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Ultrasensitive technique for measurement of two-photon absorption

Description: In this study the technique of pulse delay modulation is described, which can monitor nonlinear changes in transmission with shot noise limited signal-to-noise ratios even in the presence of large background signals.
Date: December 1991
Creator: Miller, Steven A. (Steven Alan)
Partner: UNT Libraries

The art process in therapy:a phenomenological study

Description: This study utilized a phenomenological research methodology based on Husserl's work to explore the content of subjective internal experiencing during the art process. The study was designed to examine what transpired during the art experience in therapy to provide a better understanding of the therapeutic dimensions of the subject's interaction with the art medium, in this case, drawing with pastels.
Date: August 1991
Creator: Bliss, Shirley E.
Partner: UNT Libraries

In the midst of spoils: a composition for mixed chorus (SATB) and small instrumental ensemble

Description: In the Midst of Spoils is a setting, for SATB choir and small instrumental ensemble, of the poem "Blight," by Ralph Waldo Emerson. Emerson's poem contrasts modern man's exploitative attitude toward nature with the more reverent attitude assumed by ancient or primitive cultures. This setting is in a single movement, approximately twenty minutes in duration, consisting of fifteen distinct sections.
Date: August 1991
Creator: Norris, Thomas B.
Partner: UNT Libraries

Heresy vs. Orthodoxy: The Preus/Tietjen Controversy

Description: Using the framework set up by rhetorical critic Thomas M. Lessl in his article "Heresy, Orthodoxy, And The Politics Of Science", this study examines the ways in which heretical discourse defines community boundaries and shapes perceptions of right belief. Specifically, this study analyzes the historic conflict in the Lutheran Church-Missouri Synod which produced the doctrinal statement "A Statement of Scriptural and Confessional Principles". Comparison is made between this event and other "heretical" conflicts in other discourse communities. This study concludes that community boundaries must be drawn, and that a doctrinal or policy statement is a useful rhetorical tool to accomplish such a task. Rhetorical critics may assist in this by examining heretical conflicts as historical trends, rather than emotional dissonance.
Date: August 1991
Creator: Barnhart, Melody R. (Melody Ruth)
Partner: UNT Libraries

Dante, Machiavelli, and Luther: The Evolution of the Modern State

Description: The evolution of the State was a process which went through many stages. Analysis of the modern State tends to begin with the Enlightenment; however, Dante Alighieri, Niccolo Machiavelli, and Martin Luther each represented early phases of this evolution. The theories of these men were closely tied to their evaluation of man's nature. Their main objectives were separation of the State from the Church and the definition of the rulers obligations to his subjects. Although humanism influenced all of them to varying degrees, each developed unique views of the State. Elements of these views can be detected in more modern theorists.
Date: May 1991
Creator: Peterson, Rebecca C. (Rebecca Carol)
Partner: UNT Libraries

Synthesis and 2-D NMR Analysis of a New Phenyl-Substituted Polycyclic Compound

Description: Diels-Alder [4+2] cycloaddition of a mixture of 1- and 2 methylcyclopentadiene to 2-phenyl-g.-benzoquinone affords a mixture of four nd cycloadducts. A single, isomerically pure cycloadduct was isolated by careful column chromatography. Stereospecific reduction of this material with sodium borohydride and cerium(III) chloride 'affords a single, isomerically pure tricyclic diol. The structures of the cycloadduct and this tricyclic diol, established via analysis of their one- and two-dimensionial NMR spectra, were shown to be (1-methyl-5-phenyltricyclo[6.2.1.02,7]undec a-4,9 diene-3,6-dione and 1-methyl-5-phenyltricyclo[6.2.1.0 2 ,7 ]undeca-4,9-diene t.&A-3-=.a-6-diol), respectively. Intramolecular [2+2] photocyclization of this tricyclic diol afforded the corresponding cage diol, 3-methyl-7phenylpentacyclo[5.4.0.0 2 ,6 .03 , 1 0 .05, 9 ]undecane-.exogxa-8,11-diol. Oxidation of this cage diol with pyridinium chlorochromate in dry dichloromethane afforded a single, isomerically pure cage hydroxyketone, 3-methyl-7 phenylpentacyclo[5.4.02,6.03,l .1519]undecane-xA-8-ol-II-one, whose structure was established by single crystal X-ray crystallographic methods.
Date: May 1991
Creator: Tsay, Fuh-Rong
Partner: UNT Libraries

