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K-shell x-ray production cross sections in carbon, oxygen, fluorine, sodium, magnesium, and aluminum by 0.5 to 8.0 mev protons, helium, and lithium ions (open access)

K-shell x-ray production cross sections in carbon, oxygen, fluorine, sodium, magnesium, and aluminum by 0.5 to 8.0 mev protons, helium, and lithium ions

The goal of this work reported here is to test the limits of the ECPSSR theory in the transition region of the low Z1/Z2.
Date: August 1991
Creator: Yu, Yueh-Chung
System: The UNT Digital Library
Using computers and student-oriented software to enhance teacher knowledge of mathematics and acceptance of computers in instruction (open access)

Using computers and student-oriented software to enhance teacher knowledge of mathematics and acceptance of computers in instruction

The problem with which this study is concerned is the possibility of increasing mathematical problem-solving knowledge of elementary school teachers and the acceptance of computers in instruction through the use of computers and student-oriented computer software.
Date: May 1991
Creator: Canaday, Kathlyn Y. (Kathlyn Yvonne)
System: The UNT Digital Library
Philosophical approaches to teacher evaluation (open access)

Philosophical approaches to teacher evaluation

The problem of this study is to educe and examine philosophical ideas embedded in major models of teacher evaluation. This study is qualitative, involving the presentation and analysis of ideas which affect educational practice.
Date: August 1991
Creator: Schwarz, Gretchen E. (Gretchen Ellen)
System: The UNT Digital Library
The cadenza: performance practice in alto trombone concerti of the eighteenth century (open access)

The cadenza: performance practice in alto trombone concerti of the eighteenth century

This study examines the history of the cadenza, as well as the fundamental elements of a good cadenza. This paper is intended to help the modern trombonist learn to create appropriate, original cadenzas for classical trombone concerti. Both historical and modern writing,as well as extant classical cadenzas are used as a guide.
Date: May 1991
Creator: Bruenger, David
System: The UNT Digital Library
The association between reading ability and test performance among adults of limited reading ability (open access)

The association between reading ability and test performance among adults of limited reading ability

This study examined adult students of limited reading ability, determining the extent to which their performance on a standardized examination was a function of their reading ability, rather than function of their knowledge of the material tested by the examination.
Date: December 1990
Creator: Fuller, Frank D. (Frank Davidson)
System: The UNT Digital Library
An investigation of the attitudes of selected professional classical solo singer-actors toward specific concerns of the music profession (open access)

An investigation of the attitudes of selected professional classical solo singer-actors toward specific concerns of the music profession

The purpose was to investigate attitudes of successful full-time performing classical singer-actors toward career concerns of the music profession. Five research problems were formulated to: (1) describe attitudes toward control of work conditions; (2) describe attitudes toward entrapment; (3) describe attitudes toward dependency; (4) report attitudes concerning current practices of training the solo singer; and (5) identify commonalities among the subjects regarding demographic, the attitudes described in problems one through four, and demeanor during the interviews.
Date: December 1990
Creator: VanEaton, Sunny F. C.
System: The UNT Digital Library
Mechanisms of rapid receptive field reorganization (open access)

Mechanisms of rapid receptive field reorganization

Rapid receptive field (RF) reorganization of somatosensory neurons in the cat dorsal column nuclei (DCN) was studied using electrophysiological and histological methods. Soon after denervation of the peripheral RF by lidocaine injection, every DCN neuron tested exhibited a reorganized RF.
Date: May 1995
Creator: Pettit, Michael J. (Michael James)
System: The UNT Digital Library
An investigation of the effects of presentation format and time pressure on decision makers performing tasks of varying complexitites (open access)

An investigation of the effects of presentation format and time pressure on decision makers performing tasks of varying complexitites

The primary objective of this study was to determine which presentation format leads to better decision performance when the decision maker solving a problem of certain complexity is experiencing a certain level of time pressure.
Date: December 1990
Creator: Hwang, Mark I. (Mark Ing-Hwa)
System: The UNT Digital Library
Three Woody Allen films: the maturing of a filmmaker (open access)

Three Woody Allen films: the maturing of a filmmaker

This thesis examines Allen's development using Annie Hall (1977), Manhattan (1979), and Hannah and Her Sisters (1986) as landmarks. Three criteria (chapters) structure the analysis: comedy, narrative, and romance.
Date: August 1992
Creator: Jeter, Russell D. (Russell Daniel)
System: The UNT Digital Library
Arthur Garfield Dove's landscape assemblages: a unique intersection of European modernism, American ideas, and nature-based abstraction (open access)

Arthur Garfield Dove's landscape assemblages: a unique intersection of European modernism, American ideas, and nature-based abstraction

