Physical Sciences and Mathematics Commons^™

Nebraska In Relation To The Problems Of Pleistocene Stratigraphy, Alvin Leonard Lugn

Department of Earth and Atmospheric Sciences: Faculty Publications

Nebraska is so peculiarly situated with respect to Pleistocene deposits of glacial, fluviatile, and eolian origin that it holds the key to the solution of many important problems of the stratigraphy of that period. A brief outline of the Pleistocene geology of Nebraska with several illustrations is followed by a statement of and brief discussion of several of these problems. The main problems touched upon are: age of the Loveland loess, Pleistocene classification, correlation with Europe, the need for a better understanding of what is meant by "glacial" and "interglacial," the problem of glacial and interglacial loess, the duration of …

Fermentation Of Sugar Acids By Bacteria, Gordon B. Robbins, Keith H. Lewis

Chemistry Department: Faculty Publications

Bacterial fermentation of the sugar acids has received little attention in comparison with the wide-spread use of the common aldoses and sugar alcohols. These acids, and especially their sodium salts, are well suited to bacteriological techniques because of their solubility and heat stability, yet their usefulness for investigating the relationship of chemical structure to biological utilization has only recently been recognized. Their application to systematic differentiation of bacteria has also been neglected.

Kendall, Bly and Haner (1923) concluded from a study of three monocarboxylic acids and three dicarboxylic acids that these compounds possessed little value for the differentiation of bacterial …

A Comparative Study Of The Proteolytic Activity Of Trypsin On Various Gelatins, Louis Hinkle Coggs

Bachelors’ Theses

Since 1839, the viscosity of liquids has been measured by means of capillary tubes. However, it was not until the year 1846, that the results of Poiaeu1lle's research were :made known to the public. Because of the comprehensiveness of Poiseuille's work, the concept of the laws controlling viscometry flow is attributed to him. For one hundred rears the subject of viscometry has been studied by many. During these years the principle a propounded by Poiseuille have been verified in general, but various corrections and modifications of viscometers in regard to drainage, surface tension, liquid head, and kinetic energy have been …

A Remedial Program In The Four Fundamental Operations In Decimal Fractions, Hallie Ruth Weber

Master's Theses

Can the results of the teaching of the four fundamental operations in arithmetic be improved? This is an important question that confronts most teachers of arithmetic. How can the teacher eliminate the difficulties which interfere with pupil progress, and reduce the number of failures in arithmetic? A group diagnostic test will show not only the level of ability of pupils in the various operations, but will point out weaknesses so that the teacher may organize her work in such a way as to give time to those who are below the standard and omit deadening drill for those who are …

A Study Of The Effect Of An Equal Energy Spectrum Upon Metallic Selenium In Vacuo, George Butler Scott

Master's Theses

Since little has been found in the literature, on the effect of a actinic properties on the conductivity of metallic selenium and on its spectral response when possessing these properties, it was thought noteworthy to construct several selenium cells having low and medium dark resistances and to study them with a view of seeking some correlation between their conductivity characteristics and their prismatic response in vacuo.

A Propagation Of Ten Meter Radio Waves By Vertical And By Horizontal Dipole Antennas, James William Haddock

Master's Theses

Radio communication is made possible by means of energy that travels through space from the transmitter to the receiver in the form of electromagnetic waves. These waves move with the velocity of light and differ from visible light only in wave length or frequency. This radiant energy consists of a magnetic field and of an electrostatic field, at right angles to each other and also at right angles to the direction of propagation. Questions explored in this thesis include: 1. Is there a relation between the amount of reflected radio energy and the angle of polarization. 2. If so, which …

Variation Of Moments With Distributions Of Masses And Areas, Mayo Glenwood Shults

Master's Theses

The purpose of this investigation has been to determine the variations of the first, second, third and fourth moments as functions of distributions of masses and areas. These moments were found about a line or plane perpendicular to the horizontal axes of the figures, and at various distances along the axes. For a complete understanding of the problem, an explanation of various terms will be made in relation to mechanics statistics.

Montana Oil Fields, Conrad F. Lundgren

Bachelors Theses and Reports, 1928 - 1970

Since the discovery of oil in Montana in1916, the petroleum industry has advanced to a point where over 5,000,000 barrels of oil worthover $6,500,000 has been produced in each of the three past years (1936, 1937, and 1938).

