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Articles 33991 - 34020 of 34514
Full-Text Articles in Physical Sciences and Mathematics
Internal Pressure And Related Physical Properties, Eugene Ceperley
Internal Pressure And Related Physical Properties, Eugene Ceperley
Bachelors’ Theses
What is internal pressure? That question has never been answered in a satisfactory manner. Probably the best answer is the simple statement that it is a measure of the attraction between molecules. While this is true it gives no indication of what causes the attractive force or of the effects which this attraction has on a substance.
In this thesis an attempt will be made to use this vague definition of internal pressure to find a method of calculating internal pressure using data for various physical properties. The liquid state of various substances will be considered. A relationship which holds …
A Kinetic Study Of The Autocatalytic Reaction Between Aniline And Benzoic-Anhydride In A Non-Polar Solvent., Jack Warren Knight
A Kinetic Study Of The Autocatalytic Reaction Between Aniline And Benzoic-Anhydride In A Non-Polar Solvent., Jack Warren Knight
LSU Historical Dissertations and Theses
No abstract provided.
A Study Of Some Factors Affecting Chromatographic Adsorption., Patterson B. Moseley
A Study Of Some Factors Affecting Chromatographic Adsorption., Patterson B. Moseley
LSU Historical Dissertations and Theses
No abstract provided.
Studies In Analytical Chemistry: I. New Methods For The Determination Of Ash In Petroleum Crudes. Ii. Studies In Oscillographic Polarography., Gerald Perkins
Studies In Analytical Chemistry: I. New Methods For The Determination Of Ash In Petroleum Crudes. Ii. Studies In Oscillographic Polarography., Gerald Perkins
LSU Historical Dissertations and Theses
No abstract provided.
Cyclic Derivatives Of Tris (Hydroxymethyl) Aminomethane : Monourethans And Ureas, Julian Lee Rush Jr.
Cyclic Derivatives Of Tris (Hydroxymethyl) Aminomethane : Monourethans And Ureas, Julian Lee Rush Jr.
Master's Theses
The purpose of the work reported in this thesis was to study the chemistry of tris(hydroxymethyl)aminomethane (A), H2Nc(cH20H) 3, a beta-hydroxy amine.
Radioactive Carbon Labeled Molecules: A Method Of Synthesis, Glen E. Benedict
Radioactive Carbon Labeled Molecules: A Method Of Synthesis, Glen E. Benedict
Masters Theses
"Use of isotopic carbon in determining organic reaction mechanisms is becoming more popular daily. The reasons for this trend are, the increasing availability of intermediate compounds, the increase in isotope handling knowledge, and mechanisms defined by well ordered tracer reactions are considered infallible.
The mechanism of reaction of halo-epoxides has been a point of conjecture for some time"--Introduction, page 1.
The Detection And Determination Of Antimony By Means Of Rhodamine B., William Cornelius Hamilton
The Detection And Determination Of Antimony By Means Of Rhodamine B., William Cornelius Hamilton
LSU Historical Dissertations and Theses
No abstract provided.
A Spectral Study Of The Monodeuterated Isomers Of Bromobenzene., James Wallace Meadows
A Spectral Study Of The Monodeuterated Isomers Of Bromobenzene., James Wallace Meadows
LSU Historical Dissertations and Theses
No abstract provided.
Some Applications Of Chromatography To Specific Problems., Marvin Lee Owens
Some Applications Of Chromatography To Specific Problems., Marvin Lee Owens
LSU Historical Dissertations and Theses
No abstract provided.
Proper Mixtures Of Ellis County Soils For Adobe Construction, And Their Physical Properties Part Ii, Buster Wayne Read, W. G. Read, H. A. Zinszer
Proper Mixtures Of Ellis County Soils For Adobe Construction, And Their Physical Properties Part Ii, Buster Wayne Read, W. G. Read, H. A. Zinszer
Fort Hays Studies Series
Houses made of soil have been built for centuries, but until recently the trend had been away from soil to some other building material. Now, however, adobe is again beginning to be recognized as a satisfactory, reliable building material for our time.
Intermediate Compounds In The Synthesis Of Lignin, Paul Spencer Gakle
Intermediate Compounds In The Synthesis Of Lignin, Paul Spencer Gakle
University of the Pacific Theses and Dissertations
The synthesis of a keto-aldehyde from salicylaldehyde and benzaldehyde was attempted. The first step was to protect the carbonyl with a non-reactive group.
