Physical Sciences and Mathematics Commons^™

The Dipole Moments Of A Series Of N, N-Diphenylbenzamides, James William Cooke

Master's Theses

In recent years amides have been used in synthetic fibers, plastics and in medicinal chemistry. Under­ standably, the literature contains many preparations and reactions of unsubstituted, monosubstituted and disubstituted amides, however, their structure has received very little attention. The information avail­ able on the amide group structure originates from studies made on the unsubstituted and mono substituted compounds. The phenomenon of association of the amides has received considerable attention.

Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Year-round field studies of the com position and ecology of stream communities associated with the purification of organic wastes in streams were initiated on Lytle Creek in October, 1949. This creek, which is located about 45 miles northeast of Cincinnati, Ohio, is a tributary of the Little Miami River. Its drainage basin comprises 27 sq. mi., a third of which is contained within the city limits of Wilmington, Ohio, a city of some 7,412 persons

Amperometric Titrations Using A Rotating Platinum-Wire Electrode, James E. Buckley

Bachelors’ Theses

This thesis is an outgrowth of a desire to do precise analytical work with the use of an instrument that would be simple to operate and yet give reproducible results. It is based largely on a method of precipitation titration in those solutions where an internal indicator could not be used feasible because the concentration of the desirable ion was either to low, or the solution too turbid.

My choice of using the platinum microelectrode in these titrations was based on the fact that this electrode could be easily assembled, and take little effort to maintain. It also is advantageous …

Test 579: Minneapolis-Moline 445 Utility, 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 …

Test 578: Minneapolis-Moline 445 Universal, 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 …

A Correlation Of The Catalytic Activity Of Various Mixtures Of Rhenium And Molybdenum Sulfides In Liquid-Phase Hydrogenation Of Certain Reducible Organic Groups, Li-Chen Hsu

Theses and Dissertations

The promoter action of mixtures of catalysts has been reported in literature to be valuable in industries. Whether mixtures of rhenium and molybdenum sulfides would have promoter actions in the hydrogenations of certain reducible organic groups was the main object of this research. Mixtures of rhenium and molybdenum sulfides of various compositions were prepared by three different methods, i.e., (a) by saturating perrhenate and molybdate with hydrogen sulfide in hydrochloric acid solutions, (b) in ammonium hydroxide solutions followed by acidification, and (c) by treating perrhenate and molybdate with thiosulfate in dilute sulfuric acids followed by extraction with toluene to remove …

Test 577: Massey-Harris 333 (Diesel), 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 …

Test 576: Massey-Harris 444 (Diesel), 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 …

Tetrazolium Salts, Andrew Garnett Richardson

Master's Theses

Tetrazolium salts, as the name indicates, are quartenary. Substitution is possible on positions 2, 3, and 5 of the ring as is shown in type formula (I). When these substituent groups are bifunctional ditetrazolium salts of types (II), (III), and (IV) result. Compounds bridged at both R' and R'' at the same time are theoretical possible, but no such cases have been reported, probably on account of the practical limitations of synthesis. The anion, which is indicated by X, may be halide, sulfate, acetate, picrate, succinate, thiocyanate, or practically any atom or group capable of existing as a negative ion.

A New Apparatus For Paper Electrophoresis, Robert John Hodges

Honors Theses

In paper electrophoresis, taking the idealized case, a charged particle, i.e. a particle which has an excess or deficiency of electrons, resulting in a net electrostatic charge is placed on a strip of moistened filter paper. The moistening is usually done by a buffer solution which serves two purposes: 1. It provides a liquid phase within the structure of the paper through which the particle can travel. 2. It keeps a constant pH throughout the run. After experimenting with several types of apparatus the author decided that a new type of apparatus was needed and could be designed which would …

The Study Of Kojic Acid As A Chelating Agent For Cadium Analysis, Norman Elliot Conger

Honors Theses

The absorption spectra of kojic acid and of cadmium kojate in various solvents have been obtained. From this data, the suitability of kojic acid as a possible analytical reagent for the determination of very small amounts of cadmium in water using ultraviolet absorption methods is discussed. Kojic acid is found to be not suitable for analysis of cadmium using ultraviolet absorption methods.

