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L-asparaginase II Production by Escherichia coli

Growth of Escherichia coli A-l under aerobic conditions in an enriched medium with a total amount of 0.2 per cent glucose was biphasic and asparaginase II activity was detected after depletion of ammonia from the growth medium in the second phase of growth. Glucose was exhausted two hours before ammonia and three hours before asparaginase II activity was detected. The concentration of 3',5'-cyclic adenosine monophosphate was found to fluctuate when the dissolved oxygen in the medium reached a l… more

Date: May 1985

Creator: Johnson, Terrance L. (Terrance Lewyne), 1950-

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Induction of Interferon Messenger RNA and Expression of Cellular Oncogenes in Human Lymphoblastoid Cells

The purposes of this study was to demonstrate the induction of alpha interferon mRNA in Sendai virus-induced Namalava cells, to follow the level of alpha interferon mRNA synthesis at the transcriptional level, and to determine whether the Namalava cell line expresses the c-myc oncogene and to what degree. The amount of c-myc message deteted in Namalva cell RNA was about one-tenth that of Daudi cell RNA, whereas no difference in the amount of the c-Ha-ras message was observed between the two cel… more

Date: December 1986

Creator: Mahmoudi, Massoud

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Microsatellite-based genetic profiling for the management of wild and captive flamingo populations.

Flamingo species generate tremendous interest whether they are small captive groups or wild populations numbering in the thousands. Genetic pedigrees are invaluable for maintaining maximum genetic diversity in captive, as well as wild, populations. However, presently there is a general lack of genetic data for flamingo populations. Microsatellites are loci composed of 2-6 base pair tandem repeats, scattered throughout higher eukaryotic genomes, often exhibiting high levels of polymorphism an… more

Date: December 2005

Creator: Kapil, Richa

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

The Role of Learning in Visual Field Asymmetries

This paper examines visual field asymmetries and their relationship with learning through a study of three groups of 309 people. Richard Herrington discusses the results of subjects performing two visual half-field advantage reaction time tasks, a bar graph task and a word task, as well as both tasks, with extended practice.

Date: December 1996

Creator: Herrington, Richard

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Role of Calcium and Phospholipids in Transepithelial Sodium Ion and Water Transport in Amphibian Epithelia

The present investigation is concerned with determining the role of calcium, phospholipids, and phospholipid metabolites on transepithelial sodium and water transport in response to antidiuretic hormone (ADH). These studies utilize the frog skin for determining sodium transport and amphibian urinary bladder for water flow measurements and scanning electron microscopy of cell surface morphology. The results demonstrate that phospholipids and phospholipid metabolites containing arachidonic acid s… more

Date: August 1983

Creator: Tarapoom, Nimman

Item Type: Thesis or Dissertation

Partner: UNT Libraries

Influence of Cholesterol Import on Aspergillus fumigatus Growth and Antifungal Suscepibility

Invasive pulmonary aspergillosis is a life-threatening fungal infection commonly observed in immunocompromised patients and has a mortality rate approaching 100% once the disease is disseminated. Aspergillus fumigatus is the most common pathogen. Early diagnosis improves the prognosis but is very difficult since most signs and symptoms are nonspecific. Antifungal therapy, usually based on sterol biosynthesis inhibitors, is also of limited efficacy. In my attempts to discover a diagnostic st… more

Access: Restricted to the UNT Community Members at a UNT Libraries Location.

Date: December 2003

Creator: Hassan, Saad A.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

The Unification of Clay and Steel in the Representation of Machined Forms From My Past

This paper discusses the author's art works, which involved the integration of clay and steal to create sculptures of pipe forms similar to the machined forms they worked with in the agriculture and oil industries. Vicente García discusses the methodology of creation and analyzes the works.

Date: May 1993

Creator: García, Vicente

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

A Visual Study of Folk Art Death Imagery Used During the Day of the Dead Celebration in Mexico

This paper discusses the author's work creating five collagraph prints based on imagery used during the Mexican Day of the Dead celebration and the process of making these prints. Eduardo J. Garcia discusses how heritage impacted these works and explores the meaning behind the folk art imagery.

