Physical Sciences and Mathematics Commons^™

An Investigation Of The Isotopic Exchange Of Arsenic Atoms Between Arsenic(Iii) And Arsenic(V) In Aqueous Hydrochloric Acid Solutions, Lewis L. Anderson

Chemistry and Chemical Biology ETDs

A spectrophotometric investigation was initiated in order to provide additional evidence for the existence of chemically nonequivalent species of arsenic(V) in 10.9 f hydrochloric acid solution.

Operational Characteristics Of A Fission Gas Detector, Raymond Curtis Lee

Doctoral Dissertations

Introduction: One of the major problems associated with the operation of nuclear reactors is the radioactivity hazard caused by the release of fission products from the fuel. In a solid-fuel reactor, the uranium is usually present in an allow or in the form of UO₂, either in the pure state or mixed with other oxides which improve the thermal and mechanical properties of the material. As the fuel material undergoes fission in the reactor, radioactive fission products are produced. If they were not prevented from doing so, these fission products would diffuse out of the fuel material, enter …

Synthesis Of Hemimellitine, James Jacob Nigriny

Honors Theses

The purpose of this work is the synthesis of hemimellitine or 1, 2, 3 - trimethyl benzene. After library research (done mostly by John Peeling, Union '61) and with the assistance of Dr. Howard Sheffer, two pathways to hemimellitine were devised. Throughout the course of this project the lack of known compounds with which to compare intermediate products has presented difficulties in the identification of the intermediate products. However, the procedure followed here, i.e. using two different pathways to the same and product with some intermediates the same in both, has enabled us to compare the similar intermediates for identification …

Preparation Of 1, 2, 3-Trimethylbenzene, John Horace Peeling

Honors Theses

The purpose of this project is the synthesis 1, 2, 3-trimethylbenzene or hemimellitene as an intermediate for further research. The synthesis was carried out using two different approaches.

Phase Diagram Of The Solid-Liquid System 1-Methylnaphthalene--2-Methylnaphthalene, Michael Allan Schroeder

Honors Theses

The subject of this paper is the freezing point-composition diagram of the system 1-methylnapthalene--2-methylnaphthalene. The reason for writing this paper was that it was felt the resulting phase diagram might be of use in the separation of mixtures of the two components, since they frequently occur together in petrolem, and the preparation of 2-methylnapthalene by Friedel-Crafts alkylation also results in the formation of some l-methylnaphthalene. Also, it was felt that it would be of interest to determine the phase diagram for a system of two compounds as similar as these.

Experiments In General Chemistry, John Howard Adams

Honors Theses

The investigations described here in are concerned with several problems. The original investigation dealt with a common qualitative test for the presence of cobalt ion. The test involves the use of alcoholic ammonium thiocyanate which results in the formation of the unstable blue complexion Co(SCN)4.

The Detection Of Pesticide Residues In Water Supplies, David Lee Barry

Honors Theses

The use of organic chemicals as pesticides has increased greatly in recent years and continues to do so, since these pesticides offer advantages of greater effectiveness, more selectivity, and lower toxicity to mammals, than the previously used inorganic pesticides, such as arsenic compounds. The problem of pollution of water supplies by these pesticides becomes more important with this increasing usage, and with the increasing pressures on our water resources. Pesticides may find their way into water supplies by various means, such as runoff of rain water from crop land or other pesticide-treated land, direct application to bodies of water, for …

Synthesis And Analyses Of Kau(Cn)4, Henry K. Lutz

Honors Theses

In recent years many investigators have sought to measure the rate of exchange between two different oxidation states of an element in aqueous solution. The results of such studies often lead to a clearer understanding of the intermediate steps of the chemical reactions of ions of elements. Sunce much of the chemistry of gold is insufficiently understoof, it seems desireable to look for a measurable rate of exchange between the various oxidation states of this element.

