Physical Sciences and Mathematics Commons^™

Influence Of Temperature And Acid On Time Of Set Of Silicic Acid Gels, Angelo J. Marotta

Honors Theses

The chief purpose of this research was to study the time of set of silicic acid gels produced by the reaction of phosphoric acid and sodium silicate solutions. The secondary purpose was to determine the hear of activation by means of the data procured through the main purpose. The times of set of these gels were measured at four different temperatures. The pH of each gel was measured also. The pH of the above mentioned gels ranged from a pH of 3 to a pH of 10.

The Effect Of The Change Of Ph During The Time Of Set, Upon The Time Of Set Of Silicic Acid Gels, Harris W. Paton

Honors Theses

The study of this particular subject was made in the hope that it might lead to a more complete explanation of the manner of setting of gels. It was thought that by changing the pH during the time of set irregularities in the course of the setting of the gel might be found. It was thought, for example, that there might be a period during which the addition might have less effect than average, or a period where it would have a much greater than average effect. These periods might possibly have occurred at any part of the time of …

Radioactive Properties Of The Subterranean Waters Of Ellis County, Kansas., Verne Lippert

Master's Theses

Soon after the discovery of Becquerel rays in 1896, tests were made on ordinary matter to see if all matter were radioactive. Although there is evidence to show that all matter is radioactive, to a degree and under certain conditions, it has been found that the greater part of the observable effect is due to traces of radioactive material permeating all matter in general. Thus, radium and its products being the most active of radioactive substances, the surface of the earth is covered with traces of these radioactive substances but the amount varies from place to place. Moreover, determinations of …

A Consideration Of The Cobalt Complexes, Jack Maloney

Chemistry Honors Papers

This 13 page thesis examines structural problems and preparation methods of complex cobalt compounds.

The Control Of The Grain Size Of Tin., Robert D. Macdonald

Bachelors Theses and Reports, 1928 - 1970

The tin alloys of tellurium are extremely hard and have very great tensile strength. It was thought that the reduction of the rate of grain growth of tin with the addition of tellurium accompanied this hardening and strengthening and such way found to be true.

The Presence Of Rhenium In Montana Manganese Ores., Henry E. Swanson

Bachelors Theses and Reports, 1928 - 1970

Rhenium properties offer many interesting possibilities, therefore any ores containing rhenium would be of considerable value. Its close relationship to manganese in the periodic table led to the belief that manganese ores would be an excellent place to search for the metal. Investigation of the literature of rhenium revealed that no ore was known to contain more than 0.001 per cent of rhenium.

The Inhibitory Effects Of Carbonaceous Materials On The Cyaniding Of Gold Ores., David Currie Jr.

Bachelors Theses and Reports, 1928 - 1970

Carbon and carbonaceous material have been known to have a deleterious effect upon the cyanidation of gold and silver ores since the very beginning of the process. Organic matter is a common source of impu­rities in cyanide solution, its reducing effect being notorious.

The Electrical Conductivity Of The Copper-Aluminum Alloys., William W. Hintalla

Bachelors Theses and Reports, 1928 - 1970

Among the many aluminum alloys which have been studied are the binary copper-aluminum alloys. These have proven to be among the most useful of the alumi­num alloys thus far worked upon.

The Electroplating Of Cadmium From Sulfate Solutions, Lewis S. Prater

Bachelors Theses and Reports, 1928 - 1970

It has been proven that cadmium forms a very satisfactory plate on steel, which has to withstand severe corrosion, especially the corrosion of sea water and spray. The metal is now successfully plated electrolytically from cyanide solutions, but wherever work is carried on with cyanide, there is great danger of poisoning to the workers.

The Effect Of Temperature On The Rate Of Dissolution Of Gold In Cyanide Solutions Which Have A Constant Oxygen Content., Robert Currie

Bachelors Theses and Reports, 1928 - 1970

Since the development of cyanidation into a highly efficient process for treating gold ores, many papers have been written on its various aspects. Although, there has been much work done on it, the chemistry of the reaction is not yet completely understood.

The Theory Of Determinants: Some Special Forms And Applications, William Ralph Eikelberger

Master's Theses

The theory of determinants is a relatively new branch of mathematics; it was not firmly established until a brief 200 years ago. It was not until the middle of the 18th century that Cramer, one of the independent discoverers of the fundamental idea, was fortunate enough to attract attention to the theory of determinants. Much of the literature is written on the assumption that its reader has a good background in the subject. Then other authors just give the fundamental properties of determinants without proof of their statements. These latter authors are not interested in the mathematical theory of determinants, …

The Electrowinning Of Copper From Roasted Sulphides, Thomas B. Linn

Bachelors Theses and Reports, 1928 - 1970

A hydrometallurgical process for the recovery of copper from flotation concentrates has long been con­sidered an attractive possibility. The object of such a method is to produce electrolytic copper without resorting to expensive matte smelting and converting.

Electrolytic Recovery Of Copper And Zinc From Brass, D. H. Swank

Bachelors Theses and Reports, 1928 - 1970

The purpose of this research was to continue the work of Thomas Parker, who worked on the recovery of copper and zinc from brass during the school year l934 - 1935. Since there is such a wide variety of brasses made with usually a third alloying constituent, remelt­ed scrap is suitable only for castings of wide tolerance in specifications.

Envelope Curve, Gladys Catherine Apel

Bachelors’ Theses

The theory of motion led three great mathematicians of the seventeenth century into the study of the envelope of a moving line. It was introduced by Christian Huygens, further developed by Ehrenfried Walther von Tschirnhausen, and carefully analyzed by Gottfried Wilhelm Leibniz.

