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Regulation of Colony-Stimulating Factor-1 Biosynthesis

Description: Recent studies suggest that synthesis of the Colony-stimulating factor (CSF) is a well regulated process. However, the molecular mechanisms of the signal transduction of the various inducers of CSF such as monokines and lymphokines are not well understood. Using Interleukin 1 (IL-1) stimulation of CSF-1 in the MIA PaCa-2 cell line as a model system, the involvement of G-protein has been studied. The IL-1 induction of CSF-1 synthesis can be inhibited by both Pertussis toxin and Cholera toxin, wh… more
Date: May 1990
Creator: Ku, Chun-Ying
Partner: UNT Libraries
open access

The Influence of the First Amendment on Academic Freedom

Description: Academic freedom has gone through three distinct eras yet each era overlaps a great deal with the one following it. The first era was the bureaucratic. It was exemplified by the negotiations between administrators and professors in the 1920s. The American Association of University Professors and the American Association of Colleges began cooperating and a hierarchical structure emerged, with the tenured professor at the top of the faculty. The second era was the political era and it was mainly … more
Date: May 1990
Creator: Ferdon, Douglas Robert, 1945-
Partner: UNT Libraries
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Stylistic and Technical Considerations for Pedaling the Debussy Preludes, Together with Three Recitals of Selected Works of L. van Beethoven, A. Berg, J. Brahms, F. Chopin, C. Debussy, W.A. Mozart, S. Prokofieff, A. Schoenberg, F. Schubert, and R. Schumann

Description: The lecture recital was given November 6, 1989. Five Preludes by Claude Debussy were preformed following a lecture on some important considerations of approaching the pedaling complexities in his solo piano works. In addition to the lecture recital, three other solo piano recitals were performed. The first solo recital consisted of works by Franz Schubert and Robert Schumann, and was performed on November 17, 1980. On March 1, 1982, the second solo recital was presented. This performance consis… more
Date: May 1990
Creator: Etheridge, Kay, 1954 Apr. 18-
Partner: UNT Libraries
open access

Observation by flow sup 1 H NMR and dimerization kinetics and products of reactive ortho-quinodimethanes and benzocyclobutadiene

Description: The reactive o-quinodimethanes, 1,2-dimethylene-1,2-dihydronaphthalene (9) and o-xylylene (1) were observed by flow {sup 1}H NMR spectroscopy at room temperature. The {sup 1}H NMR spectrum of 9 was obtained in the absence of precursor and dimers. However, the {sup 1}H NMR spectrum of the more reactive 1, generated in a similar manner from (o-((trimethylsilyl)methyl)benzyl)trimethylammonium iodide (5.) could be obtained only in the presence of its stable (4 + 2) and (4 + 4) dimers. The dimerizat… more
Date: September 21, 1990
Creator: Fischer, David
Partner: UNT Libraries Government Documents Department
open access

Problems and Possibilities in the Translation of the Classics

Description: Thesis written by a student in the UNT Honors College discussing the author's translations of two selections by Aristotle. The translation appears on even pages and the author's translation notes follow on odd pages.
Date: Autumn 1990
Creator: Davis, Mike Lee
Partner: UNT Honors College
open access

A three-dimensional transient neutronics routine for the TRAC-PF1 reactor thermal hydraulic computer code

Description: No present light water reactor accident analysis code employs both high state of the art neutronics and thermal-hydraulics computational algorithms. Adding a modern three-dimensional neutron kinetics model to the present TRAC-PFI/MOD2 code would create a fully up to date pressurized water reactor accident evaluation code. After reviewing several options, it was decided that the Nodal Expansion Method would best provide the basis for this multidimensional transient neutronic analysis capability.… more
Date: May 1, 1990
Creator: Bandini, B.R.
Partner: UNT Libraries Government Documents Department
open access

Determination of the Complete Nucleotide Sequence of the xylZ Region of the Pseudomonas Putida TOL Plasmid pDK1, Encoding a Subunit of the Toluate Oxidase Complex

