Index Catalog // ScholarsArchive@OSU

Development of automated on-line ion exchange systems for the determination of chemical speciation of trace metals in natural waters

Creator:: Liu, Yan
Abstract:: An automated on-line ion exchange trace enrichment system has been developed to improve the detection limits of flame atomic absorption (AA) spectrophotometry in the determination of trace metals in natural waters. The sample solution is passed through a column of Chelex-100 chelating resin by a carrier buffer stream delivered from...
Resource Type:: Dissertation
Full Text:: the determination of chemical speciation of trace metals in natural waters Yan Liu AN ABSTRACT OF

Chemical element profiles by instrumental neutron activation analysis : in, part 1, two species of wheat bunt spores, Tilletia caries (DC) Tul. and Tilletia controversa Kühn; part 2, representative sediment and basalt samples taken from a DSDP 678 m core, site 525A, Leg 74, Walvis Ridge

Creator:: Liu, Yun-gang
Abstract:: Part 1 The concentration of seventeen elements in two species of fungus which cause wheat bunt disease, Tilletia caries (DC.)Tul. (TS) and Tilletia controversa Kiihn (DS), were determined by instrumental neutron activation analysis in 37 TS spore samples, and 31 DS spore samples. Aluminum was chosen as a soil contamination...
Resource Type:: Masters Thesis
Full Text:: , Leg 74, Walvis Ridge AN ABSTRACT OF THE THESIS OF Yun-Gang Liu for the degree of Chemistry Master

Broadening the scope of the modified-Julia reaction : a mild and stereoselective method for the synthesis of (Z)-configurated α,β-unsaturated lactones

Creator:: Giesbrecht, Heath Eugene
Abstract:: An intramolecular variant of the modified-Julia olefination was demonstrated by the synthesis of α,β-unsaturated lactones in a mild and (Z)-selective fashion. The lynchpin reagent (benzothiazol-2-sulfonyl) acetic acid was synthesized in a straightforward fashion in 86% overall yield from commercially available 2-mercaptobenzothiazole via conversion to ethyl (benzothiazol-2-ylthio)acetate by base mediated alkylation...
Resource Type:: Masters Thesis
Full Text:: of the Modified-Julia Reaction: A Mild and Stereoselective Method for the Synthesis of (Z

Synthetic studies on marine natural products : I. Stereoselective synthesis of E,Z-1,3-Dienes by tandem nucleophilic addition to a dienylphosphonium salt followed by Wittig reaction. II. Synthesis of cyclopropyl oxylipins by a cation mediated carbocyclization

Creator:: Jensen, Mark S.
Resource Type:: Dissertation
Full Text:: . Stereoselective synthesis of E,Z-1,3-Dienes by tandem nucleophilic addition to a dienylphosphonium salt followed

A Reversible Conversion Cathode – Convert Dual-ion Battery into Rocking-Chair Battery

Creator:: Wu, Che-Yu
Abstract:: In Dual-ion Batteries, anions as charge carriers might be a potential technique of energy storage. While fluoride anion has been selected as a promising charge carrier for energy storage due to its high charge/mass ratio and small ionic radius, carbonate anion has never been reported as a charge carrier for...
Resource Type:: Masters Thesis
Full Text:: . David Cann, Dr. Kyriakos Stylianou, Dr. Hong Liu, and Dr. David Ji, for walking me through my Master

Development of Carbon-based Ion Selective Microsensors as Scanning Electrochemical Microscopy (SECM) Probes

Creator:: Ummadi, Jyothir Ganeshwar Reddy
Abstract:: The general theme of this dissertation is the application of novel carbon based micro sensors with the scanning electrochemical microscopy (SECM). SECM allows positioning of the probe without touching the substrate while mapping the chemical parameters in 3D space above the substrate. The main focus of the dissertation is the...
Resource Type:: Dissertation
Full Text:: ) Representative z-scan of the Ca2+ profile above the biofilm in the presence of brine and 10 g/L urea. The