A Study Of The Equilibria Between Bentonite And The Various Replacing Agents In Alcoholic And Water Solutions, Joel E. Fletcher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigators in soils have long recognized the importance of the colloidal fraction of soil, and also the almost inseparable problem of replaceable bases. It is generally accepted that the replaceable base fraction of a colloid controls to a large degree the physical properties exhibited by it. Volumes of work have been written on the problem of controlling the reactions of this fraction and on studies of the properties exhibited by it when it is saturated with various cations. Each worker has proceeded in his own individual way or followed the example set by some previous worker with specific modifications.

Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher

Bachelors Theses and Reports, 1928 - 1970

The Tuxedo mining district lies fifteen miles west of Butte on the south east end of Deer Lodge valley. Prospecting and mining has been carried on in this district for about 20 years. As a result many pits have been dug, several adits have been driven, and two or three shallow shafts have been sunk.

The Deposition Of Monomolecular Films., Albert Wilbur Schlechten

Bachelors Theses and Reports, 1928 - 1970

The formation of monomolecular films is possible because of the action of the heteropolar molecules of certain fatty acids, especially stearic. Under the proper conditions the acid will spread out until a monomolecular film is formed.

Nickel And Its Determination, Robert Fitzpatrick

Bachelors’ Theses

I have found great pleasure in writing this thesis on Nickel and wish to express my appreciation for the assis­tance received from various sources. The thesis itself contains a brief history of the metal followed by an experi­mental determination of the nickel content of some commer­cial steels. These were kindly furnished by the analytical department of the International Harvester Company to whom I am grateful.

For the history of nickel I am especially indebted to the account by Robert c. Stanley, President of the Inter­national Nickel Company, reproduced in Wilhelm's, The Book of Metals.

For the material on the …

Educative Value And Construction Of Laboratory Equipment For Physics, With Emphasis On An Optical Screen, Warren D. Conrad

Bachelors’ Theses

In the preparation of this thesis the writer has constantly kept in mind three distinct purposes: a) to show the place and importance of the lecture-demonstration in the teaching of physics; b) to provide the teacher of physics in the small high school a means whereby he may equip a laboratory at the smallest possible cost; and c) to describe in detail the construction of an optical screen for purposes of demonstration, indicating what can be done. in the building of home-made physics apparatus.

A Comparison Between The Percent Of Maltose Sugar In The Malt Wort And The Characteristics Of The Malt, William Black

Bachelors’ Theses

Interest in this problem was brought about through working with malt in a malting laboratory. The curiosity of the author prompted research along the lines herein explained and a correlation between the amount of maltose in a malt wort and other variable factors explained in the following chapters was sought.

There has been a great deal of work done in the malting field which adapts itself readily to organic research. The chemistry of malt and malt products has arrived at a state where regular standard analysis can be applied. However, the research possibilities are practically unlimited and this work done …

Operational Characteristics Of The Differential Dynamometer: Conductometric Titrations, Raymond Joseph Melchione

Master's Theses

No abstract provided.

Studies On The Clarification Of Cane Juices In Louisiana., Subba M. R Rao

LSU Historical Dissertations and Theses

No abstract provided.

Preparation And Properties Of Alpha Nitrogen Derivatives Of Furan., Henry Marvin Singleton

LSU Historical Dissertations and Theses

No abstract provided.

Some Reactions Of Creatinine With Certain Aliphatic Halogen Derivatives, Howard Edwards Wright Jr

Master's Theses

The object of this investigation is to prepare some derivatives of creatinine from certain aliphatic halogen compounds with emphasis on the nature of the reactions through which condensation takes place.

Singular Solutions Of Differential Equations, John E. Klest

Master's Theses

No abstract provided.

A Study Of Methods For The Recovery Of Silver, Bromine, Iodine, And Sodium Thiosulfate From Used Photographic Fixing Baths, Leroy Agustave Bay

Masters Theses

"Sodium thiosulfate was one of the pioneer reagents used in photography, and is still the most important reagent used in photographic fixing. The solubility of the silver halides in an excess of sodium thiosulfate makes it important as a reagent for removing the undeveloped silver halides from the film. The life of a fixing bath is controlled by the halogen content. As the ratio of halogens to sodium thiosulfate is increased, the time required for fixing is also increased until the ratio reaches such a point that fogging of the film results. Most of the solutions are discarded long before …

A Biochemical Study Of Colloidal Sulfur., Gertrude L. Hendershot

Electronic Theses and Dissertations

No abstract provided.

Cleavage By Organic Magnesium Compounds., Maxwell Mcclelland Barnett

LSU Historical Dissertations and Theses

No abstract provided.

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

LSU Historical Dissertations and Theses

No abstract provided.

The Effect Of Cultivation On Certain Chemical And Physical Properties Of Some South Dakota Soils, Oscar E. Olson

Electronic Theses and Dissertations

Soil Nutrient losses have followed closely in the paths of advancing frontiers in agriculture. Remedies for depletion as the result of overcropping were sought by George Washington, whose interest and investigation of soil nutrient losses probably represent the earliest attention given to land exploitation in the United States, which at the present time has become a problem of national concern. Soil losses have been attributed to a number of causes , among which are cropping, erosion, leaching, burning, and rapid oxidation of organic matter in the soil. Associated with soil nutrient losses, certain significant physical and chemical changes may occur …