Digital Commons Network^™

A Study Of The Factors Which Influence Selectivity In Liquid Extraction., Robert Christie Binning

LSU Historical Dissertations and Theses

No abstract provided.

The Reaction Of Diphenylketenephenylimine And Phenyl-Lithium. Part I. The Bromo-2-Nitro-Benzoic Acids. Part Ii., Tillman Rupert Pullig

LSU Historical Dissertations and Theses

No abstract provided.

Acetic-Oxalic Anhydride. Part I. A Study Of Some N-Alkyl-Cyclohexylcarbinols. Part Ii., Walter Maurey Henley

LSU Historical Dissertations and Theses

No abstract provided.

Studies Of Electrochemical Polarization In Liquids Of Several Ranges Of Conductivity., John Allen Rider

LSU Historical Dissertations and Theses

No abstract provided.

The Spotted Horse Coal Field, Sheridan And Campbell Counties, Wyoming., Wilds W. Olive

LSU Historical Dissertations and Theses

No abstract provided.

A Study Of Immiscibility In The Carbonates From The Metamorphic Rocks Of Southeastern Vermont, Ralph D. Cotter

Masters Theses

"This problem is an attempt to correlate grade of metamorphism (normally assumed to be temperature dependent) with the shape and dimensions of a solid miscibility gap. Such a correlation might permit mapping of a continuously variable function of metamorphism. The system, calcite and dolomite-ankerite, was chosen for study because of its relative simplicity. Samples of quartz-carbonate granulite were collected from the Waits River formation in southeastern Vermont through a range of metamorphic grades. Refractive index, "molecular" volume, manganese content, and density were determined for the carbonates of four of these samples. These values are plotted on a compositional diagram to …

The Effect Of Cross-Linkage On Internal Diffusion In Dowex-50 Ion Exchange Resin, John Paul Peterson Jr.

University of the Pacific Theses and Dissertations

As far back as the time of Aristotle sand filters were used to purify water. However it was not until the time of Thompson and Way (1848), two English agricultural chemists, that the idea of actual exchange of ions was proposed. Ion exchange has been investigated extensively, resulting in applications to softening of water, purification of sugar, separation of compounds, recovery of metals, many pharmaceutical separations and many others.

It has been proposed that the internal diffusion should be related to the internal structure of the ion exchange resin. The object of this research was to measure the internal diffusion …

A Study Of The Kinetics And The Free Radicals Involved In The Low-Pressure, Vapor-Phase Pyrolysis Of Toluene, Robert E. Williams

Chemistry and Chemical Biology ETDs

The separation of lanthanum, yttrium, and the rare earth elements from their ores has been a challenge to the chemist for many years. The similarities in chemical properties has made their separation a problem of extraordinary difficulty. Fractional crystallization has been the classical method utilized in the past, although individual elements have been isolated by oxidization or reduction to other than the tripositive oxidation state (1). Recently ion exchange and solvent extraction methods have become more important as a means of separation of these elements. Both of these techniques depend upon fractional differences in the distribution of compounds or ions …

The Separation Of Antimony 125 From Solutions Of Neutron Irradiated Tin Salts, Joseph D. Robinson

Chemistry and Chemical Biology ETDs

Because of the importance of high specific activities of radioactive species considerable experimental work has been done on the preparation of "carrier-free" tracers. In surveying the literature on the preparation of carrier-free antimony only one method was found. The method reported involves the deuteron bombardment of tin; solution of the target in agua regia; addition of cadmium carrier; precipitation of the cadmium as the sulfide which carries antimony, using oxalate ion to complex the tin; solution to the sulfides of cadmium and antimony in concentrated hydrochloric acid; distillation of tin from cadmium and antimony contained in in perchloric acid with …

Polargraphic Measurement Of Reaction Rates Of Diazonium Salts, Gregory W. Daues

Chemistry and Chemical Biology ETDs

If a colorimetric method is used for following the reactions by tracing the increase in dye concentration, only reactions which form soluble dyes can be studied. Gasometric techniques are limited in that a sample must be removed from the reaction vessel and the diazonium salt decomposed by means of a catalyst in order to measure the liberated nitrogen. The latter method of analysis lends itself more readily to studies of the rate of decomposition of diazonium salts under various conditions, such as, the presence of ultra-violet light or exposure to high temperatures.

Collector-Depressant Equilibria For The Flotation System Potassium Ethyl Xanthate-Potassium Cyanide-Molybdenite, Connell Bolton Roberts

Theses and Dissertations

This dissertation involves a study of the collector-depressant equilibria of the flotation system potassium ethyl xanthate-potassium cyanide-molybdenite, based upon mineral-air bubble contact measurements made by a modified captive bubble technique. The Cook theory of single site free acid adsorption is used to interpret the data. The standard free energies of adsorption of ethyl xanthic acid and hydrocyanic acid on molybdenite are calculated.