Description: A 1.57 kb XhoI restriction fragment derived from the TOL plasmid pDKI was subcloned into the E. Coli plasmid pUC19. The complete nucleotide sequence of this XhoI fragment was determined using both the chemical cleavage and chain termination DNA sequencing methods.
Date: May 1990
Creator: Khedairy, Hamid S. (Hamid Sabri)
Partner: UNT Libraries
open access

A Kinetic Study of the Recombination Reacton Na + SO₂ + Ar

Description: The recombination reaction Na + S02 + Ar was investigated at 787 16 K and at pressures from 1.7 to 80 kPa. NaI vapor was photolyzed by an excimer laser at 308 nm to create Na atoms, whose concentration was monitored by time-resolved resonance absorption at 589 nm. The rate constant at the low pressure limit is ko = (2.7 0.2) x 10-21 cm6 molecule-2 s~1. The Na-SO 2 dissociation energy E0 = 170 35 kJ mol1 was calculated with RRKM theory. The equilibrium constant gave a lower limit E0 > 172 kJ mol… more
Date: December 1990
Creator: Shi, Youchun
Partner: UNT Libraries
open access

Exercise Capacity Following Four Hours of Head-Down Rest in Endurance-Exercise-Trained and Untrained Subjects

Description: Peak oxygen uptake (VO2PEAK) in endurance exercise trained (ET =8) subjects (VO2PEAK = 61.7 1.6 ml 02.kg.min-1) was compared to the V02 PEAK of untrained (UT = 8) subjects (V02 PEAK = 38.4 1.7 ml 02 -kg.min1) after four hours of -6* head-down rest (HDR).Although both groups showed a reduction in blood volume (BV) following HDR, this decrement was greater for ET subjects (delta BV = -3.23 0.46 mi/kg; P <0.05). The ET subjects had a greater decrease in VO2=(delta 02E -5.58 1.05 ml 02-kg.min-1; P … more
Date: December 1990
Creator: Williamson, Jon W.
Partner: UNT Libraries
open access

Optical properties and electronic structures of d- and f-electron metals and alloys, Ag-In, Ni-Cu, AuGa sub 2 , PtGa sub 2 ,. beta. prime -NiAl,. beta. prime -CoAl, CeSn sub 3 , and LaSn sub 3

Description: Optical properties and electronic structures of disordered Ag{sub 1- x}In{sub x}(x = 0.0, 0.04, 0.08, 0.12) and Ni{sub 1-x}Cu{sub x} (x = 0.0, 0.1, 0.3, 0.4) alloys and ordered AuGa{sub 2}, PtGa{sub 2}, {beta}{prime}-NiAl, {beta}{prime}-CoAl, CeSn{sub 3}, and LaSn{sub 3} have been studied. The complex dielectric functions have been determined for Ag{sub 1-x}In{sub x}, Ni{sub 1-x}Cu{sub x}, AuGa{sub 2}, and PtGa{sub 2} in the 1.2--5.5 eV region and for CeSn{sub 3} and LaSn{sub 3} in the 1.5--4.5… more
Date: October 17, 1990
Creator: Kim, Kwang Joo
Partner: UNT Libraries Government Documents Department
open access

Syntheses and Structures of Substituted Polycyclic Molecules and Analysis of the Two-Dimensional NMR Spectrum of Thiele's Ester

Description: Diels-Alder cycloaddition of methylcyclopentadienes to 2,5-dibromo-p-benzoquinone was performed. A single, isomerically pure cycloadduct was isolated, whose structure was assigned via analysis of its 1-D and 2-D NMR spectra. Diels-Alder cycloaddition of methylcyclopentadienes to 2 -methoxy-p-benzoquinone was performed. A single, isomerically pure cycloadduct was isolated, whose structure was assigned via analysis of the 1-D and 2-D NMR spectra of this cycloadduct and its reduction product obtai… more
Date: May 1990
Creator: Lu, Shao-Po
Partner: UNT Libraries
open access