In the middle of his career, Arthur Garfield Dove created a smell yet novel body of landscape assemblages. They illustrate Dove's central interest in evoking nature--its motifs and rhythms--through imaginative associations of organic and man-made materials. These works represent Dove's synthesis of contemporary European stylistic and intellectual ideas as well as American philosophies and concerns. They also reflect the influence of Alfred Stieglitz and his circle and the artist Helen Torr, Dove's second wife. This study examines how Dove used a complex interplay of European theory and technique, American ideas and his own nature-based abstract style to create the landscape assemblages, works that are uniquely independent in the history of American art.
Date: August 1993
Creator: Reece-Hughes, Shirley (Shirley Ellen)
System: The UNT Digital Library
Gustav Mahler's use and cyclic integration of motivic and thematic quotations (open access)

Gustav Mahler's use and cyclic integration of motivic and thematic quotations

All of Mahler's works may be divided into four distinct chronological groups, referred to as "symphonic cycles." Motives and themes from the songs within each symphonic cycle were quoted in symphonies in the same cycle. This system of self reference was unique to Mahler, although earlier composers such as Schubert and Wagner set precedents for some of the techniques used by Mahler. The quotations in the early periods appeared only on the surface and did not blend well with their surroundings, but as time progressed Mahler developed the ability to combine the seemingly incompatible elements more smoothly. Mahler's early fascination with distant sounds was also a factor in his use of quotations. The appendix contains a catalog of 100 quotations.
Date: May 1990
Creator: Zurflieh, Sharon E. (Sharon Elizabeth)
System: The UNT Digital Library
The life and legend of Godfrey of Bouillon: the development of a cultural hero in art and literature (open access)

The life and legend of Godfrey of Bouillon: the development of a cultural hero in art and literature

In the fourteenth century Jacques de Longuyon popularized the theme of the nine worthies in his poem Les Voeux du Paon. Gofrey of Bouillon, Duke of Lower Lorraine and Protector of the Holy Sepulchre, was the last of the Christian Worthies in the poem. In his life and legends he exemplified the medieval world's heroic ideal. His achievement, the recovery of the Holy City for Christianity, was the pinnacle-the crowning glory-for the western world. By examining the historical fact of Godfrey's life and comparing it to legends and artistic renderings of that life, one can learn more about the time during which he lived and the people of which he was a part.
Date: August 1992
Creator: Lynass, Kathryn R. (Kathryn Rose)
System: The UNT Digital Library
Creation and Characterization of an Escherichia Coli and Pseudomonas Putida Hybrid Aspartate Transcarbamoylase (open access)

Creation and Characterization of an Escherichia Coli and Pseudomonas Putida Hybrid Aspartate Transcarbamoylase

Aspartate transcarbamoylase (ATCase) is encoded by the pyrBI genes in E. coli. Expression of these genes is reduced four-fold by attenuation when grown on uracil. Using plasmid, pRO1727. the pyrB and the pyrBI genes from E. coli were cloned into a P. putida pyrB auxotroph. A recombinant pyrB gene was recovered that encoded a functional hybrid ATCase with a molecular weight of 470 kDa.
Date: December 1992
Creator: Ruley, Jill R. (Jill Rosanne)
System: The UNT Digital Library
Picosecond degenerate four-wave mixing in semiconductors (open access)

Picosecond degenerate four-wave mixing in semiconductors

This study reports on a variety of experimental and theoretical studies conducted in ZnSe, CdTe, and in semiconductor-doped glasses. The transient picosecond degenerate four-wave mixing (DFWM) experiments performed in these II-VI direct-gap semiconductors are part of our efforts to understand the picosecond dynamics of the free-carriers generated via two and three-photon absorption.
Date: May 1990
Creator: Canto, Edesly J.
System: The UNT Digital Library
An In Vitro Study of the Effects of Methylprednisolone on Lesioned and Uninjured Mammalian Spinal Cord Neurons (open access)

An In Vitro Study of the Effects of Methylprednisolone on Lesioned and Uninjured Mammalian Spinal Cord Neurons

The studies reported in this dissertation constitute the first evidence that methylprednisolone (MP) has been shown to ameliorate specific components of secondary trauma including ischemia, lactic acidosis, and lipid peroxidation.
Date: December 1993
Creator: Rosenberg-Schaffer, Lisa (Lisa Jo)
System: The UNT Digital Library
Evidence for a Role of the Multifunctional Calcium/Calmodulin-Dependent Protein Kinase II in Insulin Secretion (open access)

Evidence for a Role of the Multifunctional Calcium/Calmodulin-Dependent Protein Kinase II in Insulin Secretion

Calcium/calmodulin-dependent protein kinase II (CaM kinase II) is demonstrated to exist in the ß-cell and immunopecipitation. Glucose and potassium significantly stimulate the rapid autophosphorylation of CaM kinase II and proportionally induce autonomous activity of the kinase in a dose-dependent manner that parallels insulin secretion. The activation of CaM kinase II, alloxan, KN-62 and KN-93, suggest that the enzyme is an integral component of insulin secretion and/or related processes in the β-cell.
Date: December 1993
Creator: Wenham, Robert M. (Robert Michael)
System: The UNT Digital Library
The Phospholipase B Response in Rats Infected with Fasciola Hepatica and Demonstration of the Enzyme-Parasitic Interaction (open access)