Date: December 1994

Creator: Garcia, Eduardo J.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Control, Commitment, and Challenge: Relationships to Stress, Illness, and Gender

Male and female college students were administered scales assessing their daily hassles, negative life events, control, commitment, challenge, psychological symptomatology, psychological distress, and physical symptomatology. Stepwise multiple regression analyses showed that control, commitment, and challenge act in an additive (rather than multiplicative) manner in relation to psychological and physical outcome measures.

Date: May 1992

Creator: Embry, Judy K.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

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

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-

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

An Analysis of Respiratory Mechanisms Controlling Exercise Hyperpnea During Cycle Ergometry Conducted at Selected Workloads and Pedal Frequencies

Respiratory and metabolic patterns in response to variations in exercise workload (WL) and pedal frequency (RPM) were examined in 10 healthy males. Each subject performed WLs of low (L), moderate (M) and high (H) intensity, equivalent to 25%, 50% and 75% V02 m a x at 7 pedal frequencies (40, 50, 60, 70, 80, 90 and 100 RPM). ANOVA ( 3 X 7 design) indicated that WL and RPM had independent and significant effects on all respiratory and metabolic measures; i.e., the greater the WL and RPM, the high… more

Date: December 1986

Creator: Wise, Charles Hamilton

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Psychological Stress: Effect on Humoral Immune Functioning as Measured by Immunoglobulin Levels

The purpose of the present study was to determine if psychological stress, defined as academic examination stress, would systematically produce changes in immune parameters (immunoglobulin concentration) and psychological functioning. It was hypothesized that as examination stress occurred there would be an effect on immunological function consistent with heightened psychological activity/stress. Subjects were 23 master's and doctoral students in psychology who volunteered for the research proj… more

Date: December 1986

Creator: Didriksen, Nancy A. (Nancy Andrews)

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Effect of Anterior or Ventromedial Hypothalamic Stimulation on Immunoglobulin G

Although research has linked central nervous system activity with changes in immunoresponsivity, research on the possible role of the central nervous system in altering a specific class of antibody is lacking. This study was an investigation of the possible relationship between anterior or medial hypothalamic functions on Immunoglobulin G. concentrations in rat serum. Thirty-six male albino rats were randomly assigned to three groups of equal size. Animals within the anterior hypothalamic grou… more

Date: August 1983

Creator: Lambert, Paul L. (Paul Louis)

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

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

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-

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Lethal and Sublethal Effects of Hemoxidants, Particularly Nitrite, on Selected Aquatic Animals

A research program was developed to investigate basic and applied aspects of toxicity, both lethal and sublethal, of hemoxidants, particularly nitrite, on fish, non-fish aquatic vertebrates, and crayfish. The major objectives of this research were to determine A) acute and sublethal toxicity of nitrite to selected aquatic organisms: 1. aquatic salamander larvae, Ambystoma texanum, 2. swamp crayfish, Procambarus simulans, 3. bluegill, Lepomis macrochirus, 4. bullfrog, tadpoles, Rana catesbiana, … more

Date: May 1982

Creator: Huey, David W. (David Worley)

Item Type: Thesis or Dissertation

Partner: UNT Libraries

The Confederate Pension Systems in Texas, Georgia, and Virginia: The Programs and the People

The United States government began paying pensions to disabled Union veterans before the Civil War ended in April 1865. By 1890 its pension programs included any Union veteran who had fought in the Civil War, regardless of his financial means, as well as surviving family members, including mothers, fathers, brothers, and sisters. Union veterans did not hesitate to "wave the bloody shirt" in their attempts to liberalize pension laws. Pension programs for Confederate veterans were much slower to … more

Access: Restricted to UNT Community Members. Login required if off-campus.

Date: December 2004

Creator: Wilson, Mary L.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Do the Hemispheres Learn at Different Rates: Further Examination of Hemispheric Differences Using a Random Polygon Task

This paper examines the learning rate of the two different hemispheres of the brain and compares them through a study. Lance Hoffmeyer explains the findings derived from a test conducted through having subjects complete a random polygon task.

