Index Catalog // ScholarsArchive@OSU

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Creator:: Alleau, Yvan M.
Abstract:: The organic content of the Columbia River suspended particulate matter (SPM) results from the input of autochthonous (phytoplankton) and allochthonous (terrestrial vascular plants) production. The contribution of these two sources appears seasonal and responds to factors such as rainfall, runoff, river flow, light and nutrients availability. While numerous studies have...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Yvan M. Alleau for the degree of

Organic matter compositions and loadings in soils and sediments along the Fly River, Papua New Guinea

Creator:: Goni, Miguel A., Moore, Eric, Kurtz, Andrew, Portier, Evan, Alleau, Yvan, and Merrell, David
Abstract:: The compositions and loadings of organic matter in soils and sediments from a diverse range of environments along the Fly River system were determined to investigate carbon transport and sequestration in this region. Soil horizons from highland sites representative of upland sources have organic carbon contents (%OC) that range from...
Resource Type:: Article

Substrate degradation kinetics, microbial diversity, and current efficiency of microbial fuel cells supplied with marine plankton

Creator:: Reimers, Clare E., Stecher, Hilmar A., Westall, John C., Alleau, Yvan, Howell, Kate A., Soule, Leslie, White, Helen K., and Girguis, Peter R.
Abstract:: The decomposition of marine plankton in two-chamber, seawater-filled microbial fuel cells (MFCs) has been investigated and related to resulting chemical changes, electrode potentials, current efficiencies, and microbial diversity. Six experiments were run at various discharge potentials, and a seventh served as an open-circuit control. The plankton consisted of a mixture...
Resource Type:: Article
Full Text:: . Stecher III,1 John C. Westall,2 Yvan Alleau,1 Kate A. Howell,1 Leslie Soule,1 Helen K. White,3 and Peter R

Mineral changes in cement-sandstone matrices induced by biocementation

Creator:: Verba, C., Thurber, A. R., Alleau, Y., Koley, D., Colwell, F., and Torres, M. E.
Abstract:: Prevention of wellbore CO₂ leakage is a critical component of any successful carbon capture, utilization, and storage program. Sporosarcina pasteurii is a bacterium that has demonstrated the potential ability to seal a compromised wellbore through the enzymatic precipitation of CaCO₃. Here we investigate the growth of S. pasteurii in a...
Resource Type:: Article
Full Text:: -sandstone matrices induced by biocementation M b C a b c a A R R A A K B B B C S S 1 e f D i c M a

Real-time monitoring of calcification process by Sporosarcina pasteurii biofilm

Creator:: Harris, Dustin, Ummadi, Jyothir Ganesh, Thurber, Andrew R., Allau, Yvan, Verba, Circe, Colwell, Frederick, Torres, Marta E., and Koley, Dipankar
Abstract:: Sporosarcina pasteurii is known to produce calcite or biocement in the presence of urea and Ca²⁺. Herein, we report the use of novel ultramicrosensors such as pH, Ca²⁺, and redox sensors, along with a scanning electrochemical microscope (SECM), to monitor a real-time, bacteria-mediated urea hydrolysis process and subsequent changes in...
Resource Type:: Article

Th-234 applied to particle removal rates from the surface ocean: A mathematical treatment revisited

Creator:: Alleau, Y., Colbert, D., Covert, P., Haley, Brian A., Qiu, X., Collier, Robert W., Falkner, Kelly, Hales, Burke, Prahl, Fredrick, and Gordon, L.
Abstract:: It has been recognized since the 1950's that radioisotopic disequilibrium between naturally occurring parent-daughter isotope pairs in seawater can provide information on the rate of processes segregating them. In the surface ocean, the U-238:Th-234 parent-daughter pair tends to display measurable disequilibrium that is attributable to the effects of scavenging on...
Resource Type:: Article
Full Text:: mathematical treatment revisited Y. Alleau, D. Colbert, P. Covert, B. Haley, X. Qiu, R. Collier, K. Falkner 1

Novel Copper and Iron Complexes along the Oregon Coastal Upwelling Margin

Creator:: Bright, Peter, W.
Abstract:: Copper and iron are essential micronutrients that are required by marine primary producers for a variety of metabolic processes. Over 99% of both copper and iron are bound within organic complexes in the marine environment, however the molecular identity of many of these complexes remains unknown. The speciation of these...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Rene M. Boiteau

Demystifying the Sensationalism of Human Trafficking: an Anthropological Study on the Systemic Exploitation of Migrant Labor in Tuscany, Italy

Creator:: Marconi, Veronica
Abstract:: In the last twenty years, human trafficking has gained attention in government agendas and media coverage, while anti-trafficking projects have burgeoned worldwide. Anti-trafficking efforts, however, have almost exclusively addressed the issue of sex trafficking with a focus on rescuing women, while overlooking other types of exploitation. This is noteworthy, given...
Resource Type:: Dissertation
Full Text:: Abstract approved: Lisa M. L. Price In the last twenty years, human trafficking has

Harnessing Heterogeneity in Human Gut Microbiome Data

Creator:: Tataru, Christine
Abstract:: The focus of this thesis is to design, characterize, and apply novel computational methods and molecular systems to interrogate heterogeneous human gut microbiome-related phenomena. In Chapter 2, I design, implement, and characterize a method for embedding co-occurrence patterns derived from massive 16s amplicon datasets. I use this method to 1....
Resource Type:: Dissertation
Full Text:: : Harnessing Heterogeneity in Human Gut Microbiome Data Abstract approved: Maude M. David The focus of this

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

Creator:: Suzuki, Yasuko
Abstract:: Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) nest in large colonies on East Sand Island in the Columbia River estuary, the largest known colonies for the two species in the world. Both species of piscivorous colonial waterbirds have been identified as predators with a significant impact on the...
Resource Type:: Dissertation
Full Text:: collection. Dr. Miguel Goni, Yvan Alleau, Bobbi Conard, and Mysti Weber from the College of Oceanic

ScholarsArchive@OSU

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Organic matter compositions and loadings in soils and sediments along the Fly River, Papua New Guinea

Substrate degradation kinetics, microbial diversity, and current efficiency of microbial fuel cells supplied with marine plankton

Mineral changes in cement-sandstone matrices induced by biocementation

Real-time monitoring of calcification process by Sporosarcina pasteurii biofilm

Th-234 applied to particle removal rates from the surface ocean: A mathematical treatment revisited

Novel Copper and Iron Complexes along the Oregon Coastal Upwelling Margin

Demystifying the Sensationalism of Human Trafficking: an Anthropological Study on the Systemic Exploitation of Migrant Labor in Tuscany, Italy

Harnessing Heterogeneity in Human Gut Microbiome Data

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search