The Phospholipase B Response in Rats Infected with Fasciola Hepatica and Demonstration of the Enzyme-Parasitic Interaction

Fasciola hepatica was studied in outbred rats to determine of infection would cause an increase phospholipase B activity and the percentage of periperal blood eosinophilis. A second experiment was performed to investigate eosinophilis.
Date: December 1999
Creator: Patcharapinyopong, Chaiwut
System: The UNT Digital Library
A Comparison of Universal Soil Loss Equation Results Using a Remote Sensing/GIS Technique to Results Obtained Using a Field Survey Technique (open access)

A Comparison of Universal Soil Loss Equation Results Using a Remote Sensing/GIS Technique to Results Obtained Using a Field Survey Technique

Digital satellite remote sensing and Geographic Information Systems (GIS) have been used in conjunction with the Universal Soil Loss Equation (USLE) to model soil erosion potential within watersheds. This study compared erosion estimates calculated by the remote sensing method to results obtained in the field by soil conservationists using conventional methods.
Date: December 1990
Creator: Hunter, Bruce Allan
System: The UNT Digital Library
The Morphology of Azotobacter Vinelandii Grown in Dialyzed Soil Medium (open access)

The Morphology of Azotobacter Vinelandii Grown in Dialyzed Soil Medium

This research describes the changes in cell morphology of Azotobacter vinelandii cells cultured in dialyzed soil medium. This particular culture medium was assumed to provide the bacteria with an environment similar to their natural habitat, the soil.
Date: August 1992
Creator: Jradi, Hoda A.
System: The UNT Digital Library
Pathologies in Earthworms: Sublethal Biomarkers of Xenobiotic Toxicity (open access)

Pathologies in Earthworms: Sublethal Biomarkers of Xenobiotic Toxicity

This research is part of an overall program to develop and use a suite of acute and sublethal toxicity biomarkers, and testing protocols for use in assaying potential effects of complex mixtures of xenobiotics such as found in soils containing agricultural biocides and petrochemical wastes dredged sediments, and hazardous waste sites (HWS). The purpose of this study was to evaluate four biomarkers of sublethal pathology that could be used in an integrative model of multiple toxicity endpoints with the earthworm Lumbricus terrestris.
Date: May 1991
Creator: Cikutovic Salas, Marcos A.
System: The UNT Digital Library
Screening of Steroids from Plants Using Saccharomyces Cerevisiae as a Host System (open access)

Screening of Steroids from Plants Using Saccharomyces Cerevisiae as a Host System

The reconstituted steroid transcription unit in Saccharomyces cerevisae was used to screen for steroids in cell extracts prepared from 24 species of plants representing 16 families. Extracts from 7 species representing 5 families were able to activate both estrogen and progesterone receptors expressed in yeast.
Date: August 1992
Creator: Maier, Camelia G. A. (Camelia Gabriela-Anca)
System: The UNT Digital Library
Synthesis, Purification and Pharacterization of Small Mono(ADP-Ribosyl)ated Molecules in the ADP-Ribose Elongation Reaction Catalyzed by Poly(ADP-ribose)Polymerase (open access)

Synthesis, Purification and Pharacterization of Small Mono(ADP-Ribosyl)ated Molecules in the ADP-Ribose Elongation Reaction Catalyzed by Poly(ADP-ribose)Polymerase

The ADP-ribose elongation catalyzed by poly(ADP-ribose) polymerase (PARP) [EC 2.2.2.30] has been partially characterized utilizing mono (ADP-ribosyl)ated polyamines. Arginine methyl ester (AME)-(ADP-ribose) and agmatine (AGMT)-(ADP-ribose) were synthesized enzymatically with a eukarytic mono(ADP-ribosyl) transferase and cholera toxin, respectively.
Date: December 1993
Creator: Pacheco-Rodriguez, Gustavo
System: The UNT Digital Library
An Analysis of Adding Land Cover as a Variable to the DRASTIC Ground Water Model (open access)

An Analysis of Adding Land Cover as a Variable to the DRASTIC Ground Water Model

This study involved a geographic information systems (GIS) approach to modeling ground water pollution potential in the Southern Edwards Aquifer Region in Texas. The DRASTIC ground water model was analyzed using two methods. First, the effects of adding land cover data to the drastic model were evaluated. In the second approach, the effects of the removal of DRASTIC variables were evaluated. Six, five, and four variable models were generated and analyzed.
Date: December 1993
Creator: Klingler, Thomas H. (Thomas Henry)
System: The UNT Digital Library
In Vitro Studies of the Effects of Hypothermia on Lesioned and Uninjured Mammalian Spinal Cord Neurons (open access)

In Vitro Studies of the Effects of Hypothermia on Lesioned and Uninjured Mammalian Spinal Cord Neurons

The effects of hypothermia on cultured mammalian (mouse) spinal cord neurons which had been subjected to a defined physical trauma (amputation of a primary dendrite 100μM from the perikaryon) were investigated.
Date: May 1991
Creator: Wang, Guofang
System: The UNT Digital Library