Thermodynamic Properties Of Water Absorbed On Silica, Conrad V. Hatch

Theses and Dissertations

The object of the work presented in this thesis was to obtain quantitative values of the thermodynamic changes in water upon adsorption by silica. Two methods were used. The first was a determination of the differential entropy and heat of adsorption independent of any theory of adsorption. The second method included a new interpretation of the "c" constant of the Brunauer, Emmett, and Teller Theory in which c was expressed in terms of the standard free energy of adsorption. The experimental data gave satisfactory results in determining the differential heat and entropy of adsorption. The results obtained in determining the …

The Kinetics Of The Exchange Between Diiodotyrosine And Iodine, Alfred H. Zeltzmann

Chemistry and Chemical Biology ETDs

The rate of exchange of iodine with diiodotyrosine in squamous solution was studied as a function of the concentrations of both reactants, of the pH, and of the temperature. The concentration of diiodotyrosine was varied from 0.0000475 to 0.01251 moles per liter and that of the iodine from 0.0000103 to 0.000395 moles per liter. The upper limits of concentration studied were determined by the solubilities of both the iodine and diiodotyrosine. The ratio of concentration of diiodotyrosine to that of iodine was varied from 227 to 0.5, the temperature was varied from 25.1° C to 42.1° C, and the pH …

Geology Of Santa Ana Mesa And Adjoining Areas, Sandoval County, New Mexico, Paul E. Soister

Earth and Planetary Sciences ETDs

The foremost purpose of this report is to outline the general geology and geomorphology of the mapped area. Secondarily, the relationship of the Santa Fe formation of late Tertiary age to older strata is explored. Presence of basalts and other volcanics in the Santa Fe formation is shown. Evidence indicating the probable contemporaneity of part of the Chicoma volcanic group and of the Santa Fe formation is discussed.

Plenoaste Crystals From An Olivian Basalt, Caballo Mountains, New Mexico, Charles Maxwell

Earth and Planetary Sciences ETDs

The thesis area lies along the eastern base of North Ridge which forms the northern part of the Caballo Mountains. This ridge rises abruptly, about 1,500 feet, above the considerably dissected lowland on which the area is located. The lowland lies near the head of Mescal Canyon and is dissected into the ridges and valley with a relief as much as 300 feet. The drainage is east and north into Mescal Canyon (Pl.2) which joins the Rio Grande just below Elephant Butte Dam.

The Separation Of Ethylene Diamine, Morpholine, And M-Toluidine By Means Of Paper Chromatography, Domenick S. Bruno

Bachelors’ Theses

"No other discovery has exerted as great an influence and widened the .field of investigation of the organic chemist as much as Tswett's discovery. or Chromatographic Adsorption Analysis 1n 1906".

In 1910 Tswett's comprehensive work "Chromophylls in the Plant and Animal World" was published. Tswett's fundamental experiments consisted or extracting the color from dried leaves with petroleum ether. He poured the extract through a compressed column or finely powdered calcium carbonate. The column was attached to a filter flask and the solution drawn through. He found that the apparently homogeneous pigment separated into colored bands along the column as the …

Collector-Depressant Equilibria In The Flotation Of Molybdenite, Robert Létrenne Andelin

Theses and Dissertations

This dissertation presents the results of research on the flotation system potassium n-amyl xanthate - sodium sulfide - molybdenite. The purposes of the research were (1) to determine the theoretical collector-depressant equilibria conditions of this system necessary for the flotation or depression of molybdenite, (2) to ascertain the mechanism of adsorption or the collector potassium n-amyl xanthate and the depressant sodium sulfide on molybdenite, and (3) to calculate the standard free energy of adsorption on molybdenite of the collector and depressant in this system. To accomplish these purposes it was necessary to develop a satisfactory experimental method for the controlled …

Jade: Its Occurrences, Mineralogy, Geology, Uses And Technology, Robert L. Borton

Earth and Planetary Sciences ETDs

No abstract provided.

Protective Refractory Coatings On Titanium Metal, Eugene F. Gibbs

Bachelors Theses and Reports, 1928 - 1970

The problem undertaken in this thesis concerns the development of a newer phase of metallurgy, namely the adaption of the strong, lightweight metal titanium to high-temperature uses. The primary objective of the investigation is to determine wheth­er the application of refractory coatings to titanium will pro­tect the metal from chemical reactions and corrosion at high temperatures.

The Teaching Of Science, Sherwin Maeser

Faculty Honor Lectures

Like to teach! Whether with the expectant, half-frightened freshman, the senior, worried about his preparation now that . he must get out and meet competition, or the graduate student interested in new discoveries, I like to work with all of them.

