Index Catalog // ScholarsArchive@OSU

Evaluation of sampling/preconcentration techniques and pyridine derivative reagents for fluorometric determination of chloroform and TCE in water

Creator:: Prayoonpokarach, Sanchai
Abstract:: A direct purge technique was developed for the determination of chloroform or trichloroethylene (TCE) in water samples. These volatile organic solvents are transferred from the water sample to a reagent where they are trapped and react to form products (Fujiwara chemistry) that are monitored fluorometrically. Chloroform in a water sample...
Resource Type:: Masters Thesis
Full Text:: Fluorometric Determination of Chloroform and TCE in Water Abstract approved: James D. Ingle, Jr. A direct

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:: Columns. Abstract approved: James D. Ingle, Jr. New methods, sensors, and devices based on redox

Polymeric submicron optical ion-selective sensors

Creator:: Bychkova, Valeriya
Abstract:: Ion-selective polymeric optical sensors – ion optodes – are a promising alternative to ion-selective electrodes and fluorescent dyes for analytical and biological applications, e.g. extra- and intracellular measurements. They are non-toxic, highly selective robust probes for ionic fluxes monitoring. A large-scale fabrication of ion optodes using a solvent displacement method...
Resource Type:: Dissertation
Full Text:: Submicron Optical Ion-Selective Sensors. Abstract approved: James D. Ingle, Jr. Ion

Adapting the Methylene Blue Sulfide Detection Method for Use in a Microfluidic in-situ Monitoring Device

Creator:: Monares, Shane W.
Abstract:: Sulfide is an important species to measure in environmental water samples. The spectrophotometric detection method for reduced sulfur species (sulfide) based on generation of methylene blue was adapted to work in an apparatus utilizing microfluidic PDMS mixing and observation cells with flow channels in the 100 μm range. The benefits...
Resource Type:: Honors College Thesis
Full Text:: : ________________________________________________ James D. Ingle Jr. Sulfide is an important species to measure in environmental

Design, characterization, and application of spectrometers for determination of low-level dissolved oxygen with small-volume sampling methodology

Creator:: Cakin, Defne
Abstract:: New analytical methods and instrumentation were developed for the determination of dissolved oxygen (DO) at low concentrations in water. The methods were based on monitoring the absorbance increase due to the oxidation of reduced indigo carmine (IC) by oxygen in the sample in different types of spectrometer cells. Spectrophotometer cells...
Resource Type:: Dissertation
Full Text:: : ___________________________________________ James D. Ingle, Jr. New analytical methods and instrumentation were developed for the

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Creator:: Vancheeswaran, Sanjay
Abstract:: At Site-300, Lawrence Livermore National Laboratory (LLNL), CA, trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane (TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants. Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS and TKEBS...
Resource Type:: Masters Thesis
Full Text:: .; Walsh, D. A., J. Am. Chem. Soc., 1980, 102:6, 1859-1864. (6) Eaborn, C., Organo-silicon Compounds

Micro total analysis system for in-situ and autonomous spectrophotometric monitoring of iron in groundwater

Creator:: Koch, Corey R.
Abstract:: We have developed a compact micro total analysis system (μTAS) to serve as a platform for in-situ spectrophotometric water quality monitoring. Individual fluidic, optical, and electrical components were designed, developed, and characterized. These components were combined in both an integrated (single lithographic “chip-based” platform) and a modular manner. The microfluidic...
Resource Type:: Dissertation
Full Text:: James D. Ingle We have developed a compact micro total analysis system (µTAS) to serve as a

Kinetic studies of the oxygen requirement of some amine oxidases

Creator:: Swindell, Robert Malcolm
Abstract:: Some kinetics of the oxygen requirement of amine oxidases have been investigated using bovine plasma monoamine oxidase (PAO) and pea seedling diamine oxidase (DAO). A system is described for studying enzyme reactions under controlled oxygen tension and in an O₂-free N₂ atmosphere. O₂ Km values were determined at two different...
Resource Type:: Masters Thesis
Full Text:: . D. J. Reed Some kinetics of the oxygen requirement of amine oxidases have been investigated

Depositional and diagenetic model for the Middle Devonian Denay Limestone, northern Antelope Range, Eureka County, Nevada

Creator:: Hoffmann, Heidi
Abstract:: Deposition of the Middle Devonian part of the Denay Limestone and Bay State Dolomite in the northern Antelope Range and Fish Creek Range, respectively, took place on and in front of a carbonate platform with a lime sand shoal at the shelf edge. In the Givetian part of the Denay...
Resource Type:: Masters Thesis

Time-Dependent Crack Growth Mechanisms in Alloy 617 at 800°C in Air

Creator:: Addison, Dylan, A.
Abstract:: Time-dependent crack growth mechanisms in Alloy 617 at 800°C in air were studied using compact tension samples machined in the L-T direction, cracked at temperature using an induction furnace and servo-hydraulic load frame. The application of different loading waveforms, including triangular, hold time, and sustained loading, were studied with relation...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Jamie J. Kruzic Julie D. Tucker Time-dependent crack growth

ScholarsArchive@OSU

Evaluation of sampling/preconcentration techniques and pyridine derivative reagents for fluorometric determination of chloroform and TCE in water

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

Polymeric submicron optical ion-selective sensors

Adapting the Methylene Blue Sulfide Detection Method for Use in a Microfluidic in-situ Monitoring Device

Design, characterization, and application of spectrometers for determination of low-level dissolved oxygen with small-volume sampling methodology

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Micro total analysis system for in-situ and autonomous spectrophotometric monitoring of iron in groundwater

Kinetic studies of the oxygen requirement of some amine oxidases

Depositional and diagenetic model for the Middle Devonian Denay Limestone, northern Antelope Range, Eureka County, Nevada

Time-Dependent Crack Growth Mechanisms in Alloy 617 at 800°C in Air

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