Physical Sciences and Mathematics Commons^™

Oxygen Permeability Of Free Paint Films, Janice I. Kellerman

Masters Theses

"As early as the mid 1800’s investigations were performed on the gas passage through rubber, but it is only comparatively recently that plastic polymeric materials have come into prominence. One interesting aspect of much experimentation begun was that of permeability, and it was soon evident that, in general, polymeric materials have extremely low permeability of gases. This is, in essence, the basis for use of plastics as packaging materials, balloons, and in many other designs and fabrications where it is desirous and/or necessary to exclude air.

There are several variables which must be taken into consideration in the evaluation of …

Reaction To 1-Bromo-2, 3-Epoxybutane With Phenol In The Presence Of Boron Trifluoride, Robert F. Bridger

Masters Theses

"It is the purpose of this investigation to study the reaction of phenol with 1-bromo-2,3-epoxybutane in the presence of boron trifluoride and to identify the reaction products in order to gain information which will be helpful in understanding the mechanism of the reaction"--Introduction, page 3.

The Use Of Chelating Agents In Inorganic Analysis, Richard K. Vitek

Masters Theses

"The objectives of this investigation were; (1) to improve the existing gravimetric method of analysis for palladium with dimethylglyoxime by adding EDTA to the solution to chelate interfering metal ions: (2) to develop a new and better gravimetric method of analyses for palladium with a different organic ligand and employing a chelating agent such as EDTA or NTA to remove the interference of foreign ions"--Introduction, page 2.

Transference Numbers Of Concentrated Manganous Chloride Solutions, Marshall L. Severson

Masters Theses

"Electrolytic conduction differs from metallic conduction only in the nature of the carrier of the current. In the case of metallic conduction the carrier is electrons. The passage of an electric current through an electrolyte occurs only by the movement of ions of opposite charge moving in opposite directions under an applied potential. The current carried by a particular ionic species is a direct function of the concentration, the charge on the ion, and the ionic mobility. A transference number is the fraction of the total current a given ion carries in a particular electrolyte undergoing electrolysis. The sum of …

The Effect Of Ph On Phase Reversals Of Protein-Stabilized Emulsions, Samuel Arthur Bradford

Masters Theses

"The phase reversal of an emulsion from a system in which oil droplets are dispersed in a water medium to a system in which water droplets are dispersed in oil is dependent upon the interfacial characteristics of the liquids and the emulsifying agent being used, as well as the volume ratio of the two liquid phases. A preliminary investigation at this institution has indicated a possible relationship between phase reversal and the isoelectric point of gelatin used as the emulsifying agent. Since the properties of proteins vary so greatly with the hydrogen ion concentration, particularly near their isoelectric points, research …

The Effect Of Metallic Naphthenates On The Oxidation Of Linoleic Acid, David Elliott Troutner

Masters Theses

"It has been known for many years that certain metallic soaps catalyse the drying of oils. A great deal of information is available concerning the use of these soaps, but there is little knowledge of the actual manner in which the soaps catalyse drying. As the drying is known to be an autoxidation reaction, it is generally believed that the soaps must affect the oxidation of the oil in some way. The work described in this thesis was undertaken to gain some knowledge of the mechanism of the catalysis, and to correlate the effect of the soaps on the drying …

Addition Of Ketene To Ethylene Oxide, John Philip Friedrich

Masters Theses

"The object of this work was to study the reaction between ethylene oxide and ketene, and if possible, to isolate and identify the postulated γ-butyrolactone. Although the results could hardly be described as completely gratifying, they were at least in a sense positive. Many possibilities remain with regard to further modifications of the experimental work on this problem, however it is the author's sincere wish that this investigation will serve some useful purpose in the future"--Introduction, page 4.

Separation Of Germanium, Lead, Zinc, And Cadmium By Anion Exchange, Franklin Maynard Hill

Masters Theses

"The object of this study was to investigate the ion exchange behavior of germanium and apply the anion exchange technique for the separation of germanium, cadmium, lead, and zinc.

A new interest in germanium has developed because of its recent industrial application as a semi-conductor. Analytical methods for the separation and analysis of germanium in low concentrations have not been perfected. Krause and Johnson, in a recent review, discussed and evaluated a number of methods.

