Physical Sciences and Mathematics Commons^™

Analytical Data (1951), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

The Red Cloud Sand And Gravel, A New Pleistocene Formation In Nebraska, C. Bertrand Schultz, Eugene C. Reed, Alvin Leonard Lugn

Department of Earth and Atmospheric Sciences: Faculty Publications

Recent studies of the stratigraphy and paleontology of the Pleistocene of Nebraska have resulted in additional data that require further clarification and partial revision of the Grand Island sand and gravel formation (1,2) in order that there may be no confusion as the result of varying usage of the term.

The Nebraska Geological Survey, the University of Nebraska State Museum, and the Department of Geology at the University of Nebraska have approved the foregoing restriction of the term Grand Island and the adoption of the new name Red Cloud sand and gravel, and these names will be used in future …

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

Nebraska Tractor Tests

No abstract provided.

Enrichment Of Tin Activity Through The Szilard-Chalmers Separation, Herta W. Spano

Chemistry and Chemical Biology ETDs

It was the purpose of this investigation to utilize the Szilard-Chalmers reaction in order to prepare tin solutions of high specific activity.

Tetraphenyl tin was chosen for the target compound. It is a white, crystalline solid of excellent thermal stability. No data have been reported in the literature on the rate of exchange between inorganic forms of tin and tetraphenyl tin but it seemed highly probable that this exchange would be very slow. Tetraphenyl tin is soluble in various organic solvents but insoluble in water, and this suggested solvent extraction as a possible means of separation of the activated tin …

A Sensitive Electronic Photometer Employing Negative Feedback, John Lee Pack

Physics & Astronomy ETDs

Purpose of the Instrument

The instrument to be described in these pages was tentatively intended to be used for the purpose of scanning the night sky automatically for investigations of the zodiacal light. It was to detect light below the noise level of a photomultiplier tube, to have linearity up to signals 100 times greater than the noise level, and to have a response time of about 10-4 seconds.

An Experimental Investigation Of The Dead Time Of Geiger-Mueller Counters, Peter H. Jessner

Physics & Astronomy ETDs

As ever more sensitive and precise experiments are being performed with Geiger Counters, especially in cosmic ray research, the resolving power of these instruments assumes an ever increasing importance. With the present perfection of electronic circuitry, this resolving time has become largely a function of the dead time of the Geiger counter tube itself. It was therefore proposed to investigate methods of reducing this dead time. Only self-quenching counter tubes had to be considered in this connection since the dead time of all other types of Geiger counters is inherently longer.

Investigation Of Penetrating Cosmic-Ray Showers In Water, George William Rollosson

Physics & Astronomy ETDs

In this investigation, some of the properties of the radiation which produces penetrating showers in its passage through matter are studied. Geiger techniques are used to measure the average distance over which the neutral radiation produces one penetrating shower. This distance, called collision length, is measured in water...

The collision length, on the other hand, is measured by placing the material near the apparatus and measuring the mean distance in which one shower is produced and eliminating from the observation any penetrating showers which may be produced subsequently either (a) by the original particle or (b) by the secondaries from …

The Elastic Scattering Of Deuterons By Deuterons, Richard John Runge

Physics & Astronomy ETDs

The concern of this work is the calculation of elastic scattering of deuterons by deuterons. The solution of the problem will be given in the usual center of mass system of coordinates, the conversion of results from this to the laboratory system being standard. Since the deuteron itself consists of a neutron and a proton, the problem is thus one of four bodies. The nuclear three body problem of the scattering of a neutron by a deuteron has been treated by previous authors and we will have occasion to employ methods used by these authors extending them to the four …

Radioactive Disintegration, Robert Katz

Robert Katz Publications

The conventional development of parent-daughter relationships in radioactive disintegration follows the treatment given in Rutherford, Chadwick, and Ellis in which a trial solution of the differential equations appropriate to the process is proposed, and the arbitrary constants are evaluated by application of boundary conditions. At the senior-graduate level at which the first course in nuclear physics is usually taught, the following derivation is believed to be considerably more instructive.

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.

A Graphic Résumé Of The Pleistocene Of Nebraska (With Notes On The Fossil Mammalian Remains), C. Bertrand Schultz, Gilbert C. Lueninghoener, W. D. Frankforter

Bulletin of the University of Nebraska State Museum

I T SEEMS desirable at this time to present a graphic resume of the Nebraska Pleistocene, together with a summary of the stratigraphic sequences of the fossil vertebrates. This report is based on data taken from various publications' in addition to information gathered by the present writers during the past fifteen or more field seasons. Intensive work has been done in the past five years in connection with recovery of paleontological material in the areas where government dams are under construction (Schultz, Lueninghoener, and Frankforter, 1948; Schultz and Frankforter, 1948; Holder and Wike, 1949). The information in the present paper …

2-Pyrrolidinoethyl Esters Of Para Alkoxybenzoic And Para Alkox Alkoxycinnamic Acids, Michael James Fletcher

Master's Theses

One of the most important groups of local anesthetics is the class of alkyl and dialkylaminoalkyl esters of aromatic acids. Of these compounds, the diethylaminoethyl esters are particularly valuable.

It is obvious that pyrrolidine is merely a modified form of diethylamine. The purpose of this work is to learn the effect of substituting the N-pyrrolidyl nucleus for the diethyl amino nucleus in various esters of the local anesthetic type.