I have been teaching a long time now. As has always been the case when one generation is thinking of turning over its work to the next, I am glad to have the opportunity to talk about some of the things that I consider important in this job of teaching.

The most varied and the most acute problems of …

Geology Of The Sierra De Santa Rita, Zacatecas, Mexico, Zoltan Decserna

Earth and Planetary Sciences ETDs

Information concerning the southern extent of the Mexican geosyncline was desired with the mapping of Sierra de Santa Rita, near Concepción del Oro, Zacatecas, in northern Mexico. Three Upper Jurassic and six Cretaceous formations were mapped, within which lithology and changes in thickness do not reflect proximity of this area to ancient shore lines. The first description of the Huizachal formation in northern Zacatecas is given.

The Study Of An Unusual Augite Near Cabezon Peak, Sandoval County, New Mexico, George Brunton

Earth and Planetary Sciences ETDs

When the writer was examining some of the volcanic plugs near Cabezon, New Mexico in the spring of 1951, he discovered in Plug No. 5 (Pl. 2, D.W. Johnson, 1907) some unusual, large vitreous inclusions.

Further Studies Of The Reactions Of Quinoxaline And 2-Methylquinoxaline, Marcus N. Myers

Theses and Dissertations

The present investigation was also made with the object of preparing the vinylquinoxalines and studying their 1,4- addition reactions. The attempts to prepare vinylquinoxalines were unsuccessful. However, sodium acetylide reacted with 2,3-dichloroquinoxaline to give a new compound which (from its analysis and properties) appears to be 2,3-bis(1-hydroxyethyl) quinoxaline . This new compound should be investigated further , as it may prove to be an intermediate in the preparation of vinylquinoxalines. The preparation of 2-methylquinoxaline has become very simple by the use of the method of Jones, Kornfeld and McLaughlin^5, which consists of condensing o-phenylenediamine with pyruvic aldehyde. The condensation of …

A Statistical Review Of 436 Submucous Resections With Post-Operative Results Of 338 Cases, D. Wilson Hales

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

A Study Of The Exchange Between P-Nitrobenzyl Iodide And Iodide Ion In Alcoholic Solutions, E. Lee Purlee

Chemistry and Chemical Biology ETDs

The recent work of Stillson concerning the kinetics of exchange between benzyl iodide and iodide ion in various solvents has given impetus to the investigation of similar exchanges with substituted benzyl iodide.

A Linear Polymer X-Ray Scattering Model, Bernard Cohen

Masters Theses

"In the development of X-ray scattering intensity curves physical models are necessary for the theoretical mathematical development involved. The purpose of this paper is the development of a physical model suitable for X-ray diffraction analysis or a linear polymer.

X-ray intensity patterns may be used to give a greater insight as to the atomic structure, configuration or atoms, molecular weight, and therefore a greater knowledge of the structure of matter, both microscopic and macroscopic. The converse may sometimes be used. An atom or molecular model is constructed, from this model X-ray scattering curves may be derived. These curves may be …

The Fluorescence Of Uranium In Solid Solution, Robert Emmett Kelly

Masters Theses

"The fluorescence of uranium finds its greatest application in the so-called "bead test" which is a method of qualitative analysis. In the form of a bead, the uranium is in solid solution, and if the proper chemical solvent is used, the bead will fluoresce under ultraviolet radiation.

In the systematic separation of the metallic elements, uranium is associated with the aluminum group in that it is not precipitated by hydrogen sulfide in 0.3 N H ion but is precipitated by ammonium hydroxide and ammonium sulfide. In the analytical scheme, uranium acts like beryllium. This process of detection is sometimes tedious …

A Necessary And Sufficient Condition That A Set Be Homeomorphic To A Plane Region Bounded By A Finite Number Of Nonintersecting Circles., Robert Lloyd Broussard

LSU Historical Dissertations and Theses

No abstract provided.

Effect Of Fire On Forest Soils In The Pine Barren Region Of New Jersey, Paul Yoder Burns

Yale School of the Environment Bulletin Series

No abstract provided.

Halogenated Epoxide-Phenol Reactions A Mechanism Study, Richard L. Rowton

Masters Theses

"The object of this investigation was to study the reactions of two other halogenated epoxides--namely, 3-bromo-1,2-epoxybutane and l-bromo-2,3-epoxybutane--with the phenolate ion, with the hope that the results obtained would shed additional light upon the mechanisms of such reactions. At the present time, no direct practical applications of the results can be forseen. However, the information gained will be a worthwhile addition to the vast existing store of knowledge already at our disposal, and might be of some help to future investigators"--Introduction, page 2.