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Test. 469: Minneapolis-Moline Bf, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

The Peroxide Numbers Of Vegetable Oils, Robert J. Bruce

Bachelors’ Theses

A survey of the literature will indicate that the peroxide numbers of fats and oils are of importance in ii many industries. The dairy, fish oil, vegetable oil, and meat processing industries all have use for peroxide number determinations. as a measure of the degree of rancidity of their products. The paint industry has used it in the study of protective coatings, and the textile industry has used it in the study of the lubrication of fibers. All of these uses were applied to the study of partial oxidation of the samples under consideration.

Since the various methods in use …

Solubility Product Constants Of The Metallic Sulfides, Marvin Bernard Gordon

Theses and Dissertations

A survey of the chemical literature revealed a lack of agreement in the values reported by various investigators for the solubility product constants of the metallic sulfides. The object of this thesis was to obtain a reliable set of solubility product constant values for the metallic sulfides by means of thermodynamic calculations. Of considerable importance in calculating the values of the solubility product constants of the metallic sulfides is the value of the standard free energy of formation of the sulfide ion. A critical review of the values that have been reported by various investigators for this constant , including …

Test. 465: Allis-Chalmers Hd-20, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test .464: Allis-Chalmers Hd-15, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

The Identification Of Various Halogen Compounds Through Formation Of Quaternary Ammonium Salts, Kenneth E. Miller

Bachelors’ Theses

When, in the process of characterizing an organic compound, the compound has been definitely placed in one certain class, such as acids or alcohols, and all but a certain number of the compounds in the class have been eliminated by physical constants or functional groups, the final step is the preparation of suitable derivatives. If, however, the unknown falls into a class of compounds of such chemical nature that preparation of deriyatives is impossible, or, at the least, difficult, then the identification must depend entirely upon physical constants. This is frequency the case with alkyl halides. They must be identified …

Studies On Derivatives Of 3-Ethylphenanthrene, Eugene R. Miller

Bachelors’ Theses

The following thesis was undertaken to study the derivatives of 3 etbyl-phenanthrene. The problem was undertaken to familiarize the author with polynuclear aromatic hydrocarbons and the various reactions and unit processes which are involved in the synthesis or these derivatives. It is hoped that the experience gained in pursuing the objective of this thesis will provide a background which may prove valuable in future work tor an advanced degree and ultimately help to secure a position in some phase of research work dealing with biological compounds containing the phenanthrene configuration in its nucleus.

The Synthesis Of 3-Ethyl-9-Acetylphenanthrene, Elizabeth R. Bender

Bachelors’ Theses

In 1929 , there was recognized a relatively small number of naturally occurring phenanthrene compounds as compared with those known today. These compounds include several groups of substances which are as strikingly similar in structure as they are different in their actions on the animal organism. For instance, the structure of the sterols and bile acids contain the perhydrocyclopentenophenanthrene ring system. Upon later research, it was found that the sex hormones and cardiac glycosides (heart poisons secreted by toads) have a structure very similar to this system. They are all derivatives of cyclopentenophenanthrene.

The Influence Of Copper Upon The Age Hardening Properties Of Steel, Andre Rey

Bachelors Theses and Reports, 1928 - 1970

The virtues of alloy steels have been widely publi­cized in both technical literature and everyday adver­tising. Nearly everyone possessing a slight knowledge of metallurgy knows the beneficial effects of chromium in the manufacture of stainless steels, or the importance of nickel, molybdenum, vanadium, and other common elements used to alloy steels.

The Gallium-Indium Constitutional Diagram, Richard E. Gaffney

Bachelors Theses and Reports, 1928 - 1970

Because of the discrepancy as to whether there is solid solubility in the gallium-indium system, and the fact that no alloys with less than 1% indium were ever investigated; the possibility of solid solubility in either or both ends of the diagram was not overlooked. According to Hume-Rothery, two alloys with the same relative positions on the Periodic Chart should have about the same alloying habits.

Determination Of The Activities Of Indium And Mercury And The Vapor Pressures Of Mercury Over These Amalgams From 0.00216 To 0.02494 Mole Fraction Indium At 25 C And From 0.00067 To 0.02410 Mole Fraction Indium At 70 C By Electromotive Force Measurements, Arthur H. Lutts

Bachelors Theses and Reports, 1928 - 1970

This work was performed to determine by experimental means the activities of both indium and mercury and the vapor pressures of mercury over these amalgams at 25 and 70 C.

A Determination Of Reflectivity Of Opaque Ore Minerals With A Weston Ii Light Meter, Louis L. Bergan

Bachelors Theses and Reports, 1928 - 1970

Measurements of reflectivity of opaque ore minerals can be made with the common photographic light meter and a standard reflecting microscope, both of which are available to most Geology laboratories. During the course of the investigation, approximately 30 minerals were examined, of which 10 were duplicates. Comparable results, for the most part within 3% of previously determined valued, were obtained.

Rate Of Reaction And Order Of The Esterification Of Propylene Glycol With Acetic Acid, Thrygve R. Meeker

Chemistry Honors Papers

This 18 page thesis examines the determination of order and specific reaction rate of esterification of propylene glycol with acetic acid at forty degrees centigrade.

