Chemistry Commons^™

Mass Spectrometric Study Of "Anomalous" Water, Bernard Jean Bouy

Masters Theses

"Considerable interest has developed recently in a material called "polywater" or "anomalous water". This material has properties quite different from those normally associated with liquid water. The purpose of this study is to give some mass spectrometric observations of "polywater". The "polywater" samples were produced within silica capillaries. These capillaries were heated by means of a helical coil to vaporize the "polywater". The vapor was directed into the source of a mass spectrometer. The results of this study show that a significant portion of the "anomalous water" samples is composed of a polymer of dimethylsiloxane. To date, the observations are …

The Ultraviolet Absorption Spectra Of Solutions Of 2, 4, 6-Trimethoxybenzoic Acid In Sulfuric Acid, Kathy Show-Shing Ho

Masters Theses

"Studies of the ultraviolet and proton magnetic resonance spectra of solutions of 2,4,6-tribromo-, trichloro-, trimethyl- and trinitro-benzoic acids dissolved in concentrated sulfuric acid by Dr. D. W. Beistel and his coworkers lead to the synthesis of the corresponding benzoate esters. In the present work the nature of ionic species formed in mixtures of sulfuric acid and 2,4,6-trimethoxybenzoic acid was examined, The spectral data suggest the presence of species similar to those assigned for the previous trisubstituted analogs, together with a species capable of fluorescence in the 2400 Å region. The reason of this unprecedented fluorescence has not been established"--Abstract, Page …

Metabolism Of 3-Iodotyrosine And 3,5-Diiodotyrosine By Thyroid Extracts, Shih-Ying Sun

Masters Theses

"A porcine thyroid enzyme was extracted from thyroid tissue by homogenization and differential centrifugation. The enzyme was capable of metabolizing both 3-iodotyrosine and 3,5-diiodotyrosine. All of the thyroid subcellular particles produced a fluorescent compound when incubated with these substrates. When the 1,000 x g sediment was supplemented with the 48,000 x g supernatant a second compound was formed. The compound was UV absorbing and has been identified as either 3-iodo-4-hydroxybenzaldehyde or 3,5-diiodo-4-hydroxybenzaldehyde depending upon which substrate was used. The 1,000 x g sediment was solubilized with 1% Conoco 1012-6 detergent. The activating factor in the 48,000 x g supernatant was …

Amino Acid Sequence Of An Iodotyrosyl-Containing Peptide Produced By Tryptic Digestion Of Thyroglobulin, Pai-Chun Chiang

Masters Theses

"Thyroglobulin was digested with trypsin. An iodotyrosyl-containing peptide was isolated from tryptic digests by a combination of electrophoresis and paper chromatography. The amino acid sequence of this peptide was determined by applying the Edman degradation and by using the proteolytic enzyme, carboxypeptidase A. The sequence of this peptide is: NH₂-Ala-Ile(Leu)-Ala-Ser-Phe-Gly-Asp-Tyr-Glu-Phe-COOH The importance of the position of the tyrosyl residue which is iodinated to form monoiodotyrosine (MIT) , diiodotyrosine (DIT) , and thyroxine (T₄) is considered in connection with the structure-activity relationship of the protein"--Abstract, page ii.

The Possible Correlation Of Carcinogenic Activity With Electronic Structure Of Benz(A)Anthracene, Patricia Joan Blair

Masters Theses

"The electronic structure of benz(a)anthracene based on the sigma and pi electrons was predicted by the modified intermediate neglect of differential overlap (MINDO) molecular orbital method and compared with the pi electronic structure determined by the Pople method. The crystalline molecular structure was used for both methods. The Pople calculation was also done on the aromatic molecular structure and a combination structure which assumed the bond lengths of the crystal structure and the bond angles of the aromatic structure. Chemical properties predicted by the MINDO and POPLE electronic structures were compared; the MINDO results provided the best agreement with experimental …

The Radial Distribution Curve Of "Anomalous" Water By X-Ray Diffraction, Jerome Dechelette

Masters Theses

"Amorphous and liquid samples, believed to be "anomalous" water were studied by X-ray diffraction. A diffusion ring, characteristic of liquids and glass was observed at Θ =10.5º. For purposes of comparison an X-ray diffraction pattern was obtained for pure water under nearly identical conditions. By means of a microdensitometer, X-ray intensity curves were prepared from the diffraction patterns and corrected for absorption and polarization. From the Fourier transform of the intensities, we obtained the radial distribution curves. The radial distribution curve for water, obtained in previous work, shows an initial peak at 2.9Å. This peak is due to the nearest …

The Anodic Oxidation Of Oxalic Acid On Au, Jean Louis Lucien Desmartin

Masters Theses

"The anodic oxidation of oxalic acid on Au has been studied at 25ºC in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H₂SO₄-K₂SO₄ solutions. A change in the Tafel slope in going from the lower to the higher Tafel region is explained by an alteration of the reaction mechanism due to electrical interactions between adsorbed species and the anode. Further details of an oxidation sequence involving resonant forms of oxalic acid are proposed"--Abstract, page 1.

