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Studies On The Preparation Of Tetrasubstituted Hydrazones, William Kao

Masters Theses

Introduction

In a recent study of the ultraviolet spectra of substituted hydrazones, it was concluded that a sterio effect existed in tetrasubstituted hydrazones that significantly hindered complete rotation about the nitrogen-nitrogen bond. Weber¹⁶ noted that di- and tri-substituted hydrazones exhibited similar spectra with three strong absorption bands at approximately 235, 300, and 340 mu. In acid solutions, the spectra of these compounds showed a marked decrease in intensity of the long wavelength band. It has been postulated that this change was a consequence of the protonation of the non-bonding electron-pair on the amino nitrogen atom, and thus correlated the …

The Cleavage Of Diborane By Tetra (Dimethylamino)Diboron And The Preparation Of Some Dihale (1, 10-Phenanthroline)Boron(Iii) Cations, Jack D. Cummins

Chemistry and Chemical Biology ETDs

Boron hydrides were first described and characterized by Stock (1). His early work has led to the proposal of about twenty new, distinctly identifiable hydrides (2). Of the proposed hydrides, it has been established that diborane-6 (B2H6), tetraborane-10 (B4H10), and nonaborane-15 (B9H15) contain bridged BH2 groups in the boron hydride framework (2,3,4,5,6,7,8,9). The proposed structures for these compounds is shown in fig. 1 (2,10).

Development, Verification, And Use Of Methods To Model Chemical And Thermal Processes Lakes Mead And Powell, Bureau Of Reclamation

Publications (WR)

PURPOSE The purpose of the proposed research is to quantify the effects that Lakes Mead and Powell have on the salinity in the Colorado River system, and to evaluate changes that cap be made to the operating system of the reservoirs (within legal/institutional constraints) to enhance salt precipitation and/or minimize evaporation within the reservoirs. The effect of any changes (i.e., selective withdrawal uses, pumped storage, etc.) on reservoir evaporation could also be evaluated with a goal of minimizing evaporation. This will be accomplished through the development of a mathematical model of the reservoirs as described below. BACKGROUND Two major problems …

Potential Neoplasm Inhibitors Ii, Ronald Lee Floyd

Master's Theses

No abstract provided.

A Study Of The Base Catalyzed Decompositions Of Azoacetates, David V. Herman

Masters Theses

Introduction

The formation of a benzyne intermediate has been shown by several investigators ^(2,5,6) to be developed in at least four different reactions; the reaction of o-dihalobenzenes with magnesium or lithium, aryl halides with strong nucleophiles, o-halobenzophenones with potassium amide in liquid ammonia, and the decomposition of benzenediazonium-2-carboxylate.⁽¹³⁾ The mechanism propsed for one of the above most relevant to the following study, the reaction of o-halobenzophenones with potassium amide in liquid ammonia, is outlined in the following sequence:

Liquid Scintillators. The Stability Of Organic Scintillator Solutes Toward Ultra-Violet Radiation. The Photooxidation Of 2, 5-Diphenyloxazole, Harold A. Mackay

Chemistry and Chemical Biology ETDs

An insight has been gained concerning the stability of organic scintillator solutes in toluene on exposure to ultraviolet light while in the presence of oxygen and water. Oxygen and water, from either solute or solvent, not only function as quenchers but may continue to react with the solute molecule via a photooxidation process. Removal of these materials from the 2, 5-diphenyloxazole toluene system resulted in a marked improvement in stability of the system on exposure to ultraviolet light. The choice of scintillator solute, in addition to water and oxygen, and the time of ultraviolet irradiation, has a pronounced effect on …

Polarographic Investigation Of Several Tetrakis 1, 3-Diketone Europium Chelates In Acetonitrile, Samuel Lee Jeanjaquet

Chemistry and Chemical Biology ETDs

This study is concerned with the polarographic behavior of several tetrakis 1, 3-diketone chelates of europium and of the 1, 3-diketone ligands in acetonitrile. Such a study should reveal the following: (a) whether the europium (III) in the complexes is reduced directly to the metal, or if reduction to europium (II) takes place followed by reduction to the metal; (b) whether ligands are released during the reduction step(s) and if so, how many; (c) whether the polarographic behavior is such that dissociation constants of the complexes or complex ions can be determined by measuring the shift in half-wave potential as …

Scaling In Carbon Monoxide And Nitrogen, Jerry Goodisman

Chemistry - All Scholarship

No abstract provided.