Studies on ADP-Ribose Polymer Metabolism in Cultured Mammalian Cells Following DNA Damage

Description: ADP-ribose polymer metabolism has been studied in human cells derived from a patient with Glutamyl Ribose Phosphate Storage Disease (GRPSD) and in mouse C3H1OT1/2 cells following oxidative stress induced by hydrogen peroxide (H202 ). It has been postulated that GRPSD resulted from an abnormality in ADP-ribose polymer metabolism. This study has shown that these cells exhibit reduced poly(ADP ribose) polymerase activity which is proposed to result from modification of the enzyme with ribose phosphate groups. The modification in the polymerase is proposed to be secondary to a defect in either ADP-ribosyl proteinlyase or an overproduction of a cellular phosphodiesterase. The metabolism of ADP-ribose polymers was rapidly altered by H202 and there were independent effects on adenine nucleotide pools. The results suggest that ADP-ribose polymer metabolism is involved in cellular defenses to oxidative stress.
Date: May 1991
Creator: Maharaj, Geeta
Partner: UNT Libraries

RADIX 95n: Binary-to-Text Data Conversion

Description: This paper presents Radix 95n, a binary to text data conversion algorithm. Radix 95n (base 95) is a variable length encoding scheme that offers slightly better efficiency than is available with conventional fixed length encoding procedures. Radix 95n advances previous techniques by allowing a greater pool of 7-bit combinations to be made available for 8-bit data translation. Since 8-bit data (i.e. binary files) can prove to be difficult to transfer over 7-bit networks, the Radix 95n conversion technique provides a way to convert data such as compiled programs or graphic images to printable ASCII characters and allows for their transfer over 7-bit networks.
Date: August 1991
Creator: Jones, Greg, 1963-2017.
Partner: UNT Libraries

Toxicity of Polychlorinated Biphenyls (Aroclor 1254) on the Earthworm Eisenia foetida

Description: Objectives were to: (1) assess toxicity of polychlorinated biphenyls on Eisenia foetida, in terms of survival (LC5O/LD5O), and suppression of coelomocytes to form secretory (SR) and erythrocyte rosettes (ER) with, and to phagocytize rabbit erythrocytes; and (2) compare results with those of Lumbricus terrestris to assess relative sensitivities to PCB. Using 5-d filter paper contact exposure protocol, LC50 and LD50 were 30.4 cg/cm2 and 4450 cg/g dry mass, respectively. Nominal PCB exposure concentrations of 5.0 and 10.0 pg/cm2 resulted in tissue levels of 1389 and 2895 pg/g dry mass causing a significant reduction in SR formation by 18 and 52%, respectively. ER formation and phagocytosis were reduced significantly (52 and 61%) only at the higher tissue concentration. Compared to reported data on lethality and immunomodulation in L. terrestris, E. foetida appears to be more resistant.
Date: August 1991
Creator: Sassani, Ramin
Partner: UNT Libraries

Nineteenth Century Light and Color Theory: Rainbow Science in the Art of Frederic Edwin Church

Description: The purpose of this study was to investigate the depiction of rainbows in the art of Frederic Church in relation to mid-nineteenth century scientific developments in order to determine Church's reliance on contemporary concerns with light and color. An examination of four Church paintings with rainbows, three oil sketches, and nearly a dozen pencil drawings shows that Church's rainbow art represents a response to mid-century cultural values connecting science and art. Changes within Church's rainbow depictions occurred as the artist explored the visual representations of light, synthesizing the scientific knowledge of light and color available to him, and reconciling that information with the requirements of art.
Date: May 1991
Creator: Upchurch, Diane M. (Diane Marie)
Partner: UNT Libraries

Characterization of Pyrimidine Biosynthesis in Pseudomonas putida Using Mutant and Wild Type Strains

