Chemistry Commons^™

Determination Of Saponification Rate By Change In Hydrogen Ion Concentration Measured With Quinhydrone And Glass Electrodes, Richard Porter

Bachelors’ Theses

The measurement or hydrogen ion concentration is becoming more important in all the fields of chemistry since the states or many chemical systems can to some extent be defined by their hydrogen ion concentration. If the hydrogen ion concentration or a particular solution can be measured accurately, in many cases other important relations and quantities may be determined. Methods or measurement are therefore important instruments or investigation.

When an ester is saponified by an alkali, the hydrogen ion concentration increases as the reaction proceeds. Thus, it the hydrogen ion concentration can be calculated at different intervals of time, some knowledge …

The Kinetics Of The Exchange Between Sn(Ii) And Sn(Iv) In Absolute Alcohol, E. Gerald Meyer

Chemistry and Chemical Biology ETDs

The radiochemical exchange reaction may in general be written AX+BX^• = +BX where X^• represents a radioactive atom of X. The species AX and AX^• are assumed to be chemically identical as are the species BX and BX^•. This assumption introduces no appreciable error even when working with atoms having an atomic weight as low as fourteen.

An Analytical Study Of Berberine, W. Riley Mcgaughran

Chemistry and Chemical Biology ETDs

Berberine, an alkaloid, has unique pharmacological properties as well as unusual chemical and physical characteristics. This compound has been used for many years as a remedy for eye diseases. In contrast to most alkaloids, berberine hydroxide is more soluble than its salts. Its chemical structure has been established, but a correlations of many of its properties and its structures has not been made.

The purpose of this work was to undertake an analytical study of berberine, hoping to collect data which would make possible the correlation of certain properties of the compound with its structure. The study was planned to …

A Study Of The Use Of The Dicyanatodipyridine (Ii) Complex For The Determination Of Cyanate, Jean Mcclelland

Chemistry and Chemical Biology ETDs

Treadwell states in his text, Analytical Chemistry, Volume II, that "the only method for examining cyanates consists in determining the amount of carbon and nitrogen present by combustion." A review of the available literature shows that, although this is not literally true, a procedure for this quantitative determination of small amounts of cyanates in the presence of interfering substances is lacking.

A survey of the literature yielded few references for instrumental methods for the quantitative determination of cyanates. Ripan-Tilici published a method for the determination of cyanates poteniometrically, but attempts to duplicate her work have failed. Madame Tilici, in …

The Syntheses And Ultraviolet Absorption Spectra Of 2-Imidazolines, 2-Imidazolidones And Imidazolidines, Robert J. Ferm

Chemistry and Chemical Biology ETDs

The first method used to prepare 2-imidazolines was through the reaction of aromatic aldehydes with ammonia. Amarin, which is known as 2,4,5-triphenyl-2-imidazoline, was the first compound reported to be prepared in this manner. This type of reaction has since been widely studied 2,3,4,5,6 in connection with the preparation of 2,4,5-triarylimidazolines. Furfural and ammonia have also been reported to react in a similar manner. Amarin has also been obtained from the reaction of a mixture of benzil, ammonia, and benzaldehyde.

The Preparation And Properties Of Aromatic Ditellurides, Roger Sanftner

Chemistry and Chemical Biology ETDs

It has been shown that tellurium tetrachloride combines additively with aliphatic others yielding hygroscopic compounds of the type R2O•TeCl4, but with mixed ethers, containing both alkyl and aryl radicals, substitution takes place with the elimination of hydrogen chloride.

The Chelation Of Praseodymium As A Function Of Ph Using Thenolytrifluoroacetone, Thomas K. Keenan

Chemistry and Chemical Biology ETDs

The rare earth elements, including elements 57 through 71, provide many diverse series of studies through their chemical reactions. In as much as these elements are all in Group III of the periodic table, they are markedly similar in their properties. The separation, insulation and purification of the various rare earths from one another has long been a problem of great interest to the chemist. All of these elements show a principle valence of plus three. Cerium has a well-defined plus four state, stable in aqueous solution and europium forms a stable, insoluable divalent sulfate. Those two exceptions, however, are …

A Study Of The Intermediary Products Formed During The Life Of A Copper Cyanide Plating Bath, Matthew E. Carlisle

Chemistry and Chemical Biology ETDs

Four aims of a study of cyanide baths were:

1. To study the intermediate products formed during the operation of plating and stripping baths under various conditions.