Nature Of Non-Biological Decomposition Of Nitrite In Acid Media, Mukkatira Kariappa Mahendrappa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Curiosity is the cause of investigations, and the thirst for knowledge originates from it. Many times at the end of investigations, the number of questions raised are greater than those for which answers are sought. Therefore, all the information gathered through scientific investigations may not be of value for immediate application in practical life. Nevertheless, no research can be considered less important than the other because the integration of several scientific findings considered less less important at the time of investigation may reveal something of very high significance. Similarly, the study of various transformation reactions that the added fertilizers undergo …

Refinements In The Isomer Distribution And Relative Rate Of Sulfonation Of Toluene And Hydrochlorination Of Olefins With Stannic Chloride Catalyst, David George Guillot

Theses and Dissertations

The sulfonation of toluene at -12.5° C. with sulfur trioxide in liquid sulfur dioxide was found to give 10.03 ± 0.20 % ortho, 0.73 ± 0.20 % meta and 89.24 ± 0.20 % para isomers. This isomer distribution was determined by isotope dilution analysis using sulfur-35 enriched sulfur trioxide. After dilution of aliquots of the neutralized sulfonation mixture with pure sodium salts of each of the isomers prepared from the corresponding toluidines, the isomers were converted to the p-toluidine salts, purified by recrystallization, and counted by liquid scintillation counting. The relative rate of sulfonation of toluene compared to benzene was …

Multiple Trace Element Assay By X-Ray Fluorescence, Richard Pierre Koshakji

Archived Theses and Dissertations

No abstract provided.

Synthesis And Nuclear Magnetic Resonance Studies Of Some Boron And Nitrogen Substituted Borazines, Michael G. Henk

Master's Theses (1922-2009) Access restricted to Marquette Campus

From the time Stock and Pohland (44) first prepared borazine in 1926 until Schaeffer and Anderson (33) found a convenient method of preparing borazine in 1949, comparatively little work was done with this compound. Since 1949 work with borazine has progressed geometrically. Today there are a large number of borazines known (15, 36). However, fluorine substituted borazines were unknown until 1962 (29) and to this day very little work has been done with fluorine substituted borazines (2, 27, 30). Also, only a few unsymmetrical borazines have been prepared (38, 40, 41, 42). It would be desirable to have a convenient …

Studies On The Ribosomal Ribonucleic Acids From Mesophilic And Thermophilic Bacteria, Alice A. Holazo

Masters Theses

Introduction

Certain organisms have been known to live at temperatures at which cellular constituents ordinarily sensitive to heat are destroyed. These organisms. called thermophiles (heat-loving), normally live at higher temperature range of the biokinetic zone (10^o-45^oC).

Hydrolysis Of Benzohydroxamic Acid, Robert L. Fuller

Masters Theses

Introduction

The hydroxamic acids were discovered in 1869 by H. Lossen¹. The nomenclature, structure, and chemistry of these compounds have been summarized in an excellent review article by Yale².

Spin-Resonance Transitions Of Free Radicals In The Zeeman Region, Juana Vivó Acrivos

Faculty Publications, Chemistry

No abstract provided.

A Method For The Determination Of Solanesol In Tobacco, Ludwig Weissbecker

Master's Theses

The object or this work was to develop a procedure for the quantitative determination of solanesol in the petroleum ether extract of tobacco. The amount of tobacco extracted into petroleum ether is routinely used to differentiate tobacco types. The extraction procedures have been extensively studied by the Association of Official Agricultural Chemists (AOAC) and reported in the United States Department of Agriculture (USDA) Technical Bulletin # 1186.

