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Articles 33181 - 33210 of 33355
Full-Text Articles in Entire DC Network
A Study Of Methods Of Determining The Rate Of Acid Hydrolysis Of Wheat Gluten, Angus V. Honrickson
A Study Of Methods Of Determining The Rate Of Acid Hydrolysis Of Wheat Gluten, Angus V. Honrickson
University of the Pacific Theses and Dissertations
Because of the nutritious value of sodium glutamate and its meat-like flavor, which is very pleasing to most people, and hence its demand if it were properly promoted, and because of the abundance of protein in accessible form for its manufacture, it is only reasonable to assume that if the optimum conditions of protein hydrolysis were found, the manufacturing could be made a highly successful enterprise. it was the purpose of this research to investigate the methods by which the hydrolysis of wheat glutes can do conveniently followed in order to determine the efficiency of reactions run under specific conditions.
An Investigation Into The Bromate Method Of Manganese Determination, Ray A. Bunday
An Investigation Into The Bromate Method Of Manganese Determination, Ray A. Bunday
Electronic Theses and Dissertations
Throughout the history of research in the science of Chemistry the problem of the quantitative determination of manganese has always been a perplexing one. The results have usually fallen short of the theoretical value and has necessitated the application of an empirical factor(1) which is always undesirable to the true research scientist, if not to the commercial analyst.
A Study Of Furoyl Chloride., Luella Shehan
A Study Of Furoyl Chloride., Luella Shehan
Electronic Theses and Dissertations
No abstract provided.
The Anti-Oxidant Influence Of Phenol-Formaldehyde Resins On The Drying Of Linseed Oil., Walter William Rinne 1909-1974
The Anti-Oxidant Influence Of Phenol-Formaldehyde Resins On The Drying Of Linseed Oil., Walter William Rinne 1909-1974
Electronic Theses and Dissertations
No abstract provided.
Explosive Property Of Aluminum Powder Liquid Oxygen Mixture, David S. Bruce
Explosive Property Of Aluminum Powder Liquid Oxygen Mixture, David S. Bruce
University of the Pacific Theses and Dissertations
The purpose of this investigation was to determine the optimum conditions for explosion of a mixture of aluminum powder and liquid oxygen when fired without the use of a fixed detonator.
A Study Of Certain Physical And Chemical Effects Of Aromatic Halides, Unsaturated Carboxylic Acids, Saturated Ketohydroxy Acids, And Saturated Ketone Alcohols Upon Hydrocarbon Oils, Clyde Aubrey Crowley
A Study Of Certain Physical And Chemical Effects Of Aromatic Halides, Unsaturated Carboxylic Acids, Saturated Ketohydroxy Acids, And Saturated Ketone Alcohols Upon Hydrocarbon Oils, Clyde Aubrey Crowley
Master's Theses
No abstract provided.
A Review Of The Bromination Of Intermediate Compounds In The Preparation Of 4 - Bromo - 2 - Sulphimide Benzoic Acid And The Preparation Of 4 - Iodo - 2 - Sulphimide Benzoic Acid., Robert E. Johnson
Electronic Theses and Dissertations
No abstract provided.
A Study Of The Products Of The Reaction Between Stannous And Arsenate Ions In Silicic Acid Gels, Frank K. Thompson
A Study Of The Products Of The Reaction Between Stannous And Arsenate Ions In Silicic Acid Gels, Frank K. Thompson
University of the Pacific Theses and Dissertations
The fact that characteristic crystalline products result upon the diffusion of arsenate ions into silicic acid gel which has been impregnated with stannous ions has been known by the Pacific Chemistry Department for some time. The optimum conditions with regards to heat and hydrogen ion concentration have been determined. The purpose of this investigation was to study the products of the reaction. First to determine whether or not the silicic acid itself combined with the stannous and arsenate. ions in the formation of the crystalline product, and second to determine its chemical composition.
