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  Partner: UNT Libraries
 Degree Discipline: Biology
 Degree Level: Master's
 Collection: UNT Theses and Dissertations
Nicotinic Acetylcholine Receptor α3 mRNA in Rat Visual System After Monocular Deprivation

Nicotinic Acetylcholine Receptor α3 mRNA in Rat Visual System After Monocular Deprivation

Date: August 1997
Creator: Taylor, James H. (James Harvey), 1970-
Description: In situ hybridization was used to examine effects of monocular enucleation on nicotinic acetylcholine receptor subunit cc3 mRNA in the rat dLGNand visual cortex. After 28 days postoperative, there were no significant differences in α3 mRNA density between the contralateral (deprived) and ipsilateral (non-deprived) sides. The lack of obvious effects of visual deprivation on α3 mRNA density suggests that other factors, possibly intrinsic to dLGNand visual cortex, govern the postnatal expression of α3 mRNA.
Contributing Partner: UNT Libraries
Advanced Molecular and Microbial Techniques: a Complete Laboratory Notebook

Advanced Molecular and Microbial Techniques: a Complete Laboratory Notebook

Date: May 1998
Creator: Brito-Rodriquez, Carmen Lydia
Description: The purpose of this project is to produce a complete and thorough notebook that may be used to supplement laboratory coursework. Its intent is to be used primarily by the students to aid them in understanding background information and the proper laboratory procedures involved in various types of experiments. The laboratory notebook is a summation of all the experiments and procedures used in the six-credit hour Advanced Microbial and Molecular Biology (BIOL 5160) course offered during the summer semester at the University of North Texas. This class is a team taught effort by Professors O'Donovan and Kunz. The course is constructed as an intensive practice exercise to teach the student about gene mutations, biosynthetic pathways, preparation and analysis of plasmid DNA, and many other topics included in the notebook.
Contributing Partner: UNT Libraries
Regulation of Escherichia coli pyrBI Gene Expression in Pseudomonas fluorescens

Regulation of Escherichia coli pyrBI Gene Expression in Pseudomonas fluorescens

Date: May 1995
Creator: Shen, Weiping
Description: Pseudomonas fluorescens does not appear to regulate the enzymes of de novo pyrimidine biosynthesis at the level of gene expression. Little or no apparent repression of pyr gene expression is observed upon addition of exogenous pyrimidines to the growth medium. The Escherichia coli pyrBI genes for aspartate transcarbamoylase (ATCase) were sized down and cloned into the broad host range plasmid, pKT230. Upon introduction into a P.fluorescenspyrB mutant strain, ATCase showed repression in response to exogenously fed pyrimidine compounds. Thus, it was possible to bring about changes in pyrimidine nucleotide pool levels and in transcriptional regulation of gene expression at the same time.
Contributing Partner: UNT Libraries
The Use of Genetic Polymorphisms and Discriminant Analysis in Evaluating Genetic Polymorphisms as a Predictor of Population

The Use of Genetic Polymorphisms and Discriminant Analysis in Evaluating Genetic Polymorphisms as a Predictor of Population

Date: May 2002
Creator: Howell, Bruce F.
Description: Discriminant analysis is a procedure for identifying the relationships between qualitative criterion variables and quantitative predictor variables. Data bases of genetic polymorphisms are currently available that group such polymorphisms by ethnic origin or nationality. Such information could be useful to entities that base financial determinations upon predictions of disease or to medical researchers who wish to target prevention and treatment to population groups. While the use of genetic information to make such determinations is unlawful in states and confidentiality and privacy concerns abound, methods for human “redlining” may occur. Thus, it is necessary to investigate the efficacy of the relationship of certain genetic information to ethnicity to determine if a statistical analysis can provide information concerning such relationship. The use of the statistical technique of discriminant analysis provides a tool for examining such relationship.
Contributing Partner: UNT Libraries
Neuronal Network Analyses in vitro of Acute Individual and Combined Responses to Fluoxetine and Ethanol

Neuronal Network Analyses in vitro of Acute Individual and Combined Responses to Fluoxetine and Ethanol

Date: August 2002
Creator: Xia,Yun
Description: Embryonic murine neuronal networks cultured on microelectrode arrays were used to quantify acute electrophysiological effects of fluoxetine and ethanol. Spontaneously active frontal cortex cultures showed highly repeatable, dose-dependent sensitivities to both compounds. Cultures began to respond to fluoxetine at 3 µM and were shut off at 10-16 µM. EC50s mean ± S.D. for spike and burst rates were 4.1 ± 1.5 µM and 4.5 ± 1.1 µM (n=14). The fluoxetine inhibition was reversible and without effect on action potential wave shapes. Ethanol showed initial inhibition at 20 mM, with spike and burst rate EC50s at 52.0 ± 17.4 mM and 56.0 ± 17.0 mM (n=15). Ethanol concentrations above 100 -140 mM led to cessation of activity. Although ethanol did not change the shape and amplitude of action potentials, unit specific effects were found. The combined application of ethanol and fluoxetine was additive. Ethanol did not potentiate the effect of fluoxetine.
Contributing Partner: UNT Libraries
Functional Neural Toxicity and Endocrine Responses in Mice Following Naphthalene Exposure

Functional Neural Toxicity and Endocrine Responses in Mice Following Naphthalene Exposure