There is at present no method for the quantitative determination of solanesol. One procedure which comes closest, involves an infrared measurement of the tobacco extract. Because of the presence of other bands, the …

Egg Shell Quality, R J. Bishop

Journal of the Department of Agriculture, Western Australia, Series 4

Recent overseas work and local industry developments indicate that the calcium content of feed for laying hens in Western Australia should be increased to achieve satisfactory egg shell strength.

Age, temperature and breeding are other important influences on egg shell quality.

A Study Of Some Properties Of As2S3 Glass And The Test Of A New Theory Of Glass Formation, Edward Nashed Bolous

Archived Theses and Dissertations

No abstract provided.

The Synthesis Of 4-Spiro-2-Aryloxazolines Of Potential Pharmacological Interest, Paul Waddell Collins

Theses and Dissertations

Numerous and diverse physiological actions are found among 2-oxazoline compounds. No reports of the synthesis or biological testing of 4-spiro-2-aryl-2-oxazolines were found in the literature. On the basis of the known pharmacological activities of certain aza- and diazaspirans, it was felt that 4-spiro-2-aryl-2-oxazolines should possess medicinal activity. In particular, it was reasoned that the combination in a bicyclic spiro structure of the 2-oxazoline ring with rings systems commonly found in synthetic antitussive compounds might result in active antitussive agents.

The aim of this research was the synthesis of a series· of 2-aryl-2-oxazoline-4-spirocyclopentanes and a series of 1'-methyl-2-aryl-2-oxazoline-4-spiro-4’-piperidines. Six members were …

The Electrical Resistivity Of Different Types Of Glasses, Fadel Youssef Iskandar Assabghy

Archived Theses and Dissertations

No abstract provided.

Synthesis Of Benzyl Beta D-Gulopyranosiduronic Acid-(2',3': 4,5)-Oxazolidone-2, Gerald Duane Shryock

University of the Pacific Theses and Dissertations

Although D-glucosamine has been found as a constituent of some antibiotics (28), very little research has been carried out in the area of synthetic preparations. Dutcher (7) recently reviewed the biochemical importance of this class of amino sugars as a constituent of complex antibiotic substances which compose the streptothricin family. For a complete elucidation of these antibiotics, it becomes necessary to investigate thoroughly the synthesis and reactions of the D-glucosamine compounds. Gross et al. (12) have succeeded in preparing the oxazolidone of α-D-glucosamine as well as some derivatives (13) of this compound. The present work reports an attempt to prepare …

The Activity Of Succinic Dehydrogenase And Indole Acetic Acid Oxidase In Cell-Free Preparations Of Hygrophorous Conicus, Jagdish M. Mehta

Masters Theses

"The enzyme indole acetic acid oxidase is produced by the fungus Hygrophorous conicus when it is grown in the presence of indole acetic acid (IAA) or tryptamine. The IAA acts both as an inducer and a substrate for this intracellular enzyme. The product of the oxidation catalyzed by the IAA oxidase is oxindole acetic acid (OIAA).

The rate of growth and the rate of formation of the enzyme IAA oxidase by H.conicus were studied in different media. Of these, a nitrate medium containing 0.5 per cent Yeast extract (Y.E.) was found to be the best for the production of H.conicus …

The Occurrence And Distribution Of Methane In The Marine Environment, Larry Philip Atkinson

OES Faculty Publications

The distribution of methane in several anoxic marine environments is described. Maximum concentrations observed were μ mole CH₄-C/liter. The distribution of methane seems to follow that of sulfide. The data indicate that methane is derived from organic compounds not containing nitrogen or phosphorus and that its formation is much slower than that of sulfide.

Some Properties Of Cerium Borate And Phosphate Glasses In Relation To Structure, M Osama El-Bayoumi

Archived Theses and Dissertations

No abstract provided.