2. To identify these intermediate products or complexes and to determine whether or not they caused the failure of the bath.

3. To consider the conditions that caused a bath to fail, and to be able thereby to increase the life of the bath.

4. To develop a fast, accurate method for controlling the baths, preferably by means of the cyanide content.

A Study Of Magnesium Silicate As A Base Matrix Material For Fluorescent Materials, John D. Hopperton

Chemistry and Chemical Biology ETDs

Luminescent materials have come into wide and important use within the past ten years in such equipments as the fluorescent lamp, and the cathode ray television tube. Because of this wide interest and usage, there has been made a concentrated search for ever brighter luminescent materials. It has also been of importance to produce and investigate materials which would produce as a wide range of colors under excitation as possible.

Synthesis Of Imidazolines, Diazepines, Triazepines And Imidazolidones From A 1, 2-Diamine And 1, 1-Dicarboxylic Esters, Irwin J. Pachter

Chemistry and Chemical Biology ETDs

In 1884 Freund (1) heated a mixture of malonic ester and ethylenediamine and obtained a product which dried to give a high melting powder. He named the compound ethylenemalonamide and attributed a seven-membered ring structure to it.

A Study Of The Transparency Of Paraffin Wax, Gordon B. Smith

Bachelors’ Theses

The problem of wax transparency with which this thesis is concerned interested the author as a result of past experience with a bakery firm. The practical application of a positive solution to this problem would be as a competitor of cellophane, that is, transparent paraffin used for commercial wax paper would combine the quality of keeping bakery goods fresh with the display value of cellophane.

Public Water Supplies Of New Mexico, Kenneth F. Priest

Chemistry and Chemical Biology ETDs

Distribution of population in State. The estimated population for the State of New Mexico for the year 1930 was 423,300. A close observation of the population centers shows them to be scattered over a wide range of territory. The largest city, Albuquerque, has approximately 26,000 citizens. The next sites, according to the 1930 count, are three in number, Santa Fe, Roswell, and Clovis. The remaining population including rural districts do not number over eight thousand people.

A Chemical And Biological Study Of The Waters Of Elephant Butte Reservoir As Related To Fish Culture, John Greenbank

Chemistry and Chemical Biology ETDs

The investigation of fresh-water lakes with respect to fish and other aquatic life had its beginning in Europe in the latter half of the nineteenth century. Probably the only man who may be considered to be the founder of the science of limnology was F. A. Forel, of the University of Lausanne Switzerland. Professor Forel’s work was the start of a rapidly developing branch of study, not only in Europe, but also presently in North America.

The Development Of Colloid Chemistry, Oscar A. Bouise

Electronic Theses and Dissertations

At first, it was as a blur, that had shrouded a great mystery for ages and ages, until some seventy odd years ago. Then came Thomas Graham, who could not satisfy himself with merely viewing a blur as a blur. Being a scientist, he applied his mind experimentally, which the keen precision of any of the eminent astronomers using a telescope, and viewed more clearly this mist which hovered above the horizon.

The Throwing Power In Chromium Plating, Samuel F. Gerstein

Bachelors’ Theses

In chromium plating, it is very difficult to get a continuous deposit of chromium of uniform properties upon irregularly shaped articles and especially upon those having deep recesses. the nature, cause, and methods on improvement of this poor throwing power will be treated.

The Effect Of Various Waxes On The Rate Of Evaporation Of Light Naphtha, Juel Osmund Severson

Bachelors’ Theses

Solids dissolved in a liquid produce a general decrease in the evaporation rate of the solvent. Experiments were performed, using light naphtha as the solvent and Paraffin, Japan, Carnauba, Candelilla, Ozokerite, Montan, and Bees waxes as solutes. These waxes were selected since they are the waxes most commonly used in the manufacture of floor waxes and work of the kind presented in this thesis finds its greatest application in connection with that industry.

The Chemical And Physical Examination Of The Oils From The Seeds Of The Aster, Bachelor's Button, Larkspur, Muskmelon, Okra, Pansy, Snapdragon, Henry Neal Marsh

Archived Theses and Dissertations

No abstract provided.