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Articles 68341 - 68370 of 69086

Full-Text Articles in Physical Sciences and Mathematics

Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden May 1946

Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden

Bachelors Theses and Reports, 1928 - 1970

This thesis has to do with a study of the produc­tion of talc in Montana, describing the local geology of each deposit, and a description of the laboratory tests that were made on various grades of Montana talc in an attempt to determine why some grades of talc can be burned in solid forms while others must be ground, mixed with a binder and molded.


The Electrodeposition Of Waxes From Emulsions, Richard Nebel Mar 1946

The Electrodeposition Of Waxes From Emulsions, Richard Nebel

Bachelors’ Theses

At the beginning of the nineteenth century, electrochemistry became an established part of the science of chemistry. Volta believed in the existence of some definite relationship between chemical and electrical phenomena and his investigations led to the discovery of a means of converting chemical energy to electrical energy. His observations became the foundation upon which all modern electrochemistry is based. Volta alternated zinc and silver disks with paper soaked in salt water between each disk. This afforded a source of electrical energy which produced a current and became to be known as the Voltaic-pile.


A Study Of Form And Content For A Laboratory Manual To Be Used By Students In General Chemistry Laboratory, Berne P. Broadbent Jan 1946

A Study Of Form And Content For A Laboratory Manual To Be Used By Students In General Chemistry Laboratory, Berne P. Broadbent

Theses and Dissertations

This investigation was carried out for general chemistry classes in which recitation and laboratory work are closely integrated and in which very close supervision is given to laboratory classes. Results indicate that there are fewer failures under these conditions if students do individual work. Students receiving grades of over 80% seem to work just as effectively in pairs as they do when working individually, but about 5% who fail when working in pairs could, apparently obtain grades above 60% if they did individual work. The formal full statement type of report is substantially more effective than the questionaire report as …


Thermochemical Studies Of Special Propellants., Frederick C. Damm Jan 1946

Thermochemical Studies Of Special Propellants., Frederick C. Damm

Electronic Theses and Dissertations

No abstract provided.


The Use Of Measurement To Determine The Condition Of Oysters In Virginia, Alice Elizabeth Overcash Jan 1946

The Use Of Measurement To Determine The Condition Of Oysters In Virginia, Alice Elizabeth Overcash

Dissertations, Theses, and Masters Projects

No abstract provided.


Permability And Porosity Of Devonian Dolomites In Northwestern Montana, Jack W. Nordquist Jun 1945

Permability And Porosity Of Devonian Dolomites In Northwestern Montana, Jack W. Nordquist

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to record data per­taining to porosity and permeability derived from physical tests performed on Devonian dolomites occurring in northwestern Montana, and to subsequently summarize the results obtained as an aid in determining the possibility of those dolomites being suitable reservoir rocks for oil and gas accumulation.


Vermiculite, Occurence, Character, And Concentration Of Mineral From The Pony District, Madison County, Montana, A. Saterdal Jun 1945

Vermiculite, Occurence, Character, And Concentration Of Mineral From The Pony District, Madison County, Montana, A. Saterdal

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to investigate the occurrence and character of the vermiculite deposits approximately four miles northwest of Pony; Madison County, Montana. The deposits are situated in rolling foothills at the northern end of the Tobacco Root Mountains.


The Preparation And Rate Of Hydrolysis Of Glucosides, Thomas William Fair Jun 1945

The Preparation And Rate Of Hydrolysis Of Glucosides, Thomas William Fair

Honors Theses

The term glucoside has been applied to those compounds which have the property of supplying, upon hydrolysis, a sugar and one or more other products. Nearly all organic compounds which occur in plants (fruit, bark, roots) are in combination with a sugar. They all resemble the simple methyl glucosides. In many cases, the glucoside form is more soluble than the substance itself. Naturally occurring glucosides are prepared by extracting from the plant, by means of a solvent such as water or alcohol. Glucosides are synthesized (generally) from the non-saccharide constituent and acetobromoglucose in the presence of AgO or Ag2CO3. The …


The Effect Of Chlorides Upon The Time Of Set Of Silicic Acid Gels, Leon F. Wardell Jun 1945

The Effect Of Chlorides Upon The Time Of Set Of Silicic Acid Gels, Leon F. Wardell

Honors Theses

The purpose of this research was to undertake the investigation of the effect of extra quantities of electrolytes, particularly those of divalent cations, upon the time of set of silicic acid gels, keeping in mind any effect the added electrolyte might have upon the solution's pH. The silicic acid gels studies were prepared by the method suggested by Hurd.