Description: The biosynthesis of pyrimidines in Pseudomonas putida was investigated. In this study, pyrimidine requiring mutants were isolated by conventional mutagenesis and enrichment. The strains required exogenously supplied pyrimidines for growth and were found by enzyme assays to be deficient for the product of the pyrB gene encoding the enzyme aspartate transcarbamoylase. None of the intermediates of the pathway could supply the auxotrophic requirement of the strain; only preformed pyrimidines, metabolized via salvage pathways could suffice. Pyrimidine limitation in the mutant caused a slight but significant fifty per cent increase in expression of all the de novo biosynthetic enzymes. Pyrimidine starvation's effect on nucleotide pool levels was examined in the mutant and caused a marked swelling of the purine nucleotide pools.
Date: August 1991
Creator: Chang, Mingren
Partner: UNT Libraries

Mitochondrial DNA Restriction Site Analysis of the Phylogeny of the Truei and Boylii Species Groups of the Rodent Genus Peromyscus (Cricetidae)

Description: The phylogenetics of eight species of the Peromyscus truei and P. boylii species groups from 15 populations were analyzed based on mitochondrial DNA sequence differentiation, using 13 hexanucleotide specific restriction enzymes. P. difficilis, P. nasutus, and P. attwateri were found to be members of the same clade. P. leucopus was not found to be closely related to any of the species of the boylii or truei species groups. Phylogenetic interpretations for the remaining species differed based on Wagner and Dollo parsimony analyses. P. true appears to be most closely related to P. gratus based on Wagner parsimony and the phenetic analysis, while the relationship of P. gratus to other species could not be resolved based on Dollo parsimony.
Date: August 1991
Creator: DeWalt, Theresa Spradling
Partner: UNT Libraries

Dichotomy in American Western Mythology

Description: The fundamental dichotomy between savage and civilized man is examined within the archetypal Western myth of American culture. The roots of the dichotomy are explored through images produced between 1888 and 1909 by artists Frederic Remington and Charles Russell. Four John Ford films are then used as a basis for the "dichotomous archetype" approach to understanding Western myth in film. Next, twenty-nine "historical" and "contemporary" Western movies are discussed chronologically, from The Virginian (1929) to Dances with Wolves (1990), in terms of the savage/civilized schema as it is personified by the roles of archetypal characters. The conclusion proposes a potential resolution of the savage/civilized conflict through an ecumenical mythology that recognizes a universal reverence for nature.
Date: May 1991
Creator: Robinson, Scott E. (Scott Elmon), 1961-
Partner: UNT Libraries

Duals and Reflexivity of Certain Banach Spaces

Description: The purpose of this paper is to explore certain properties of Banach spaces. The first chapter begins with basic definitions, includes examples of Banach spaces, and concludes with some properties of continuous linear functionals. In the second chapter, dimension is discussed; then one version of the Hahn-Banach Theorem is presented. The third chapter focuses on dual spaces and includes an example using co, RI, and e'. The role of locally convex spaces is also explored in this chapter. In the fourth chapter, several more theorems concerning dual spaces and related topologies are presented. The final chapter focuses on reflexive spaces. In the main theorem, the relation between compactness and reflexivity is examined. The paper concludes with an example of a non-reflexive space.
Date: August 1991
Creator: Dahler, Cheryl L. (Cheryl Lewis)
Partner: UNT Libraries

Male Sexual Aggression and Humor Response

Description: The purpose of this study was to gain a better understanding of sexually aggressive behavior through the examination of humor appreciation among male undergraduates. As compared to nonaggressive males, sexually aggressive males showed a significantly greater appreciation for humor which negatively stereotyped females, portrayed prejudicial views of rape-and rape victims, and contained content related to male sex drive and virility. Differences in humor appreciation were also found for males with high sex drive. Additional findings included correlations between aggressive drive and sexually aggressive status, as well as between sex drive and likelihood to rape.
Date: May 1991
Creator: Phelan-McAuliffe, Debra
Partner: UNT Libraries