Electron Diffraction of Neutral and Cationic Clusters Doped into Superfluid Helium Droplets

Creator:: Lei, Lei
Abstract:: In this dissertation, I describe the experimental investigation of electron diffraction of neutral and ionic clusters doped into superfluid helium droplets. The project is aimed at contributing to the development of an overall approach called ‘serial single molecule electron diffraction imaging (ss-EDI), a potential approach to solve macromolecule structures bypassing...
Resource Type:: Dissertation
Full Text:: Qiu, Dr. Dipankar Koley, and Dr. Hong Liu for their insightful comments and advice

The photochemistry of some insect juvenile hormone analogs

Creator:: Siggel, Lorenz
Abstract:: The photochemistry of some analogs of insect growth regulators (IGR's) was studied. Methyl geranate, TY, was synthesized and the mechanisms of its photochemical reaction pathways were studied by a variety of techniques. Direct irradiation of 71 in ether leads to the formation of five new products: 98, the product of...
Resource Type:: Dissertation
Full Text:: deconjugation to the Z isomer; and 97, the product of isomerization about the C-2 bond. Irradiation in the

Development of Methods for Stereoselective Carbon-Carbon Bond Formation

Creator:: Wu, Zhenhua
Abstract:: Three distinct methods to achieve the stereoselective synthesis of carbon-carbon bonds were investigated, encompassing: (i) the formation of axially chiral biaryl molecules by enantioselective Suzuki cross-coupling, (ii) the synthesis of α-phenylalkylboronic esters by enantioselective chain extension, and (iii) the stereospecific synthesis of alkenes by eliminative cross-coupling of enantioenriched sp³-hybridized carbenoids....
Resource Type:: Dissertation
Full Text:: the targeted alkene [(E)- or (Z)- isomer] as determined by choice of carbenoid stereochemical pairing

New luminescent materials and high-performance solution-processed oxide thin films

Creator:: Jiang, Kai
Abstract:: Crystals of an incongruent-melting compound, Ba₃MgSi₂O₈, were grown by the flux method and its structure was determined by single crystal X-ray diffraction methods. Ba₃MgSi₂O₈ crystallizes in trigonal space group P-3[bar]m1 with a = 5.6123(3) Å, c = 7.2667(9) Å and Z = 1. Eu²⁺ ions prefer one crystallographic Ba site...
Resource Type:: Dissertation
Full Text:: = 5.6123(3) Å, c = 7.2667(9) Å and Z = 1. Eu2+ ions prefer one crystallographic Ba site in the structure

ScholarsArchive@OSU

Development of automated on-line ion exchange systems for the determination of chemical speciation of trace metals in natural waters

Chemical element profiles by instrumental neutron activation analysis : in, part 1, two species of wheat bunt spores, Tilletia caries (DC) Tul. and Tilletia controversa Kühn; part 2, representative sediment and basalt samples taken from a DSDP 678 m core, site 525A, Leg 74, Walvis Ridge

Broadening the scope of the modified-Julia reaction : a mild and stereoselective method for the synthesis of (Z)-configurated α,β-unsaturated lactones

Synthetic studies on marine natural products : I. Stereoselective synthesis of E,Z-1,3-Dienes by tandem nucleophilic addition to a dienylphosphonium salt followed by Wittig reaction. II. Synthesis of cyclopropyl oxylipins by a cation mediated carbocyclization

A Reversible Conversion Cathode – Convert Dual-ion Battery into Rocking-Chair Battery

Development of Carbon-based Ion Selective Microsensors as Scanning Electrochemical Microscopy (SECM) Probes

Electron Diffraction of Neutral and Cationic Clusters Doped into Superfluid Helium Droplets

The photochemistry of some insect juvenile hormone analogs

Development of Methods for Stereoselective Carbon-Carbon Bond Formation

New luminescent materials and high-performance solution-processed oxide thin films

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