A Study Of The Oxygen Exchange Between Chromate Ion And Water, James Hsiao-Hsin Chiang

Masters Theses

"The kinetics of the isotopic exchange reaction between O¹⁸-enriched chromate ion and solvent water have been measured as a function of pH and chromate ion concentration. The exchange kinetics can be explained in terms of the dimerization equilibria HCrO_4̄ + Cr₂O[subscript 7 with double dash above] [double arrows] Cr₂O[subscript 7 with double dash above] + OH⁻ and 2HCrO_4̄ [double arrows] Cr₂O[subscript 7 with double dash above] + H₂O except at high pH, where it is independent of pH. Rate constants at 30ºC for the reactions of the dimerization equilibria and the first order reaction at the high pH …

Enhanced Evaporation Of Water Droplets Due To Surface Contamination, Robert Bernard Hughes

Masters Theses

"Experimental evidence for enhanced evaporation of small (3-9 µ radius) water droplets are presented. Both "pure" droplets and droplets contaminated with surface active materials fell into air of known relative humidity (96-99 per cent) at an ambient temperature of 29.9C and evaporated. The rates of evaporation were determined by photographing the evaporating drops, measuring the distance a drop fell during a fixed time interval, and applying Stokes law. The contaminated droplets exhibited a rate of evaporation 1.8µ² sec⁻¹ faster than "pure" drops. This can be compared with rates for pure drops of 1.9 and 5.7µ² sec⁻¹ at 0.1 and 0.3C …

Studies Of Rare Earth Acid Oxalates, Kenneth Clinton Pyles

Masters Theses

No abstract provided.

Simultaneous Knudsen- And Torsion- Effusion Measurements Of The Vapor Pressures Of Tetraphenyltin And Hexaphenylditin, Dale Keiser

Masters Theses

No abstract provided.

Transpiration Measurements Of The Decomposition Pressures Of Barium Hexafluorosilicate, Kemal Cankaya

Masters Theses

No abstract provided.

Preparation And Lead Tetraacetate Oxidation Of Aldehydic Hydrazones, Alan J. Quarfoot

Masters Theses

No abstract provided.

The Effect Of The Rate Of Formation On The Structure And Properties Of Paper, William M. Reif

Masters Theses

Paper contains an uneven distribution of fiber fractions through its cross section. The objective of this study was to determine how the rate of formation affected the structure and properties of paper. The structure of paper was analyzed with reference to the cross-sectional distribution of fines and the fines to long fibers ratio in the paper.

The formation rate and distribution of fins were varied by applying a vacuum to the British sheetmold system. As the fines were a different color than the long fibers, their distribution was determined by analyzing the brightness values of layers split from the paper. …

The Wittig Reaction Of Stabalized Phosphonium Ylids With Derivatives Of D-Ribose, George Robert Wellman

Masters Theses

No abstract provided.

Knudsen- And Torsion- Effusion Measurements Of The Vapor Pressure Of Manganese(Ii) Fluoride, Walter Clayton Hitchingham

Masters Theses

No abstract provided.

Michael Reactions Part Iv Syntheses With Carboalkoxycarbenes, Frederick Ralph Carman

Masters Theses

"A preliminary investigation has been made involving syntheses with dicarboalkoxycarbenes for the purpose of developing new heterocyclic and alicyclic synthese employing functionalized carbenes. The ultimate goals were the development of a stereospecific synthesis of trans fused and angularly substituted ring systems suitable for conversion to natural products and the development of useful synthetic paths to the azabullvalene system. Although these ultimate goals were not realized, new and improved syntheses of alkyl substituted anisoles and diazomalonic esters, including the first reported synthesis of di-tert-butyl-diazomalonate were accomplished. The addition of dicarboalkoxycarbenes to di-, tri- and tetra- substituted ethylenes, tropilidene and 7-aza-tropilidenes by …

The Incorporation Of Oxygen-18 Into Oxindole Acid By Cells Of Hygrophorous Conicus, William Green Allen

Masters Theses

"To understand the mechanism of a biological oxidation in which oxygen is incorporated into a substrate, it is necessary to determine the origin of the incorporated oxygen. The objective of this investigation was to determine the origin of the oxygen atom incorporated into indoleacetic acid (IAA) by the IAA oxidase of Hygrophorous conicus through the use of oxygen-18. To determine the source of the oxygen atom incorporated into IAA it is necessary to incubate H. conicus cells with tryptamine or IAA in the presence of ¹⁸O₂ and H₂¹⁶O in one case and ¹⁶O₂ and H₂¹⁸O in another. An examination of …

Thermochemical Investigations Of The Methanol-Isopropanol System, Elmer Lee Taylor

