Physical Sciences and Mathematics Commons^™

A Kinetic Study Of A Homogeneous, Unimolecular Gaseous Decomposition Reaction., Harold Arthur Frediani

LSU Historical Dissertations and Theses

No abstract provided.

Cellulose And Its Derivatives., Otis Willard Murray

Dissertations, Theses, and Masters Projects

No abstract provided.

Pyrochemical Changes In Missouri Halloysite, Frank Joseph Zvanut

Doctoral Dissertations

"For centuries it has been known that the application of heat to a clay or a clay body produces changes that make it an entirely different substance from the original raw clay. Ever since the earliest civilizations produced crude building brick by baking formed clay bodies in the sun's rays, mankind has been speculating on the nature of the changes that convert soft, friable, plastic clays into hard, strong, non-plastic, rock-like masses. It has been only within the last two decades, however, that progress has been made in the solution of problems dealing with the resultant products in fired clay …

The Preparation And Properties Of Diphenylthiocarbazone, Floyd C. Mcintire

Theses and Dissertations

At present the chemical literature offers no method for the preparation of diphenylthiocarbazone, or dithizone, sufficiently detailed to guide the average laboratory technician in an economical and successful preparation of this compound. The high price of dithizone and the limited number of dispensers of it emphasize the need of such a method. The original research reported in this thesis was done primarily in an attempt to formulate a satisfactory detailed method for the preparation of dithizone. The suggestions of Emil Fischer were followed and an attampt was made to improve his outline and to note the possible errors so that …

Effect Of Salts On The Setting Time Of Silicic Acid Gels, Gustav F. Hallstrom

Honors Theses

It has been stated by Prasad and Hattiangadi (1) that the process of setting of mixtures of solutions of sodium silicate and acetic acid consists of three stages: (a) The formation of silicic acid by the interaction of the acid with sodium silicate (b) The formation of the colloidal solution of silicic acid (c) The coagulation of the colloidal solution by the electrolytes liberated in the first reaction The present investigation was undertaken with a view to examine the effect produced on the time of setting of the silicic acid gels by the addition of extra quantities of electrolytes to …

Influence Of Temperature And Acid On Time And Set Of Silicic Acid Gels, Kenneth Jacob Frederick

Honors Theses

The underlying purpose of this research was to gain a further insight into the mechanism of the setting of silicic acid gels. The primary purpose, however, was to study the effect upon the heat of activation of the substitution of the weak acids, heretofore used almost entirely in the work done at Union College on these gels, by certain strong acids. The acids employed in this research were hydrochloric, nitric and sulphuric. Several gels were prepared from a standard silicate solution and each of these acids. Measurements of the time of set and pH were taken for each gel. Four …

Heats Of Solution In Liquid Ammonia, Herman Dettbarn Kluge

Honors Theses

Liquid ammonia in many of its reactions and properties stimulates water. Next to water liquid ammonia is the best known electrolytic solvent. It dissolves a large number of salts to form, in general, conducting solutions, in which the ions are more mobile. Dilution Curve. The heat of dilutes is plotted against the change in the moles of ammonia. The curves approach a constant value which is the heat of dilution. These curves were plotted to compare the heat of dilution of ammonia chloride and ammonium bromide.

Time Of Set Of Silicic Acid Gels, Michael Priznar

Honors Theses

The purpose of this work is to study the time of set of silicic acid gels as a function of the temperature. All data are confined entirely to acid gels made by mixing sodium silicate and an acid.

Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert E. Russell

Honors Theses

During the studies made on the structure of silicic acid gels, several theories of gel formation have been proposed. The theory at present under consideration has to do with the polymerization of the molecule H2SiO3 into some of structure, most probably due to the splitting out of water molecules as is indicated.