Gauss' Hypergeometric Equation, William R. Smith

Master's Theses

As early as the seventeenth century the English mathematician, john Wallis (1616-1703), used the term "hypergeometric" to describe a series which he was studying. This series, ∑(a)(a+b)(a+2b)…(a+n-1b), is quite different from the usual geometric series, hence the term, "hyper" (=above) plus "geometric," was used to signify that the series was of greater complexity than the geometric series. Wallis did not consider his series a power series or a function of x.

In 1769 this series received a remarkable development at the hands of Loonhard Euler who, following the example of Wallis, applied the word "hypergeometric" to it. He observed that …

Effect Of Organic Matter Decomposition On The Solubility And Fixation Of Phosphorus In Alkaline Soils, H. F. Rhoades

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

It is the purpose of this bulletin to report a laboratory study on the effects of organic matter decomposition on the solubility and fixation of phosphorus in alkaline soils. The study included the following: (1) a comparison of the effects of a decomposing organic material with those of a physiologically acid nitrogen fertilizer, and (2) a comparison of the effects of different organic materials of varying phosphorus contents.

A Study Of The Temperature Of The Vapor Above A Boiling Salt Solution, John Andrew Palm

Honors Theses

The results obtained with the apparatus seemed to be quite conclusive that the temperature of the vapor above a boiling salt solution is the same as the temperature of the pure solvent.

Studies On Silicic Acid Gels: Measurements On Surface Tension During Setting, Louis Werthman

Honors Theses

In this paper, results will be presented to show the change in surface tension during gelation of silicic acid solution. This research was undertaken with the belief that the change in surface tension during gelation might give further insight into the process of gel formation.

The Regulation Of Silicic Acid Gels, Louis W. Thompson Jr

Honors Theses

The discovery of Hurd and Griffith, that a silicic acid gel will regel after breaking up and washing, is not true thixotropy, but it would be of interest to study this. This paper is concerned with just this matter, the regulation of silicic acid gels.

The Relation Between The Concentration Of Silica And Time Of Set At Constant Ph, Howard Sheffer

Honors Theses

Silicic acid gels result from practically any sol of hydrated silica, merely with the lapse of time. The gel must, however, contain a large enough concentration of silica to give sufficient strength or rigidity for the gel to set. A sol which contains less than .5 percent SiO2 will give a very weak gel, or no gel at all. Sols which are strongly alkaline will not set at all.

The Formation Of Silicic Acid Gels In Very Strongly Acid Solutions, Raymond William Barclay

Honors Theses

In the past few years much work has been done at Union College in attempting to determine the mechanism of the setting of silicic acid gels. All of this work, however, had been done in alkaline, weakly acid, or moderately acid solutions, and practically no investigation of silicic acid gels in very strongly acid solutions has been made. The purpose of this research was to undertake such an investigation The effect of temperature and pH upon the time of set was studies. Three different temperatures were used, and the pH of all gels are studied was below 1. Concentrated hydrochloric …

Gels Of Hydrated Titanium Dioxide, David Wright Godfrey

Honors Theses

In 1823, Rose (1) reported the preparation of a week structured titania jelly by the treatment if fusion of sodium carbonate and titanium dioxide wit hydrochloric acid. In 1938, Jacober (3) prepared weak titania jellies by a method similar to that used by Klosky and Marzano. Furthering this previous research, Jacober went on to demonstrate that titanium, as might be expected from its close similarity to silicon and its position in the same periodic family, shows a linear relation between the reciprocal of absolute temperature and the logarithm of the time of set of its gels, as silicon does.

Heats Of Solution In Liquid Ammonia, Herbert F. Zuhr

Honors Theses

This paper will present the heat of solution of methyl ammonium chloride as a function of the concentration at -33 degrees. The heats of other amine and imine hydrochlorides, organic salts will also be included, as will the preparation of certain organic salts and calibration data.

Upon The Asymptotic Representation Of Entire Functions Where The General Coefficient Is The Product Of Two Gamma Functions, James R. Ellis

Mathematics & Statistics ETDs

The essential purpose of this paper is to obtain further information in regard to the asymptotic representation of a power series.

The Determination, Analysis, Or Assay Of Sodium Nitrite, William Ellenbogen

Chemistry Honors Papers

This five page thesis examines the determination of sodium nitrite through volumetric and gravimetric analyses.

The Segregation Of Real Roots Of Lower Orders, Ross W. Bland

Master's Theses

The purpose of this thesis is the presentation of the better algebraic methods of the segregation of real roots of equations of lower orders and a brief historical sketch of the advance made in the development of algebra. Mention is also made of a few of the men who have made notable contributions to this field of mathematics and the time, as nearly as it is possible to determine it, when new ideas were discovered.

