Index Catalog // ScholarsArchive@OSU

Understanding the anodic mechanism of a seafloor fuel cell

Creator:: Ryckelynck, Natacha
Abstract:: Anoxic sediment overlain by oxic seawater establishes a voltage gradient on the order of 0.7-0.8V across the sediment-water interface. This study follows Reimers et al. (2001) and Tender et al. (2002) who reported the development of a seafloor fuel cell to harvest electrical energy from this potential difference. Prototype fuel...
Resource Type:: Masters Thesis
Full Text:: study follows Reimers et al. (2001) and Tender etal. (2002) who reported the development of a seafloor

Eolian transport of glycerol dialkyl glycerol tetraethers (GDGTs) off northwest Africa

Creator:: Fietz, Susanne, Prahl, Fredrick G., Moraleda, Núria, and Rosell-Melé, Antoni
Abstract:: Branched glycerol dialkyl glycerol tetraethers (brGDGTs) of purportedly terrestrial origin are frequently detected in marine sediments, even in remote ocean sites where no direct impact from land erosion via rivers takes place. At these places, the most likely explanation for the presence of brGDGTs is in situ production or eolian...
Resource Type:: Article
Full Text:: and atmospheric transport. Geochimica et Cosmochimica Acta 70, 13-26. Bendle, J., Kawamura, K

An examination of the form and variability of manganese oxide in Columbia River suspended material

Creator:: Covert, Paul Allister
Abstract:: Suspended particulate matter (SPM) in the Columbia River is a mixture of particles of several origins having varying physical and biogeochemical properties. The relative abundances of these freshwater particles changes with season and apparently also with tide. Prior investigation has quantified seasonal variation of organic material in both the Columbia...
Resource Type:: Masters Thesis
Full Text:: / Al hovers around 0.01 (crustal average= 0.011, Whetten et al., 1969) during the winter and early

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:: estuaries. Geochimica et Cosmochimica Acta 41: 13/3-/324. Callaway, R. J. and D. T. Specht. 1982. Dissolved

Microbial alteration of the seafloor

Creator:: Josef, Jennifer A.
Abstract:: In the early 1980's the first evidence of biological alteration of basalt glass (sideromelane) was published. Since that time additional evidence, including DNA staining, isotopic abundance and chemical mapping, has come to light suggesting that this unique alteration of glass can be attributed to microbial activity. Microbial alteration textures have...
Resource Type:: Masters Thesis
Full Text:: associated with elevated Fe/Ti ratios (Josef et al., 2002). When comparing the textures found in these

Siberian-Arctic shelf surface-sediments: sources, transport pathways and processes, and diagenetic alteration

Creator:: Viscosi-Shirley, Carolyn
Abstract:: This thesis investigates lithogenic sediments on the Siberian Arctic shelf, their sources, modes of dispersal, transport pathways and post-depositional diagenetic alteration. Working with cores collected from the Chukchi, East Siberian and Laptev Seas, we characterize surface-sediment elemental chemistry and clay mineralogy. We identify five regions with endmember sedimentary compositions. Comparing...
Resource Type:: Dissertation
Full Text:: and Bewers, 1996; Pfirman et al., 1997). Determining Arctic shelf sediment sources and transport

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Creator:: Wolhowe, Matthew D.
Abstract:: Recent works have investigated use of the hydrogen isotopic composition of C₃₇ alkenones (δD[subscript K37s]), lipid biomarkers of certain haptophyte microalgae, as an independent paleosalinity proxy. I discuss herein the factors impeding such an application and identify the potential alternative use of δD[subscript K37s] measurements as a proxy for non-thermal,...
Resource Type:: Masters Thesis
Full Text:: FIGURES Figure Page 1. Modified copy of Fig. 2 a-d from Schouten et al. (2006

Deconvolving the sedimentary phases of barium using flow-through time-resolved analysis

Creator:: Hsieh, Chih-Ting
Abstract:: The distribution of barite (BaSO₄) in marine sediments has long been studied as a proxy for paleoproductivity. While pure barite is known to be a stable mineral in oxic sediments, it is also known that variations in the Sr/Ba ratio influence its solubility and liability during early diagenesis. To extract...
Resource Type:: Masters Thesis
Full Text:: porewater due to delayed sample processing (modified plot from McManus et al., 1998)…………………………………….. 37

A terrestrial organic matter depocenter on a high-energy margin adjacent to a low-sediment-yield river : the Umpqua River margin, Oregon

Creator:: Hastings, Roxanne H.
Abstract:: Small, mountainous river systems have been increasingly studied due to their importance as sources of fluvial sediment and organic matter to the coastal ocean. Thus far, studies of small, mountainous river systems have focused on rivers with very high sediment loads. The well-studied Eel River dispersal system in northern California...
Resource Type:: Masters Thesis
Full Text:: (Muller-Karger et al., 2005; Dunne et al., 2007) with the majority of particulate organic carbon (POC

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:: equatorial Atlantic: suboxic diagenesis. Geochimica Et Cosmochimica Acta 43: 1075- 1090 Holmes DE, Bond DR

ScholarsArchive@OSU

Understanding the anodic mechanism of a seafloor fuel cell

Eolian transport of glycerol dialkyl glycerol tetraethers (GDGTs) off northwest Africa

An examination of the form and variability of manganese oxide in Columbia River suspended material

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

Microbial alteration of the seafloor

Siberian-Arctic shelf surface-sediments: sources, transport pathways and processes, and diagenetic alteration

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Deconvolving the sedimentary phases of barium using flow-through time-resolved analysis

A terrestrial organic matter depocenter on a high-energy margin adjacent to a low-sediment-yield river : the Umpqua River margin, Oregon

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

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search