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:: James McManus This thesis investigates the influence of early diagenesis on trace metal and

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

Creator:: Abbott, April N.
Abstract:: Ocean circulation is an important component in Earth's climate system. Predicting future climate and circulation changes requires an improved understanding of the past relationship between climate and ocean currents. The neodymium isotope composition (εNd) of water masses is frequently used as a quasi-conservative tracer to reconstruct ocean circulation. The current...
Resource Type:: Dissertation

On the chemical and physical limnology of Crater Lake, Oregon

Creator:: McManus, James, 1963-
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF James McManus for the degree of

Understanding Molybdenum Isotope Dynamics in Terrestrial Environments

Creator:: King, Elizabeth K.
Abstract:: This dissertation works towards determining the mechanisms driving the Mo isotopic composition of soils, and how these signals may be used to refine the use of Mo as a proxy of biogeochemical processes. The first step towards quantifying Mo fractionation in soils is to determine the mechanisms controlling Mo accumulation,...
Resource Type:: Dissertation
Full Text:: defined by three sinks (McManus et al., 2006). Under oxic conditions, the removal of Mo from the

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Creator:: Nielsen, Mark E.
Abstract:: A benthic microbial fuel cell (BMFC) is an electrochemical device that generates current from the redox gradient at the sediment-water interface. Early prototypes had anodes buried in anoxic sediments and cathodes in overlying water. The BMFCs described in this dissertation are based on a chamber design that enables the use...
Resource Type:: Dissertation
Full Text:: and Hong Liu provided helpful reviews of my manuscripts while Jim McManus and Jack Istok provided

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Creator:: Alder, Jay R.
Abstract:: This thesis presents the results of a formal evaluation of a new AOGCM, GENMOM, demonstrating its ability to simulate present-day climate and ENSO dynamics. The model is applied to simulate climate for the Last Glacial Maximum, deglacial, and Holocene time periods. The model output is evaluated against the best available...
Resource Type:: Dissertation
Full Text:: Brook for joining my committee on such short notice and Jim McManus for serving as my GCR. Though

Unraveling the Diagenetic Cycling and Sequestration of Rare Earth Elements (REEs) in Marine Sediments to Understand REE Accumulation in Ancient Shales

Creator:: Yang, Jon
Abstract:: The rare earth elements (REEs) have been established as powerful tracers for a range of physiochemical processes occurring in the natural environment. They also hold significant economic importance as many technological advancements are reliant upon the REEs for their unique magnetic, luminescent, and electrochemical characteristics. In sedimentary settings, understanding the...
Resource Type:: Dissertation
Full Text:: Yang, Marta E. Torres, James McManus, Ji-Hoon Kim, and Jaime Toro 11

Geochemical cycling in a Pacific Northwest estuary (Tillamook Bay, Oregon, USA)

Creator:: Colbert, Debbie L.
Abstract:: This thesis investigates the behavior of major inorganic nutrients (P, N, Si), trace metals (Mn, Fe), and alkaline-earth metals (Ba) within Tillamook Bay over seasonal cycles and under a range of river discharge conditions from October 1997 through December 1999. Located in the Pacific Northwest region, Tillamook Bay is an...
Resource Type:: Dissertation
Full Text:: Cycling in a Pacific Northwest Estuary (Tillamook Bay, Oregon, USA). Abstract approved: James McManus

Sediments and tectonics of the Gorda-Juan de Fuca plate

Creator:: Phipps, James B.
Abstract:: Cores taken from the ridge areas of the Gorda-Juan de Fuca plate have a sedimentation rate that is appropriate for the study of late Quaternary stratigraphy. An analysis of the clay and silt mineralogy of the cores using X-ray diffraction methods and by noting changes in the foraminiferan-radiolarian abundances in...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF James Benjamin Phipps for the

Immunotoxicity of the pyrrolizidine alkaloid monocrotaline in C57B1/6 mice

Creator:: Deyo, James A.
Abstract:: Monocrotaline (MCT) is a member of a class of naturally occurring phytotoxins known as pyrrolizidine alkaloids (PAs). Exposure to PAs can result in liver and cardiopulmonary lesions as well as lymphoid organ atrophy. In the present study C57BI/6 (B6) mice received MCT (0-150 mg/kg/day, po) for 14 days. Overt toxicity...
Resource Type:: Dissertation
Full Text:: in C57B1/6 mice AN ABSTRACT OF THE THESIS OF James A. Deyo for the degree of Doctor of Philosophy

ScholarsArchive@OSU

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

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

On the chemical and physical limnology of Crater Lake, Oregon

Understanding Molybdenum Isotope Dynamics in Terrestrial Environments

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Unraveling the Diagenetic Cycling and Sequestration of Rare Earth Elements (REEs) in Marine Sediments to Understand REE Accumulation in Ancient Shales

Geochemical cycling in a Pacific Northwest estuary (Tillamook Bay, Oregon, USA)

Sediments and tectonics of the Gorda-Juan de Fuca plate

Immunotoxicity of the pyrrolizidine alkaloid monocrotaline in C57B1/6 mice

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