Comparison of Selected Pure-Tone and Speech Tests in Predicting Hearing Handicap

Description: This study assessed the effective use of pure-tone testing versus speech testing as used to predict the degree of hearing handicap experienced by an individual. Twenty-one subjects over the age of 65 were tested. Each subject was administered the following test battery: spondee threshold; a pure-tone evaluation, including air and bone conduction; Speech Perception in Noise (SPIN) test; Synthetic Sentence Identification (SSI) test; NU-6 for speech discrimination; establishment of most comfortable listening level (MCL) and loudness discomfort listening level (LDL); immittance testing including tympanograms, acoustic reflex thresholds, and reflex decay.
Date: August 1991
Creator: Dye, Amy
Partner: UNT Libraries

Practices of English Diction for Singers 1900-1971

Description: Specialized training in English diction for singers became increasingly prevalent in the twentieth century. Along with this growth, a small but significant literature on the subject developed. There are divergent practices recommended for American singers, displayed by nine authors in ten books published between 1900 and 1971. A comparative study yields pedagogies of vowel and consonant production. Issues of sounds in context, including proper linkage and stress, adjustments from speech to song, and practices dictated by musical style, are paramount. The literature demonstrates an increased use of International Phonetic Alphabet symbols as a pedagogical tool. The areas of kinesiology and acoustical research are suggested for further study.
Date: August 1991
Creator: Barber, Carol H. (Carol Hansell)
Partner: UNT Libraries

The Effects of Long Term Moderate Ethanol Intake on the Immune Response in Rats

Description: Using a rat model, the effects of a single dose or six to twelve months of daily oral administration of ethanol on the immune system were determined. The rats were challenged with sheep red blood cells after the various dosing periods to elicit an immune response. Immune system responsiveness was determined by means of white blood cell counts and differentials, antibody titers, and T-cell numbers. No deleterious effects of the ethanol on the immune response were seen, while the female alcohol-fed rats showed a significant increase in T-Cell numbers, white blood cell counts, and lymphocytes over the sham group.
Date: August 1991
Creator: Follin, Cynthia A. (Cynthia Ann)
Partner: UNT Libraries

The Utilization of Semantic Webbing as a Method of Teaching Art Criticism in the Elementary School

Description: Art educators and classroom teachers in the elementary schools are confronted with the challenge of helping children look critically at works of art and develop written and/or verbal skills to communicate their findings. It was the purpose of this study to determine the effectiveness of the conceptual learning technique of semantic webbing in teaching art criticism in the elementary classroom. The author revealed a significant difference of opinions between two sample groups and similarities between the variables of frequency of use, and familiarity of the webbing technique and its effectiveness in the classroom. The sample groups consist of elementary classroom teachers and art specialists who work with kindergarten and first grade children.
Date: May 1991
Creator: Peel, Marie A. (Marie Annette)
Partner: UNT Libraries

The Effects of Discipline-Based Art Education upon Reading Test Scores of Suburban North Texas Second Grade Children

Description: This study examines the effects that discipline-based art education has upon reading test scores of public school second grade children. The progress in language arts of an experimental group and a control group were followed for two six week grading cycles. The experimental group was treated with DBAE instruction for one six weeks, while the control group received only studio production exercises. Both groups received no art instruction for another six weeks. Gains between mean pre-test and post-test scores indicated a significant difference for the experimental group but not the control group.
Date: May 1991
Creator: Stephens, Pamela Geiger
Partner: UNT Libraries

A Study of the Relationship Between the Use of Color for Text in Computer Screen Design and the Age of the Computer User

Description: This study addresses an individual's performance, relating it to eyesight changes due to the aging of the individual and to color computer screens used for computer-based-instruction not designed specifically for older students. This study determines how existing research in gerontology, human-computer interface, and color use in visual graphics can be applied to the design of computer screen displays containing color text and backgrounds and how various color combinations will affect performance by adult learners forty years of age and older. The results of this research provide software developers and instructional designers guidelines to use when designing computer screen displays for use in instructional computing settings involving older adults.
Date: December 1991
Creator: D'Angelo, John J.
Partner: UNT Libraries

Sue Bridehead As a Model for Modern Feminism

Description: Thesis written by a student in the UNT Honors College discussing the growth of feminist characters in literature, especially Sue Bridehead from Thomas Hardy's novel, Jude the Obscure.
Date: Spring 1991
Creator: Milam, Pamela
Partner: UNT Honors College