271 Matching Results

Search Results

Results: 1 - 24 next
open access

A Comprehensive Model for the Rotational Spectra of Propyne CH₃CCH in the Ground and V₁₀=1,2,3,4,5 Vibrational States

Description: The energy states of C₃ᵥ symmetric top polyatomic molecules were studied. Both classical and quantum mechanical methods have been used to introduce the energy states of polyatomic molecules. Also, it is shown that the vibration-rotation spectra of polyatomic molecules in the ground and excited vibrational states can be predicted by group theory. A comprehensive model for predicting rotational frequency components in various v₁₀ vibrational levels of propyne was developed by using perturbation t… more
Date: December 1986
Creator: Rhee, Won Myung
Partner: UNT Libraries
open access

Silenes and Silenoids in the Chemistry of Cyclopentadienylsilanes

Description: Evidence is presented that apparent silene products obtained from the metalation of cyclopentadienyldimethyl - chlorosilane either with tert-butyl1ithium or with methylenetriphenylphosphorane actually arise from the metalated starting material, a silenoid, rather than from a silafulvene intermediate. Trimethylmethoxysi1ane is shown to be an effective trap for dimethylsilafulvene. A new dimethylsilafulvene precursor, bis(dimethylmethoxysi1yl) cyclopentadiene, which gives high yields of dimethyld… more
Date: August 1986
Creator: Rozell, James M. (James Morris)
Partner: UNT Libraries
open access

Roles of Calcium Ions and Cyclic AMP in Olfactory Transduction

Description: The roles of Ca2 + and cAMP in olfactory transduction were explored using agents which affect calcium channels and second messenger systems. These agents were applied at certain calculated final concentrations onto olfactory epithelia of urethane-anesthetized frogs (Sana PiPlens) by two-sec aerosol spray. During extracellular recording, saturated vapors of isoamyl acetate were delivered every 100 sec in 0.3 sec pulses to produce an electroolfactogram (EOG). Inorganic cations that block inward … more
Date: December 1986
Creator: Winegar, Bruce D. (Bruce David)
Partner: UNT Libraries
open access

The Genetics of Pigmentation in Corynebacterium poinsettiae ATCC 9682

Description: Corynebacterium poinsettiae mutant strains blocked in carotenoid biosynthesis were obtained by treatment with the mutagen N-methyl-N1-nitro-N-nitrosoguanidine. Additional carotenoid (Crt) mutant strains were obtained from a previous study conducted in our laboratory. Fifty-nine Crt mutants affected in carotenoid biosynthesis were examined by a normal phase high performance liquid chromatography (HPLC) system. Pigment extracts of Crt mutants and C. poinsettiae wild type strains were resolved by … more
Date: August 1986
Creator: Campbell, Alan L. (Alan Lee)
Partner: UNT Libraries
open access

A Systematic Analysis and Critical Comparison of the Educational Provision for Students in Nigeria with the Available Educational Opportunity for Handicapped Students

Description: The problem of the study was the inadequate education of handicapped students in Nigeria. The primary purpose of the study was to develop a construct based on the United States models and research on special education, and to compare educational provisions for Nigerian students with the available educational opportunity for handicapped students. In order to achieve the stated objectives of the study, two methodological approaches were utilized: (1) Likert scale for opinion questionnaires, and (… more
Date: August 1986
Creator: Ogunrinu, Thomas B. (Thomas Bode)
Partner: UNT Libraries
open access

Automorphism Groups of Strong Bruhat Orders of Coxeter Groups

Description: In this dissertation, we describe the automorphism groups for the strong Bruhat orders A_n-1, B_n, and D_n. In particular, the automorphism group of A_n-1 for n ≥ 3 is isomorphic to the dihedral group of order eight, D_4; the automorphism group of B_n for n ≥ 3 is isomorphic to C_2 x C_2 where C_2 is the cyclic group of order two; the automorphism group of D_n for n > 5 and n even is isomorphic to C_2 x C_2 x C_2; and the automorphism group of D_n for n ≥ 5 and n odd is isomorphic to the dihedr… more
Date: August 1986
Creator: Sutherland, David C. (David Craig)
Partner: UNT Libraries
open access

An Assessment of the Effect of the Investment Tax Credit on Capital Investment in Farm Supply Cooperatives in Michigan, Minnesota, North Dakota and Wisconsin

Description: The purpose of this study is to shed more light on whether the investment tax credit is effective in stimulating capital investment. The sample includes 104 local cooperatives. The majority of the data was collected from the files of the St. Paul, Minnesota, Bank for Cooperatives. The study has a single purpose of determining whether the changes to the Internal Revenue Code in the Revenue Tax Act of 1978 had an effect on the capital expenditure levels of farm supply cooperatives. In 1978 the in… more
Date: May 1986
Creator: Milacek, Emil C., Jr.
Partner: UNT Libraries
open access