Malonic Acid Synthesis, Mary K. Hormuth Jun 1945

Malonic Acid Synthesis, Mary K. Hormuth

Bachelors’ Theses

The search for new organic compounds, the discovery of their proper­ ties and the utilization of them, both in the industrial and the biological field has always been the challenge to the organic and research chemist. In particular, the study of fatty acids and their related compounds has been the particular problem to not only the physiological chemist, but also the industrial chemist. The research in this direction has tremen­dous possibilities tor only the even carbon and normal chain acids have been isolated in nature. Here difficulty is often met when trying to establish and identify this type of acid …


Dielectric Properties Of Various Organic Compounds, Joyce Elaine Eiling Feb 1945

Dielectric Properties Of Various Organic Compounds, Joyce Elaine Eiling

Bachelors’ Theses

Condensers are widely used for many purposes. These devices are employed in one form or another in radio transmitting and allied industries such as television and amplifier circuits. They are used in automatic equipment, telephone, telegraph, and railway signal equipment as well as in condenser type motors. Condensers reduce sparking and arcing at contact relay points, switches, circuit breakers, time clocks, and thermostats. A vital part of a condenser is the dielectric. In present day condensers mineral oil is used extensively.

The purpose of this investigation is to study other organic compounds in an effort to find a good di …


The Cleavage Of Cyclo-Beta-Diketones. I. Tetramethyl-1,3-Cyclobutanedione. Ii. Tetraphenyl-1,3-Cyclobutanedione., Garry Carlton Kitchens Jan 1945

The Cleavage Of Cyclo-Beta-Diketones. I. Tetramethyl-1,3-Cyclobutanedione. Ii. Tetraphenyl-1,3-Cyclobutanedione., Garry Carlton Kitchens

LSU Historical Dissertations and Theses

No abstract provided.


Occupational Chemical Hazards In Industries Of Louisville And Jefferson County., Morgan Brown Lewman Jan 1945

Occupational Chemical Hazards In Industries Of Louisville And Jefferson County., Morgan Brown Lewman

Electronic Theses and Dissertations

The facts and conclusions presented in the following pages are the results of figures gathered during two and one half years of work as an Industrial Hygiene Engineer for the Louisville and Jefferson County Health Department. The factual information was acquired from many sources including extensive reading to which reference is made of the more recent publications in the bibliography and also from correspondence and discussions with authorities in various fields. Much data was gained from "in-service training" received at the United States Public Health Service; Bureau of Industrial Hygiene, Bethesda, Maryland; University of Michigan; National Conference of Governmental Industrial …


A Study Of Factors Influencing The Hydrolysis Of Corn Amylopectin By Barley Malt Enzymes., Thelma Munsey Back 1918-2006 Jan 1945

A Study Of Factors Influencing The Hydrolysis Of Corn Amylopectin By Barley Malt Enzymes., Thelma Munsey Back 1918-2006

Electronic Theses and Dissertations

No abstract provided.


Distribution Of The Fungus Lagenidium Callenectes Couch And Its Effect On Eggs Of The Blue Crab, Mary Rosalie Rogers Jan 1945

Distribution Of The Fungus Lagenidium Callenectes Couch And Its Effect On Eggs Of The Blue Crab, Mary Rosalie Rogers

Dissertations, Theses, and Masters Projects

No abstract provided.


An Investigation Of The Nature Of The Coefficients Of Entire Function, Marie Ann Philips Oct 1944

An Investigation Of The Nature Of The Coefficients Of Entire Function, Marie Ann Philips

Mathematics & Statistics ETDs

The purpose of this study is to investigate the nature of the coefficients of certain power series. In particular, it is desired to know what characteristics the coefficients must possess in order that the series shall represent an entire function.


The Solubility Of Zinc Ethyl Xanthate In Water, Thomas M. Mckenzie Oct 1944

The Solubility Of Zinc Ethyl Xanthate In Water, Thomas M. Mckenzie

Bachelors Theses and Reports, 1928 - 1970

A determination of the solubility of zinc ethyl xanthate was attempted by measuring the refractive index of a saturated solution of that salt. The small increment in refractive index effected by adding zinc ethyl xanthate to water in saturation quantities rendered measurements difficult and of dubious accuracy.


Hydrogen Overvoltage Of Cadmium Bismuth And Antimony Bismuth Alloys, Edwin W. Stevens Oct 1944

Hydrogen Overvoltage Of Cadmium Bismuth And Antimony Bismuth Alloys, Edwin W. Stevens

Bachelors Theses and Reports, 1928 - 1970

A method to measure hydrogen overvoltage was devel­oped and checked with metals of known overvoltage. Alloys of bismuth and antimony and of bismuth and cad­mium were prepared and their overvoltages determined.


The Electrodeposition Of Copper-Cobalt Alloys, Richard L. Dunn Oct 1944

The Electrodeposition Of Copper-Cobalt Alloys, Richard L. Dunn

Bachelors Theses and Reports, 1928 - 1970

An attempt was made to deposit a 50:50 copper-cobalt alloy from various sulfate electrolytes. No true 50:50 alloy was obtained but various mixtures of cobalt and copper rich crystals were deposited.


Synthesis Of Dyes, Faith B. Cramer Sep 1944

Synthesis Of Dyes, Faith B. Cramer

Chemistry Honors Papers

This 14 page thesis examines the classification and preparation of dyes.