The Determination Of The Deuterium Oxide Content Of Various Samples Of Water, Douglas R. Macintyre
The Determination Of The Deuterium Oxide Content Of Various Samples Of Water, Douglas R. Macintyre
University of the Pacific Theses and Dissertations
The purpose of this investigation was to determine the deuterium oxide content of various samples of water by a precise and sensitive method based upon the compressibility of water. These samples were gathered from as many different locations as were deemed necessary.
The Lime Content Of Rocks Of The Upper Cretaceous System Of Ellis County, Kansas, G. Lawrence Rarick
The Lime Content Of Rocks Of The Upper Cretaceous System Of Ellis County, Kansas, G. Lawrence Rarick
Master's Theses or Doctor of Nursing Practice
The report which is being submitted here is the result of several weeks of field and laboratory work investigating the rocks of the Upper Cretaceous System of Ellis County, Kansas. The writer has attempted to consider the subject primarily from a chemical viewpoint although much of the background for the work has been of a geological nature. There has been no attempt to give a complete chemical analysis of the rocks of the Upper Cretaceous System, but rather a more or less thorough analysis in regard to the percentage of lime that the rocks of the various formations and members …
The Effect Of Sodium Fluoride On The Bright Plating Range Of Chromium, Ernst Curschmann
The Effect Of Sodium Fluoride On The Bright Plating Range Of Chromium, Ernst Curschmann
Bachelors’ Theses
Chromium is used very extensively at the present time as an exterior plate over other metals. It has found favor not only because of its brilliant blue, untarnishable lustre, but also because of its extreme hardness. The great increase in the demand for chromium plate in recent years, rapidly relegating nickel plate into the background, has resulted in increased research and experimentation .in the field of chromium plating, in the endeavor to provide a lasting, beautiful plate at a minimum of expense.
Present chromium plating baths containing sulphuric acid as the active agent of deposition leave much to be desired …
Conductivity Applications, Henry W. Koch
Conductivity Applications, Henry W. Koch
Bachelors’ Theses
Since the introduction of Arrhenius’ theory of electrolytic dissociation more than forty years ago, many applications of the chemistry of electrolytes have been formulated. Of the many uses of conductance measurements, conductivity titrations have lately assumed the theoretical and technical importance which they rightfully should have. Conductance measurements enjoy prominence both in practice and in research, and the almost unlimited field provides a wealth of material for the ardent electrochemist. There is no doubt that many of the old analytic methods will soon be largely supplanted by this newer procedure which even at the present finds such varied usefulness.
The Preparation Of Calcium And Barium Gluconate, Ronald Anthony Plzak
The Preparation Of Calcium And Barium Gluconate, Ronald Anthony Plzak
Bachelors’ Theses
The privilege of working on this subject is one which the author has sincerely appreciated, as it has given him the opportunity of incorporating many of the more recent contributions along the line of oxidizing aldose sugars. In reviewing these contributions, he has abstained from conveying an impression of finality and has attempted to show the many possibilities which the free sugar acids offer for the future. The experience of the last few years has proved that even long-cherished conceptions and apparently well-established facts may at any time undergo drastic revision. For this reason, the author has referred directly to …
An Investigation Of The Methods Used In The Preparation Of Acid Amides, Everett Stats
An Investigation Of The Methods Used In The Preparation Of Acid Amides, Everett Stats
Bachelors’ Theses
Much work has been done on the preparation of acid amides, but there are few sources where one may find the methods tabulated. It has been the purpose of this Thesis, therefore, to try out various methods and conditions for the preparation of the aliphatic and aromatic amides and to record them.