The bisulfite addition product and the 2,4-dinitrophenylhydrazone of salicylaldehyde were prepared. The methyl acetal, the sodium bisulfite addition product, and the 2,4-dinitrophenylhydrazone of benzaldehyde were also prepared.
The bisulfite addition of both aldehydes was found to be too unstable in the presence of aldehyde was recovered in each case. The methyl acetyl chloride also decomposed. This necessitated finding a more stable group to protect the aldehyde.
The 2,4-dinitrophenylhydrazone was unaffected by treatment with anhydrous aluminum chloride in …
Chromatographic Studies., Patrick Henry Monaghan
Chromatographic Studies., Patrick Henry Monaghan
LSU Historical Dissertations and Theses
No abstract provided.
An Analysis Of The Oil Of Echinocystis Fabacea Seeds, Francis Warren Sayre
An Analysis Of The Oil Of Echinocystis Fabacea Seeds, Francis Warren Sayre
University of the Pacific Theses and Dissertations
Echinocystis fabaceae, commonly called “Man Root” because of the peculiar shape of the root, not unlike that of a man, finds abundant occurrence in the central valleys of California. This plant, a member of the wild cucumber family, is of particular interest because it is an oilseed plant. The variety agrestis is especially common around Stockton. Other varieties are found throughout the Sacramento and San Joaquin Valleys and in the Coast Range Mountains.
Oils have played an important part throughout history and are continuing to do so in our present economy. An investigation of the oils of Echinocystis fabaceae seeds …
The Polarographic Determination Of Germanium, Herbert L. Bowkley
The Polarographic Determination Of Germanium, Herbert L. Bowkley
Masters Theses
"The purpose of this investigation was to study the polarographic behavior of germanium in various aqueous solutions. In addition to the simple polarographic behavior of germanium some attention was given to the applications or polarography for the development of an anlytical [sic] procedure for its quantitative determination in zinc ore concentrates and spelter fume materials"--Introduction, page 1.
Attempted Separation Of Similar Ionic Species By Means Of Paper Chromatography, Alexander Beresniewicz
Attempted Separation Of Similar Ionic Species By Means Of Paper Chromatography, Alexander Beresniewicz
Bachelors’ Theses
Chromatosraphy is a comparatively new analytical method which deals mainly with the separation of similar organic compounds. Until now, only a few papers have been published on inorganic paper chromatography. Up to the present time no investigator has made a serious attempt to organize and systematize the large amount of available information in order to clarify the underlying principles.
The author has attempted to investigate the influence of the charge of similar inorganic ions on their separation. In the case of adsorption chromatography, it may generally be stated that ions with higher valence are more readily adsorbed. Such a statement …
The Kinetics Of The Exchange Between Sn(Ii) And Sn(Iv) In Absolute Alcohol, E. Gerald Meyer
The Kinetics Of The Exchange Between Sn(Ii) And Sn(Iv) In Absolute Alcohol, E. Gerald Meyer
Chemistry and Chemical Biology ETDs
In the present work use was made of the radiochemical exchange reaction to study the kinetics of the reaction
SnCl2 + Sn*Cl4 = Sn*Cl2 + SnCl4
in an absolute alcohol medium. A rate equation was established as a function of concentration and temperature, and some predictions were made regarding the mechanism.
Some Reactions Of 4-Chlorocinnoline, F. H. Kruse
Some Reactions Of 4-Chlorocinnoline, F. H. Kruse
Chemistry and Chemical Biology ETDs
This problem involves the preparation of 4-chlorocinnoline by the method of Borshe and Herbert and Busch and Rast,, and the study of further replacement reactions of the chlorine atom in the 4-position. The problem can be subdivided into two sections: (1) the preparation of the 4-cinnolyl Grignard reagent and the corresponding lithium compound and (2) the study of some condensation reactions of 4-chlorocinnoline.
An Analytical Study Of Berberine, W. Riley Mcgaughran
An Analytical Study Of Berberine, W. Riley Mcgaughran
Chemistry and Chemical Biology ETDs
Berberine, an alkaloid, has unique pharmacological properties as well as unusual chemical and physical characteristics. This compound has been used for many years as a remedy for eye diseases. In contrast to most alkaloids, berberine hydroxide is more soluble than its salts. Its chemical structure has been established, but a correlations of many of its properties and its structures has not been made.
