Index Catalog // ScholarsArchive@OSU

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Creator:: Schisler, David Albert
Abstract:: Fusarium spp. frequent conifer nursery soils yet are rarely recovered from coniferous forest soils. Experiments were performed to determine what influence humic-rich organic amendments and volatiles from soil, ectomycorrhizal fungi and ectomycorrhizae have on the populations of several physiologic and taxonomic microbial groups potentially related to this phenomenon. A comparative...
Resource Type:: Dissertation
Full Text:: privacy Dr. Robert G. Linderman Fusarium spp. frequent conifer nursery soils yet are rarely recovered

Analysis of Bacteroidales 16S rRNA gene sequences from a geographically isolated human population

Creator:: Petersen, Carolyn A.
Abstract:: Standard methods of measuring fecal pollution in water do not distinguish between human and non-human sources. Molecular technology enabled the development of host-specific markers that distinguish fecal sources. Human specific PCR primers, HF183F and HF134F, were designed based on phylogenetic analyses of partial 16S rRNA gene sequences from the Bacteroidales...
Resource Type:: Masters Thesis
Full Text:: Isolated Human Population. Abstract approved Katharine G. Field Standard methods of

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Creator:: Hoefnagels, Mariëlle Henriette, 1965-
Abstract:: Fusarium spp. are among the most important pathogens of Douglas-fir (Pseudotsuga menziesii) seedlings in bareroot nurseries. Currently the most effective disease control method is soil fumigation with methyl bromide. As methyl bromide is phased out, however, other disease management strategies may become more important. We explored two alternative approaches to...
Resource Type:: Dissertation
Full Text:: Fusarium spp. on Douglas-fir (Pseudotsuga menziesii) Abstract approved: Robert G. Linderman Fusarium

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Creator:: Fernando, W. Gerard Dilantha
Abstract:: Phytophthora vignae, causal agent of stem and root rot of cowpea (Vigna unguiculata), was reported for the first time in Sri Lanka. The pathogen was found in cowpea field soils from 3 of 5 geographic regions sampled. Only one site however, had plants exhibiting disease symptoms. Of the eight cowpea...
Resource Type:: Dissertation
Full Text:: Privacy Dr. Robert G. Linderman Phytophthora vignae, causal agent of stem and root rot of cowpea (Vigna

Post-translational modifications of vaccinia virus proteins : molecular analysis of the myristylated L1R gene produc

Creator:: Ravanello, Monica P. G.
Resource Type:: Dissertation
Full Text:: : molecular analysis of the myristylated L1R gene product AN ABSTRACT OF THE THESIS OF Monica P. G

Stable isotope probing of the ovine rumen for RDX degrading microorganisms

Creator:: Mitchell, Edward A.
Abstract:: The anaerobic and highly reductive conditions found in the ovine rumen are considered favorable for the degradation of the nitroaromatic explosives such as hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). In this study, we used stable-isotope-probing to determine the bacteria responsible for the degradation of RDX in the rumen. Results indicate 10 μg mL⁻¹ (45...
Resource Type:: Masters Thesis
Full Text:: responsible for the degradation of RDX in the rumen. Results indicate 10 μg mL-1 (45 μM) of 13C-RDX was

The genetic diversity of Ceanothus-infective Frankia

Creator:: Ritchie, Nancy J.
Abstract:: Frankia from root nodules of nine different species of Ceanothus were characterized. DNA was amplified directly from nodular material using the polymerase chain reaction (PCR). The amplified region includes the 3' end of the 16S rRNA gene, the intergenic spacer (IGS), and a large portion of the 23S rRNA gene....
Resource Type:: Masters Thesis
Full Text:: would also like to thank my committee members, Dr. Katharine Field and Dr. Peter Bottom ley, for all

Inhibition, kinetic and modeling studies of acetylene and 1-chloro-1-fluoroethene on reductive dechlorination of TCE and vinyl chloride

Creator:: Pon, George
Abstract:: Laboratory and modeling studies were performed with a mixed-anaerobic-culture obtained from the Evanite site in Corvallis, Oregon. The culture completely transforms trichloroethene (TCE) to cis-dichloroethene (c-DCE), vinyl chloride (VC), and finally to ethene. Acetylene inhibition studies were used to examine the culture's microbial activities. Kinetic studies determined the half-saturated constant...
Resource Type:: Dissertation
Full Text:: committee members, Dr. Peter Bottomley, Dr. Michael Schuyler, and Dr. DeSzoeke (graduate representative

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: major professor, Dr. Peter Bottomley, my minor professor, and Dr. David Myrold, committee member for

Remediation of atrazine in irrigation runoff by a constructed wetland

Creator:: Runes, Heather B.
Abstract:: Due to its frequent use in agriculture and its frequent detection in surface water, atrazine was chosen as a model compound to study the treatment capability of a surface flow wetland used to remediate irrigation runoff at a container nursery near Portland, Oregon. Further evaluation of treatment of atrazine was...
Resource Type:: Dissertation
Full Text:: committee members Dr. Peter Bottomley, Dr. Jennifer Field, Dr. James Moore, and Dr. Peter Nelson who were

ScholarsArchive@OSU

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Analysis of Bacteroidales 16S rRNA gene sequences from a geographically isolated human population

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Post-translational modifications of vaccinia virus proteins : molecular analysis of the myristylated L1R gene produc

Stable isotope probing of the ovine rumen for RDX degrading microorganisms

The genetic diversity of Ceanothus-infective Frankia

Inhibition, kinetic and modeling studies of acetylene and 1-chloro-1-fluoroethene on reductive dechlorination of TCE and vinyl chloride

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Remediation of atrazine in irrigation runoff by a constructed wetland

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