Digital Commons Network^™

Reactions Of N₂F₄ And Sf₆ With H₂ Induced By Co₂ Laser Pulses And By Electrical Discharge, John Leslie Lyman

Theses and Dissertations

A high power pulsed CO_2 laser was used to induce reactions in gas mixtures containing either N_2F_4 or SF_6. The rate of laser induced dissociation of N_2F_4 to NF_2 was as much as 1000 times faster than the thermal rate, and the rate law was of lower order than the thermal, bimolecular rate law. Explosion threshold and induction time data were obtained for butene stabilized mixtures of N_2F_4 and H_2. HF laser gain was observed during the first few microseconds of CO_2 laser pulse, but it was strongly quenched by the explosion. The laser driven reaction of SF_6 with H_2 …

Thermodynamic Equilibrium Formation Constants And Molal Concentrations Of The Complexed Mercury-Containing Species Of Mercuric Chloride In Added Hydrochloric Acid And Methanol-Water Solvent Mixtures, Karl Jennings Walker

Theses and Dissertations

Saturated solutions of mercuric chloride in different methanol-water and hydrochloric acid solvent mixtures were equilibrated at 25.00 ± 0.01°C. Total mercury and free chloride concentrations were determined by analytical procedures and the data were analyzed with the aid of the computer. Tabulated below are the results of this study: [--see thesis for table--]

Finite Conductance Element Method Of Conduction Heat Transfer, E. Clark Lemmon

Theses and Dissertations

One of the basic goals in engineering is to formulate models which will provide a means for analytically predicting observed phenomenon. For some time, the partial differential equations describing the steady state and transient conduction of heat within a solid have been available. However, the straight forward use of these equations is often restricted due to the surface geometry of the solid. If the surface geometry is at all irregular, exact solutions will in general not exist. In that case, a solution is sought by some approximate numerical technique. The two techniques most often used are the finite difference method …

An Aerodynamic Investigation Of The Causes Of Overhead Electrical Transmission Line Gallop, Eric Nathan Skousen

Theses and Dissertations

Overhead electrical transmission lines vibrate due to the action of a prevailing wind. These cable vibrations can be classified into two categories— high-frequency and low-frequency. The high-frequency vibrations, "aeolian" vibrations or "singing wires," is a low-amplitude phenomenon. It has been largely controlled with the use of various mechanical dampers [l, 2],

The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock

Theses and Dissertations

The determination of total thiamin, free thiamin, thiamin di phosphate (TDP) plus thiamin triphosphate (TTP), and total α- hydroxyethylthiamin (HET) levels in rat brain in control, deficient, oxythiamin- (OTH) and pyrithiamin- (PTH) treated rats was accomplished. It was found that the TDP + TTP/thiamin ratio observed in the thiamin-deficient, OTH- and PTH-treated rats was constant and did not differ from the ratio observed in the control rat brains. The brain levels of TDP + TTP decreased to 39% and 12% of the control thiamin levels in deficient and PTH-treated rats respectively. The brain HET and TDP + TTP levels of …

Measurement And Analysis Of Data In Turbulent And Transition Regions Of Two-Phase Flow, Akula Venkatram

Theses and Dissertations

The main aim of the project was to examine the possibility of using the hot wire anemometer to detect particles in a fluid. It was hoped that the presence of the particles would affect the autocorrelation plot and the energy spectrum of the velocities measured in the fluid.

Independence, Gary A. Lidgerding

Theses and Dissertations

No abstract provided.

A Proposed Mechanism Of Action For In Vitro Excystation Of Two Species Of Coccidia, William Ronald Jolley

Theses and Dissertations

Excystation of coccidian oocysts is accomplished in vitro by altering wall permeability with CO2 and a reducing agent, then activating the enclosed sporozoites with a solution of trypsin and bile. Elucidation of the mechanism of action of the CO2-reducing agent treatment was the basic intent of this study. Oocysts of Eimeria stiedae (rabbit) and E. tenella (chicken) were tested for the presence of an excystation-associated enzyme by incubating sporulated oocysts in fluids extracted from variously treated oocysts, and by carbon-14 labelling; the effect of CO2 -reducing agent treatment on oocyst walls was investigated by titration with acid or base for …

The Development Of Business Teacher Education In Canada, 1900-1970., Eleanor Bujea

Theses and Dissertations

No abstract provided.

