.
Abstract:: Agrobacterium tumefaciens is a common soil bacterium that causes crown gall disease on many dicotyledonous plant species. It has been exploited for use in genetic engineering because it is able to promote transfer of any DNA segment to plant chromosomes. Many molecular factors in both the plant and bacterium contribute...
Resource Type:: Dissertation
Full Text:: . Joe Forrester for sequence analysis, Dr. Billy Cumbie for plant anatomy lessons, Dr. James Baggett for

Relationships between endogenous phenolic compounds of rhododendron tissues and organs and cold hardiness development

Creator:: Chalker-Scott, Linda
Abstract:: The leaching of water soluble phenolic compounds from cold stressed Rhododendron leaves was found to be a reliable indicator of tissue damage. In sublethally stressed leaf tissues, more and novel phenolic compounds appeared and were hypothesized to be precursors of cell wall components such as lignin and suberin. Subsequent radiolabeling...
Resource Type:: Dissertation
Full Text:: especially to Joe Karchesy for use of his laboratory facilities and for my current research

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