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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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).