Various Regular And Irregular Precipitate Structures In Gelatin Gels, Martin Stanley Ferguson

Honors Theses

In the field of Colloid Chemistry, precipitate structures in gels have been studied for quite sometime. The formation of a rhythmic band configuration known as Liesegang rings, when an insoluble salt is formed by the gradual diffusion of one ion into a gel containing the other ion has become a common phenomenon. At the outset of this research project, the primary intent was to continue the work of R. DeSieno into a somewhat different regular structure obtained by ionic diffusion in the presence of mercury vapor. This phenomenon to be studied involves the formation and nature of radial lines produced …

Addition Of Tricholorsilane To Isocyanate Radical, Robert Hugh Maliner

Honors Theses

The purpose of this investigation is to synthesize an organo-silicon compound.

A Study Of Applications Of The Heat Of Reaction To Analytical Determinations, David Lawrence Thurber

Honors Theses

The purpose of the paper is to summarize the major problems of designing apparatus, and to discuss solutions for some of these, and suggest solutions for others. An attempt has been made to extend the versatility of the method in regard to the technique of titration, the idea being that coulemetric delivery as well as volumetric delivery of reagents might be used.

An Attempt To Improve Certain Physical And Chemical Properties Of Concrete Through The Use Of Various Organic Polymers, Robert Lehrer

Honors Theses

Through the incorporation of various organic polymeric substances into several kinds of concrete mixes, we have attempted to produce a mixture which offered more than the usual resistance to corrosion by water and acid.

Photo-Oxidations Sensitized By Physiologically Important Substances, Ernel D. Ihnen

Theses and Dissertations

A study of the photo-oxidation of the 2,6-dichlorophenol indophenol-ascorbic couple was undertaken with a view to investigating the postulated mechanism of oxidation by a component of the oxygen evolving sequence operative in photosynthesis. A spectrophotometric method for the measurement of the progress of photo-oxidation was developed. Temperature and pH dependence were determined and the effect of various common inhibitors and physiological substances tested. None of the common Hill reaction inhibitors were effective in the ascorbic acid photo-oxidation in the system used. KCN and catalase as well as a few other high molecular weight proteins were able to inhibit dark auto-oxidation …

The Vertical Gradients Of Ozone Concentration And Its Relation To The Eddy Coefficient Of Diffusion, Joseph Levine

Physics & Astronomy ETDs

The purpose of this thesis is to apply this method to a tentative evaluation of the eddy coefficient of diffusion. Actually the investigation was more specifically an attempt to relate the difference in ozone concentration between the two stations to the average wind shear and to the vertical thermal stability.

Geology Of The Rinconada Canyon Area, Valencia County, New Mexico., John Mohar Jr.

Earth and Planetary Sciences ETDs

Within this area are found two small domes superimposed upon the McCarty syncline. North dome, the larger of the two, is located at the head of Rinconada Canyon. South dome is located in the southern part of the area near the mouth of the canyon. Thus far the mineral resources of the area have been of little economic value. There are, however, large deposits of commercial uranium deposit at depth which cannot be disregarded.

A Study Of Isotopic Exchange Between Potassium Iodide And Benzyl Iodide. Solvent Effects, Joseph A. Leary

Chemistry and Chemical Biology ETDs

The kinetics of the isotopic exchange reaction between potassium iodide and benzyl iodide in alcoholic solution has been studied thoroughly by Stillson. It was reported that the reaction was much faster in ethanol-acetone mixtures than in absolute ethanol. However, it was not possible to determine whether this was due to acceleration of the reaction by acetone, or to inhibition by ethanol.

The purpose of this investigation was to elucidate further the effect of various solvents on the same exchange reaction. The isotopic exchange reaction between potassium iodide and p-nitrobenzyl iodide was also studied, because it had been investigated in alcoholic …

Geology And Ground-Water Resources Of The Portales Valley Area, Roosevelt And Curry Counties, New Mexico, Sherman E. Galloway

Earth and Planetary Sciences ETDs

Since 1910, and particularly since the closing years of World War II, considerable development of the ground water occurring in the valley fill has been made for irrigation purposes. This increase in development has resulted in a progressive decline of the water levels in this area. The results of this study indicate that the water occurring in the valley fill is the only water of good chemical quality occurring in the Portales Valley that can be obtained in quantities that are sufficient for normal irrigation, municipal, industrial, stock, and domestic uses, and that if the present rate of ground water …

Beta And Gamma Distributions, Calvin Rogers

Mathematics & Statistics ETDs

The purpose of this paper is to exhibit the main properties of Gamma and Beta distributions and show their relation to certain well known distributions.