The Vitamin D And Provitamin D Content Of Some Varieties Of Utah Wheat, Harold M. Nielsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cereal grains were known to be notably deficient in the anti-rachitic principle even before the discovery of vitamin D. Clinicians had associated a type of rickets of infancy, characterized by an over-weight, flabby, bowlegged condition, with a diet consisting mainly of cereals. Mellanby (1) in 1921 concluded that this type of rickets is induced by overfeeding with carbohydrates. He also showed in the same report, however, that oatmeal, although it contains less carbohydrates than the other grains tested, possesses a special tendency toward rachitogenesis.

The Influence Of Ph On The Activity Of Trypsin And Papain (Caroid) As Measured By A Modification Of The Northrup Gravimetric Casein Method, Frank W. Dragan

Bachelors’ Theses

Hydrogen ion concentrations have long been recognized as an essential factor in many biochemical processes.

The influence of hydrogen ion concentration upon enzyme activity has been of especial importance as proteolytic enzymes are rapidly gaining in use in various industries, principally the tanning industry.

Ua37/23 Whas Broadcast No. 31, Whas, Western Kentucky University, Earl Moore

WKU Archives Records

Script for weekly WKU broadcast on WHAS radio. This show included Kelly Thompson, Norma Lagura, C.P. McNally, Karl Beyer, Virginia Fortenberry, Helen Albritton, Paul McDaniel and B.T. Towery.

A Study Of Certain Physical And Chemical Effects Of Aromatic Halides, Unsaturated Carboxylic Acids, Saturated Ketohydroxy Acids, And Saturated Ketone Alcohols Upon Hydrocarbon Oils, Clyde Aubrey Crowley

Master's Theses

No abstract provided.

A Study Of The Oxidation Of Aqueous Sulfide Solutions By Chlorine., Lester Cole Faulkenberry

LSU Historical Dissertations and Theses

No abstract provided.

Nuclear Chemistry, J. William Buchta

Journal of the Minnesota Academy of Science

No abstract provided.

An Investigation Into The Bromate Method Of Manganese Determination, Ray A. Bunday

Electronic Theses and Dissertations

Throughout the history of research in the science of Chemistry the problem of the quantitative determination of manganese has always been a perplexing one. The results have usually fallen short of the theoretical value and has necessitated the application of an empirical factor(1) which is always undesirable to the true research scientist, if not to the commercial analyst.

The Anti-Oxidant Influence Of Phenol-Formaldehyde Resins On The Drying Of Linseed Oil., Walter William Rinne 1909-1974

Electronic Theses and Dissertations

No abstract provided.

Explosive Property Of Aluminum Powder Liquid Oxygen Mixture, David S. Bruce

University of the Pacific Theses and Dissertations

The purpose of this investigation was to determine the optimum conditions for explosion of a mixture of aluminum powder and liquid oxygen when fired without the use of a fixed detonator.

A Study Of Furoyl Chloride., Luella Shehan

Electronic Theses and Dissertations

No abstract provided.

Semi-Commercial Distillation Of Ternary Mixtures : Paper I. Glycerin-Ethyl Alcohol-Water, Rochus Cornelius Stahl

Electronic Theses and Dissertations

No abstract provided.

A Review Of The Bromination Of Intermediate Compounds In The Preparation Of 4 - Bromo - 2 - Sulphimide Benzoic Acid And The Preparation Of 4 - Iodo - 2 - Sulphimide Benzoic Acid., Robert E. Johnson

Electronic Theses and Dissertations

No abstract provided.

The Determination Of The Deuterium Oxide Content Of Various Samples Of Water, Douglas R. Macintyre

University of the Pacific Theses and Dissertations

The purpose of this investigation was to determine the deuterium oxide content of various samples of water by a precise and sensitive method based upon the compressibility of water. These samples were gathered from as many different locations as were deemed necessary.