The purpose of this work was to undertake an analytical study of berberine, hoping to collect data which would make possible the correlation of certain properties of the compound with its structure. The study was planned to …
The Effect Of Metals On Yeast Activity, Warren Joseph Chamberlain
The Effect Of Metals On Yeast Activity, Warren Joseph Chamberlain
Bachelors’ Theses
The writer, having been employed in the dry yeast research laboratory of one of this country's largest yeast concerns for the past three years, is very much interested in those factors which might affect the qualities of the final dry yeast product, and has therefore made the investigations presented in this paper.
Because of the numerous pieces of metallic equipment employed in the production of yeast, the possibility of metallic contamination in the final yeast product is considerable. Thus, the investigation presented in this paper was carried out in an effort to determine just what effect various concentrations of various …
Comparison Of Worts Prepared By Action Of Malted Barley On Various Flours And Starches, Charles J. Doria
Comparison Of Worts Prepared By Action Of Malted Barley On Various Flours And Starches, Charles J. Doria
Bachelors’ Theses
The object of this thesis to compare the yields of soluble solids, reducing sugars, and proteins in worts prepared by the action of malted barley on various flours and starches. Mashes were prepared and analyses were made on worts prepared from the following:
1. White Wheat Flour
2. Whole Wheat Flour
3. Potato Flour
4. Potato Starch
5. Sweet Potato Flour
6. Oat Flour
7. Tapioca Flour
8. Corn Germ
9. Corn Germ Meal
The results obtained are presented in tabular form as well as graphically for ease in making comparisons. In addition, besides presenting the results calculated on an …
Artificial Weathering Of Creosote With Water And Oxygen, Kenneth Curtis Heckler
Artificial Weathering Of Creosote With Water And Oxygen, Kenneth Curtis Heckler
Honors Theses
There are many experiments being carried on in the field of wood preservation partially because of the variations in the toxicity of many preservatives. The commercial interest is along the lines of expense, since some preservatives have not proven satisfactory because after a short period of time attack by fungus and insects has set in. This thesis is concerned chiefly with the effects of oxidation and leaching. These factors have been insufficiently investigated to produce conclusive evidence on their effects on the toxicity of creosote. Since the other components of air are thought to have little effect on the toxicity …
Test Results For A New Toximetric Method For Evaluating Wood Preservatives; Toxicity Of Vacuum Rectified Fractions Of Coal-Tar Creosote, Clayton Edward Hathaway
Test Results For A New Toximetric Method For Evaluating Wood Preservatives; Toxicity Of Vacuum Rectified Fractions Of Coal-Tar Creosote, Clayton Edward Hathaway
Honors Theses
“Wood preservation – The art of protecting timber against the action of destructive agents. Usually refers to the treatment of wood with chemical substances (preservatives) which reduce its susceptibility to deterioration by fungi, insects, or marine borers. (2) This is the definition proposed for adoption at the forty-third annual meeting of the American Wood-Preserver’s Association in April, 1950. The work in this project was performed to accomplish a two-fold purpose: 1. Determine the inhibitive action of alcohols and amines using a new method of preparing the poisoned malt-agar medium and defining inhibition point. 2. Check the results obtained from this …
A Modified Agar Test Method For Wood Preservatives, Robert Earl Hayes
A Modified Agar Test Method For Wood Preservatives, Robert Earl Hayes
Honors Theses
The principal criteria for a good wood preservative involves the following considerations 1. The preservative must be sufficiently toxic to curb the action of the wood rotting fungi and wood attacking insects 2. The preservative must not attack wood 3. The preservative must not undergo a chemical or physical change brought upon by contact with the wood cells so as to render the chemical agent non-toxic or less toxic 4. The preservative must not be a substance which will attack metals 5. The preservative must be of such a nature as to make it easily injected into wood 6. The …
A Modified Agar Test Method For Wood Preservatives, Robert Earl Hayes
A Modified Agar Test Method For Wood Preservatives, Robert Earl Hayes
Honors Theses
There are two possible methods by which wood could be protected from the attack of saprophytic fungus growth. Either the conditions can be so controlled as to be unfavorable for the growth of the attacking organism, or the wood can be permeated with a poisonous substance which will in some way disrupt the vital processes of the fungus. It is the obvious that the first suggested preventative would not at all be practical due to the wide geographical range over which wood is used and to the various types of weather conditions to which it may be subjected. Consequently, the …
The Effect Of Added Substances On The Volume Change Of Cement, Owen Eugene Brown
The Effect Of Added Substances On The Volume Change Of Cement, Owen Eugene Brown
Honors Theses
There are many substances which effect the volume change of cement during setting, but the lack of time has limited the number and kind of substances used during this research. The effect of salts, or electrolytes, is shown, varying not only the valence of the cation, but also the valence of the anion. A relatively small portion of the existing salts was employed in this work, but they were so chosen as to give a complete picture of their effect on the volume change of cement.