A Comparison Of The Caffeine Content Of Various Coffees, Emil J. Petrusek
A Comparison Of The Caffeine Content Of Various Coffees, Emil J. Petrusek
Bachelors’ Theses
Coffee must be rated as one of the most important commodities in the commercial world due to the statistics or output and consumption. There are various brands and kinds of coffee produced by the different growers and roasters. Now to sell the brands, the various concerns base their advertising upon the flavor and price of the coffee. It is a fact that the flavor of coffee is in some way affected by the caffeine present. One popular brand is advertised as decaffeinated, that is, the caffeine has been removed. Confronted with these facts, it occurred to the author to test …
The Extraction Of Tantalum And Columbium From Tantalite, Stanley P. Wisniewski
The Extraction Of Tantalum And Columbium From Tantalite, Stanley P. Wisniewski
Bachelors’ Theses
In the summer of 1932, the Milwaukee Public Museum, sent an expedition to the Bad Lands and Black Hills of South Dakota, under the direction of Dr. Ira Edwards, Curator of Geology in that institution. It was at this time that the author, a member of this group, while studying the pegmatites of the Black Hills, became interested in the tantalum-columbium bearing minerals of that region, namely tantalite and columbite. At that time the writer made a detailed mineralogical study of these two minerals, as well as a thorough investigation of their occurrence in that region. In the fall of …
Sensitivity Of Curcumin As An Organic Reagent In Testing For Beryllium, James W. Bookhamer
Sensitivity Of Curcumin As An Organic Reagent In Testing For Beryllium, James W. Bookhamer
Bachelors’ Theses
For many years the analytical chemist avoided by design or more probably by accident the general use of organic chemicals in his work. Some few of them he accepted as a matter of course, and perhaps without much thought of their organic nature. In qualitative analysis he used chloroform as a solvent in testing for bromine and iodine. A few indicators were in common use, but organic chemicals were used but little in analytical work. It was not until the twentieth century that their use in analytical procedures received any worthwhile attention. Since then they have rapidly come to the …
The Purification Of Coffee Wax By Means Of A Special Extractor Followed By A Dialysis Process, John Dobrojevic
The Purification Of Coffee Wax By Means Of A Special Extractor Followed By A Dialysis Process, John Dobrojevic
Bachelors’ Theses
This work was performed with the intention of devising a method where-by true wax could be isolated from a conglomerated mixture called coffee wax.
The Grignard Reagents: Their Preparation, Flora Cooke
The Grignard Reagents: Their Preparation, Flora Cooke
Chemistry Honors Papers
This 14 page thesis examines various methods for the preparation of the Grignard reagent.
Chemical And Physical Considerations Of Carbohydrates, Flora Cooke
Chemical And Physical Considerations Of Carbohydrates, Flora Cooke
Chemistry Honors Papers
This 13 page thesis examines chemical and physical considerations of carbohydrates.
Some Aldehyde Condensation Derivatives Of Creatinine, Clarence England Denoon Jr.
Some Aldehyde Condensation Derivatives Of Creatinine, Clarence England Denoon Jr.
Master's Theses
When insulin, a substance which is used to reduce sugar in the blood is hydrolysed, products are obtained bearing some similarity to creatinine. Therefore, reasoning conversely, creatinine derivatives might be expected to posses as a hypo- glycemic (sugar reducing) effect.
Selenium In Proteins From Toxic Foodstuffs, Edgar Page Painter
Selenium In Proteins From Toxic Foodstuffs, Edgar Page Painter
Electronic Theses and Dissertations
The importance of the selenium problem has been established. Knight (1) in an address before The Association of Official Agricultural Chemists summarized the progress made on the problem, conservatively emphasized its importance, and stressed the need for extensive research. It is a paramount problem not only in South Dakota, but in many other states as well.
A Contribution To The Preparation Of Synthetic Rubber From Butyl Alcohol, Rosalia Aloisia Leutgoeb
A Contribution To The Preparation Of Synthetic Rubber From Butyl Alcohol, Rosalia Aloisia Leutgoeb
Bachelors’ Theses
Rubber, on account of its almost universal usefulness is one of the important materials of modern time. The unequalled utility of it is found in its physical properties, such as elasticity and toughness, which are not possessed by other plastic substances.
Some Contributions To Iodometric Technique, Justin Kimber Dyche
Some Contributions To Iodometric Technique, Justin Kimber Dyche
University of the Pacific Theses and Dissertations
Analysis is a very important branch of chemistry, for it is such a practical part of the science. Analysis is itself divided into two parts. Qualitative analysis discovers what things are present in the material in question. Quantitative analysis then determines how much of each ingredient is present. This thesis considers a limited section of quantitative analysis.