A Study Of The Products Of The Reaction Between Stannous And Arsenate Ions In Silicic Acid Gels, Frank K. Thompson

University of the Pacific Theses and Dissertations

The fact that characteristic crystalline products result upon the diffusion of arsenate ions into silicic acid gel which has been impregnated with stannous ions has been known by the Pacific Chemistry Department for some time. The optimum conditions with regards to heat and hydrogen ion concentration have been determined. The purpose of this investigation was to study the products of the reaction. First to determine whether or not the silicic acid itself combined with the stannous and arsenate. ions in the formation of the crystalline product, and second to determine its chemical composition.

A Study Of Methods Of Determining The Rate Of Acid Hydrolysis Of Wheat Gluten, Angus V. Honrickson

University of the Pacific Theses and Dissertations

Because of the nutritious value of sodium glutamate and its meat-like flavor, which is very pleasing to most people, and hence its demand if it were properly promoted, and because of the abundance of protein in accessible form for its manufacture, it is only reasonable to assume that if the optimum conditions of protein hydrolysis were found, the manufacturing could be made a highly successful enterprise. it was the purpose of this research to investigate the methods by which the hydrolysis of wheat glutes can do conveniently followed in order to determine the efficiency of reactions run under specific conditions.

The Lime Content Of Rocks Of The Upper Cretaceous System Of Ellis County, Kansas, G. Lawrence Rarick

Master's Theses

The report which is being submitted here is the result of several weeks of field and laboratory work investigating the rocks of the Upper Cretaceous System of Ellis County, Kansas. The writer has attempted to consider the subject primarily from a chemical viewpoint although much of the background for the work has been of a geological nature. There has been no attempt to give a complete chemical analysis of the rocks of the Upper Cretaceous System, but rather a more or less thorough analysis in regard to the percentage of lime that the rocks of the various formations and members …

Comparison Of Hydrogen Ion Concentration Results In Silicic Acid Gel Mixtures By Different Methods, Edward David Luneburg

Honors Theses

Since a conclusive theory of the structure of gels has not been presented yet, it is still necessary to obtain as much data about gels as possible, in the hope that the assembled data will lead to a theory which will explain all the known facts. Thus, the effect of such factors as temperature, concentration of acis and the addition of indicators were studied. Also, the change of the properties of viscosity and conductivity during the time of set were studied.

Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert Louie Slobod

Honors Theses

In the course of the investigation that has been conducted at Union College by Prof. Charles B. Hurd and his student assistants, it was soon found that something more accurate than the Wheatstone bridge would have to be used in measuring the electrical conductivity of gels. This becomes evident if we consider that in such studies we encounter the measurement of very small changes in the total resistance, changes of the order of one or two parts in twenty thousand. Accordingly, a modification of the Carey Foster bridge was developed for this work.

Migration Of Ions Through Silicic Acid Gels, Richard Edward Davies

Honors Theses

Ever since Liesegane (1), rediscovered the phenomenon of rhythmic precipitation first due to Runge (2), the colloid chemists have been using their ingenuity in attempts to explain the factors responsible for the formation of Liesegang rings. The theories resulting from such investigation have not been entirely satisfactory. In recent years the problem has been taken up by the students of waye mechanics in hope of conquering that which has so far defined the chemists. It is hoped that by continuing the work of Bieleski (3) and Rothemich (4) with the probing electrode, one of the many theories concerning the phenomenon …

The Effect Of Sodium Fluoride On The Bright Plating Range Of Chromium, Ernst Curschmann

Bachelors’ Theses

Chromium is used very extensively at the present time as an exterior plate over other metals. It has found favor not only because of its brilliant blue, untarnishable lustre, but also because of its extreme hardness. The great increase in the demand for chromium plate in recent years, rapidly relegating nickel plate into the background, has resulted in increased research and experimentation .in the field of chromium plating, in the endeavor to provide a lasting, beautiful plate at a minimum of expense.

Present chromium plating baths containing sulphuric acid as the active agent of deposition leave much to be desired …

Chemical And Physical Considerations Of Carbohydrates, Flora Cooke

Chemistry Honors Papers

This 13 page thesis examines chemical and physical considerations of carbohydrates.