Inhibition Of The Thermal Polymerization Of Styrene, Lester Allan Cohen
Inhibition Of The Thermal Polymerization Of Styrene, Lester Allan Cohen
Honors Theses
The purpose of this work is to study the rate of reaction and mechanism of various inhibitors in the thermal, uncatalyzed polymerization of styrene. Other attempts have been made to study the inhibitory process, the most recent making use of a dilatometer to measure volume changes during the course of polymerization. However, this method, and others, represents indirect means of study. The spectrophotometric method of study presented here, offers a simple and direct method for determining the rate of disappearance of an inhibitor in the inhibition process, and also affords a method calculating the rate constants for the initiation stage …
The Correlation Of The Ultraviolet Absorption Spectra Of Benzotriazole With Its Molecular Structure, John Edward Fagel Jr.
The Correlation Of The Ultraviolet Absorption Spectra Of Benzotriazole With Its Molecular Structure, John Edward Fagel Jr.
Honors Theses
The purpose of this research was to derive, on a theoretical basis, a correlation between the ultraviolet absorption spectra and the molecular structure of benzotriazole. The ultraviolet spectra of buffered aqueous solutions of benzotriazole at numerous pH values from strong acid to strong base have been determined with a Model DU Beckman Spectrophotometer, and an attempt has been made to correlate these spectra with the molecular structure of the compound. As a check on the validity of the theory proposed in correlating the absorption spectra with the molecular structure, the spectra of a 5, (6) – chlorobenzotriazole have been determined …
Study Of The Hofmann Reaction Between Sodium Hypochlorite And Succinamide. Preparation Of Isopropylidene Bis-Phenylen Oxydiacetic Acid. Preparation Of Polyamides, Frederick E. Heinemann
Study Of The Hofmann Reaction Between Sodium Hypochlorite And Succinamide. Preparation Of Isopropylidene Bis-Phenylen Oxydiacetic Acid. Preparation Of Polyamides, Frederick E. Heinemann
Honors Theses
In the Hofmann reaction between succinamide and potassium hypobromite, small yields of dihydrouracil have been obtained. From the reaction of succinamide and sodium hypochlorite it was hoped that larger yields of the dihydrouracil could be obtained and through spectrophotometry identify the compound further.
Preparation Of 2, 4-Dichloro-Α-Chlorostyrene, Walter A. Neumann
Preparation Of 2, 4-Dichloro-Α-Chlorostyrene, Walter A. Neumann
Honors Theses
Styrene and various substituted styrenes have found wide application in the formation of polymers and copolymers, such as synthetic rubbers. Substituted styrenes have been investigated in attempts to develop polymers with special physical properties, a high dielectric constant for an example. α-methylstyrenes have been successfully copolymerized by Bachman and Finholt while α-chlorostyrene seems unreactive toward polymerizing agents.
Iodine Monochloride Investigations, Julian Richard Mayer
Iodine Monochloride Investigations, Julian Richard Mayer
Honors Theses
The purpose of the research was to investigate the reactions of iodine monochloride with non-aromatic and aromatic compounds. The role which this reagent plays in these reactions, the use of various catalysts, and the products obtained were to be studied. It was the immediate object of these investigations to attempt a synthesis of cyclohenzyl iodine directly from cyclohezene using iodine monochloride as the iodinating agent. In studying the non-aromatic compounds in this project, cyclohexene was chosen since it is readily available and yields a single product upon mono-substitution. The major portion of this thesis is concerned with the reaction which …