Index Catalog // ScholarsArchive@OSU

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Creator:: Boyko, Alayne Linda
Abstract:: Flavor profiles of canned and frozen whole kernel sweet corn were obtained by entraining the volatile compounds on Porapak 0 traps and by subsequent analysis on temperature-programed, 500' by 0.03" ID capillary columns (SF-96 or Carbowax 20M). Identification was based on GC/MS data, retention indices (I[subscript E]'s) and retention times....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE iHLSIS OF ALAYNE LINDA BOYKO for the degree

Context matters : A multi-scale assessment of riparian tree response to upslope density reduction

Creator:: Ruzicka, Kenneth J., 1982-
Abstract:: Forest management is rapidly undergoing a transformation from a discipline based on efficient commodity production to one for multiple uses, especially on federally managed land in the United States. This new management paradigm has challenged silviculturists to develop and adapt forest management techniques that can deal with increased demands. Using...
Resource Type:: Dissertation
Full Text:: Interior, US Geological Survey. Cumming, G., P. Olsson, F. S. Chapin, III, and C. S. Holling. 2013

The Effects of Host and Pathogen Variation on Infection Dynamics in the Amphibian-Chytrid System

Creator:: Dang, Trang D.
Abstract:: This dissertation uses manipulative experiments to explore amphibian-Bd infection dynamics. Although there has been almost two decades research since the discovery of Bd, many questions still remain regarding what conditions mediate chytridiomycosis virulence. My research shows how certain host and pathogen factors can influence disease virulence. Identifying how host and...
Resource Type:: Dissertation
Full Text:: Table B1 Initial mass (g) and SVL (mm) of donor hosts exposed to Bd ...................134 Table B2

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Creator:: Chestnut, Tara
Abstract:: Biodiversity losses in terrestrial, freshwater, and marine systems are accelerating at a global scale and the most threatened vertebrate taxa are those associated with freshwater habitats. The causes of biodiversity losses are often complex and include synergistic effects of natural and human-induced stressors, such as habitat loss and fragmentation, urbanization,...
Resource Type:: Dissertation
Full Text:: occurrence (Olson and Ronnenberg 2014). 4 To understand the pathology and conservation

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

Creator:: Urbina Gonzalez, Jenny Cecilia
Abstract:: This dissertation presents a different approach to understanding how amphibians are responding to disease through ontogeny. Although numerous efforts have been conducted to understand host responses to the fungus Batrachochytrium dendrobatidis (Bd), studies have been restricted to distinct developmental stages. This dissertation provides information on host response to Bd across...
Resource Type:: Dissertation
Full Text:: , Ronnenberg KL, Powell CI, Walker SF, Bielby J, Garner TWJ, Weaver G, Fisher MC, The Bd Mapping Group (2013

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

Creator:: Wittkop, Judith Anne
Abstract:: The presence in rat liver microsomes of an enzyme system which demethylates N-methylhydrazines and azo compounds to formaldehyde has been reported. Some of the compounds found to be substrates were monomethylhydrazine, N-isopropyl-α-(2-methylhydrazino)- p-toluamide and the azo derivative of the latter hydrazine. This enzyme can be classified as a mixed function...
Resource Type:: Dissertation
Full Text:: ., Portland, Oregon. Rats used in experiments weighed 250-300 g. Fr e s h pork livers were generously

Effects of Diversity on Emerging Infectious Diseases of Amphibians

Creator:: Snyder, Paul W.
Abstract:: Species declines and extinctions have been recorded across taxa as evidence of an ongoing global biodiversity crisis. Amphibians are at the forefront of these declines with nearly one third of amphibian species estimated to be at risk of extinction. While many factors contribute to population declines and extinctions, the role...
Resource Type:: Dissertation
Full Text:: . Tomiya, G. O. U. Wogan, B. Swartz, T. B. Quental, C. Marshall, J. L. McGuire, E. L. Lindsey, K. C

Amphibian Population Declines and Extinctions: Disease in Amphibian Communities with Cascading Effects in Freshwater Communities

Creator:: Harjoe, Carmen C.
Abstract:: Earth is experiencing unprecedented biodiversity loss. Amphibians are at the forefront of this biodiversity loss, with species declines estimated to be more severe than those of birds and mammals. Amphibian population declines and extinctions are driven by a number of factors including climate change, habitat destruction, contaminants and disease but...
Resource Type:: Dissertation
Full Text:: :1819–1827. Bausch, D. G., and L. Schwarz. 2014. Outbreak of Ebola virus disease in Guinea: where

New insights on an old topic : understanding the effects of forest harvest on trout in the context of climate

Creator:: Penaluna, Brooke E.
Abstract:: Studies of the effects of forest harvest on streams and fish have a long history in the Pacific Northwest. Results of this work have prompted development of new forest harvest practices that are more protective of these resources, but the effectiveness of these new practices has not been fully evaluated....
Resource Type:: Dissertation
Full Text:: , Chairman’s Leadership award, Thomas G. Scott scholarship, Coombs-Simpson scholarship, and Oregon

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

Creator:: Bradley, Paul W.
Abstract:: The ongoing worldwide loss of biodiversity has been described as a "biodiversity crisis," "the Anthropocene defaunation," and alternatively "an extinction spasm." More recently, many scientists have come to the conclusion that we are witnesses to Earth's sixth major mass extinction event, which has the potential to fundamentally alter basic ecological...
Resource Type:: Dissertation

ScholarsArchive@OSU

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Context matters : A multi-scale assessment of riparian tree response to upslope density reduction

The Effects of Host and Pathogen Variation on Infection Dynamics in the Amphibian-Chytrid System

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

Effects of Diversity on Emerging Infectious Diseases of Amphibians

Amphibian Population Declines and Extinctions: Disease in Amphibian Communities with Cascading Effects in Freshwater Communities

New insights on an old topic : understanding the effects of forest harvest on trout in the context of climate

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

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