Determination Of Pesticide Residues In Water, Jerry Lee Thurston

Honors Theses

To find a rapid qualitative test to detect organic pesticides in water, the following method is proposed: 1. Extraction of the pesticide from water by use of an organic solvent 2. Use of gas chromatography with a collection to separate the pesticide from other substances soluble in the solvent 3. Use of an infrared spectrum for identification of the pesticide.

The Reaction Of N, N-Disubstituted Ketohydrazones With Lead Tetraacetate, Elisabeth Cerda

Masters Theses

Introduction

The reaction of lead tetraacetate with compounds of the following general structure (not able to enter here) was first reported by Iffland and Criner (12). In the case of ketoximes (A = oxygern), a nitrosoacetate was produced which was oxidized to the more stable acetoxy-nitrocompound as follows: (not able to enter here)

The generality of the reaction was established by preparation of a series of acetoxy-nitrocompounds from alicyclic and aliphatic ketoximes. The apparently similar reaction of cyclohexanonephenylhydrazone (A = N-¢) with lead tetraacetate was reported, but the reaction product was not identified.

Phase Equilibria In Fused Salt Systems: Binary Systems Of Plutonium(Iii) Chloride With The Chlorides Of Magnesium, Calcium Strontium, And Barium, Karl W. R. Johnson

Chemistry and Chemical Biology ETDs

Fused salt systems containing oxides have received the most attention to date, because of their occurrence in minerals and ores and their application to ceramics. The next most widely studied of group of compounds are the metal halides, particularly the metal chlorides. Despite the fact that many of the metal chlorides are hygroscopic, the salts lend themselves to experimentation because a large majority undergo stable solid-liquid transformations below 1000 degrees C, are generally ionic, and are relatively non-corrosive.

Experimental Studies Of The Visible Absorption Spectrum Of Titanium (Iii) Acetylacetonate In Solutions And Rigid Glasses, Arthur L. Langhorst Jr.

Chemistry and Chemical Biology ETDs

Titanium (III) acetylacetonate was synthesized and the visible absorption spectrum was measured. A prominent absorption band, ^ymax at approximately 6000 was found with molar absorption coefficient of ~1000. The spectrum was investigated at temperatures ranging from 25 degrees C to 77 degrees K. At 7 7 degrees K the band was resolved into five well defined peaks at 4750, 5100, 5520, 5950 and 6460. An apparatus for obtaining spectrophotometric measurements of solution and rigid glasses was designed and fabricated.

The Synthesis Of Potential Antitumor Compounds, Duane L. Aldous

Chemistry and Chemical Biology ETDs

The antitumor activity found in such ring systems as the purine, pyrazolo [3,4-d] pyrimidine, and the 8-azapurine prompted the preparation of the imidazo [4,5-d] pyridazine ring system. Castle and Seese were one of the first to study this ring system. 4-Aminoimidazo[4,5-d]pyridazine possessed some anitumor activity. This antitumor activity suggested the preparation of the 4,7-disubstituted-aminoimidazo{4,5-d]pyridazines reported here. The antileukemic activity reported for 6-purinethiol led to the synthesis of several 4- and/or 7-mono-and disubstitutedthioimidazo[4,5-d]pyridazines.

Spectroscopic Studies Of The Luminescences Of Rare Earth Chelates, Ruth Elaine Whan

Chemistry and Chemical Biology ETDs

A variety of lanthanide chelates were prepared for preliminary luminescence studies under excitation by ultraviolet light. From these, chelates of benzoylacetone, dibenzoylmethane, tribenzoylmethane, and 8-hydroxyquinoline were selected for more extensive investigation. Energies of the lowest excited singlet and triplet states of the chelates were determined. Average values of 24,500 cm^-1 and 20,500 cm^-1 respectively were obtained for the dibenzoylmethides and 24,400 cm^-1 and 21,450 cm^-1 for the benzoylacetonates. Only small variations of a few hundred wavenumbers in the positions of the excited states were found as the chelated ion was varied.