Most of the methods for the analysis of germanium require a preliminary separation. The analytical methods for germanium reported in the literature are troublesome and …

4-Benzoyl-4-Methyl-1, 2-Epoxypentane, An Attempted Synthesis, Robert L. Snell

Masters Theses

"The object of this research was to prepare first the simplest homologue of the epoxy-ketone considered by Russell to have been his product. If this homologue, 4-benzoyl-4-methyl-1,2-epoxypentane, could be prepared and caused to form a cyclic derivative of the type given by 1,4-diketones with 2,4-dinitrophenylhydrazone, the organic chemist would be given a new approach to substituted 1,2-diazines as well as a previously unreported reaction of the epoxide grouping. If this reaction could be made to occur, other epoxides of this series would be prepared and treated in the same manner.

It was decided that the shortest route to 4-benzoyl-4-methyl-1,2-epoxypentane would …

Halogenated Epoxide-Phenol Reactions A Mechanism Study, Richard L. Rowton

Masters Theses

"The object of this investigation was to study the reactions of two other halogenated epoxides--namely, 3-bromo-1,2-epoxybutane and l-bromo-2,3-epoxybutane--with the phenolate ion, with the hope that the results obtained would shed additional light upon the mechanisms of such reactions. At the present time, no direct practical applications of the results can be forseen. However, the information gained will be a worthwhile addition to the vast existing store of knowledge already at our disposal, and might be of some help to future investigators"--Introduction, page 2.

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.

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 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.

Ammonium And Alkylammonium Salts Of Carboxylic Acids As Characterizing Derivatives, Hal Gilbert Lankford

Masters Theses

"One of the methods widely used to establish the identity and purity of an organic compound is to prepare various derivatives, the properties of which have been reported in the literature. The object of this investigation was to prepare ammonium and alkylammonium salts of carboxylic acid and determine their utility as characterization derivatives. Should these salts meet the requirements of a satisfactory derivative, they would be particularly valuable from a standpoint time, since they are generally very quickly formed"--Introduction, page 1.

Reduction Of Beryllium Compounds With Magnesium, Pei Wang

Masters Theses

"The purpose of this research was to investigate the thermal reduction of beryllium compounds and to devise a method to estimate the metallic beryllium content in the final product"--Introduction, page 1.

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 …

The Separation Of The Rare Earths Neodymium And Praseodymium By Precipitation As Chloride, Stanley Milton Kulifay

Masters Theses

"The purpose of this thesis is to provide a means of preparing highly purified samples of neodymium and praseodymium compounds when the material to be refined already exists in a state of approximate purity. The method described cannot be profitably used to purify the individual rare earths without first concentrating them. The process is not intended to be quantitative, for it is a fractional crystallization technique using a concentrated hydrochloric acid medium"--Introduction, page 1.

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.

A Study Of The Electrolytic Reduction Of Pyrrole, Don Richard Strehlau

Masters Theses

"A review of the chemical literature has shown that electro-organic methods compare favorably with purely chemical methods for certain syntheses belonging to the following general classes of reactions: coupling, oxidation, reactions with halogens, and reductions. Electro-organic methods have been used most successfully in synthesis by reduction. The chief advantage is using electrolytic reduction in preference to a chemical one is that it offers a more exact control of conditions, and consequently should give a higher yield and a purer product. The advantages of the means of reduction suggested an investigation of its use in the synthesis of hydrogenated products of …

Studies On The Quantitative Analysis Of Rhenium And Its Occurrence In The Products Of Molybdenite Processing, Walter Keith Dean

Masters Theses

"There is at the present time no commercially developed source of the metal rhenium in the United States. Since this metal is known to exist in molybdenite, it was felt that a study of the products of the metallurgical processing of this mineral might reveal a source of rhenium that could e developed. The Climax Molybdenum Co. provided a number of samples from their smelter at Langloth, Pennsylvania. Although an improved method for the quantitative estimation of rhenium was recently published, its accuracy was not high and the procedure exacting and time-consuming. These combined factors led to the selection of …

The Volumetric Determination Of Alumina In Clays And Related Materials, David Ferdinand Boltz

Masters Theses

"The primary purpose of this thesis was to develop a direct method for the determination of alumina in certain silicates. The classical gravimetric procedure for the analysis of alumina in clays and related materials has often been regarded as being too lengthy and troublesome, especially when only the percentage of alumina was desired. The correct determination of alumina is undoubtedly one of the most unsatisfactory of the chemical constituents of siliceous materials, and therefore the development of a direct volumetric method for the determination of this constituent was made the main objective of this research, page [1].