Masters Theses

"Heats of solution and partial molar excess volumes at infinite dilution were determined for n-butanol, acetone, chloroform, and water in pure methanol, pure isopropanol, and several mixtures of the two at 25.0⁰C. The partial molar excess enthalpies of methanol and isopropanol were also determined and were combined to obtain integral heats of mixing. All heat data were obtained using a calorimeter of the heat-leak design, containing approximately 300 ml of solvent. Sample sizes ranged for 0.1 to 8 ml. Individual heat measurements were reproducible to 0.05 calories and reported values are considered to be accurate to 1% + 0.5 calorie …

Isotopic Anomalies Of Noble Gases In Natural Gas, Garry A. Bennett

Masters Theses

"This investigation of the abundance and isotopic composition of noble gases in helium-rich gas wells was undertaken in order to obtain new data which might be used to elucidate the origin of isotopic anomalies of noble gases in the atmosphere. Since noble gases are presently leaking to the atmosphere (Damon and Kulp, 1958a; Bieri et al., 1967-) the isotopic composition of the present atmosphere is not static. The direction of change, and ultimately the origin of anomalous noble gases, might therefore be discovered in studying the noble gases presently leaking from the earth. Since the two major noble gas isotopes …

Studies In Syntheses Of Non-Isoprenoid Sesquiterpenes, Raojibhai Javerbhai Patel

Masters Theses

The purpose of this study was to find the shortest route to prepare the 1,9-dimethyl decalone system I, a key intermediate in the synthesis of non-isoprenoid sesquiterpenes. The decalone system I was prepared in good yield by dehydrating the hydroxyketone II with 50% H₂SO₄. The dehydration of hydroxyketone II was also affected by heating in the presence of iodine crystals to yield 80% of the decalone system I.

The basic kinds of approaches under investigation were the Diels-Alder reaction and the Robinson annellation. The Diels-Alder reaction between the conjugated diene, 1-acetoxybutadiene (III) and 2,3-dimethylcyclohexenone (IV) under …

The Vapor-Liquid And Liquid-Liquid Phase Equilibria For The Partially Miscible System Methanol-Cyclohexane, Richard A. Christman

Masters Theses

By use of techniques of previous workers for determining liquid-liquid equilibrium and through the use of a circulation still, the complete phase diagram for the partially miscible system, methanol-cyclohexane, was determined. Tile accuracy of earlier liquid-liquid phase data was not improved upon although it was closely approximated. The critical solution temperature was found to be 46.4 degrees C., which is within the range of temperatures reported in earlier measurements.

Activity coefficients of methanol and cyclohexane were calculated from the phase boundaries of the boiling point diagram determined in the present investigation. These activity coefficients were in agreement with the Gibbs-Duhem …

An X-Ray Diffraction Study By The Powder Method Of Solid Solutions In The System Zno-Cro3-H2O At 25° C, William Alan Livingston

Masters Theses

No abstract provided.

Spectrophotometric Studies Of Complex Formation Of Alpha Aminohydroxamic Acids, Jing Shyong Chen

Masters Theses

No abstract provided.

Cerebrosides Of Human Aorta: Isolation And Fatty Acid Distribution, Eric Coles

Masters Theses

No abstract provided.

Kinetics Of The Thermal Decomposition Of Acetonitrile, Thomas William Asmus

Masters Theses

No abstract provided.

Fluorescence Studies Of Cobalt (Iii) Complexes, Arnold T. Weibel

Masters Theses

No abstract provided.

The Effect Of Impurities On The Time Dependence Of The Surface Tension Of Aqueous Surfactant Systems, Elizabeth Ann Munson

Masters Theses

"In this study surface tension measurements were made on tetradecylpyridinium bromide (TPB) solutions both in water in solutions containing various concentrations of impurities. Three impurities were studied, dodecyl alcohol, decyl alcohol and dodecylpyridinium bromide. Surface tension vs. time plots were constructed and show a definite dependence on the concentration of the impurity added. As the concentration of the impurity increases the equilibrium surface tension decreases. The decrease in the equilibrium surface tension is also dependent upon the concentration of the tetradecylpyridinium bromide. As the concentration of the surfactant (TPB) increases the effect of the impurity is reduced"--Abstract, page i.

Geochemical Abundance Of Iodine, Jane Hanisch Bennett

Masters Theses

"The research reported herein includes unpublished iodine and uranium data on a group of United States Geological Survey standards and on a group of ultrabasic rocks. Data are also included for the major rock types, deep sea sediments, and for graphite and troilite inclusions in iron meteorites. Tellurium data for the troilite are also reported. Appendix I is a literature article (Bennett and Manuel, 1967a) on Canyon Diablo Graphite. Appendix II is a literature article (Bennett and Manuel, 1967b) on deep sea sediments. The results of this study show that most of the earlier estimates of the crustal abundance of …

The Dispersing Power Of Oxidized Starches On Aqueous Pigment Suspensions, Louis K. Wilhelm

Masters Theses

No abstract provided.