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

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

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

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

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

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

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

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

ScholarsArchive@OSU

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

Poly(vinyl alcohol) / cellulose nanocomposite barrier films

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

Agroforestry farming in American Samoa : a classification and assessment

Cellulose reinforced high density polyethylene

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

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

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

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

Cellulose/polysulfone nanocomposites

Interfacial shear strength of wood-plastic composites

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

Improving the durability of second growth timbers of naturally durable species

Limiting copper loss from treated wood in or near aquatic environments

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

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