Index Catalog // ScholarsArchive@OSU

Iron acquisition and its regulation in Nitosomonas europaea

Creator:: Vajrala, Neeraja
Abstract:: Iron is absolutely necessary for the maintenance, the defense, the differentiation and last, but by no means least, the growth and cellular division of almost all living organisms including Nitrosomonas europaea, an ammonia oxidizing bacterium. Given the necessity of iron, it is not surprising that N. europaea evolved several irondependent...
Resource Type:: Dissertation
Full Text:: of my committee members, Dan, Peter, Dr. Joyce Loper, Dr. John Baham and Dr. Chrissa Kioussi for

Experimental design of physical aquifer models for evaluation of groundwater remediation strategies

Creator:: Humphrey, Mark D.
Abstract:: Groundwater resources have become seriously threatened due to improper use by industrial, municipal, and even public sectors. Widespread contamination of aquifer systems has jeopardized human health and the environment and methods for restoring these systems are needed. Biological and chemical in situ remediation, where contaminants are degraded within the natural...
Resource Type:: Masters Thesis
Full Text:: evaluation of groundwater remediation strategies AN ABSTRACT OF THE THESIS OF Mark D. Humphrey for the

Nitrogen nutrition of seedling alfalfa (Medicago sativa L.)

Creator:: Eardly, Bertrand D.
Abstract:: Nitrogen fertilization of seedling legumes is a controversial practice intended to provide N to the plant during periods when seed N, soil N, and N₂ fixation may not meet plant requirements; eg. prenodulation, postharvest, or in the event of an inoculation failure. Field experiments were conducted in 3 consecutive years...
Resource Type:: Dissertation
Full Text:: .) AN ABSTRACT OF THE THESIS OF Bertrand D. Eardly for the degree of Doctor of Philosophy in Crop

Growth, yield and water use of rainfed wheat and maize influenced by tillage and fertilizer in Pothwar, Pakistan

Creator:: Ali, Safdar
Resource Type:: Dissertation
Full Text:: Russell Karow and Professor D. Hemphill. Special thanks are extended to Government of Pakistan and the

Treatment of dairy wastewater in a constructed wetland system : evapotranspiration, hydrology, hydraulics, treatment performance, and nitrogen cycling processes

Creator:: Niswander, Steven Francis
Abstract:: Five unique but related studies were conducted at the Oregon State University Dairy Wetland Treatment System (OSUDWTS), Corvallis, OR. The research site consisted of six parallel wetland cells, which were built in 1992 and began receiving concentrated dairy wastewater in the fall of 1993. Hydrologic, hydraulic, and water quality data...
Resource Type:: Dissertation
Full Text:: Corvallis, OR 24 2.3 Evapotranspiration (mm/d) for wetland cells at Oregon State University Dairy

The stratigraphy, hydrology, and redoximorphic character of the Jackson-Frazier wetland

Creator:: D'Amore, David V.
Abstract:: Transitional areas between upland and aquatic habitats, commonly known as wetland, were once viewed as unproductive areas and were drained for farming or pasture. Wetlands are now accepted as significant ecological resources, and their protection is a mandate of federal, state, and local land managers. Due to the diversity of...
Resource Type:: Masters Thesis
Full Text:: soils in the landscape. A 'geomorphic surface' has been defined by Daniels and Hammer (1992) as "an

Nitrate and water under terraced dryland wheat production in Oregon

Creator:: Strock, Jeffrey S.
Abstract:: Dry land agriculture using summer fallow is a common crop production practice in the Columbia Plateau region of eastern Oregon. Farmed-over level terraces are used to control surface water runoff and soil erosion. More than 70 percent of the average annual precipitation around Pendleton, Oregon (350 - 400 mm) falls...
Resource Type:: Masters Thesis
Full Text:: Richardson, 1988; Daniels and Hammer, 1992). Argil lic horizons decrease the rate of water transport

Evaluation of mix ingredients on the performance of rubber-modified asphalt mixtures

Creator:: Takallou, Hossein B.
Abstract:: Rubber-modified asphalt pavements have been used in Sweden and the United States since the 1970's. In these applications ground recycled tire particles (0.25 inch minus) are added to a gap-graded aggregate and then mixed with hot asphalt cement. The benefits of adding rubber to the mix include increased skid resistance...
Resource Type:: Dissertation
Full Text:: Procedures 264 APPENDIX C Case Histories 272 APPENDIX D Summary Initial (1983) and Follow-up (1984) 291

Polar organic compounds as tracers of environmental processes

Creator:: Medeiros, Patricia Matheus de
Abstract:: Sources of polar/water-soluble organic compounds conjunctly with apolar biomarkers were characterized in natural organic matter. This multi-biomarker approach was accomplished by a simple analytical method consisting of extraction with dichloromethane:methanol (2:1, v/v), silylation and analysis by gaschromatography- mass spectrometry (GC-MS). Polar and apolar biomarkers, derived mainly from higher plants and...
Resource Type:: Dissertation
Full Text:: Creek), and (d) key ion plot for triglyceride derivatives (m/z 343, 357, 369, 371, 397, 399) of the GC

Migration of E. coli and solutes to tile drains via preferential and matrix flow

Creator:: Moreno, Daniel
Abstract:: The extent of agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land applications of liquid manure on tile drain fields have the potential to transport solutes and bacteria to the drains following precipitation or irrigation events and many times are directly sent to a...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Iron acquisition and its regulation in Nitosomonas europaea

Experimental design of physical aquifer models for evaluation of groundwater remediation strategies

Nitrogen nutrition of seedling alfalfa (Medicago sativa L.)

Growth, yield and water use of rainfed wheat and maize influenced by tillage and fertilizer in Pothwar, Pakistan

Treatment of dairy wastewater in a constructed wetland system : evapotranspiration, hydrology, hydraulics, treatment performance, and nitrogen cycling processes

The stratigraphy, hydrology, and redoximorphic character of the Jackson-Frazier wetland

Nitrate and water under terraced dryland wheat production in Oregon

Evaluation of mix ingredients on the performance of rubber-modified asphalt mixtures

Polar organic compounds as tracers of environmental processes

Migration of E. coli and solutes to tile drains via preferential and matrix flow

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