Physical Sciences and Mathematics Commons^™

An Attempt To Correlate Certain Physical And Chemical Properties Of Various Commercial Animal Glues, Robert C. Andersen

Bachelors’ Theses

The manufacture and use of glue involves many important industries, and up to recent times we, in America, have lost much by our old "rule of thumb" and traditional methods for testing glues. In recent times much work has been done on a strictly scientific basis to explain the actions of glue from both a colloidal and a physicochemical aspect.

This thesis is concerned in particular with the possibility of coordinating the different properties exhibited by the accepted glue tests so that a definite criterion might be postulated for a high-grade animal glue. This task, however, proved extremely difficult, for …

Fermentation Of Sugar Acids By Bacteria, Gordon B. Robbins, Keith H. Lewis

Chemistry Department: Faculty Publications

Bacterial fermentation of the sugar acids has received little attention in comparison with the wide-spread use of the common aldoses and sugar alcohols. These acids, and especially their sodium salts, are well suited to bacteriological techniques because of their solubility and heat stability, yet their usefulness for investigating the relationship of chemical structure to biological utilization has only recently been recognized. Their application to systematic differentiation of bacteria has also been neglected.

Kendall, Bly and Haner (1923) concluded from a study of three monocarboxylic acids and three dicarboxylic acids that these compounds possessed little value for the differentiation of bacterial …

A Comparative Study Of The Proteolytic Activity Of Trypsin On Various Gelatins, Louis Hinkle Coggs

Bachelors’ Theses

Since 1839, the viscosity of liquids has been measured by means of capillary tubes. However, it was not until the year 1846, that the results of Poiaeu1lle's research were :made known to the public. Because of the comprehensiveness of Poiseuille's work, the concept of the laws controlling viscometry flow is attributed to him. For one hundred rears the subject of viscometry has been studied by many. During these years the principle a propounded by Poiseuille have been verified in general, but various corrections and modifications of viscometers in regard to drainage, surface tension, liquid head, and kinetic energy have been …

A Study Of The Temperature Of The Vapor Above A Boiling Salt Solution, John Andrew Palm

Honors Theses

The results obtained with the apparatus seemed to be quite conclusive that the temperature of the vapor above a boiling salt solution is the same as the temperature of the pure solvent.

Studies On Silicic Acid Gels: Measurements On Surface Tension During Setting, Louis Werthman

Honors Theses

In this paper, results will be presented to show the change in surface tension during gelation of silicic acid solution. This research was undertaken with the belief that the change in surface tension during gelation might give further insight into the process of gel formation.

The Regulation Of Silicic Acid Gels, Louis W. Thompson Jr

Honors Theses

The discovery of Hurd and Griffith, that a silicic acid gel will regel after breaking up and washing, is not true thixotropy, but it would be of interest to study this. This paper is concerned with just this matter, the regulation of silicic acid gels.

The Relation Between The Concentration Of Silica And Time Of Set At Constant Ph, Howard Sheffer

Honors Theses

Silicic acid gels result from practically any sol of hydrated silica, merely with the lapse of time. The gel must, however, contain a large enough concentration of silica to give sufficient strength or rigidity for the gel to set. A sol which contains less than .5 percent SiO2 will give a very weak gel, or no gel at all. Sols which are strongly alkaline will not set at all.

The Formation Of Silicic Acid Gels In Very Strongly Acid Solutions, Raymond William Barclay

Honors Theses

In the past few years much work has been done at Union College in attempting to determine the mechanism of the setting of silicic acid gels. All of this work, however, had been done in alkaline, weakly acid, or moderately acid solutions, and practically no investigation of silicic acid gels in very strongly acid solutions has been made. The purpose of this research was to undertake such an investigation The effect of temperature and pH upon the time of set was studies. Three different temperatures were used, and the pH of all gels are studied was below 1. Concentrated hydrochloric …

Gels Of Hydrated Titanium Dioxide, David Wright Godfrey

Honors Theses

In 1823, Rose (1) reported the preparation of a week structured titania jelly by the treatment if fusion of sodium carbonate and titanium dioxide wit hydrochloric acid. In 1938, Jacober (3) prepared weak titania jellies by a method similar to that used by Klosky and Marzano. Furthering this previous research, Jacober went on to demonstrate that titanium, as might be expected from its close similarity to silicon and its position in the same periodic family, shows a linear relation between the reciprocal of absolute temperature and the logarithm of the time of set of its gels, as silicon does.