Six Pieces for Orchestra

Description: The six Pieces for Orchestra are short twelve-tone compositions . Each piece is an individual entity in itself, but they all stem from the same twelve-tone row. The method of composition with twelve tones evolved through the works of Arnold Schoenberg (1874-1951). It was utilized by his disciples and has won general acceptance by a wide variety of composers.
Date: August 1986
Creator: Greene, Michael, 1939-
Partner: UNT Libraries
open access

New Descriptions, Intraspecific Variation and Systematic Importance of Drumming Behavior in Selected North American Plecoptera

Description: Drumming behavior is described for the first time in 33 North American Plecoptera species, and signals of an additional five species, Pteronarcys pictetii, Acroneuria abnormis, Paragnetina media, Clioperla clio and Isogenoides zionensis, are further detailed. An out-group comparison of behavioral characters in all 104 world species whose drumming is known showed that the behavior is more advanced in the Arctoperlaria Group Systellognatha than in the Group Euholognatha. In general, tapping, mono… more
Date: December 1986
Creator: Maketon, Monchan
Partner: UNT Libraries
open access

Fitness-Related Alterations in Blood Pressure Control: The Role of the Autonomic Nervous System

Description: Baroreflex function and cardiovascular responses to lower body negative pressure during selective autonomic blockade were evaluated in endurance exercise trained (ET) and untrained (UT) men. Baroreflex function was evaluated using a progressive intravenous infusion of phenylephrine HCL (PE) to a maximum of 0.12 mg/min. Heart rate, arterial blood pressure, cardiac output and forearm blood flow were measured at each infusion rate of PE. The reduction in forearm blood flow and concomitant rise in … more
Date: December 1986
Creator: Smith, Michael Lamar, 1957-
Partner: UNT Libraries
open access

A Study of the Perception of Faculty Concerning Integration of Faith and Learning at Free Methodist Colleges

Description: The problem with which this study is concerned is the perception of faculty members at Free Methodist colleges regarding the integration of faith and learning in the total environment of their institution. In order to study this problem, the entire population of faculty was studied at Greenville College, Greenville, IL.; Roberts Wesleyan College, Rochester, N.Y.; Seattle Pacific University, Seattle, WA.; and Spring Arbor College, Spring Arbor, MI. The purposes of this study are fourfold: (1) to… more
Date: May 1986
Creator: Mannoia, Kevin W.
Partner: UNT Libraries
open access

Communication Quality in Information Systems Development: The Effect of Computer-Mediated Communication on Task-Oriented Problem Solving

Description: The problem motivating this research is that ineffective communication may hamper systems development efforts. Specifically germane to this study are development efforts characterized as task-oriented, and which require information-sharing and problem-solving activities. This research problem motivated an analysis of the communication process and lead to the development of a temporal framework that delineates variables associated with task-oriented, end user/systems analyst communication inter… more
Date: May 1986
Creator: Smith, Jill Yvonne
Partner: UNT Libraries
open access

Socioeconomic Backgrounds of Educators and Their Attitudes Toward Women as Academic Administrators

Description: The purpose of this study is to determine the relationship, if any, between the socioeconomic backgrounds of educators and their attitudes toward women as academic administrators, including a comparison of the attitudes of male and female educators toward women as administrators. The population consisted of all full time faculty and administrators in 25 colleges and universities holding membership in the Association for Higher Education (AHE) of North Texas during the 1984/1S85 academic year. T… more
Date: May 1986
Creator: Okoro, Gregory I. (Gregory Ifeanyi)
Partner: UNT Libraries
open access

Chromatographic and Spectroscopic Studies on Aquatic Fulvic Acid

Description: High Performance Liquid Chromatography (HPLC) was used to investigate the utility of this technique for the analytical and preparative separation of components of aquatic fulvic acids (FA). Three modes of HPLC namely adsorption, anion exchange and reversed phase were evaluated. Aquatic fulvic acids were either extracted from surface water and sediment samples collected from the Southwest of the U.S., or were provided in a high purity form from the USGS. On the adsorption mode, a major fraction… more
Date: August 1986
Creator: Chang, David Juan-Yuan
Partner: UNT Libraries
open access

A Study of the Cultural Interaction Between Thai Students and North Texas State University