Date: December 1996

Creator: Hoffmeyer, Lance

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Impaired virulence factor production in a dihydroorotate dehydrogenase mutant (pyrD) of Pseudomonas aeruginosa.

Previous research in our laboratory showed that when knockout mutations were created in the pyrB and pyrC genes of the pyrimidine pathway in Pseudomonas aeruginosa, not only were the resultant mutants auxotrophic for pyrimidines but they were also impaired in virulence factor production. Such a correlation had not been previously reported for P. aeruginosa, a ubiquitous opportunistic pathogen in humans. In an earlier study it was reported that mutants blocked in one of the first three enzymes … more

Date: December 2005

Creator: Ralli, Pooja

Item Type: Thesis or Dissertation

Partner: UNT Libraries

Pyrimidine Enzyme Specific Activity at Four Different Phases of Growth in Minimal and Rich Media, and Concomitant Virulence Factors Evaluation in Pseudomonas aeruginosa

Pseudomonas aeruginosa is a Gram-negative rod, aerobic, non-fermenting, oxidase positive, pigment producing, and nutritionally versatile bacterium. Infections by P. aeruginosa are the most important cause of morbidity and mortality in immunocompromised patients, given virulence factor production that suppresses antibiotic therapy and promotes persistent infection. This research is the first comprehensive report of the pyrimidine biosynthetic pathway for all phases of growth in minimal and ric… more

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Date: December 2005

Creator: Azad, Kamran Nikkhah

Item Type: Thesis or Dissertation

Partner: UNT Libraries

Isolation and Characterization of Polymorphic Loci from the Caribbean Flamingo (Phoenicopterus ruber ruber): New Tools for Wildlife Management

Methods to determine genetic diversity and relatedness within populations are essential tools for proper wildlife management. Today the approach of choice is polymerase chain reaction-based microsatellite analysis. Seven new polymorphic loci were isolated from a microsatellite-enriched Caribbean flamingo genomic library and used to characterize survey populations of Caribbean and African greater flamingos. In addition, four of these loci were used to verify parentage relationships within a cap… more

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Date: December 2005

Creator: Preston, E. Lynn

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Regulation of pyrimidine biosynthesis and virulence factor production in wild type, Pyr- and Crc- mutants in Pseudomonas aeruginosa.

Previous research in our laboratory established that pyrB, pyrC or pyrD knock-out mutants in Pseudomonas aeruginosa required pyrimidines for growth. Each mutant was also discovered to be defective in the production of virulence factors. Moreover, the addition of exogenous uracil did not restore the mutant to wild type virulence levels. In an earlier study using non-pathogenic P. putida, mutants blocked in one of the first three enzymes of the pyrimidine pathway produced no pyoverdine pigment w… more

Date: May 2006

Creator: Asfour, Hani

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Frontier Defense in Texas: 1861-1865

The Texas Ranger tradition of over twenty-five years of frontier defense influenced the methods by which Texans provided for frontier defense, 1861-1865. The elements that guarded the Texas frontier during the war combined organizational policies that characterized previous Texas military experience and held the frontier together in marked contrast to its rapid collapse at the Confederacy's end. The first attempt to guard the Indian frontier during the Civil War was by the Texas Mounted Rifles,… more

Date: December 1987

Creator: Smith, David Paul, 1949-

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Differences in Anxiety Symptoms in First-Time and Multiple Incarcerates

This paper presents a study of the anxiety symptoms of first-time and multiple time incarcerates and the differences in number of symptoms. Vianey Reinhardt discusses the findings of the study conduced with 129 male offenders who were assessed through a series of tests.

Date: December 1996

Creator: Reinhardt, Vianey R.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Imagery and Form

This paper discusses the integration of imagery and form in the author's works, wheel thrown pottery intended to make an individualized statement. Steven L. Phillips discusses the process of making these forms and the imagery they contain, drawing connections to philosophical concepts.

Date: May 1994

Creator: Phillips, Steven L.

Item Type: Thesis or Dissertation

Partner: UNT Libraries