This thesis deals with the use of iodine in volumetric analysis, which is called either iodimetry or iodometry. In this type of analysis, the iodine is used in solution and reacts with some other material, also in solution, and takes up electrons. That …
Effect Of Varying Supports On Nickel As A Catalyst In The Hydrogenation Of Unrefined And Refined Soy Bean Oil, Nate W. Fredman
Effect Of Varying Supports On Nickel As A Catalyst In The Hydrogenation Of Unrefined And Refined Soy Bean Oil, Nate W. Fredman
Bachelors’ Theses
Hydrogenation is a subject that has grown in importance only within the last thirty years. Before 1900, little was known about the process of adding hydrogen to a liquid oil to form a solid fat, the latter of which has a great deal more uses than the former. Much trouble was experienced, since conditions controlling the process must be very definite in order to obtain good results.
Chemists have found that the main requisite in the above process is the catalyst. It must be very carefully prepared and controlled. But instead of using only the catalyst, many modern research workers …
The Effect Of Halowax 1012, 1013 & 1014 On The Melting Points Of Various Waxes, Louis Henry Kroening
The Effect Of Halowax 1012, 1013 & 1014 On The Melting Points Of Various Waxes, Louis Henry Kroening
Bachelors’ Theses
This thesis is concerned with the melting points of various waxes and the effect of Halowax 1012, 1013 and 1014 upon their physical constants. Interest in this problem was aroused "by the fact that Halowax as shown by Nathan Smith in his thesis, "The Effect of Halowax Upon Lubricating Oils and Greases”, decreases the viscosity of oils. Since lubricating oils contain waxes it is logical to expect that this decrease in viscosity is due to the lowering of the melting point of the waxes present. It was to investigate the truth of this assumption that this work was begun.
A Study Of Melting Points Of Various Ternary Mixtures Of Waxes, Leonard Anthony Veranth
A Study Of Melting Points Of Various Ternary Mixtures Of Waxes, Leonard Anthony Veranth
Bachelors’ Theses
The work undertaken in this thesis is a continuation of the work done by George John Hable entitled, "A Study of Melting Points of Various Binary Mixtures of Waxes". In the present work, the melting points of ternary mixtures of waxes is studied. The experimental work is presented in the form of graphs so that the reader is afforded a better representation and clearer conception of the work done and the results obtained.
The Effect Of Ultra-Violet Light On Ethyl Acetate, Homer W. Wiesner
The Effect Of Ultra-Violet Light On Ethyl Acetate, Homer W. Wiesner
Bachelors’ Theses
The present work, is a study of the effect of ultraviolet light on pure organic compounds. In particular, it is a qualitative and quantitative study of_ the decomposition products of ethyl acetate as effected by ultraviolet radiations, together with the development of experimental apparatus. In as much as the work required special apparatus, much of the time was spent in the development and construction of such apparatus.
A Method Of Determining The Relative Thermal Conductivities Of Liquids, Lohr Arthur Burkardt
A Method Of Determining The Relative Thermal Conductivities Of Liquids, Lohr Arthur Burkardt
Bachelors’ Theses
This thesis concerns the development of apparatus suitable for the practical determination of the thermal conductivity of liquids. The data presented in the literature refers to the determination of absolute conductivity values and-is very unsatisfactory from a practical point of view. The aim here has not been to furnish absolute data, but to provide a simple means of determining the relative conductivity of any series of liquids. Knowing such a set of relative conductivities, absolute values can readily be calculated therefrom.
The aim has been to develop an apparatus that is simple enough to be constructed in the ordinary laboratory, …
The Melting Points Of Bismuth - Zinc - Tin Alloys By The Cooling Curve Method, Siegfried Kulbacki
The Melting Points Of Bismuth - Zinc - Tin Alloys By The Cooling Curve Method, Siegfried Kulbacki
Bachelors’ Theses
Undoubtedly, the properties of a metal which contribute to its general usefulness consist of hardness, tenacity, elasticity, malleability, ductility, density, fusibility, expansion by heat, resistance to corrosion and conductivity for heat and electricity.