Digital Commons Network^™

Electrochemical Kinetic And Mechanistic Study Of Reductive Cleavage Of Phenyl-Substituted Aryl Ethers., Todd A. Thornton

Theses and Dissertations

The electrochemical cleavages of diaryl ethers were studied. The radical anions or dianions of diphenyl ether, 1-phenoxynaphthalene, and 9-phenoxyanthracene were generated electrochemically. The cleavage reaction rates were measured and mechanisms of each cleavage reaction were postulated.Direct reduction of diphenyl ether was observed to be by one-electron at $-2.98$ V vs. SCE. A homogeneous redox catalysis process with acenaphthene as electron mediator was used to determine the rate of cleavage. Cyclic voltammetry was used to acquire peak current data. The radical anion of diphenyl ether was found to cleave by a unimolecular pathway at a rate of 4 $\times$ 10$\sp5$s$\sp{-1}$. A …

Diagenesis And Porosity Development Of The Mission Canyon And Charles Formations (Mississippian), Treetop And Whiskey Joe Fields, North Dakota, Rebecca L. Durall

Theses and Dissertations

Rocks of the upper Mission Canyon and lower Charles Formations (Mississippian) in central Billings County, North Dakota consist of interbedded limestones, dolostones, and anhydrites which were deposited in a shallow epeiric sea. This study was limited to the upper Mission Canyon and lower Charles Formations of Treetop and Whiskey Joe fields, located along the Billings anticline in central Billings County, North Dakota. Close examination of ap~roximately 260 metres (850 feet) of upper Mission Canyon and lower Charles Formations core in the study area resulted in the separation of rocks into six lithotypes: 1) echinoderm wackestone, 2) dolomudstone, 3) neomorphic wackestone, …

A Study Of The Binding Of Copper(Ii)-Amine Complexes To Polyacrylic Acid., Marilyn Elizabeth Martin

Theses and Dissertations

A study of the binding of copper(II)-amine complexes to polyacrylic acid was undertaken. Experimental binding curves were generated for polyacrylic acid having molecular weights of 11,050 and 1600 at an ionic strength of.5M and also at an ionic strength of.1M for the 11,050 molecular weight sample. An analysis of the experimental data indicates that the coordinating species is copper(II)-triamine. The formation curves were fit to analytical binding models and it was found that the higher molecular weight polyions exhibit cooperative behavior. The copper(II)-triamine PAA M$\sb{\rm n}$ 11,050 system at an ionic strength of.5M has seven coordinated ligands with an intrinsic …

A Geography Of Junior High Earth Science Meteorology And Climatology In The United States, Denis E. Mudderman

Theses and Dissertations

No abstract provided.

A Study Of Presentation Style In Audio Teleconferencing, Barbara Jane Mollberg

Theses and Dissertations

No abstract provided.

Effective Rural School Music Teachers: Three Profiles, Michael D. Wohlfeil

Theses and Dissertations

No abstract provided.

John C. Freemont's Expeditions Into Utah: An Historical Analysis Of The Explorer's Contributions And Significance To The Region, Alexander L. Baugh

Theses and Dissertations

John Charles Fremont conducted five expeditions to the West during a period of twelve years (1842-1854). On four occasions, during three of these expeditions (1843-1844, 1845, and 1854), the explorer entered the Utah region. His explorations in northern Utah in 1843 focused primarily on the scientific analysis and survey of the Great Salt Lake. In 1844, Fremont again entered the Utah area and made scientific observations and calculations about the region, including accurately defining the geographic region known as the Great Basin, the name given it by Fremont. In 1845, Fremont proceeded through Utah while enroute to California and spent …

Vapor-Liquid Equilibrium Of Ao4 Solvent, John J. Rolando

Theses and Dissertations

The major purpose of this study was to determine the vapor-liquid equilibrium of A04 (anthracene oil #4) solvent at typical coal liquefaction operating conditions. The experimental apparatus used was the University of North Dakota's single-stage, hot charge, batch autoclave system which was specially designed to simultaneously sample both liquid and vapor phases. Six autoclave runs were made according to the following test matrix: (a) one run to determine the vapor pressure of A04 at temperatures ranging from 20 to 440 C, and (b) five time sample runs to determine the AO4 vapor-liquid equilibrium distribution at temperatures ranging from 300 to …

Major Field Change Of College Students: Academic And Sociological Correlates, Dawn R. Rorvig

Theses and Dissertations

Purpose: The purpose of the study was to identify academic and sociological correlates which may determine speci f ic student populations showing tendencies to change major f ields.

Procedure: The research sample (N = 59 7) consisted of University of North Dakota students who were f i rs t - t ime, full- time students in the 1982 fall semester and who continued enrollment through or graduated by the 198 6 spring semester. These students also had an ACT composite score on record.