Polarographic Investigation Of An Unusual Contaminant In Trichlorobiphenyl, Henry Michael Stahr

Honors Theses

An interest in polarography of organic compounds developed because of the need for an instrumental technique to determine unstable chlorine compounds in askarels used in the electrical industry for dielectric fluids. A chance contamination of trichlorobiphenyl used to impregnate capacitors caused the electrical industry untimely failures in their devices in 1956. These compounds break down under the influence of heat and electrical stress to form a buildup of conducting species which ultimately cause capacitors to fail. (1) Several test methods have been developed,( 2) all of which involve anionic hydrolysis of the unstable compounds and a potentiometric titration of the …

Sedimentation And Diffusion Coefficients Of Legoglobin Fractions, Alfonso R. Trujillo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The preparation of root nodule extract by Virtanen, et. al., has created a good deal of interest in the study of plant hemoglobin (legoglobin). In the preparation of any new substances, it is of interest to determine the physical constants of the new species.

The Effect Of Moisture And Temperature On Transformation Of Applied Ammonium Sulfate In Several Western Soils, Lloyd Richard Hossner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The conversion of ammonia nitrogen to nitrite and nitrate forms of nitrogen has aroused much attention in the past and continues to receive much of the energy of the present day researcher.

Phosphorus Status Of Genola Soils In Utah, Warren E. Bendixen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With increasing pressure on economical production of crops, more fertilizers are being applied to the soil each year to increase crop yields. Economical production of crops with applications of fertilizer requires an evaluation of the essential elements of the various crops so applications of fertilizer will not exceed the law of diminishing returns.

Because varying soil, moisture, and climatic conditions influence the response to added fertilizers, some workers (18, 26, 38) have contended that the only reliable way of determining the fertilization needs of a crop is to conduct a trial on the particular farm. The length of time involved …

The Mineral Content Of Various Sections Of Some Plants As Influenced By Conditions Associated With Lime-Induced Chlorosis, Hyrum Del Var Petersen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The so-called "lime-induced" chlorosis has been recognized for many years as a problem where plants are grown on calcareous soils. The characteristics associated with lime-induced chlorosis are the same as those associated with iron deficiency chlorosis--interveinal yellowing of the leaves at the meristemic region combined with reduced vigor of the plant as a whole. Lime-induced chlorosis is unique in that the iron content of both chlorotic plant and the soil do not always show a deficiency in iron when chemically analyzed. This leads to the theory that iron is inactivated in both the soil and plant.

Although no single factor …

Analysis Of Scintillation Pulse Shapes For Stilbene Using Neutron And Gamma-Ray Excitation, Roland Lee Bowles

Master's Theses

In experimental nuclear physics it is often desirable to detect neutrons in the presence of a heavy gemna-ray background. This situation presents a problem since neutron counters also respond to gamma radiation. However, recently it has been shown that the scintillation counter employing an organic crystal scintillator and pulse-shape discrimination may well furnish the solution to this problem.

Polysubstituted Piperazinethiocarboxamides, Donald W. Kreh

Master's Theses

Thiourea and its derivatives have found wide application in dyes, photographic film, elastomers, plastics and textiles. Certain thioureas possess biological properties and considerable work has been done in this area. The historical portion of this paper is divided into biological and non-biological properties of thioureas. In the literature search, primary importance was given to the biological properties of thioureas. The objective of the experimental work was to prepare compounds having potential pharmacological activity and to determine the physical constants of these compounds.

Determination Of The Ionization Potential Of Argon, Francis A. Brhely

Bachelors’ Theses

The introduction and discussion of a gas filled thyratron, with data and graphs determining the ionization potential of argon.

The Control Of Grasses With Chemicals, G R W Meadly

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

GRASSES are among man's greatest assets and usually he tries to encourage their growth.

The cereals, rice and many other grasses supply him with basic items of food and they are also important components of pastures which provide grazing for sheep and cattle.