The Synthesis Of Benzyl N-Carbobenzoxy Beta-D-Glucosaminid Uronic Acid Derivatives, Stuart Martin Block

University of the Pacific Theses and Dissertations

The purpose of this research is the preparation and characterization of derivatives of benzyl N-carbobenzoxy-β-D-glucosaminiduronic acid. Previously the derivatives of benzyl N-carbobenzoxy-α-D-glucosaminid-uronic acid have been prepared by H. Weidmann and H. K. Zimmerman (32). The procedure upon which both these uronic acid syntheses is based has been developed with the utilization of platinum in the selective catalytic oxidation of both the benzyl α- and β-D-glucuronosides. The applicability of this research is in the development of new intermediates for the preparation of new diamino sugars or other natural products.

Capillary Behavior Of Viscous Liquids, Marvin De Young

University of the Pacific Theses and Dissertations

A major problem confronting every investigator who works with synthetic organic chemistry is that of the crystallization of the products obtained. This problem necessitates extensive attention both on the experimental and on the theoretical level. In order to gain an understanding of the behavior of substances in the liquid state, so as to be better able to manipulate them in procedures intended to induce crystallization from complex mixtures, considerable attention has been given to various models of the liquid state. An understanding of the nature of pure liquids would seem to be an essential prelude to any attempt to understand …

Investigation Of The Cis-Trans Isomers Of Tetrachlorodiaquorhodate (Iii) Anion, Kenneth Lee Bridges

Dissertations and Theses @ UNI

A coordination compound, or complex, is formed when an atom, molecule, or ion unites by donating a pair of electrons with another atom, molecule, or ion able to accept the pair. In metal .coordination compounds, a metal-ion is the electron pair acceptor and usually is able to accept more than one pair. The number of electron-pairs which can be used in bonding is called the coordination number. The donor atom, molecule, or ion is called a ligand.

Rearrangements In The Synthesis Of Β-Ketoallyl Amines, Richard P. Rebman

Open Access Master's Theses (through 2010)

The work reported in this thesis is part of an integrated research program in progress at the University of Nebraska dealing with the mechanisms of addition, elimination, and substitution in α, β – unsaturated ketones and their halogen derivatives.

The essential scope of this research is the investigation of the mechanism(s) of substitution by amines on α – (bromomethyl)-chalcone.A knowledge of the mechanism(s) involved would be useful in elucidating some of the factors determining the structure of reaction products observed in other similar systems.

Advisor: Norman H. Cromwell

The Preparation Of 5-Arylazopyrimidines, Frederic Edwin Dutton

Masters Theses

Introduction

The synthesis of 5-arylazopyrimidines was undertaken in search of potential anticancer agents.

While many azo compounds have carcinogenic activity, it has been shown by several workers in this area that some 5-arylazopyrimidines have anticancer properties. S. Hibino(1) has shown that p-(2,4,6-triamino-5-pyrimidinylazo) benzene-sulfonic acid shows promise as an effective anticancer agent when used in conjunction with 6-mercaptopurine and adrenal steroidal hormones. When tested clinically, total remission of the leukemic process was achieved in 85.7% of the cases treated. In comparison, total remission was achieved in only 57.5% of the cases treated with a mixture of 6-MP and the hormone which …

Plant-Derived Pigments And Dyes Used By Artists, Samuel C. Rizzetta

Masters Theses

History

Uses of Biologically-derived Products in Painting

Throughout history man has relied heavily on plant-derived materials in the production of paintings. Plant products have been used to fulfill each of the material requirements of painting. The ground or surface upon which an artist applies paint -is usually of plant origin, such as woven fabrics and paper. The ancient Egyptians painted on canvas (from Linum usitatissimum L.), papyrus, (from Cyperus papyrus L.), and wood (Lucas, 1934:149-150, 201-203; Laurie, 1910:17, 31-32).

At the time of Theophilus leather parchment, preferably of horsehide, was popular for painting (Bazzi, 1960:13). After parchment, walls and wooden …