Heats Of Solution In Liquid Ammonia, Herbert F. Zuhr

Honors Theses

This paper will present the heat of solution of methyl ammonium chloride as a function of the concentration at -33 degrees. The heats of other amine and imine hydrochlorides, organic salts will also be included, as will the preparation of certain organic salts and calibration data.

The Determination, Analysis, Or Assay Of Sodium Nitrite, William Ellenbogen

Chemistry Honors Papers

This five page thesis examines the determination of sodium nitrite through volumetric and gravimetric analyses.

Heats Of Solution In Liquid Ammonia, Joseph Sottysiak

Honors Theses

Water, chemically speaking, is the most important individual substance known. Water occupies an outstanding position among solvents. In its capacity as a solvent for salts and as an ionizing agent, it is in a class by itself. Of all known liquids, ammonia most closely resembles water in those properties which make water outstanding among solvents. As a solvent, ammonia is secondary to water, however; many salts insoluble in water dissolve readily in liquid ammonia. Solutions of salts in liquid ammonia are excellent conductors of electricity. Ammonia unites with salts to form ammonia of crystallization. It solvates ions. It is an …

A Preparation And Testing Of Bromo Acid, Joseph M. Jauquet

Bachelors’ Theses

The study of dyes in relation to the cosmetic industry is of very great theoretical and practical interest. The development of the Dye Bromo Acid-G and the products which are produced from it are of foremost achievement in the field of modern industrial chemistry.

The Kolbe Synthesis With Alkyl Ortho-Xenols, Sidney Harris

Master's Theses

The phenol series of compounds has shown marked therapeutic activity. Generally there are two types phenols used as germicides and fungicides - (a) the very soluble type such as the resorcinols and ( b) the less soluble type such as the phenyl phenols and salicylic acid and its derivatives.

Condensation Of Olefins With P-Mercapto-Diphenyl, Raymond Michael Abrams

Master's Theses

Markownikow's rule states that in the addition to unsaturated ,negative groups add to the carbon atom having the least number of Hydrogen atoms. It has been observed that mercaptans and hydrogen sulfide add to olefine contrary to Markownikow's rule in the presence of sodium alcoholates or sulfuric acid.

The Solubility Of Anthracene And Phenanthrene In Various Solvents As A Function Of Temperature, R. O. Sutherland, A. J. Miller

Journal of the Minnesota Academy of Science

No abstract provided.

The Pressing Need Of A Practical Non-Technical Course In High School Chemistry, P. M. Glasoe

Journal of the Minnesota Academy of Science

No abstract provided.

The Adsorption Of Hydrogen Ion Upon Arsenic Trisulfide Hydrosols Preceding Coagulation, Myron L. Corrin

Bachelors’ Theses

Since the recognition of the colloidal state by Graham in 1861, the importance of colloidal systems in both pure and applied science has received increasing recognition. Many industrial processes are colloidal in nature; the chemistry of living matter is essentially colloidal chemistry; analytical chemistry involves the recognition and removal of matter in the colloidal state. As a result of the many applications of this branch of chemistry, the mechanisms underlying typical processes of colloidal systems are of vital significance. Specifically, the destruction of colloidal systems by electrolytes, finding as it does such wide use, is of considerable importance. In the …

The Lime Content Of Rocks Of The Upper Cretaceous System Of Osborne County, Kansas, Herman D. Search

Master's Theses

This report is the result of several weeks of intensive study and investigation in the field and in the laboratory. In making this study of the rocks of Osborne County, Kansas, the writer is concerned chiefly with the chemistry of the rooks rather than with their geological formation. He has not attempted to make a complete analysis of the rocks, but has limited his investigation in order to determine certain facts concerning their line content. He has attempted to determine the consistency of the percentage of lime in a given member in various parts of the county and also of …

A Study Of Methods Available For The Measurement Of The Conductivity Of Electrolytes Including A New Procedure Involving Electrodeless Determinations, Clyde Aubrey Crowley

Dissertations

No abstract provided.