Photochemical Silaylide, Silylene and Silene Syntheses

Description: The synthesis of o-(N,N-dimethylamino)methylphenyl tris (trimethylsilyl) silane (II), a photochemical precursor of o- (N,N-dimethylamino) methylphenyl (trimethylsilyl) sila ammonium ylide (intramolecular silylene complex) and otolyl(trimethylsilyl)silylene is reported. Photolysis of II at room temperature in a cyclohexane solution of triethyl silane produced the silylene ylide and the presumably uncomplexed isomer, a silylene, which is trapped to afford the 2-(o-(N,N-dimethylamino)methylphenyl)… more
Date: August 1990
Creator: Tan, Changqing
Partner: UNT Libraries
open access

Anomalous Behavior in the Rotational Spectra of the v₈=2 and the v₈=3 Vibrations for the ¹³C and ¹⁵N Tagged Isotopes of the CH₃CN Molecule in the Frequency Range 17-95 GHz

Description: The rotational microwave spectra of the three isotopes (^13CH_3^12C^15N, ^12CH_3^13C^15N, and ^13CH_3^13C^15N) of the methyl cyanide molecule in the v_8=3, v_8=2, v_7=1 and v_4=1 vibrational energy levels for the rotational components 1£J£5 (for a range of frequency 17-95 GHz.) were experimentally and theoretically examined. Rotational components in each vibration were measured to determine the mutual interactions in each vibration between any of the vibrational levels investigated. The method … more
Date: December 1990
Creator: Al-Share, Mohammad A. (Mohammad Abdel)
Partner: UNT Libraries
open access

Reactions of the excited state of polypyridyl chromium(III) ion

Description: There has been much recent interest in the photochemistry and photophysics of transition metal polypyridine complexes due to the possibility of their use in solar energy conversion systems. The excited state of these compounds are known to undergo useful electron transfer and energy transfer reactions. This work attempts to elucidate the mechanism of the quenching of *CrL{sub 3}{sup 3+} (where L = 2,2{prime}-bipyridine, 4,4{prime}-dimethyl-2,2{prime}-bipyridine, 1,10-phenanthroline, 5-chloro-1,… more
Date: September 21, 1990
Creator: Steffan, Carl
Partner: UNT Libraries Government Documents Department
open access

Solution Studies of ⁶Li Enriched Organolithium Compounds Using New NMR Techniques

Description: With the values of 6Li T1 measured and the literature values of J(13C-6Li) for these compounds, three new 13C NMR techniques are developed for the analysis of organolithium compounds. Modifications to the spectrometer are discussed, as well as calibrations of the 6Li decoupler channel needed to set up these new experiments. The theoretical development of each technique is presented, as well as data from their verification, using organolithium compounds of known structure. Once qualified, the ne… more
Date: May 1990
Creator: Ellington, Donald H. (Donald Howard)
Partner: UNT Libraries
open access

Reverse Transfer Students: Students Who Transfer from Area Universities to the Junior College

Description: A study was conducted to identify demographic and academic characteristics of students transferring from North Texas area senior colleges to Tarrant County Junior College (Texas) in the Fall 1984 semester. Academic characteristics were measured at the point of transfer and during subsequent junior college enrollment(s) through Spring 1989. Transcripts of 608 reverse transfer students were examined. Non-Completers, students who transferred prior to completing a baccalaureate degree, were identif… more
Date: August 1990
Creator: Jackson, Cathie J. (Cathie Jean)
Partner: UNT Libraries
open access

Methylglyoxal Effects on Cell Division of Scenedesmus quadricauda (Scenedesmaceae)

Description: Cell division of ggeneflesmus quadricauda (Turp.) Breb. (Scenedesmaceae) is enhanced by methylglyoxal, a general inhibitor of cell division, at threshold concentration in conjunction with treatment timing related to growth stage of batch cultures. At 0.5 mM methylglyoxal concentration, cell division was significantly enhanced in algae treated in the logarithmic phase. Specific growth rates of methylglyoxal-treated cultures were rapidly increased at the beginning of logarithmic phase. Cultures i… more
Date: August 1990
Creator: Rhie, Kitae
Partner: UNT Libraries
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Pyrimidine nucleotide metabolism in Rhizobium meliloti: purification of aspartate transcarbamoylase from a pyrimidine auxotroph