An Analysis Of The Effects On Speed And Accuracy When Using The Electronic Wallchart As Compared With Traditional Instruction To Introduce The Typewriting Keyboard In Six Selected Ninth-Grade Classes., Wally Marion Guyot

Theses and Dissertations

No abstract provided.

The Effect Of Ethanol Ingestion On Liver Microsomal Phosphatidyl Choline Biosynthesis., David Nelson Skurdal

Theses and Dissertations

No abstract provided.

A History Of The Involvement Of The Church Of Jesus Christ Of Latter-Day Saints In The Tanning Industry In Utah From 1847 To 1973, Paul Edwards Damron

Theses and Dissertations

This thesis reports the extent of the tanning industry in Utah from 1847 to 1973 and explains the relationship of The Church of Jesus Christ of Latter-day Saints with this industry.

The tanning industry was essential to the survival of the pioneer communities in Utah until the coming of the railroad in 1869. Two important factors affecting this industry were external competition and Church support. In fact, the industry survived eastern competition because it was Church-supported. However, all Church support ended in the early 1900's, and except for a few businesses which soon ceased operation, the tanning industry in Utah …

System Identification In Nonlinear Differential Equations By Quasilinearization And Linear Programming, Charles C. Sarabun

Theses and Dissertations

No abstract provided.

The Effect Of Aflatoxin B1 On Growth Rate And Iron Metabolism In Juvenile Mongolian Gerbils (Meriones Unguiculatus), William Stanley Hastings Jr.

Theses and Dissertations

The metabolic secretions from Aspergillus flavus, aflatoxins. are often found as contaminants of agricultural products used for human and animal consumption. Aflatoxin B1 is the most toxic and carcinogenic of the aflatoxins. A reduction in weight gain has been observed when juvenile animals are fed aflatoxin B1 over an extended period of time. This reduction in weight gain may possibly result from an anemic condition induced by an alteration of iron absorption and/or distribution. The effect of chronic sublethal levels of this hepatocarcinogen on weight gain and the uptake and distribution of 59Fe++ were studied in this investigation.

An experimental …

The Lloyd George-Haig Controversy Of World War I : A Study Of Military And Political Control In War, George L. Tupa

Theses and Dissertations

No abstract provided.

A Study Of The Vocational Interests Of Stutterers, Jenine K. Seland

Theses and Dissertations

No abstract provided.

The Separation Of Isomeric Phenols And Their Derivatives By Gas-Liquid Chromatography Using Liquid Crystal Stationary Phases, Ronald Charles Spangelo

Theses and Dissertations

No abstract provided.

Male And Female Student Opinions On Elective Or Required Physical Education Instruction At The University Of North Dakota, Westley E. Weible

Theses and Dissertations

No abstract provided.

An Analytical Assessment Of Vocational Occupational Training Programs In Selected State Correctional Institutions., Daniel Raymond Boyd

Theses and Dissertations

No abstract provided.

Part I: Silver Complexes As Adsorbents In Gas-Solid Chromatography. Part Ii: The Attempted Analysis Of Sulfa Drugs By Gas Chromatography., Samuel Harold Givand

Theses and Dissertations

No abstract provided.

An Analysis Of The Personal Economic Knowledge Of North Dakota High School Juniors And Seniors., Richard L. Hilde

Theses and Dissertations

No abstract provided.

Immediate Introduction To Typewritten Transcription Versus Deferred Introduction To Typewritten Transcription In First-Year Shorthand Classes., John Frederick Keller

Theses and Dissertations

No abstract provided.