Selected information was obtained from the Student Profile Section of the American College Test (ACT) Assessment , …

An Interdisciplinary Curriculum Model For Outdoor Education, Larry L. Lang

Theses and Dissertations

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The primary purpose of this study was to develop an interdisciplinary curriculum model which would improve the conceptualization, of outdoor education by providing a theoretical framework for curriculum development, evaluation, and further research.

In order to create the proposed model, it was necessary to address several related issues. The first phase of the study involved an investigation of current perspectives on outdoor education. Key characteristics and guiding principles were determined to provide a clarification of the substantive structure of this field of study. An analysis and synthesis of the contributions of John Dewey,.L.. B. Sharp, Julian Smith, and other …

Impediments To Teaching Science In Elementary Schools In South-Central Minnesota With Comparisons To Findings Of The National Science Foundation, Edward R. Borchardt

Theses and Dissertations

This study identified and ranked impediments to teaching elementary school science perceived by elementary teachers in south-central Minnesota, examined impediments for common roots, compared current impediments to findings of a 1977 National Science Foundation study, and investigated if the survey device used affected the results obtained in a study.

Public and private elementary school teachers in southcentral Minnesota were surveyed using one of two forms. Survey 1 was a list of impediments generated by 34 teachers and ranked by 104 teachers. Survey 2, administered to 218 teachers, was a revised questionnaire developed by consultation of teachers and other knowledgeable professionals …

An Evaluation Of The Effectiveness Of Return On Investment As A Technique For Plannings And Control, Brenda L. Todd

Theses and Dissertations

No abstract provided.

Computer Aided Drafting, Lou Shi-Jer

Theses and Dissertations

No abstract provided.

Learning Styles And Student Attitudes Towards Social Studies, Joyce S. Fox

Theses and Dissertations

No abstract provided.

A Survey Of Attitudes About Science Fairs In White Shield School, Donald R. Yellowbird

Theses and Dissertations

No abstract provided.

A Combination Of Approaches To The Remediation Of Learning Disabilities, Judith N. Dockter

Theses and Dissertations

No abstract provided.

A Review Of The Good And Grouws Mathematics Program And Its Implementation In The Classroom, Ron Kutz

Theses and Dissertations

No abstract provided.

Guided Fantasy: A Tool For Therapy, Marcia L. Healy

Theses and Dissertations

The purpose of this study was to investigate the feasibility of using instructed guided fantasy to decrease anxiety in a child with juvenile rheumatoid arthritis. It was intended that the child would use guided fantasy to develop an internal coping mechanism for reducing anxiety during a weekly gold shot injection, which was identified as anxiety-producing. An embedded, single-case design was selected for this case study. Qualities of guided fantasy were globally examined. Other aspects of the subject's performance, which were examined included musculoskeletal abilities and limitations, cognitive abilities, ability of the subject to relax via specific relaxation exercises, the subject's …

Identification Of Content And The Development Of Laboratory Experiments Designed To Promote Robotic Literacy For Industrial Education Programs, Steve C. Hsiung

Theses and Dissertations

No abstract provided.

Audit Risk Realization, Craig H. Mell

Theses and Dissertations

No abstract provided.

Identification Of Content And The Development Of Laboratory Experiments Designed To Promote Robotic Literacy For Industrial Education Programs, Steve Chih Hsuing

Theses and Dissertations

The intent of this study is to ascertain the content robotic manufacturers considered most important to be taught in secondary school to promote robotic literacy and to design, construct and test ten laboratory experiments which reflect the content identified.

Free-Form Deformations In A Constructive Solid Geometry Modeling System, Scott R. Parry

Theses and Dissertations

No one will question that computers are revolutionizing the design industry. It is pointed out in [Bezier84] that before CAD/CAM, a surface was defined by tracing cross sections on a drawing and then carving these sections in wood, plastic or metal. The final model was determined by someone interpolating between the sections. This labor intensive art is being replaced by techniques of computer aided geometric design.

A Comparison Of Microcomputer Uses In North Dakota Businesses And Secondary Business Education Programs., Gary D. Hagen

Theses and Dissertations

This study was designed to identify and compare microcomputer uses (for example: generating form letters, doing amortizations, and creating graphics) employed by North Dakota's businesses and taught in North Dakota's secondary business education programs.Two questionnaires, consisting of 46 microcomputer applications (uses), were developed using studies, professional articles, and input from area professionals. One questionnaire was sent to all 278 North Dakota schools having secondary business education programs, and the other to 1,000 randomly selected North Dakota businesses. Education respondents were asked to identify which applications they taught and the amount of time (emphasis) placed on teaching each. Business respondents were …

The Synthesis And Characterization Of Some Thermally Stable Polypyrazoles And Acetylene Terminated Aspartimides, John W. Connell