Derivatives Of M-Xylene, Henry J. Muller

Chemistry and Chemical Biology ETDs

Since m-xylene of 95-98% purity has recently become available from petroleum, this is an appropriate time to prepare an examine its derivatives. Isophtalic and m-toluic acids can be prepared from the hydrocarbon. The purpose of this work was to prepare imidazolines from these acids

Test .461: International Td-9, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Geology Of The Pre-Cambrian Rocks Of The Northern End Of The Sandia Mountains, Bernalillo And Sandoval Counties, New Mexico, Philip T. Hayes

Earth and Planetary Sciences ETDs

Most of the pre-Cambrian metamorphic rocks of the northern end of the Sandia Mountains crop out on and adjacent to a prominent spur, called the Rincon, which lies to the west of the main mountain mass. These metamorphic rocks which consist of quartzite, schist, and greenstone are considered to be the result of moderate regional metamorphism of clastic sedimentary rocks and possibly some basic flows and stills. These rocks are here tentatively named the Juan Tabo sequence and are Archeozoic or early Proterozoic age. The Sandia granite, which lies to the east and south of the Juan Tabo sequence, was …

Phase Behavior Of Sodium Stearate In Anhydrous Cyclohexane, Walter Edward Reid Jr.

Master's Theses

Soap solutions, aqueous and non-aqueous, are characteristic in that they firm colloidal systems at certain concentrations, the properties of which are influenced by temperature and pressure. Application of the Gibbs phase rule to such systems makes possible the location of the various phases of a particular system and hence enables phase diagrams to be constructed. For systems of soap-hydrocarbons such as are found in fuels, beauty preparations, greases, medical preparations, etc., a phase diagram would show very readily the most satisfactory composition for the conditions desired.

Studies On Some Reactions Of Portland Cement, Edward Shannon Clark

Honors Theses

Studies are made on 1. The mechanism of cement setting, 2. Cement – sawdust mixtures, 3. The effect of soluble compounds on cement, 4. Cement – latex mixtures and 5. Cement – plastic compositions.

Inhibition Of The Thermal Polymerization Of Styrene, Herman Ernst Opitz

Honors Theses

It is the purpose of this thesis to further study the inhibition of the thermal polymerization of styrene along the same lines as Cohen, and wherever necessary to improve and correct his work.

The Effect Of Electrolytes On The Viscosity Of Protein Solutions, Thomas Anthony White

Honors Theses

This project was undertaken to study the Hofmeister series and Loeb's contention that it is incorrect. The protein chosen for study was gelatin. The three salts used were: sodium chloride, sodium acetate and sodium nitrate.

The Reliquefaction Of Zirconia Gels, Hubert Joseph Keily

Honors Theses

The initial reliquefaction of zirconia gels at room temperatures seems to be unique. The following study was made to provide a further description of this phenomenon and to attempt to suggest the nature of it.

A Study Of The Mechanism Of The Reaction Between Styrene And Tung Oil, Rowan Joseph Coyle

Honors Theses

It is the purpose of this thesis to study the possible mechanisms by which styrene may react with tung oil. To this end, styrene is reacted with tung oil, using a peroxide catalyst, the reaction product is separated into its components, and a preliminary analysis of these components is made, in an attempt to determine whether the reaction occurs through a Diels-Alder or a co-polymerization type mechanism.

Electrodeposition Apparatus Employing A Controlled Cathode Potential, Carl Arthur Hirt

Honors Theses

The present work was undertaken with the idea of building a simple electrodeposition apparatus employing a controlled cathode potential so that quantitative separations and determinations of various cations could be made. When finished the apparatus was to be employed in the investigation of electrochemical problems. However, so many difficulties arose in the construction of the apparatus that there was not time available for this latter work.

Catalytic Vapor Phase Ethylation Of Phenol, George Wendell Putman

Honors Theses

The object of this research was to study the reaction between ethyl alcohol and phenol and to try to identify some of the products. Further study of the effect of catalyst on the reaction was also undertaken.

The Ultraviolet Absorption Of Some Nitrogen Heterocycles, Benzotriazole, Benzimidazole, Indazole, Indole, John Edward Fagel Jr.

Honors Theses

The ultraviolet absorption spectra of benzotriazole, 5, (6)-chloro-benzotriazole, benzimidazole, indazole, and indole have been determined in aqueous solutions of varying acidity in the region 210-300 mmu. An attempt has been made to correlate the absorption spectra of these compounds with their molecular structure. The acidic dissociation constants of several of the compounds have been determined graphically from the absorption data.

Progress Report: Chemical Quality Of The Surface Waters In The Loup River Basin, Nebraska, John G. Connor

United States Geological Survey: Publications

The Loup River and its tributaries transport moderate amounts of siliceous minerals from the sand hills region of north-central Nebraska to the Platte River near Columbus, Nebr. Predominant chemical characteristics of these waters are a high percentage of silica, moderate hardness, and a low percentage of sodium. The composition of the Loup River water is influenced by the geologic formations through which ground water, a major contributor to the flows of the Loup River branches, has percolated. Investigation of water quality at or near proposed dam sites in the Loup River basin indicates that if soil and drainage conditions are …

Test .460: Mccormick Farmall Md, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 459: Mccormick Wd-6, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.