Index Catalog // ScholarsArchive@OSU

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:: alfalfa on selected limed soils in western Oregon AN ABSTRACT OF THE THESIS OF Thomas A. Doerge for the

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:: Atrazine in Irrigation Runoff by a Constructed Wetland. Abstract approved: Due to its frequent use in

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:: Fatty Acid Profiling of Soil Microbial Communities: A

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Creator:: Chacon, Stephany S.
Abstract:: The bottleneck in the turnover of soil organic matter (SOM) is the conversion of large molecular compounds into smaller compounds that can be transported through a cell membrane of a microbe for processing. Once inside the cell, organic compounds can be converted into biomass or be respired. The microbial depolymerization...
Resource Type:: Dissertation
Full Text:: compounds into smaller compounds that can be transported through a cell membrane of a microbe for

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:: populations of several physiologic and taxonomic microbial groups potentially related to this phenomenon. A

Interactions between microbial dynamics and transport processes in soils

Creator:: Rockhold, Mark L.
Abstract:: An experimental and numerical modeling investigation was conducted to study interactions between microbial dynamics and transport processes in variably saturated porous media. These interactions are important in a variety of applied problems such as water and wastewater treatment, bioremediation, and oil-field recovery operations. These processes and interactions also have great...
Resource Type:: Dissertation
Full Text:: a 40/50 grade of quartz sand (Accusand®, Unimin. Co.) measured in our laboratory. a clay soil [Leij

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: utilize a diverse range of carbon substrates using the Biolog assay. Redacted for privacy In a

Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes

Creator:: Eaton, Hillary L.
Abstract:: Cyclic nitramines released into all environmental compartments through anthropogenic activities are toxic and possibly carcinogenic and mutagenic. Soils on military ranges, located throughout the world in various climatic regions and close to human activities, are especially susceptible to cyclic nitramine contamination. The properties of soils on military ranges will directly...
Resource Type:: Dissertation
Full Text:: nitramines in soils is scarce, but appears to be a more efficient means of bioremediation than aerobic

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:: biologically produced and plays a significant role in the global carbon cycle. Microbes responsible for the

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: matter (OM) with a clay fraction constituted of low-activity clay with limited exchange and nutrient

ScholarsArchive@OSU

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

Remediation of atrazine in irrigation runoff by a constructed wetland

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

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

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

Interactions between microbial dynamics and transport processes in soils

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes

Geomicrobiology of marine sediment containing methane

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

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