Description: Because international students are an increasingly significant aspect in American colleges and universities and on the North Texas State University campus in particular, this study was undertaken to explore the intercultural clash which Thai students at North Texas State University experience. Twenty-two Thai students were interviewed in depth using the oral history method. Ten faculty and administrators who work with international students were interviewed concerning their observations of Thai… more
Date: December 1986
Creator: Bohlcke, Diane
Partner: UNT Libraries
open access

An Analysis of the Current Texas School Finance System to Determine to What Extent it Meets Criteria for Equity Concerning School Finances

Description: The main purpose of this study was to determine the effect of Texas House Bill 72 on equalization of finances in the public school districts of Texas. House Bill 72 is a finance reform bill which was passed by the Texas Legislature during the Summer of 1984. This study involves basically three steps. First, current criteria for equity as defined by school finance "experts" and recent definitive court decisions were determined. Second, financial data from the Texas Education Agency were statisti… more
Date: December 1986
Creator: Arrington, Ronald L. (Ronald Lee)
Partner: UNT Libraries
open access

Texas Public School District Legal Costs and Preventive Law Practices

Description: The purpose of this study was to compare the legal costs of Texas public school districts during the school years 1980-81, 1981-82, and 1982-83 with the preventive law practices utilized by those districts. A survey was made of Texas superintendents' knowledge of school law. The data were contrasted with legal costs and the preventive law practices of the district. Two survey instruments were developed, and the case study approach was utilized. A survey was sent to the 1,101 Texas public schoo… more
Date: December 1986
Creator: Zollars, Mary Catherine
Partner: UNT Libraries
open access

Parents as Therapeutic Agents: A Study of the Effect of Filial Therapy

Description: The problem with which this investigation was concerned was that of the use of parents as therapeutic agents. The purpose of this study was twofold. The first was to determine the effect of filial therapy on parental acceptance, self-esteem, parent-child relationship, and family environment. A second was to analyze the results and make recommendations concerning the effectiveness of filial therapy as a treatment modality for parents and their children. The experimental design of the study wa… more
Date: May 1986
Creator: Glass, Nancy, 1949
Partner: UNT Libraries
open access

The Eosinophil and Lysophospholipase Responses in Mice Infected with Trichinella spiralis: A Role for the Lymphocyte and Macrophage

Description: The relationship among eosinophils, lysophospholipase activity and the immune response in animals infected with Trichinella spiralis was studied using in vivo and in vitro techniques. In an in vivo experiment, anti-thymocyte serum (ATS) was administered to mice infected with T. spiralis and its effects on intestinal lysophospholipase (EC 3.1.1.5.) activity, peripheral blood, bone marrow and intestinal eosinophilia were measured in the same experimental animal. The ATS caused a significant tempo… more
Date: August 1986
Creator: Adewusi, Iyabode Olukemi, 1958-
Partner: UNT Libraries
open access

Consistency in Lattices

Description: Let L be a lattice. For x ∈ L, we say x is a consistent join-irreducible if x V y is a join-irreducible of the lattice [y,1] for all y in L. We say L is consistent if every join-irreducible of L is consistent. In this dissertation, we study the notion of consistent elements in semimodular lattices.
Date: May 1986
Creator: Race, David M. (David Michael)
Partner: UNT Libraries
open access

My Lazy Mind Needs a Dumb Structure to Lean On

Description: The purpose of this study was to examine the difference between language and the use of visual imagery to represent experiences and ideas. It focused on the following questions: 1. Can the meaning of a painting be ascertained by analyzing the referents of the images and their relationships to one another? 2. How does the purely formal part of the painting function in the creation of meaning? 3. What is the difference in the meaning created by language and visual imagery when they were used to r… more
Date: May 1986
Creator: Henderson, Micheal H.
Partner: UNT Libraries
open access

The Role of Implied Texture in Figural Imagery

Description: This study explored how implied texture was used to give meaning to figural imagery. Several questions were answered in proceeding with the creative project: 1. Did implied texture abstract the figurative image? If so, how was content affected? 2. Did implied texture act as an obstruction to content? 3. Did implied texture act as an integral part of content? 4. Did implied texture exist as a separate entity from content?
Date: August 1986
Creator: Bowman, Taylor Rask
Partner: UNT Libraries
open access

Concerto for Guitar and Chamber Orchestra

Description: The Concert for Guitar and Chamber Orchestra, a three-movement work, is approximately seventeen and one-half minutes in duration. Adhering to the three movement concerto form, the work reflects the influence of several styles of twentieth-century orchestral music. In the first movement, two principal motives, significant throughout the work, are developed in a series of metered and non-metered events. The second movement consists of a set of guitar cadenzas framed by increasingly complex materi… more
Date: May 1986
Creator: Scott, Stephen, 1944-
Partner: UNT Libraries
Back to Top of Screen