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Articles 12661 - 12690 of 12778
Full-Text Articles in Entire DC Network
Synthesis Of Tetrafluoborobenzoquinone, Clyde W. Hussmann
Synthesis Of Tetrafluoborobenzoquinone, Clyde W. Hussmann
Bachelors’ Theses
This the sis is directed toward.a introducing the reader to the most recent advances in fluorine chemistry by briefly outlining the techniques and procedures thus far used in the synthesizing fluoroorganic compounds, and also the technical and physical limitations in using various types of fluorinating agents.
The reader will be introduced to a new form of synthesis whereby fluorine can be added to the aromatic nucleus of organic compounds that are of the hydroquinone and benzoquinone structure. The fluorine of such an addition will be part of the fluoborate radical. It is hoped that such an approach as the benzoquinone-fluoboric …
Physical Properties Of The Ternary System: Ethylene Glycol - Disthylene Glycol - Water, Robert Marvin Tombaugh
Physical Properties Of The Ternary System: Ethylene Glycol - Disthylene Glycol - Water, Robert Marvin Tombaugh
Master's Theses or Doctor of Nursing Practice
Since approximately two-thirds (12) of the energy from the fuel in automobile engines is converted to unusable heat, it is necessary that a method of cooling the engines be provided. In most present-day engines of this type, an indirect method is utilized, namely, the transfer of heat to a liquid and thence from the liquid to the surrounding air by means of radiators Water is universally used for the coolant liquid because of its availability and high heat transfer properties. However, water has its limitations. A significant limitation of water as a coolant is its corrosive action causing rust clogging …
The Synthesis And Insecticidal Activity Of Some Halogenated Aromatic Ethers., Tien-Chih Chen
The Synthesis And Insecticidal Activity Of Some Halogenated Aromatic Ethers., Tien-Chih Chen
LSU Historical Dissertations and Theses
No abstract provided.
The Determination Of The Solubility Of Hafnium Oxide In Aqueous Solution By The Radioactive Tracer Technique, Hampden O. Banks
The Determination Of The Solubility Of Hafnium Oxide In Aqueous Solution By The Radioactive Tracer Technique, Hampden O. Banks
Masters Theses
"To date, there is no information in the open literature concerning the solubility of hafnium oxide in water other than the fact that it is very insoluble. This lack of experimental information is due, partly, to the fact that hafnium is a relatively new addition to the list of known elements"--Introduction, page 1.
A Study Of Aldehyde Derivatives Of Metallic Sulfamates, Edmond A. Morin
A Study Of Aldehyde Derivatives Of Metallic Sulfamates, Edmond A. Morin
Master's Theses or Doctor of Nursing Practice
Sulfamic acid at one time had no particular value, and very little was known about the physical and chemical properties of this acid. At the present time , however, this acid is a commercial product of considerable importance and extensive investigation has been conducted to discover its many chemical properties. A very interesting group of compounds derived from sulfamates are the aldehyde addition products. The aldehyde derivatives of calcium sulfamate were studied and had a particular interest because of their greater stability, especially in the isolated, solid form. The aldehyde addition products of calcium studied included benzaldehyde, furfuraldehyde, for aldehyde, …
Qualitative Reactions Of Chlorine On Titaniferous Slags At Elevated Temperatures Without The Use Of Catalysts, Richard K. Brehm
Qualitative Reactions Of Chlorine On Titaniferous Slags At Elevated Temperatures Without The Use Of Catalysts, Richard K. Brehm
Bachelors’ Theses
For the past twenty-five centuries man's mastery of nature has been based largely on his ability to produce and work iron into implements, tools, and machines. This has been due to the relatively simple task of converting abundant iron ores to metallic iron. No other common metal has the durability of iron. Aluminum has sometimes been called the second most important structural metal, but its extreme softness, even in its alloys, and low melting point have barred it from heavy duty applications. Pound for pound it is stronger than iron, but its bulk is a disadvantage.
Regardless of its durability …
The Determination Of Hydrogen Numbers Of Various Olefins And Unsaturated Fatty Acids Using A Semi-Micro Hydrogenation Apparatus And To Compare These Numbers To Their Iodine Numbers, Francis J. Romeo
Bachelors’ Theses
Many important industrial applications for fatty acids and their derivatives are based on the ability of the unsaturated members of a series to combine with other molecules through the reactivity of their double bonds.