Description: Rhizobium aspartate transcarbamoylase (ATCase; EC 2.1.3.2) was previously believed to be similar to the Pseudomonas ATCase which has been studied extensively. To facilitate the study of the Rhizobium ATCase a pyrimidine-requiring mutant of R. meliloti was isolated and used in the purification of the enzyme.
Date: December 1990
Creator: Eguae, Samuel Iyamu
Partner: UNT Libraries
open access

Characterization of the Specificity of DNA Uptake and Transformation by Naturally Competent Acinetobacter Calcoaceticus

Description: Although cultures of A. calcoaceticus BD413 are naturally competent at all growth phases, genetic markers can only be successfully transformed by DNA from the genus Acinetobacter. Transformation frequencies of nearly 1.2% were obtained with pcaA mutants were incubated in liquid culture with wild-type DNA.
Date: August 1990
Creator: Ahmadian-Tehrani, Mohsen
Partner: UNT Libraries
open access

Perceptions of Managers in Kuwait on the Role of the Multinational Corporations in Change in Kuwait

Description: The purpose of this study is to investigate the perceptions of managers in Kuwait (both Kuwaiti and non- Kuwaiti) on the effects of multinational corporations (MNCs) in Kuwait and whether these effects were beneficial. The problem motivating this study is the effects that MNCs have on the social, cultural, political, legal, economic, business, and technological environments of their host countries, especially in developing nations. This study is based on a survey of the perceptions of 1,344 man… more
Date: May 1990
Creator: Al-Daeaj, Hamad S. (Hamad Saleh)
Partner: UNT Libraries
open access

Nonphotochemical Hole Burning and Dispersive Kinetics in Amorphous Solids

Description: Results covering burn intensities in the nW to {mu}W/cm{sup 2} range, of dispersive hole growth kinetics are reported for Oxazine 720 in glycerol glasses and polyvinyl alcohol polymer films and their deuterated analogues. A theoretical model which employs a distribution function for the hole burning rate constant based upon a Gaussian distribution for the tunnel parameter is shown to accurately describe the kinetic data. This model incorporates the linear electron-phonon coupling. A method for … more
Date: September 21, 1990
Creator: Kenney, M. J.
Partner: UNT Libraries Government Documents Department
open access

The history and development of Karl Marx University at Leipzig

Description: The problem of the history and development of Karl Marx University at Leipzig (KMU) contains two fundamental questions:1) When did KMU begin? 2) Was there a continuity of traditions that influenced the development of KMU? The study examines the events contributing to the evolution of the university and explores the conflict of traditions and change. This study is a historical narrative of the development of KMU as a socialist university under the influence of Marxist-Leninist ideology based on … more
Date: December 1990
Creator: Laabs, Theodore R.
Partner: UNT Libraries
open access

Fusion

Description: My proposed objective was to create eight illustrations using Fusion as a tool to communicate concepts. I posed the following questions for evaluation. 1. Can I create two-dimensional illustrations effectively when applying the knowledge and techniques I have studied? 2. In what way will the use of multiple techniques affect the concept?
Date: August 1990
Creator: Hodges, Harlowe
Partner: UNT Libraries
open access

An Empirically Derived Typology of Single Custodial Fathers: Characteristics and Implications for Role Adjustment

Description: Eighty-seven single custodial fathers were surveyed to test the validity of previously developed typologies and/or construct a more empirically valid framework with implications for adjustment to the role. Mendes1 (1975) aggressive seekers, conciliatory seekers, conciliatory assenters, and aggressive assenters were compared to O'Brien's (1980) hostile seekers, conciliatory negotiators, and passive acceptors. In addition to demographic variables, relationship to ex-wife and child, and reasons fo… more
Date: May 1990
Creator: Theurer, Gregory W. (Gregory Wayne)
Partner: UNT Libraries
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