Stability And Concentration Effects In The Use Of Siloxene As A Chemiluminescent Indicator In Redox Titrations, William F. Burkhardt

Chemistry Honors Papers

This 22 page thesis attempts to determine the limitations of, and to extend the applicability of siloxene as a chemiluminescent indicator in redox titrations.

The Construction Of A Ferromagnetic Torsion Balance, Elliott Willner

Bachelors Theses and Reports, 1928 - 1970

The construction of the apparatus was performed entirely in the machine shops at the Montana School of Mines. The materials utilized in the construction were obtained through the courtesy of many sources: the A. C. M. Co., the Montana Power Co., and the Western Iron Works.

The Saponification And Chlorine Determination Of Alkyl Chlorobenzoates To Determine Their Identity And Purity, Joan Bardele

Bachelors’ Theses

Many of the present reagents tor the preparation of alco­hol derivatives are deficient in at least one respect. A preparative investigation was made by Mr. Robert Johnson of alkyl chlorobenzoates, by substitution of benzoyl chlorides on aloohols, since various benzoyl chlorides are now available com­mercially. Mr. Johnson presented a thesis on the "Preparation of Alkyl Chlorobenzoates And Their Application As Alcohol Derivatives". As a result or his work thirty eaters previously not reported in literature were prepared and their melting points and boiling points and refractive indices determined.

In order to give an indication of the identity and purity ot …

Preparation Of 3-Methylphenanthrene, Yvonne C. Bestler

Bachelors’ Theses

The year 1929 witnessed the opening expansion of the previously small list of naturally occurring phenanthrene compounds. The new groups of substances included were as strikingly different in their actions on animal organisms as they were similar in structure.

A Modified Micro Isoteniscope For Measuring Vapor Pressure, Arthur J. Bates

Bachelors’ Theses

A survey of literature will show that the vapor pressures of many substances have not been determined. A probable reason tor this lack of available data might be that the instrumentation needed for these measurements have been quite complex and required highly skilled personnel for its performance.

Vapor-pressure measurements are important in all distillation problems and in the calculation of certain other physical properties. They are used in the correction of boiling points and in the recovery of solvents. The concen­tration of vapor in the gas phase may be regulated effectively by controlling the temperature of the liquid. Humidity conditions, …

The Freezing Point Of Water In Puddled And Unpuddled Soils At Different Soil Moisture Tension Values, Robert B. Campbell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A technique that will adequately describe the physical condition of water in the soil has long been desired by scientists. The method should include the effect of soluble materials on the osmotic pressure of the soil solution, and also the effect of surface force action between the soil and soil water.

Parker (8) demonstrated that the freezing point was reduced in the presence of finely divided material. This suggested the possibility of using the cryoscopic procedure to measure the physical condition of water soil. More recently, the introduction of Thermistors for accurate temperature measurement have made it desirable to investigate …

Test 455: Massey-Harris Model 55, Nebraska Tractor Test Lab

Nebraska Tractor Tests

This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …

Diffusion Through A Membrane, Marvin E. Wyman

Journal of the Minnesota Academy of Science

No abstract provided.

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 …

Note Concerning Cloud Chamber Experiments With Positrons, H. M. Schwartz

Journal of the Arkansas Academy of Science

No abstract provided.

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.

Determination Of Saponification Rate By Change In Hydrogen Ion Concentration Measured With Quinhydrone And Glass Electrodes, Richard Porter

Bachelors’ Theses

The measurement or hydrogen ion concentration is becoming more important in all the fields of chemistry since the states or many chemical systems can to some extent be defined by their hydrogen ion concentration. If the hydrogen ion concentration or a particular solution can be measured accurately, in many cases other important relations and quantities may be determined. Methods or measurement are therefore important instruments or investigation.

When an ester is saponified by an alkali, the hydrogen ion concentration increases as the reaction proceeds. Thus, it the hydrogen ion concentration can be calculated at different intervals of time, some knowledge …

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 …

Integrated Scattering Of Microwaves By Small Metal Spheres, A. L. Merts

Masters Theses

"When electromagnetic radiation falls upon a material body of any kind, the associated electric field induces periodic oscillations of the electrons of the material synchronous with the incident radiation. The material serves as a secondary source and emits energy in the form of scattered radiation with a frequency equal to that of the incident electromagnetic wave. The polarization and intensity of the scattered radiation are determined by the size, shape, electric constants, and interactions among the scattering elements.

The scattering of electromagnetic waves is an old problem in physics. Such names as Rayleigh, Debye, and Mie have become associated with …

A Stratigraphic Study Of Fusulinid Foraminifera In The Cherokee Group (Pennsylvanian) Of Western Missouri And Kansas, Ralph Orlansky

Masters Theses

"Limestones or shaly limestones, from four stratigraphic levels in the Cherokee group (Desmoinesian series) of Missouri and Kansas, contain eight species and two varieties of fusulinid foraminifera, of which four species and two varieties are new, and one ophthalmidiid foraminiferal species (Hemigordius cf. regularis Plummer). The next to highest limestone (cap rock of the Fleming coal) is correlated with the Seahorne limestone of western Illinois, the Stonefort limestone of southern Illinois, and the Munterville limestone of Iowa. Hemigordius regularis, a limestone facies foraminifer apparently marks a correlatable interval in the Ardmore limestone. Descriptions of the fusulinids and the …

Test 467: Oliver Row-Crop 66 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test .463 :Allis Chalmers Hd-9, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.