In chapter II the Gamma and Beta distributions are defined in terms of Gamma and Beta functions. The moments of these distributions are calculated, and the moment generating function and cumulant generating function for the Gamma distribution are obtained. The curves are classified with respect to parameter values and the curves are graphically illustrated in Figures 1, 2, and 3. The exponential distribution, as a special case of interest, is shown to be a Gamma …

Geology Of The Central Front Of The Fra Cristobal Mountains, Sierra County, New Mexico, Richard C. Jacobs

Earth and Planetary Sciences ETDs

This report includes about seven square miles of the central front of the Fra Cristobal Mountains. The area contains rocks from Precambrian, Cambrian, Pennsylvanian, and Quaternary Age. Fragmentary exposures of the Permian sedimentary rocks are also present.

Geology Of The White Rock Mountain Area, Gunnison County, Colorado, David L. Gaskill

Earth and Planetary Sciences ETDs

The White Rock Mountain area in central-western Colorado is included in the northwest corner of the Crested Butte quadrangle and the extreme southwest corner of the Aspen quadrangle. Mineral deposits were recognized in the early seventies, and in the literature the area is referred to as the Elk Mountain District.

The Use Of Kamke's Transformation In Approximating The Zeros Of Orthogonal Polynomials, Robert L. Daniels

Mathematics & Statistics ETDs

The importance of the classical orthogonal polynomials has long been acknowledged. It has not been possible, however, to represent them in such a way that all of their important properties are immediately evident. In particular, the location of the zeros of these polynomials is of considerable interest.

This thesis is primarily concerned with a different technique in which Kamke's transformation is applied to the differential equations frequently used to define these polynomials. The resulting trigonometric differential equations cannot be explicitly solved either, but certain characteristics of these solutions facilitate the derivation of approximations to the zeroes of the solutions.

Geology Of The Canjilon Cauldron Sink Near Bernalillo, Sandoval County, New Mexico, Felix E. Mutschler

Earth and Planetary Sciences ETDs

Canjilon Hill is located on the west side of the Rio Grande, about 2 3/4 miles north-northwest of Bernalillo. Exposed on the hill is a local unit of breccia, conglomerate, and sandstone, which forms an elongate saucer-shaped body 4100 feet long, 2200 feet wide and 280 to 500+ feet thick. Unlike the underlying Santa Fe formation these strata contain an abundance of large angular basalt pebbles, cobbles, and boulders. In this paper these strata are termed the Canjilon formation of the Santa Fe group. Structural and sedimentological evidence suggest that the Canjilon formation was deposited in a subsidence depression initiated …

The Motion Of A Charged Particle In Homogenous Time-Varying Magnetic Field, Thomas R. Bates

Physics & Astronomy ETDs

This paper will discuss the motion of a non-relativistic, non-radiating charged particle in an infinite homogeneous magnetic field which varies linearly with time. We shall assume the motion to be confined to a plane perpendicular to the magnetic field.

An Indicator Of Position With Respect To The Earth's Magnetic Field, Lloyd C. Nielsen

Physics & Astronomy ETDs

A large amount of experimental research in the field of atmospheric physics involves carrying apparatus aloft by means of balloons. Data from balloon-borne instruments may be obtained either by recovery of the apparatus or by radio telemetering during the flight. Of these two methods, the latter is of course the more convenient and reliable, since recovery of the apparatus is time-consuming and often impossible.

Paleozoic Stratigraphy Of The Mud Springs Mountains, Sierra County, New Mexico, John Davis Hill

Earth and Planetary Sciences ETDs

This thesis gives a history of the terminology of each of the formations found in the Mud Springs Mountains as well as a discussion of the characteristics of each. The Mud Springs Mountains Section of Paleozoic rocks is 3660 feet thick. Parts of all the Paleozoic systems are represented except the Silurian and Mississippian. The Bliss sandstone is 145 feet thick, the lower 65 feet being late Cambrian and the upper 80 feet being early Ordovician. The El Paso limestone of early Ordovician age is 460 feet thick.

Test 575: Mccormick Farmall Cub, 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 …

Calorimetric Heats Of Mixing Of Some Nonelectrolytic Binary And Ternary Solutions, James Bevan Ott

Theses and Dissertations

The heat of mixing of nonelectrolytic liquids is important in predicting the type of molecular interactions which exist in solutions of nonelectrolyted. The problem was to construct a calorimeter in which these heats of mixing could be measured accurately. Once constructed, the calorimeter was used to measure the heats of mixing of some binary and a ternary solutions. The systems chosen for study were the three liquid pairs formed between benzane, carbon tetrachloride, and cyclohexane, and the ternary mixture of the three. The results of the experimentation are summarized by the following equations. (1) H_12^M = X_1x_2 [103.2 + 13.1(x_1 …