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Filtering by: Creator Reeher, James A., Jr. Remove constraint Creator: Reeher, James A., Jr. Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • 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

  • 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

  • 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:
    to Dr. James Ingle Jr. and Dr. Lewis Semprini for their encouragement and continued support. There

  • Structure-Property Relationships of Disordered Electronic Materials : From Crystalline to Amorphous

    Creator:
    Surta, Todd Wesley, Jr.
    Abstract:
    Two perovskite materials (Bi0.5(A)0.5)(Sc0.5Nb0.5)O3, where A = K+ and Na+ were synthesized phase pure for the first time. Their structures were determined by indexing synchrotron X-ray diffraction data and subsequent combined Rietveld refinement on neutron and synchrotron X-ray diffraction data revealing significant disorder on the A-sites of these materials. A...
    Resource Type:
    Dissertation
    Full Text:
    Jr. A DISSERTATION submitted to Oregon State University

  • Studies towards the total syntheses of (+)-phomactins A, D and G

    Creator:
    Schwartz, Keith D.
    Abstract:
    Studies towards the total synthesis of (+)-Phomactin A (1), D (6), and G (9), fungal metabolites with unique molecular architecture and pronounced biological activity, are described. These studies resulted in the synthesis of advanced intermediates 354 and 356, which contain all of the carbon atoms of 1, 6 and 9....
    Resource Type:
    Dissertation
    Full Text:
    James D. White Studies towards the total synthesis of (+)-Phomactin A (1), D (6), and G (9), fungal

  • Asymmetric synthesis of cyclopropanes via a "zipper reaction"

    Creator:
    Lincoln, Christopher M.
    Abstract:
    The rearrangement of a homoallyl cation to a cyclopropylcarbinyl cation is thought to play a role in the biogenesis of a variety of cyclopropane-containing natural products,¹ a hypothesis which has previously led to the design of successful biomimetic syntheses of several natural products.² The strategy underlying this approach to cyclopropane...
    Resource Type:
    Dissertation
    Full Text:
    Synthesis of Cyclopropanes via a "Zipper Reaction" Abstract approved: James D. White The rearrangement of

  • Cis-2,5-diaminobicyclo[2.2.2]octane : a novel C₂-symmetric scaffold for asymmetric catalysis

    Creator:
    Shaw, Subrata
    Abstract:
    This thesis describes the development of a new enantioselective synthetic method employing chiral cis-2,5-diaminobicyclo[2.2.2]octane-based organometallic catalysts. The significance of this new method to organic synthesis is illustrated with preparation of enantioenriched products that are transformed to important pharmaceutical agents. Chapter 1 provides a brief historical overview of asymmetric catalysis, especially...
    Resource Type:
    Dissertation
    Full Text:
    [2.2.2]octane: A Novel C2-Symmetric Scaffold for Asymmetric Catalysis Abstract approved: James D

  • Luminescent sulfides and solution-deposited oxide thin films

    Creator:
    Anderson, Jeremy T.
    Abstract:
    Solid state luminescent sulfides are prepared as powders in order to elucidate the relationship between structure and light emission. While the sulfides studied in this dissertation are known phosphors, materials are investigated in a variety of new ways. Elementary properties and structures of MgS are reviewed, and preparation of MgS...
    Resource Type:
    Dissertation
    Full Text:
    approved:________________________________________________________ Douglas A. Keszler

  • 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

  • Studies towards the total synthesis of (-)-gymnodimine

    Creator:
    Wang, Guoqiang
    Abstract:
    Studies towards the total synthesis of (-)-gymnodimine (1), a marine neurotoxin with a unique molecular architecture and pronounced biological activity, are described. These studies resulted in a convergent approach to the advanced intermediate 315, containing the C3-C32 section of 1. Two synthetic routes were developed to construct the tetrahydrofuran subunit...
    Resource Type:
    Dissertation
    Full Text:
    Total Synthesis of ()-Gvmnodimine Abstract James D. White Studies towards the total synthesis of