Linearity In Factor Analysis, Opal Emmons

Master's Theses

The uniqueness of mathematics in that it is a science complete in itself makes it possible to apply mathematical tools to sciences which, in themselves vary widely in content. There is, however, a particular difficulty which must be surmounted. A given mathematical procedure may be valid in the science of mathematics but invalid in another science, such as psychology. The reason for this is that sometimes there is a discrepancy between the implicit assumptions in the field of mathematics and those implicit in the field of application. The purpose of this investigation is twofold: (1) To point out that linearity …

The Age Hardening Of Silver With Copper-Silicide, Joseph Edward Shaw

Bachelors Theses and Reports, 1928 - 1970

The successful application of the phenomenon of pre­cipitation hardening to aluminum and copper has indicated the possibility of hardening all metals in the same way. The phenomenon of age hardening was discoveredin 1911, and since that time much research has been car­ried on in all parts of the world on various alloy sys­tems.

Structure Of Eutectics, Dilip K. Das

Bachelors Theses and Reports, 1928 - 1970

The present paper is a result of work done on the study of structures of eutectics of a certain eutectic-forming binary systems. In this research work no systems with intermetallic compounds have been studied.

Investigation Of A Method For Extraction Of Indium From Zinc Flue Dust., Harold L. Tanner

Bachelors Theses and Reports, 1928 - 1970

In metallurgical practice today some of the relatively rare metal Indium is recovered as a by-product from the ores of other metals. Indium is a soft, silvery—white metal belonging to the third group of the periodic classification. It is situated just above tin in the electrochemical series.

Effect Of Soil Type, Slope, And Surface Conditions On Intake Of Water, F. L. Duley, L. L. Kelly

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

In connection with investigations of runoff and erosion in the Great Plains an attempt has been made by means of artificial applications of water to determine certain principles concerning the effect of different soils and soil conditions on runoff and soil erosion. Such information is needed in planning all field operations dealing with soil erosion and moisture control. It is also needed in connection with watershed studies that are being established in the Central Great Plains, dealing with runoff and flood flows from larger areas. The method employed makes it possible to obtain comparable data on a wide range of …

Igneous Rocks Of The Jardine And Crevasse Mountain Mining Districts., Ray E. Gilbert

Bachelors Theses and Reports, 1928 - 1970

It is surprising to learn that so large a variety of igneous rocks is present in the Jardine and Crevasse Mountain mining districts, a region that is generally thought of as consisting principally of schists.

Electrolytic Manganese, George T. Derana

Bachelors Theses and Reports, 1928 - 1970

The production of metallic manganese by electrolysis is of potential value for the recovery of this strategic metal from domestic deposits. These deposits are largely unsuitable for the production of ferromanganese, but they are amenable to low-cost leaching processes.

The Age Hardening Of Copper With Manganese Silicide., Gordon A. Davis

Bachelors Theses and Reports, 1928 - 1970

The increase in hardness is attributed to the manganese silicide being precipitated from solid solution and deposited between crystal planes. The subsequent softening which occurs on prolonging the period of reheating is believed to be due to an agglomeration of the dispersed hardening agent.

Glaciation In The Logan Quadrangle, Utah, J. Llewellyn Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

That the higher valleys of the Wasatch Mountains were occupied by Pleistocene glaciers has long been known. King, Hague, and Emmons, geologists of the Fortieth Parallel Survey, the first to undertake a systematic study of any part of the Wasatch Mountains, recognized this fact and their report includes a map which shows in a rough way the extent of the glaciated areas in the Central Wasatch (11 ). In 1909 Atwood (1) made a detailed study of the glacial features of the Central Wasatch in connection with his study of glaciation in the Uinta Mountains. He mapped the deposits of …

Heats Of Solution In Liquid Ammonia, Joseph Sottysiak

Honors Theses

Water, chemically speaking, is the most important individual substance known. Water occupies an outstanding position among solvents. In its capacity as a solvent for salts and as an ionizing agent, it is in a class by itself. Of all known liquids, ammonia most closely resembles water in those properties which make water outstanding among solvents. As a solvent, ammonia is secondary to water, however; many salts insoluble in water dissolve readily in liquid ammonia. Solutions of salts in liquid ammonia are excellent conductors of electricity. Ammonia unites with salts to form ammonia of crystallization. It solvates ions. It is an …