Investigators for quite some time have sought means and methods for determining the number and the position of these double bonds and correlating the results as a means of identification for the unsaturation in fats and oils. Iodine addition to the double bond is employed generally in analytical work as a measure of unsaturation and as a means of separating acids of varying degrees of unsaturation. …
A Scheme Of Analysis For The Ceric Rare Earths, Herschel Gordon Frye
A Scheme Of Analysis For The Ceric Rare Earths, Herschel Gordon Frye
University of the Pacific Theses and Dissertations
The elements numbered 57 to 71 have presented a problem in analytical chemistry unparalleled by that of any other group since their discovery over the span of the nineteenth century. The striking similarities in chemical behavior of the fifteen elements comprising this series have almost completely baffled analysts in every attack, and it is only with the increased use of those newer methods, best described as being of a strictly physical nature, that much real progress has been achieved. Where time-honored classical wet methods have failed rather disappointingly, newer methods based upon the use of the spectrograph and similar instruments …
An Investigation Of Phosphate Adsorption By The Clays Montmorillonite And Kaolinite /|Cby Gordon Richard Bradford, G. R. Bradford
An Investigation Of Phosphate Adsorption By The Clays Montmorillonite And Kaolinite /|Cby Gordon Richard Bradford, G. R. Bradford
Theses and Dissertations
Clay minerals have widespread application in industry and play an important role in plant life (2, 17). It is the adsorptive capacity of clay which determines largely its importance to man (2). The purpose of this investigation is to interpret the mechanism of adsorption of the phosphate anion by the two clay minerals montmorillonite and kaolinite. This particular system was singled out for two reasons: 1. It has agricultural significance. 2. It is believed that if the particular phosphate adsorption mechanism is understood it will aid in an understanding of many other adsorption phenomena associated with clay.
A Study Of Fossil Resins In Huntington Canyon Coal, Ross D. Gardner
A Study Of Fossil Resins In Huntington Canyon Coal, Ross D. Gardner
Theses and Dissertations
The object of this investigation was to determine whether or not a certain sample of raw resin, collected by Mr. Adriaan Nagelvoort from coal from Huntington Canyon, Emery County, Utah, could be separated into more than one fraction with each fraction having distinctly different properties. Three methods of separation were attempted: (l) Separation of specific gravity fractions, (2) separation by use of solvents, and (3) chromatographic separation. Properties determined as a means of establishing any differences in the resins were: solubility, softening points, acid numbers, and iodine numbers.
Dielectric And Solvent Effects On The Alkaline Hydrolysis Of Ethyl-Acetate., James Edward Potts
Dielectric And Solvent Effects On The Alkaline Hydrolysis Of Ethyl-Acetate., James Edward Potts
LSU Historical Dissertations and Theses
No abstract provided.
The Effect Of Metallic Fluorides On Oleic Acid At Elevated Temperatures, Lorraine W. Dupuis
The Effect Of Metallic Fluorides On Oleic Acid At Elevated Temperatures, Lorraine W. Dupuis
Bachelors’ Theses
The problem of finding the effect of metallic fluorine compounds on oleic acid at elevated temperatures was presented in connection with the thesis of J.J. Wocasek of Marquette University. Doctor Wocasek had used fluorine compounds as catalysts in a.n attempt to find a substitute for tung oil. He used the fluorides as catalysts in the esterification of glycerol with unsaturated acids.
The Determination Of The Surface Tension Of Benzyl Ether, Sze-Kwei Min
The Determination Of The Surface Tension Of Benzyl Ether, Sze-Kwei Min
Masters Theses
"The accurate determination of surface tension is of importance in the investigation of theories of surface structure, the structure of liquids, molecular cohesion, in the study of colloids, especially in physiological work, and in various lines of technical chemistry. The two methods most commonly used for determining surface tension are the capillary rise method and the drop weight method. The theory of the former is simple, but its technique is difficult. Its use in some cases is the cause of errors as high as 30%, due to its inapplicability to certain classes of substance, and is much more sensitive to …
Value Of The Dispersion Scale On The Abbe Refractometer, Marilyn Jane Malewitz
Value Of The Dispersion Scale On The Abbe Refractometer, Marilyn Jane Malewitz
Bachelors’ Theses
No abstract provided.
The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford
The Preparation Of Certain Organic Chloroformates And Carbonates, Robert E. Brailsford
Theses and Dissertations
This brief discussion and research paper attempts to correlate a large portion of the information about the preparation of known organic chloroformates and carbonates, to point out the present and possible future uses of these compounds, and to contribute some information concerning the preparation of a number of the organic carbonates. A comparison of the different methods of preparation is made.
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
An Investigation Of The Colorimetric Methods For The Determination Of Fluorine By The Zirconium Alizarin Sulfonate Method, William Lewis Break
Masters Theses
"There has been a need for a rapid and an accurate method for the determination of fluorine in its compounds. Both gravimetric and volumetric methods have been studied, but both methods were time consuming or inaccurate or both. Colorimetric methods had been studied before F. Richter developed his method but none had been reported to be as satisfactory as his method. This method was investigated because it was thought that F. Richter's method would be a satisfactory colorimetric determination for fluorine in its compounds"--Introduction, page 1.
The Effect Of Weak Acid On The Stability Of Burnishing Ink, Marcella Wamser
The Effect Of Weak Acid On The Stability Of Burnishing Ink, Marcella Wamser
Bachelors’ Theses
By definition we find "An emulsion being a system containing two liquid phases, one of which is dispersed as globules in the other. That liquid which is broken up into globules is termed the dispersed phase, whilst the liquid surrounding the globules is known as the continuous phase or dispersing medium". If a small portion of benzene is poured into a large volume of water, it can be emulsified by simply shaking or agitating. Again, chloroform and water with shaking gives an emulsion.
Thermochemical Studies Of Special Propellants., Frederick C. Damm
Thermochemical Studies Of Special Propellants., Frederick C. Damm
Electronic Theses and Dissertations
No abstract provided.