High- And Low-Sinuosity Stream Deposits Of The Sentinel Butte Formation (Paleocene) Mckenzie County, North Dakota, Victor B. Cherven

Theses and Dissertations

High-sinuosity channel deposits in the Sentinel Butte Formation occur as elongate, tabular beds of sand that fine upward from an erosional base. The sand beds contain epsilon cross-stratification, within which stratification changes upward from large-scale trough crossstratification to horizontal stratification and small-scale crossstratification, indicating upward decrease in flow regime due to accretion of laterally-migrating point bars. Inset in the sand beds are channelplug deposits that are narrow and arcuate in map view and asymmetrically trough shaped in cross-section, and consist of sandy silt and clay. Lowsinuosity channel deposits occur as elongate, trough-shaped sand beds that fine upward from a deeply-channeled …

Description And Origin Of Carbonate Minerals In The Upper And Lower Cherty Members Of The Biwabik Formation, Minnesota, Leslie R. Honeyman

Theses and Dissertations

This study was done for the Erie Mining Company after periodic problems with the quality of pellets from taconit2 of the Biwabik Formation had been linked to the presence of carbonate minerals. The carbonates found in the cherty members of the Precambrian Biwabik Formation are predominantly siderite, ankerite, and calcite. Siderite is the only primary carbonate mineral and occurs in three forms: microgranular, granular (oolitic), and crystalline aggregates (recrystallized). Ankerite is a secondary mineral occurring as crystalline aggregates and alteration rims on granular siderite. Calcite is found only in fractures and fault zones. Siderite formed from the original precipitate and …

Quaternary Geology Of Sargent County, North Dakota, Dennis N. Neilsen

Theses and Dissertations

Sargent County, in southeastern North Dakota, was glaciated during the Pleistocene Epoch. Objectives of a study of Sargent County were to (1) describe the surface sediment and interpret its origin, (2) correlate, where possible, this sediment with that of adjacent areas, and (3) recon struct the general geologic history of the county for the Quaternary Period.

A geologic map of the county was prepared using field data, topo graphic maps, aerial stereopairs, and soil maps. A map showing surface sediment origin was subsequently made using the available field and laboratory information.

Most of Sargent County is typical rolling prairie underlain …

Stratigraphy And Sedimentary History Of Middle Cenozoic (Oligocene And Miocene) Deposits In North Dakota, William J. Stone

Theses and Dissertations

Middle Cenozoic (Oligocene and Miocene) continental deposits of North America have been most studied in southwestern South Dakota and western Nebraska where the White River Group constitutes a fairly complete Oligocene record, and the Arikaree Group of early Miocene age is commonly the sole remaining record of that epoch. Isolated outcrops in adjacent states also offer opportunities for studying the middle Cenozoic history of the Midcontinent but disagreement as to the physical stratigraphy of such deposits has hindered further work in these areas. The main purpose of this study is to present a viable stratigraphic framework for the middle Cenozoic …

Individualized Instruction: A Model For Teacher Preparation., Thomas Francis Pond Jr.

Theses and Dissertations

No abstract provided.

Parameter Estimation Via Mathematical Programming, John C. Daucsavage

Theses and Dissertations

No abstract provided.

Heavy Minerals Of Glacial Sediments In The Area Of Red Lake Falls, Minnesota, Howard Hobbs

Theses and Dissertations

Pleistocene lithostratigraphic units containing glacial sediments in the Red Lake Falls, Minnesota, area and adjacent areas were studied to determine their heavy-mineral assemolages. Seventy-two samples of fine sand were studied by optical grain-count methods and 77 samples of fine sand were studied by x-ray diffraction methods. Most formations contain a hornblende-garnet-pyroxene-epidote assemblage; the Gervais Formation contains a pyroxene-hornblende assemblage. The mean proportion of the constituent minerals is different in each formation; however, there is overlap in the ranges of heavy mineral proportions among the formations. The Red Lake Falls Formation can be subdivided on the basis of garnet abundance.

Depositional Environments Of The Upper Part Of The Sentinel Butte Formation, Southeastern Mckenzie County, North Dakota, Robert Post Johnson

Theses and Dissertations

The depositional environments of a 40 meter thick interval in the upper part of the Sentinel Butte Formation in southeastern McKenzie County, North Dakota have been determined from the sedimentary structures, geometry, distribution of grain· sizes, and stratigraphic relations of cyclic lithostratigraphic units. The top of the study interval is the top of the upper yellow marker bed.

An elongate, tabular sand bed was studied in detail. It is 12 meters thick and 3 kilometers wide and it is interpreted to have been deposited by lateral accretion in a high-sinuosity stream. Paleo current indicators are parallel to the long axis …