Consumption And Uses Of Crude Barite And Its Derivatives, Peter Simonds

Masters Theses

"Barite is a widely distributed mineral composed of barium sulphate - BaSO₄. Its most striking feature is its weight - its specific gravity of 4.5 being about twice that of salt and many other of the colorless, transparent and vitreous minerals of its general appearance. The Mineral is usually found in a state of considerable chemical purity. However, small amounts of strontium and calcium sulphates may isomorphously replace the barium salt. Crystals of barytes are orthorhombic; usually very perfectly developed and have a wide variety of forms. The simplest crystals are rhomb-shaped tables bounded by two faces of a basal …

Electrolytic Reduction Of Galena In Fused Salt, Peter Simonds

Masters Theses

"A demand has long existed for a method of directly recovering elemental Sulphur, in addition to the Lead, from Galena ore. At the present time, the sulphur of this ore is dissipated in the lead blast furnace as sulphur dioxide fumes. While the fumes are trapped to avoid damage to the vegetation of the surrounding countryside, their concentration is usually too low to make sulphuric acid as a profitable by-product. Thus, contrary to some speculation, the sulphuric acid produces under the circumstances is usually not a true by-product in the money-making sense of the term in many cases, but a …

The Reactions Of Acid Halides With Sodium, Magnesium, Zinc And Amalgams, William H. Webb

Masters Theses

"The reactions of acid halides with metals are of interest because there seems to be a possibility of abstracting the halogens from two molecules of the halide, and thereby bringing about a coupling reaction; or the formation of an intermediate organo-metallic compound which would react with another molecule of the acid halide. The result of these reactions should be the formation of diacetyl and acetyl chloride and of dibenzoyl or benzil from benzoyl chloride. This procedure would be far better than the usual procedures for the preparation of these compounds...The results reported in the literature by different workers, on the …

The Catalytic Vapor-Phase Hydrolysis Of Benzene And Toluene, Clemens Raebel Maise

Masters Theses

"The vapor-phase synthesis of organic compounds represents a new field of study which has attracted the attention of investigators only within recent years. However, wide interest is apparent in this field and several processes of commercial importance have already been developed. Hydrolysis is perhaps the newest of all the types of vapor-phase synthesis; the literature consists of little more than a few patents...The vapor-phase hydrolysis of benzene and toluene, therefore, presented an interesting possibility. These two hydrocarbons are considered very stable toward water in the liquid-phase. The purpose of this investigation was to determine to what extent their stability toward …

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 …

Pyrochemical Changes In Missouri Halloysite, Frank Joseph Zvanut

Doctoral Dissertations

"For centuries it has been known that the application of heat to a clay or a clay body produces changes that make it an entirely different substance from the original raw clay. Ever since the earliest civilizations produced crude building brick by baking formed clay bodies in the sun's rays, mankind has been speculating on the nature of the changes that convert soft, friable, plastic clays into hard, strong, non-plastic, rock-like masses. It has been only within the last two decades, however, that progress has been made in the solution of problems dealing with the resultant products in fired clay …

A Study Of Methods For Separating The Elements That Interfere In The Electrolytic Deposition Of Lead As Lead Oxide, John Shaw Sabine

Masters Theses

"The electrolytic determination of lead as lead dioxide is a very desirable method, due to its simplicity, accuracy, and the small amount of the analyst's time required. The electrolytic method functions when both large and small amounts of lead are present. The method depends upon the fact that from a nitric acid solution the lead is plated upon the anode as lead dioxide; from the lead dioxide deposit the percentage of lead may be calculated.

An electrolytic method, for determining the lead in samples containing from 5 to 150 mg. of lead, was described in a paper by Schrenk and …

Steric Hindrance In The Ketonic Splitting Of Substituted Acetoacetic Ester, Claude Stanley Abshier

Masters Theses

"The phenomenon of steric hindrance has been observed and investigated in a variety of reactions, most of which have been with aromatic compounds. In this branch of study the speeds of reaction of ethyl acetoacetate, α-mono-methyl-ethyl-acetoacetate, α-mono-ethyl-ethyl-acetoacetate, α-mono-propyl-ethyl-acetoacetate in the presence of 0.05 and 0.10 normal hydrochloric acids have been investigated at temperatures between 60⁰C. and 90⁰C. An attempt has been made to explain the results obtained"--Introduction, page 1.

The Preparation And Specific Gravity Of Pure Formic Acid And Its Aqueous Solutions, Leo Henry Merchie

Masters Theses

"Formic acid, the lowest member of the fatty acid series, was obtained as early as the seventeenth century by distilling ants with water. Other methods were later found after the correct constitution of the acid became known. This acid is not difficult to prepare in a water solution, but it is difficult to obtain in the anhydrous state...The purpose of this work is to study the various methods of preparing anhydrous formic acid, to improve a method for preparing the anhydrous acid, and to correct specific gravity tables for aqueous solutions of formic acid"--Introduction, page 1-2.