Index Catalog // ScholarsArchive@OSU

Responses of algal populations to parasitism by Aphelidium chlorococcarum and chytrids in an Oregon sewage lagoon

Creator:: Woods, Wendy W.
Abstract:: The abundance of algal species and their parasites was monitored weekly for two years in a sewage lagoon at the Corvallis Airport, Oregon. During the cooler months, Euglena species were dominant followed by a Chlamydomonas assemblage in the spring and a predominantly Scenedesmus assemblage in the summer and fall. Parasites...
Resource Type:: Dissertation
Full Text:: Lagoon. Abstract approved: Redacted for Privacy Harry K. Phinney The abundance of algal species and

Continuum mechanics methods applied to root growth and the penetration of soil by roots

Creator:: McCoy, Edward L.
Abstract:: The principles of continuum mechanics provide a consistent framework for the derivation of mathematical statements describing transport of water and solute, and growth in plant tissue. These derivations are based upon the explicit consideration of the tissue as a mathematical continuum composed of a cell wall matrix, water, and solute...
Resource Type:: Dissertation
Full Text:: displacement velocities of elemental 118 cellular locations for the Zea and Phleum roots at 15, 20, and 25 h

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:: own lineage. Studies of H. pylori found all modern strains can be traced to 5 ancient populations

Evaluation of long term reacidification and growth of alfalfa on selected limed soils in western Oregon

Creator:: Doerge, Thomas A.
Resource Type:: Dissertation
Full Text:: . Soil Sci. Soc. Amer. Proc. 36:273-275. Buyanovsky, G. A. and G. H. Wagner. 1983. Annual cycles of

Physiological response of Nitrosomonas europaea to oxytetracycline, chromium, and silver

Creator:: Schaerer, Morgan A.
Abstract:: Nitrosomonas europaea carries out the first step in the biological nitrogen removal process in wastewater treatment by oxidizing ammonia to nitrite. It has been shown to be sensitive to a wide range of contaminants. The antibiotic oxytetracycline and the heavy metals chromium and silver have been found in wastewater influent....
Resource Type:: Masters Thesis
Full Text:: in e ex p er im en t re su lt s. R ef er en ce H al li n g - S o re n so n

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

Creator:: Burton, Marci S.
Abstract:: Nitrification and denitrification are major biological processes transforming nitrogen (N) in soils to plant available N, highly leachable nitrate (NO₃⁻) and gaseous N oxides. Although many studies in the past have studied N cycling communities, the effect of increased N inputs on ammonia-oxidizer and denitrifier population dynamics is still under...
Resource Type:: Masters Thesis

Geomicrobiology of marine sediment containing methane

Creator:: Briggs, Brandon R.
Abstract:: Marine sediments contain an abundance of methane that is biologically produced and plays a significant role in the global carbon cycle. Microbes responsible for the carbon cycle in marine sediments, and the processes that they carry out, need to be characterized in order to fully understand the role of this...
Resource Type:: Dissertation
Full Text:: CH4 (reaction 3) CH3COO- +H+  CH4 +CO2 ΔG0’= -36 kJ/ mol CH4 (reaction 4) Despite the

Transcriptional and physiological response of Nitrosomonas europaea to inhibition by chlorinated aromatics and heavy metals

Creator:: Sandborgh, Sean C.
Abstract:: This research investigates the physiological and transcriptional responses of Nitrosomonas europaea when exposed to chlorinated aromatic compounds and heavy metals under varying environmental conditions. It was found that transcriptional responses of identified sentinel genes correlate well with nitrification inhibition. Sorption of metals to biomass was also investigated and found not...
Resource Type:: Dissertation
Full Text:: monitored at approximately 45 min intervals for 3 h. 120 milliliters of cells were extracted at 60

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Creator:: Fernandes, Marcelo Ferreira
Abstract:: A method based on fatty acid (FA) analysis is used to profile microbial community structure (MCS). Various extraction protocols are available, which alter the types of FAs extracted from soils. The more time consuming but widely used protocol extracts only FAs from phospholipids (PLFA). This technique is desirable because PLFAs...
Resource Type:: Dissertation
Full Text:: on residue treatment (res); N rate (N); and sampling days (d). ………………….………………………… 151 H

Proteolytic maturation of vaccinia virus structural proteins

Creator:: VanSlyke, Judy K.
Abstract:: Vaccinia virus (VV) is a large DNA virus belonging to the Orthopoxvirus family. The viral replicative life cycle takes place solely within the cytoplasm of a mammalian host cell. The VV genome contains 196 open reading frames which are expressed in a highly regulated and temporal fashion in order to...
Resource Type:: Dissertation
Full Text:: and present my research. I also appreciate receiving the Mark H. Middlekauf Graduate Student Award

ScholarsArchive@OSU

Responses of algal populations to parasitism by Aphelidium chlorococcarum and chytrids in an Oregon sewage lagoon

Continuum mechanics methods applied to root growth and the penetration of soil by roots

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

Evaluation of long term reacidification and growth of alfalfa on selected limed soils in western Oregon

Physiological response of Nitrosomonas europaea to oxytetracycline, chromium, and silver

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

Geomicrobiology of marine sediment containing methane

Transcriptional and physiological response of Nitrosomonas europaea to inhibition by chlorinated aromatics and heavy metals

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Proteolytic maturation of vaccinia virus structural proteins

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