Index Catalog // ScholarsArchive@OSU

Fluidized-bed nitridation of silicon : direct use of very fine powder for [α]-silicon nitride production

Creator:: Liu, Yao-Dian
Abstract:: 2 μm average sized silicon powder was nitrided with 90% N₂/10% H₂ in a fluidized-bed reactor, operated at 1200°C, 1250°C and 1300°C. To fluidize silicon powder, alumina particles with an average size of 300 μm were used as an inert fluidizing conditioner. The feasibility and operating conditions of the fluidization...
Resource Type:: Dissertation
Full Text:: extended to National Science Foundation, Shin-Etsu Chemical Company and Kyocera Chemical Company for

Properties of methyl bromide cooxidation by ammonia-oxidizing bacteria

Creator:: Duddleston, Khrystyne Noel
Resource Type:: Dissertation
Full Text:: solubility make it difficult to control their concentrations under most environmental conditions. Secondly

Remediation of atrazine in irrigation runoff by a constructed wetland

Creator:: Runes, Heather B.
Abstract:: Due to its frequent use in agriculture and its frequent detection in surface water, atrazine was chosen as a model compound to study the treatment capability of a surface flow wetland used to remediate irrigation runoff at a container nursery near Portland, Oregon. Further evaluation of treatment of atrazine was...
Resource Type:: Dissertation
Full Text:: technology that enable the determination of environmental levels of atrazine and its metabolites. Finally

Interactions between microbial dynamics, water flow, and solute transport in unsaturated porous media

Creator:: Yarwood, Rockie R.
Abstract:: Bioremediation in the vadose zone is unpredictable because of poor understanding of factors influencing microbial growth in this environment. A lab-scale experimental system was developed to examine, noninvasively, interactions between microbial growth, water flow, and solute transport in unsaturated porous media. Measurements of microbial colonization, and its impact on hydrology,...
Resource Type:: Dissertation
Full Text:: . Financial support for this work was provided by the National Science Foundation (grant #: 9630293) and the

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Creator:: Knight, Timothy R.
Abstract:: A variety of soil properties have been proposed and tested as potential indicators of soil quality. This study was conducted in an effort to produce a standardized soil quality index for systems in Oregon. Soils in both forested and agricultural systems were sampled in a wide variety of locations, climates,...
Resource Type:: Masters Thesis
Full Text:: of Master of Science in Soil Science presented on August 2, 2002 Title: Soil Biochemical Measures as

Monitoring redox conditions with redox indicators during microbial reductive dechlorination in microcosms and bioaugmented columns

Creator:: Ruiz-Haas, Peter A.
Abstract:: New methods, sensors, and devices based on redox indicators were developed to monitor redox conditions in anoxic and anaerobic laboratory systems and the subsurface environment. The primary application was monitoring redox conditions during the dechlorination of tetrachioroethene (PCE) to ethene (ETH) in packed columns and microcosm bottles containing an enriched...
Resource Type:: Dissertation
Full Text:: developed and applied to determine a "redox capacity" rather than "redox level". An environmental sample is

Synthesis and function of bioactive, block copolymer surfactant constructs as relevant to the preparation of anticoagulant and antibacterial medical implant surfaces.

Creator:: Joshi, Pranav R.
Abstract:: Nisin, an antibacterial peptide proven to be an effective inhibitor of Gram-positive bacteria, was incorporated into novel block copolymer constructs and tested for retained antibacterial activity. Covalent coupling was achieved by chemical modification of the N-terminal isoleucine to introduce a thiol group. Thiolated nisin derivatives were then linked to poly[ethylene...
Resource Type:: Dissertation
Full Text:: to Dr. Tom Shellhammer at the Department of Food Science and Technology, for help with Zeta

Tracking semi-volatile organic pollutants in remote lake systems

Creator:: Usenko, Sascha
Abstract:: SOCs volatility and persistence properties cause many SOCs to become ubiquitous in the environment as well as accumulate in areas with lower temperatures such as polar or orographic regions. Many anthropogenic SOCs pose a serious risk to human and ecosystem health because of their persistent, bioaccumulative, and toxic properties in...
Resource Type:: Dissertation
Full Text:: . WILSON, AND STACI L. SIMONICH Environmental Science and Technology American Chemical

Development, validation and the application of a congener specific photodegradation model for PBDEs

Creator:: Zeng, Xia
Abstract:: The thermodynamic properties of 39 PBDEs have been calculated using Gaussian 03 on the B3LYP/6-31G(d)//B3LYP/6-31G(d) level. The PBDE congeners' enthalpies of formation increase with increasing number of bromines and show a strong dependence on the bromine substitution pattern. The effects of bromine substitution pattern have been quantitatively studied by GAM...
Resource Type:: Dissertation
Full Text:: Organohalogen Compounds in Great Lakes Air. Environmental Science and Technology 2001, 35, 1078-1083. (14

Trans-Pacific and regional atmospheric transport of anthropogenic semivolatile organic compounds in the western U.S.

Creator:: Primbs, Toby
Abstract:: The atmospheric transport of anthropogenic semivolatile organic compounds (SOCs) from Asian sources to the Western U.S. was investigated. In addition, the SOC extraction method was optimized. Hansen solubility parameter plots were used to aid in the pressurized liquid extraction (PLE) solvent selection of air sampling media in order to minimize...
Resource Type:: Dissertation
Full Text:: . EPA STAR fellowship program and National Science Foundation CAREER for their financial support

ScholarsArchive@OSU

Fluidized-bed nitridation of silicon : direct use of very fine powder for [α]-silicon nitride production

Properties of methyl bromide cooxidation by ammonia-oxidizing bacteria

Remediation of atrazine in irrigation runoff by a constructed wetland

Interactions between microbial dynamics, water flow, and solute transport in unsaturated porous media

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Monitoring redox conditions with redox indicators during microbial reductive dechlorination in microcosms and bioaugmented columns

Synthesis and function of bioactive, block copolymer surfactant constructs as relevant to the preparation of anticoagulant and antibacterial medical implant surfaces.

Tracking semi-volatile organic pollutants in remote lake systems

Development, validation and the application of a congener specific photodegradation model for PBDEs

Trans-Pacific and regional atmospheric transport of anthropogenic semivolatile organic compounds in the western U.S.

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