A Study Of The Reactions Of Anhydrous Hydrogen Fluoride On Organic Compounds, Daale Jones
A Study Of The Reactions Of Anhydrous Hydrogen Fluoride On Organic Compounds, Daale Jones
Bachelors’ Theses
There are many uses for anhydrous hydrogen fluoride in the field of organic synthesis. The addition of hydrogen fluoride to a double bond is readily carried out at room temperature and provides a good starting point for mastering the special technique. It is widely used as one of our best · polymerizing agents. It has many uses as a catalyst in alkylation, acylation, Fries change and ring closure reactions. Due to its extreme reactivity a complete understanding of the material is necessary in order to handle it properly. The matter of technique in manipulation and carrying out reactions was one …
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 …
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 Suggested Method For The Measurement Of Unsaturation In Organic Compounds By Means Of A Hydrogen Number, Richard Roberts
A Suggested Method For The Measurement Of Unsaturation In Organic Compounds By Means Of A Hydrogen Number, Richard Roberts
Bachelors’ Theses
The measurement of unsaturation in organic compounds are commonly expressed in terms of an iodine number, but as this value is not trustworthy in a number of cases, it has been suggested by earlier worker that an indication of unsaturation could be obtained by the quantitative hydrogenation of a compound and expressing the result in terms of a hydrogen number. Although such determinations have been previously made, usually at elevated temperatures and pressures, it is the purpose of this work to carry out the hydrogenation at room temperature and atmospheric pressure. For purposes of comparison, determinations will be made at …
Gas - Volumetric Semimicrodetermination Of Carbon: A Wet Method For Aliphatic And Cyclic Compounds, Roger P. Staiger
Gas - Volumetric Semimicrodetermination Of Carbon: A Wet Method For Aliphatic And Cyclic Compounds, Roger P. Staiger
Chemistry Honors Papers
This 18 page thesis explains the technique and apparatus of gas-volumetric semimicrodetermination of carbon and shows the accuracy of this method.
Direct Spectrophotometric Determination Of Lead Naphthenate In Linseed Oil, Nicholas Peter Oehlberg
Direct Spectrophotometric Determination Of Lead Naphthenate In Linseed Oil, Nicholas Peter Oehlberg
Master's Theses
No abstract provided.
Zeta Potentials., Joseph Ehrman Pryor
Zeta Potentials., Joseph Ehrman Pryor
LSU Historical Dissertations and Theses
No abstract provided.
Preparation And Properties Of Diethylene Glycol Fumarate Resin, Marian Sargent
Preparation And Properties Of Diethylene Glycol Fumarate Resin, Marian Sargent
Bachelors’ Theses
Fumaric acid, an unsaturated acid , condensed with diethylene glycol forms diethylene glycol fumarate, a resinous product of high molecular weight. This reaction is typical of condensation reactions. Since this is only the first step in making suitable finished products, the author wished to make a study of the preparation and properties of this condensation product and determine which of the known polymerizing agents were best suited for practical use.
The Cleaning Action Of Detergents And Soaps On Printer's Ink And Lubricating Oils, Daniel David Holzman
The Cleaning Action Of Detergents And Soaps On Printer's Ink And Lubricating Oils, Daniel David Holzman
Bachelors’ Theses
During the past few years, industry has developed a steadily increasing interest in certain new types of synthetic organic compounds.
Industry devoted to the cleaning of textiles has found the removal of printer's ink and lubricating oils a tedious operation.
There has been developed and perfected a series of synthetic materials which successfully meet modern needs.
The detergents, in general, have some or all of the following properties: wetting-out, dispersing, emulsifying, penetrating, and cleaning.
There seems to be a need to investigate some of these new detergents for commercial cleaning purposes.
The Effect Of Elevated Temperatures On Zinc Plated Copper, Jerome E. Sommerfield
The Effect Of Elevated Temperatures On Zinc Plated Copper, Jerome E. Sommerfield
Bachelors’ Theses
While attending school the author was employed by the Harnischfeger Corporation and the subject of the thesis was chosen along a line in which the writer was familiar.
Concrete And Cement Surface Coatings, Gabriel J. Popovich
Concrete And Cement Surface Coatings, Gabriel J. Popovich
Bachelors’ Theses
It has been with difficulty that precise information of any kind regarding the surface coating of concrete and cement finishes had been found. In fact, there was limited information to be found after 1930. Having but a short time to conduct any research, it was impossible to delve too deeply into this branch of the thesis. It is sincerely hoped that in the very near future a more thorough, extensive and comprehensive study can be made on this subject. The purpose of this thesis is to determine the best composition of concrete and the best surface coating for it and …
Melting Point Studies Of Binary Mixtures Of Barbowax 4000 And 1500 And Various Waxes In An Air Chamber, Arnold P. Feider
Melting Point Studies Of Binary Mixtures Of Barbowax 4000 And 1500 And Various Waxes In An Air Chamber, Arnold P. Feider
Bachelors’ Theses
While selecting the subject of research for this thesis the author had the opportunity to consult several thesis conducted at Marquette University on the melting points of waxes.