Index Catalog // ScholarsArchive@OSU

Studies on resistance of rice to Sogatodes oryzicola (Muir) and a parasitoid, Haplogonatopus sp., in Costa Rica

Creator:: Alvarez B., Francisco
Abstract:: Twenty-one rice cultivars were evaluated to determine the difference between populations of Sogatodes oryzicola (Muir) (Homoptera: Delphacidae) in Costa Rica and Colombia, Survival, mortality and population development of S. oryzicola on five selected cultivars was used to determine levels of plant resistance. The importance and potential of the parasitoid-predator Haplogonatopus...
Resource Type:: Masters Thesis
Full Text:: Costa Rica. Abstract approved: Redacted for Privacy s Ralph E. Beiky Twenty-one rice cultivars were

Toxicity of peppermint monoterpenes to the variegated cutworm, Peridroma saucia Hübner

Creator:: Harwood, Steven Hunter
Abstract:: The toxicity of menthol, menthone, pulegone, limonene, and a-pinene, five monoterpenes found in peppermint (Mentha piperita L.), to the variegated cutworm (Peridroma saucia Hiibner) was characterized by in vivo and in vitro methods. Pulegone and menthone caused slower growth over six days when incorporated into an artificial diet and fed...
Resource Type:: Masters Thesis
Full Text:: -processed by the author ACKNOWLEDGEMENTS I wish to thank my major professor, Dr. Ralph Berry, for his

Population dynamics, distribution, and control of nematodes in highbush blueberries

Creator:: Schroeder, Jan-Marie
Abstract:: Fluctuations in population density of Pratylenchus sp., Trichodorus sp., and Xiphinema americanum s. 1. in three blueberry fields were determined monthly for one year. Pratylenchus densities were greatest in August and least in October. Three distinct periods of population growth occurred; during January, April, and between June and August. Trichodorus...
Resource Type:: Masters Thesis
Full Text:: Phytophthora root rot complex (Ralph Garren, personal communication). Pathogenicity is often related to

The effects of abscisic acid on gene expression during wheat germination

Creator:: Ballo, Barbara
Abstract:: Germination of immature (Stage III) and mature (Stage V) wheat (Triticum aestivum L. var. Chinese Spring and Yamhill) embryos is prevented by the inclusion of 10⁻⁴ M abscisic acid (ABA) in culture medium. In addition, Stage III embryos develop into mature embryos in culture medium containing ABA. In the absence...
Resource Type:: Dissertation
Full Text:: Gene Expression During Wheat Germination Redacted for privacy Abstract approved: Ralph S. buatrano

Identification and characterization of some psychrotrophic heat resistant/sporeforming bacteria in the Grade A raw milk supply of Oregon

Creator:: Meer, Ralph R.
Abstract:: Heat resistant sporeforming psychrotrophic bacteria were isolated from raw milk samples from 59 Grade A farms in Oregon. Forty-nine of the 59 (83%) raw milk samples in this survey contained sporeforming psychrotrophic bacteria; isolates from twenty-four (40%) of the samples exhibited proteolytic properties. Populations of sporeforming psychrotrophic bacteria ranged from...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Ralph Meer for the degree of

Hemoglobin-binding proteins in the amphibian Taricha granulosa

Creator:: Francis, Ralph T.
Abstract:: The first reported observation of hemoglobin association with a plasma protein was made by Polonovski and Jayle in 1938. Since that time, countless investigators have contributed to the characterization of the hemoglobin- binding plasma protein, haptoglobin. Haptoglobins have been found in many mammals, including humans and in various birds. However,...
Resource Type:: Dissertation
Full Text:: granulosa AN ABSTRACT OF THE THESIS OF Ralph T. Francis Jr. for the degree of Doctor of Philosophy in

An assessment of potential impacts from the proposed State Street (Salem, Oregon) widening project on biotic resources

Creator:: Bucy, David Edward Morelock
Abstract:: The proposed widening of State Street between Lancaster Avenue and 25th Street in Salem, Oregon was evaluated regarding potential construction impacts on the biotic resources (vegetation, fish, wildlife, and wetlands) in the immediate area. The existing setting was surveyed to establish a base level from which to measure changes, arid...
Resource Type:: Capstone Project
Full Text:: department at Oregon State University, especially my major advisor, Dr. Gordon Matzke, whose refreshing

Isolation of newt lung ciliated cell models and characterization of their motile capabilities

Creator:: Weaver, Alice
Abstract:: The lack of a suitable demembranated cell model has hindered the study of the mechanisms responsible for the regulation of ciliary waveform and coordination. In this study procedures for the isolation of ciliated cells from the newt, Taricha granulosa, by trypsin dissociation, and their subsequent demembranation with Triton X-100 and...
Resource Type:: Masters Thesis
Full Text:: thank the other members of my committee, Drs. John Morris and Ralph Quatrano, for their advice and

Prey selection by peregrine falcons during the nestling stage in Alaska

Creator:: Hunter, Robin E.
Abstract:: Proper management of peregrine falcons (Falco peregrinus) includes management of its prey. Little quantitative data on prey selection by peregrine falcons have been collected. The objective of this study was to determine species and relative abundance of prey brought to eyries by peregrine falcons during the nestling stage and to...
Resource Type:: Masters Thesis
Full Text:: --Dr. Robert Anthony, Dr. Charles Henny, and Dr. Gordon Matzke. I am indebted to Paul Liedberg, U. S

Physiology of interrenal function in juvenile coho salmon (Oncorhynchus kisutch) and effects of hatchery rearing practices

Creator:: Patino, Reynaldo
Abstract:: Periodic determinations of plasma hormone levels suggested that changes in interrenal activity are unrelated to changes in thyroidal or gonadal activity during development (smoltification) of juvenile coho salmon (Oncorhynchus kisutch). Moreover, in an experiment where fish were reared under various conditions of crowding and water inflow rate, it appeared that...
Resource Type:: Dissertation
Full Text:: , Dr. Gordon Matzke, Dr. Frank Moore, and Dr. Lavern Weber, provided helpful criticism and advice for

ScholarsArchive@OSU

Studies on resistance of rice to Sogatodes oryzicola (Muir) and a parasitoid, Haplogonatopus sp., in Costa Rica

Toxicity of peppermint monoterpenes to the variegated cutworm, Peridroma saucia Hübner

Population dynamics, distribution, and control of nematodes in highbush blueberries

The effects of abscisic acid on gene expression during wheat germination

Identification and characterization of some psychrotrophic heat resistant/sporeforming bacteria in the Grade A raw milk supply of Oregon

Hemoglobin-binding proteins in the amphibian Taricha granulosa

An assessment of potential impacts from the proposed State Street (Salem, Oregon) widening project on biotic resources

Isolation of newt lung ciliated cell models and characterization of their motile capabilities

Prey selection by peregrine falcons during the nestling stage in Alaska

Physiology of interrenal function in juvenile coho salmon (Oncorhynchus kisutch) and effects of hatchery rearing practices

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