Theses and Dissertations

Reactions involving the nucleophilic addition cyclization to activated acetylenes have been employed as a novel route to moderate to high molecular weight polymers. Polypyrazoles (PI to P12) have been prepared from the Michael-type addition cyclization of various aromatic dihydrazines to aromatic dipropynones in m-cresol. The aromatic dihydrazines employed were 4, 4'-dihydrazinodiphenyl ether (4,4' -DHDPE), 4,4 '-dihydrazinodiphenylmethane (4, 4'-DHDPM), and 4, 4' -dihydrazinodiphenyl sulfone (4,4'-DHDPS). The dipropynone sutilized were 1,1’- (1,4-phenylene) bis (3-phenyl- 2-propyn-l-one), (l,4 -PPPO), 1,1’ - (1, 3-phenylene) bis (3 -phenyl- 2 -propyn-l-one), (1,3-PPPO), 1,1 '-(1,4 -phenylene) bis (2 -propyn- l-one), (1,4 -PPO), and 1,1’- (1,3 -phenylene) bis (2 …

Differences Inventoried In Academic Achievement For Kindergarten Students Attending School Full Days, Alternate Days, Or Half Days, Every Days, Bonita M. Gurno

Theses and Dissertations

No abstract provided.

Electrochemical Investigation Of The Effects Of Temperature, Ph, And Electrolyte On The Electron Transfer Reactions Of Cytochrome C, Kent Brian Koller

Theses and Dissertations

Spectroelectrochemical and electrochemical methods have been used to investigate the characteristics of heterogeneous electron transfer between cytochrome c and indium oxide electrodes. Direct electron transfer between cytochrome c and solid electrodes is of interest due to the interfacial character of electron transfer between the protein and its membrane-bound physiological redox partners. The conformation of ferricytochrome c is affected more by changes in temperature or pH than is its reduced form, ferrocytochrome c. This difference in conformational stability is attributed to the +1 charge of the heme in ferricytochrome c that is largely embedded in the hydrophobic interior of the enzyme. …

The Effects Of Vertical Acceleration In Mathematics, Amy Willis

Theses and Dissertations

The purpose of this study was to examine the effects of vertical acceleration of students who had taken algebra in the eighth grade. A questionnaire was administered to seniors to determine the attrition rates and their perceived success level in subsequent mathematics courses. All seniors in four high schools in a large school district in Georgia completed the questionnaire. Responses of those seniors who had taken algebra in the eighth grade were analyzed by examining the percentages and frequency counts. The study revealed a high attrition rate for the senior year mathematics course and perceived success levels that were not …

Essay Writing In College Mathematics And Its Effect On Achievement, Gerald Lee Burton

Theses and Dissertations

This experiment was designed to determine the effect essay writing has on learning introductory level college mathematics, learning mathematical skills, problem-solving and mathematical applications, and the retention of new knowledge in mathematics. The independent variable was the writing of essays. Essay writing included responding to questions assigned as homework and addressing mathematical situations presented in in-class activities. The dependent variables were overall achievement, skills, applications, and retention in each of these areas. The sample consisted of five classes of introductory-level algebra at Virginia State University. The experimental group consisted of 50 students in two classes; the control group was made …

The Effects Of Fly Ash And Flue-Gas Desulfurization Wastes On Groundwater Quality In A Reclaimed Lignite Strip Mine Disposal Site, Frank W. Beaver

Theses and Dissertations

Coal conversion wastes were generated at a lignite-coal-fired, steam-electric power station near Center, North Dakota, and were buried in unsaturated and saturated settings within the nearby stripmine, typical of settings used by the industry. The study ran for 8 years beginning in 1978. Approximately 240 piezometers were used for collecting groundwater level and groundwater chemistry data in the saturated zone. Pressure-vacuum lysimeters were installed to sample the unsaturated zone. Interstitial water was extracted from Shelby tube and auger samples at otherwise uninstrumented points.

More than 15,000 water-level recordings allowed precise definition of groundwater flow and occurrence at the study site. …

Shoreline Recession: Past, Present, And Future, Lake Sakakawea, North Dakota, Brian S. Sandberg

Theses and Dissertations

Shoreline erosion is a major problem at Lake Sakakawea, North Dakota. Instrumentation along the eastern shore was initiated in 1983 to measure shoreline recession and determine the processes responsible, with the ultimate goal being the development of a relatively simple equation to predict the rate of recession which is better than the model currently used by the U.S. Army Corps of Engineers.

For the twenty stations, the present rate of recession ranges from 0.2 to 4.3 m/y. Approximately 78 percent of the yearly recession occurs during the warm months (May-October) due to wave erosion. Erosion over the cold months occurs …