The Application Of A Photronic Nephelometer In The Determination Of Calcium, A.M. Gross

Master's Theses

No abstract provided.

The Fixation Of Active Nitrogen By Organic Compounds, F. Russell Koppa

Master's Theses

No abstract provided.

The Refractive Indices Of Ethyl Alcohol And Water Mixtures, Janina Nowakowska

Master's Theses

No abstract provided.

The Reactions Of Acid Halides With Sodium, Magnesium, Zinc And Amalgams, William H. Webb

Masters Theses

"The reactions of acid halides with metals are of interest because there seems to be a possibility of abstracting the halogens from two molecules of the halide, and thereby bringing about a coupling reaction; or the formation of an intermediate organo-metallic compound which would react with another molecule of the acid halide. The result of these reactions should be the formation of diacetyl and acetyl chloride and of dibenzoyl or benzil from benzoyl chloride. This procedure would be far better than the usual procedures for the preparation of these compounds...The results reported in the literature by different workers, on the …

Oxidation Potentials Of Ferric Ammonium Citrate., Daniel P. Knopf 1916-1991

Electronic Theses and Dissertations

No abstract provided.

Chemical Substitutes., Clarence Elmore Parks 1909-1987

Electronic Theses and Dissertations

No abstract provided.

On The Viscosity Of Silicic Acid Gel Mixtures, Arthur Charles Santora

Honors Theses

This thesis contains the results of experiments which were formulated with a view to ascertain the applicability of the viscometer in studying the process of gelation and also effect of electrolytes on the viscosity of gel-forming mixtures.

The Hydrolysis Of Ethyl Orthosilicate And Preparation Of Silicic Acid Gels From It, Matthew Woodrow Wilson

Honors Theses

Ethyl orthosilicate, (C2H5O)4Si, the ester of orthosilicic acid and ethyl alcohol, is a colorless liquid boiling at 165° C. It can be hydrolyzed to produce what is known as a hydrated silica sol or a sol of condensed silicic acid and ethyl alcohol; and under suitable conditions the hydrated silica sol or condensed silicic acid sol can be made to form a gel. It was decided to study the rates of the hy­drolysis and gel formation.

We have thus two reactions to be studied: 1. Eteyl orthosilicate + water ► silicic acid or condensed silicic acid + ethyl alcohol. 2. …

Time Of Set And Ph In Silicic Acid Gels, E August Laurence

Honors Theses

The purpose of this investigation was to determine the time of set and the hydrogen ion concentration of a silicic acid gel, basic in nature. A gel prepared from a mixture of 1.2511 normal sodium silicate solution and 1.0158 normal ammonium chloride was used for this purpose. The possibility of measuring the hydrogen ion concentration by the indicator method was used with considerable success by Prasad and Halliangadi (1). Previous work on this problem at Union by Marotta (2) pointed out the uncertainty of the glass electrode method due to the effect of the silicate on the electrode. The possibility …

The Surface Tension Of Ethylene Glycol With Various Additions, Walter W. Eichenberger

Bachelors’ Theses

Ethylene glycol is a compound of great interest both from a practical and theoretical viewpoint. In its properties it lies midway between ethyl alcohol and glycerol. Several years ago this substance was a scientific curiosity and was produced solely by laboratory methods. At that time it had little commercial value principally because of its scar• city. However, the demand for glycol steadily rose after its many useful properties had become known until today it is a very common chemical staple. Such uses as in a non-freezing dynamite, as an anti-freeze for automobile cooling systems, as a hygrosoopic agent, as a …