Thesis (Ph. D.)--University of Chicago, 1918. / "Private edition, distributed by the University of Chicago libraries." "References": p. 13.

Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1965. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

the toxic effects resulting from acrylic monomer exposure can pose as occupational risk factors for those involved in the manufacture, distribution, and use of the monomer and as potential risk factors for those accidentally exposed. This study is a toxicological assessment of the in vivo (intact animal) and in vitro (isolated human cell culture) responses to acute methyl (α)-chloroacrylate (MCA) exposure.

<p> Synthetic methods for the preparation of 2,7-dimethoxy-1-naphthoic acid are presented. The selective reduction of this acid with sodium in liquid ammonia to give 1,4-dihydronaphthoic acid is described.</p> <p> The selective Birch reduction of 2,7-dimethoxynaphthalene to 1,4-dihydro-2,7-dimethoxynaphthalene has been accomplished. 2,7-Dimethoxy-3- isopropylnaphthalene was converted to 3-keto-12-methoxy-10-carbomethoxy-13-isopropylperhydrophenanthra-4,8,11,13-tetraene via, 1,2,3,4-tertrahydro-7-methoxy-6-isopropyl-1-carbomethoxynaphthalen-2-one. The transformation of 3-keto-12-methoxy-10-carbomethoxy-13-isopropylperhydrophenanthra-4,8,11,13- tetraene to methyl O-methyl-11-desoxycarnosate via methylation, thioketalisation, desulphurisation and hydrogenation is also described.</p> / Thesis / Doctor of Philosophy (PhD)

Oils from soybeans and catfish by-products were extracted using hexane, propane, and supercritical carbon dioxide (SCCO2). Free fatty acids (FFA), peroxide values (PV), anisidine values (AnV), total oxidation (TOTOX), induction point (IP), iodine values (IV), and 2-thiobarbituric acid reactive substance (TBARS) were all measured to analyze oxidation of these oils. The extraction yield of propane, hexane, and SCCO2 oils was 80.4, 94.5, and 90%, in respect to total lipid content. Oils extracted with SCCO2 were more oxidized than those extracted with propane and hexane; probably due to the higher temperature and longer extraction time. The IP correlated with AnV, IV, PV, and TBARS for soybean and catfish oils. These results suggest that IP is the optimum way to measure soybean and catfish oil stability.

Thorium is shown to react with 3-methyl-8-hydroxyquinoline in the molar ratio 1:5, but isolation of the pure anhydrous compound requires special precautions. Thermogravimetry and differential thermal analysis of the compound indicate, amongst other things, the existence of a thorium 3-methyl-8-hydroxyquinolate of 1:4 stoichiometry. The pH dependence of the precipitation of thorium 3-methyl-8-hydroxyquinolate is determined, and correlated theoretically, with data for thorium 2-methyl-8-hydroxyquinolate. Thermal and other studies on thorium 8-hydroxyquinolate emphasize its anticipated similarity to the 3-methyl-8-hydroxyquinolate, and its differences from the 2-methyl compound. The precipitation of at least two compounds of thorium and 8-hydroxyquinoline is demonstrated. 3-Methyl-8-hydroxyquinoline is established as a sensitive reagent for determining thorium by both bromometric and polarographic methods with good precision and accuracy. / Thesis / Master of Science (MS)

The reactions of iodomethane, diiodomethane, and formaldehyde over stoichiometric, O-terminated, and Cl-terminated α-Cr₂O₃ surfaces, were studied by thermal desorption spectroscopy. Adsorbed formaldehyde forms dioxymethylene species on the nearly-stoichiometric surface that react primarily above 600 K. Dioxymethylene decomposes via a Cannizzaro-type process with dehydrogenation to formate, and hydrogenation to methoxide. Methoxide hydrogenation produces methane and methanol near 670 K. Formate decomposition occurs at 720 K, producing acetylene, carbon monoxide, carbon dioxide and formic acid. The site requirements for these reactions are a cation/anion site pair. When the surface cations are capped with Cl, the reactivity associated with dioxymethylene intermediates above 600 K is not observed. At higher coverages, polymerization to paraformaldehyde is observed on both surfaces, and decomposition to formaldehyde is observed at 400 K in thermal desorption. Iodomethane and diiodomethane are used as sources of methyl and methylene surface species, respectively. Methyl fragments on the stoichiometric surface dehydrogenate to surface methylene and hydrogen as a rate limiting step to produce ethylene and methane at 505 K. On the oxygen-terminated surface, the methyl fragments undergo dehydrogenation and coupling to ethylene at 425 K, undergo oxygen insertion to formaldehyde at 425 K, and produce carbon dioxide, formic acid, and water above 700 K from the dehydrogenation of formate. Methylene fragments on the stoichiometric surface undergo diffusion limited coupling to ethylene at 390 to 490 K and produce methane at 520 K from dehydrogenation. On the oxygen-terminated surface, methylene undergoes oxygen insertion to produce formaldehyde at 450 K, produce carbon monoxide, formaldehyde, and water at 695 K from dioxymethylene dehydrogenation, and produce carbon dioxide, formic acid, and water above 700 K from the dehydrogenation of formate. / Ph. D.

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