Index Catalog // ScholarsArchive@OSU

The influence of early diagenesis on trace element and molybdenum isotope geochemistry

Creator:: Poulson, Rebecca L.
Abstract:: This thesis investigates the influence of early diagenesis on trace metal and molybdenum isotope behavior in marine and lacustrine environments. Chapter one is a synthesis of previous research in all the marine environments investigated, providing an essential geochemical context for interpreting the observed behavior of Mo in these settings. Chapter...
Resource Type:: Dissertation
Full Text:: Molybdenum Isotope Geochemistry Abstract approved: ______________________________________

Remineralization of marine particulate organic matter

Creator:: Burkhardt, Brian Gary
Abstract:: Marine microorganisms play a significant role in the cycling of nutrients in the open ocean through production, consumption, and degradation of organic matter (OM). Carbon (C), nitrogen (N), and phosphorus (P) are essential ingredients in every known recipe for life. However, the cycling of each of these elements proceeds at...
Resource Type:: Masters Thesis
Full Text:: 21, 2013. Title: Remineralization of Marine Particulate Organic Matter Abstract approved

Geochemical characteristics of iron-manganese nodules in seasonally-saturated soils of the Willamette Valley, Oregon

Creator:: Seter, Lisa M.
Abstract:: This study was initiated to characterize the distribution of Fe-Mn nodules and to elucidate trends of Fe, Mn, and P relative to the intensity of the annual cycles of reduction and oxidation. Nodules were enriched in Fe, Mn, and P relative to the soil matrix making them an integral part...
Resource Type:: Masters Thesis

Interactions between natural organic matter and gold nanoparticles stabilized with different organic capping agents

Creator:: Stankus, Dylan Paul
Abstract:: The adsorption of natural organic matter (NOM) to the surfaces of natural colloids and engineered nanoparticles is known to strongly influence, and in some cases control, their surface properties and aggregation behavior. As a result, the understanding of nanoparticle fate, transport and toxicity in natural systems must include a fundamental...
Resource Type:: Masters Thesis
Full Text:: Engineering presented on December 3, 2010. Title: Interactions between Natural Organic Matter and Gold

Exploring mechanisms that drive the development of reversible soil hydrophobicity

Creator:: Woolverton, Priscilla B.
Abstract:: This study focuses on one widespread characteristic of poor soil quality: hydrophobic soil. Previous research has produced conclusive evidence to show that soil hydrophobicity is affected by soil organic matter (SOM) and soil water content (WC). Hydrophobicity that responds to changes in WC is a unique form of surface hydrophobicity...
Resource Type:: Masters Thesis
Full Text:: evidence to show that soil hydrophobicity is affected by soil organic matter (SOM) and soil water

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:: initially for petroleum exploration research and then organic geochemistry in general (Simoneit, 2005

Characteristics of soil organic matter in two forest soils

Creator:: Crow, Susan E.
Abstract:: Soil organic matter (SOM) is the terrestrial biosphere's largest pool of organic carbon (C) and is an integral part of C cycling globally. Soil organic matter composition typically can be traced directly back to the type of detrital inputs; however, the stabilization of SOM results as a combination of chemical...
Resource Type:: Dissertation
Full Text:: : Characteristics of Soil Organic Matter in Two Forest Soils Abstract approved Soil organic matter (SOM) is the

U(VI) transport in subsurface materials: is two-site, one-species modeling sufficient?

Creator:: Harrington, Stephanie J.
Abstract:: Uranium adsorption to Hanford sediment was studied for various pH, total inorganic carbon concentrations, and total U(VI) concentrations. Both batch and transport studies were done in an attempt to understand the adsorptive trend of U(VI) on Hanford sediment, and the changes in adsorption as both pH and total inorganic carbon...
Resource Type:: Masters Thesis
Full Text:: - Kinetic Phosphorescence Analyzer TOC - Total Organic Carbon U - Uranium SYMBOLS AND TERMINOLOGY Aq

A provenance study of crypto-crystalline silicates at the Cooper's Ferry site : a geochemical approach

Creator:: Nyers, Alexander John
Abstract:: A provenance study of crypto-crystalline silicates was performed at the Cooper's Ferry archaeological site in west-central Idaho on the Columbia Plateau. In this research, the author used instrumental neutron activation analysis as well as portable x-ray fluorescence to examine and characterize the geochemistry of 300 geologic samples of crypto-crystalline silicates...
Resource Type:: Masters Thesis
Full Text:: to examine and characterize the geochemistry of 300 geologic samples of crypto-crystalline

Distribution and origin of organic matter preserved in modern surface sediments throughout Coastal SE Alaska

Creator:: Walinsky, Sarah E.
Abstract:: Twenty seven modern (top 1-2cm) sediment samples from multicores retrieved from throughout coastal SE Alaska were analyzed for their organic matter content and the source composition. Total organic carbon (TOC) as well as biogenic silica (bioSi), and calcium carbonate (CaCO3) content were analyzed to evaluate the organic matter content and...
Resource Type:: Honors College Thesis
Full Text:: : Distribution and Origin of Organic Matter Preserved in Modern Surface Sediments throughout Coastal SE Alaska

ScholarsArchive@OSU

The influence of early diagenesis on trace element and molybdenum isotope geochemistry

Remineralization of marine particulate organic matter

Geochemical characteristics of iron-manganese nodules in seasonally-saturated soils of the Willamette Valley, Oregon

Interactions between natural organic matter and gold nanoparticles stabilized with different organic capping agents

Exploring mechanisms that drive the development of reversible soil hydrophobicity

Polar organic compounds as tracers of environmental processes

Characteristics of soil organic matter in two forest soils

U(VI) transport in subsurface materials: is two-site, one-species modeling sufficient?

A provenance study of crypto-crystalline silicates at the Cooper's Ferry site : a geochemical approach

Distribution and origin of organic matter preserved in modern surface sediments throughout Coastal SE Alaska

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