Measurement Of Dielectric Constants, Francis Andrew Czech Jun 1944

Measurement Of Dielectric Constants, Francis Andrew Czech

Honors Theses

The increasing importance of a knowledge of dielectric constants of substances is shown by the large number of measurements that have appeared in recent literature- Several methods have been used in making these measurements, but probably the most precise ate the methods based on the heterodyne beat principle. This apparatus is designed to measure substances that are non-conducting. The condition of constant capacitance in the measuring circuit is the principle of the apparatus and is detected by the beat note between a fixed crystal radio frequency oscillator and oscillations generated by a variable oscillator. Otto and Wenzke (6) have used …


Synthesis Of Complexes Of Potassium Thiocyanate With Thiourea And Biurnet, Barclay Belding Fishburn Jun 1944

Synthesis Of Complexes Of Potassium Thiocyanate With Thiourea And Biurnet, Barclay Belding Fishburn

Honors Theses

The main objective of the work was an attempt to prepare certain compounds of the purine group for possible use in cardio-therapy, since the purine group is known to exert a stimulating action on the heart. However, under certain conditions these compounds cause a serious rise in blood pressure. It was thought that perhaps some compound which would produce dilation of the blood vessels could be combined with the purine group, to give a compound which would have the stimulative property, and in which the rise in blood pressure would be absent or at least minimized. Since such a type …


A Preliminary Polarographic Investigation Of Hydrogen Bonding - The Ortho- And Para- Hydroxy Benzaldehydes, Edwin Gerald Newstead Jun 1944

A Preliminary Polarographic Investigation Of Hydrogen Bonding - The Ortho- And Para- Hydroxy Benzaldehydes, Edwin Gerald Newstead

Honors Theses

The polagraphic method should be able to determine the presence of hydrogen bonds in ortho-hydroxy benzaldehyde in carefully buffered water solutions. The wave-height for the reduction of ortho-hydroxy benzaldehyde in acid solution is about one-half the height in basic solution. This would seem to indicate that the intermediate reduction product is formed by the reduction of ortho-hydroxy benzaldehyde in acid medium. This intermediate is stabilized by the presence of a hydrogen bond, so that further reduction to the hydroxy benzyl alcohol is not possible at the dropping mercury electrode.


Preparation Of Certain Purine Thiocyanate Complexes, Robert Wallace Carter Jun 1944

Preparation Of Certain Purine Thiocyanate Complexes, Robert Wallace Carter

Honors Theses

As the purine group of compounds is known to exert a stimulative effect on the heart, the object of this research was to prepare certain compounds of the purine group for possible use in cardiotherapy. However, a serious rise in blood pressure often accompanies the use of these compounds, it would be desirable to combine them with some compound which would dilate the blood vessels.


A Study Of Mixed Hydrogels Of Titania And Zirconia, James Borst Bouck Jun 1944

A Study Of Mixed Hydrogels Of Titania And Zirconia, James Borst Bouck

Honors Theses

Hydrogels of titania, formed by addition of bases to acid solutions of titanium salts, have been known since Rose's work in 1823. Hydrogels of zirconia have been prepared and investigated by several workers. These hydrogels of titania and zirconia are both acid gels, that is, they are formed at pH's considerably less than 7.


An Investigation Of The Reaction Of Bromopicrin With Liquid Ammonia, Seymour L. Meisel Jun 1944

An Investigation Of The Reaction Of Bromopicrin With Liquid Ammonia, Seymour L. Meisel

Honors Theses

The purpose of this research was to study the reaction between bromopicrin, also referred to as nitro-bromoform or tribromomonitromethane, with liquid ammonia. It seems surprising, but very little has been done on the reaction between these halogen nitro derivatives of methane and liquid ammonia.


The Relation Between Viscosity And Silica Concentration Of Silicic Acid Gels, Jules David Viglielmo Jun 1944

The Relation Between Viscosity And Silica Concentration Of Silicic Acid Gels, Jules David Viglielmo

Honors Theses

In this work we have again been concerned with the silica concentration but have elected to use viscosity measurements as a means of studying the process of gelation rather than the former method used by Hurd and Schaffer. As pointed out by Hurd and Santora, who use the viscometer in studying the effect of added electrolytes the process of gelation may in this way be observed.


A Study Of Some Dehydrating And Infiltrating Agents, Monica Hoefs May 1944

A Study Of Some Dehydrating And Infiltrating Agents, Monica Hoefs

Bachelors’ Theses

The ethyl-alcohol-xylol series produces a hardening and shrinking of the tissues. It has long been criticized for this reason.


Fluorite Near Silver Bow, Montana, Charles V. Campbell Feb 1944

Fluorite Near Silver Bow, Montana, Charles V. Campbell

Bachelors Theses and Reports, 1928 - 1970

The wartime demand for fluorspar has caused renewed interest in fluorite deposits. Near Silver Bow, Montana, a deposit of massive, coarsely crystalline fluorspar, which has not been described in the literature, has attracted the atten­tion of the United States Geological Survey.


The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty Feb 1944

The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to elucidate this phenomena of frother incompatibility, and to offer an explanation based upon several divergent lines of investigation. The research was limited to four common frothing agents, namely, pine oil, n-amyl alcohol, sodium oleate, and sodium lauryl sulphate (Dreft).