Citrus Growers : Don't Blow Up Your Colouring Rooms, Department Of Agriculture, Western Australia

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

THERE have been several dangerous incidents associated with the use of acetylene in citrus colouring chambers recently, and growers are warned to take care when using this explosive gas.

Copper Minerals For Fertilizer Use, R N. Glencross

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

COPPER fertilizers have an important role in maintaining: and increasing Western Australia's agricultural production.

On many soils they are essential for cereal growing or pasture production and persistence and for animal health and wool quality.

They are also sometimes used for fruit trees, vines, and vegetables.

Coordination Of 2, 8- Bishydroxymethyl - 2, Elements Of The First Transition Series, Charles Edward O'Rear

Master's Theses

The preparation and study of 2, 8-bishydroxymethyl-2, 8-dimethyl-3, 7-diaza-1,5,9-nonanetriol with ions of the first transition series have been investigated. Spectrophotometric studies of solutions of this compound with Cu(II) and Ni(II) ions gave evidence of the formation of complexes containing one mole of ligand per metal ion throughout a wide pH range. The Cu(II) complex, the yellow colored Fe(III) complex formed at high pH, and the light blue colored Ni(II) complex have remained stable over several months. The red colored Ni(II) complex changes slowly into a more stable greenish-yellow complex. The ligand formed weaker complexes with Co(II) and Mn(II). Data from …

An Investigation Of The Analysis Of Turpentine By Gas Chromatography, John R. Wagner

Master's Theses

The development of gas chromatography and the publication of data on terpene analysis by this method has lead to this attempt to analyze turpentine by gas chromatography. The work has been limited to Gum Spirits of Turpentine and Steam Distilled Wood Turpentine since these are of chief importance and are the only types commonly retailed in small packages.

There have been three objectives:

1. To develop a method based on gas chromatography for distinguishing between Steam Distilled Wood Turpentine and Gum Spirits of Turpentine, and detection of mixtures and adulteration.

2. To identify as many components of the two turpentines …

An Experimental Investigation Of Coloring Matter In Canna Indica Flowers, James Clinton Vogt

University of the Pacific Theses and Dissertations

The research was carried out for the purpose of isolating and identifying the coloring matter in flowers of the canna indica (canna lily) variety. It was done by extracting the pigment from flower petals with methanol, amyl alcohol, and other solvents, and crystallizing the pigment as a salt. Physical properties such as solubility, color reactions, spectra and others were examined for this pigment. Chemical properties and degradation products were also examined in order to identify the chemical structure of the pigment.

A Kinetic Study Of The Base Catalyzed Esterification Of Propionic Anhydride With Isopropyl And N-Propyl Alcohols Using A High Frequency Oscillometer, Carl Joel Abraham

University of the Pacific Theses and Dissertations

The purpose of this research project is to investigate the base catalyzed reaction of propionic anhydride with n-propyl and isopropyl alcohols using a high frequency (120 megacycles) oscillometer to follow the course of the reaction as it proceeds.

The high frequency oscillometer has been used for many types of analytical determinations, and a review of the work up to 1957 is available in a publication by E. H. Sargent Company. The oscillometer has found application in titrations (Hall 1952), analysis of binary systems (Thomas, Faegin, and Wilson 1951) , static ternary systems (West, Robickaus, and Burkhalter 1951) , the study …

Minor Elements Can Be Overdone, L T. Jones

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

T H E term "minor elements" which is now commonly used and well understood by farmers and gardeners, refers to the five essential plant foods—copper, zinc, manganese, molybdenum and boron.

These five essential plant foods are needed by all plants in minute quantities and it is relatively easy to use them in excess of actual requirements or even in toxic amounts.

In practice this is not usually a problem with cereals and pastures. The important exception is when zinc alone is added to a cereal crop low in copper and the extra zinc accentuates the copper deficiency, and poorer yields …