Date: August 2010
Creator: Colbert, Crystal
Description: Polycyclic aromatic hydrocarbons (PAHs) are a well studied and diverse class of environmental toxicants. PAHs act via the aryl hydrocarbon receptor (AhR), and studies have suggested that PAHs may elicit neurological and estrogenic effects. Doses of PAHs between 50 to 150 ppm may elicit neurotoxicity in rodent models. The present study investigated the effects of naphthalene on in vivo steroidogenesis in Swiss Webster male mice, and in vitro neural function of Balb-C/ICR mice frontal cortex neurons. These data suggest that naphthalene may not elicit steroidogenic effects at concentrations ranging from 0.2 to 25 mg/kg/day, following a 7 day subcutaneous dosing regime. In addition, naphthalene may cause functional toxicity of frontal cortex neurons at concentrations of 32 to 160 ppm naphthalene.
Contributing Partner: UNT Libraries
A Physiological Age-Grading System for Female Hydrellia pakistanae  Deonier (Diptera: Ephydridae)

A Physiological Age-Grading System for Female Hydrellia pakistanae Deonier (Diptera: Ephydridae)

Access: Use of this item is restricted to the UNT Community.
Date: December 2002
Creator: Lenz, Jennifer Marie
Description: Conflicting opinions about the effectiveness of H. pakistanae as a biological control agent for hydrilla prompt researchers to find a method for assessing the fly's success. Developing a physiological age-grading system for the fly using ovarian morphology to detect changes in reproductive activity is useful for evaluating reproductive status of the fly in field populations. Changes in the appearance of follicular relics in ovaries with oviposition provide a reliable method to estimate fecundity. Characteristics of follicular relics were used to develop a system with eight physiological age classes, three nulliparous and five parous. Changes that occur in the fat body were used to assist in classification of nulliparous females or those with low egg counts.
Contributing Partner: UNT Libraries
Population Dynammics in Mixed Cultures of Microorganisms

Population Dynammics in Mixed Cultures of Microorganisms

Date: January 1970
Creator: Koepp, Leila K.
Description: The purpose of this study was to determine the effect of substrate levels and different types of substrates on population changes of mixed cultures of Serratia marcescens and Saccharomyces cerevisiae, as compared to pure cultures.
Contributing Partner: UNT Libraries
Factors Affecting Pigment Production in Mycobacterium rhodocrous

Factors Affecting Pigment Production in Mycobacterium rhodocrous

Date: June 1970
Creator: Chamberlain, Charlene
Description: This study was undertaken in order to isolate and identify the pigment, if possible, and to determine the effect of substrate, substrate concentration, light exposure, and pH on pigment production in this organism.
Contributing Partner: UNT Libraries
Individual, Social, and Seasonal Behavior of the Thirteen-Lined Ground Squirrel (Spermophilus tridecemlineatus)

Individual, Social, and Seasonal Behavior of the Thirteen-Lined Ground Squirrel (Spermophilus tridecemlineatus)

Date: January 1970
Creator: Wistrand, Harry E.
Description: The purpose of this study is to provide a qualitative, detailed description of individual and social behavior in a free-living population of thirteen-lined ground squirrels. Behavioral differences in relation to various periods of the annual cycle are also evaluated.
Contributing Partner: UNT Libraries
Antibody Adsorption Used in Identification of Similar Streptomyces Species

Antibody Adsorption Used in Identification of Similar Streptomyces Species

Date: January 1970
Creator: Lassiter, Carroll B.
Description: This investigation involved the production of specific antisera against known International Streptomyces project strains of Streptomyces.
Contributing Partner: UNT Libraries
Metabolism of Methylglyoxal by Scenedesmus Quadricauda

Metabolism of Methylglyoxal by Scenedesmus Quadricauda

Date: June 1970
Creator: Rounsavall, Terry Yale
Description: The purpose of this study was to investigate the metabolic pathways of methylglyoxal in S. quadricauda.
Contributing Partner: UNT Libraries
Studies on Microorganisms in Jet Aircraft Fuel Systems

Studies on Microorganisms in Jet Aircraft Fuel Systems

Date: May 1970
Creator: Crum, Morris Glenn
Description: Laboratory and field investigations during the past ten years have demonstrated that certain microorganisms can cause deleterious effects in jet fuel tank systems. These investigations have brought about new concepts concerning the mechanisms of utilization of certain constituents in jet fuel tanks by microorganisms. Since the presence of microorganisms is inevitable in fuel systems, research efforts have been directed towards identification and determination of the types of microorganisms which can utilize jet fuel hydrocarbons, fuel additives, polyurethane foam structural materials, and particular hydrocarbons present in the fuel.
Contributing Partner: UNT Libraries
Terrestrial Vertebrates of Fannin County, Texas

Terrestrial Vertebrates of Fannin County, Texas

Date: January 1970
Creator: McCuller, Ronald E.
Description: The purposes of this thesis were (1) to provide some knowledge of the herptiles and mammals of this area, (2) to clarify the distribution of many of these animals in this section of Texas, and (3) to provide additional ecological information about the area.
Contributing Partner: UNT Libraries
An Ecological Survey of the Reptiles and Amphibians of Wise county, Texas

An Ecological Survey of the Reptiles and Amphibians of Wise county, Texas

Date: January 1970
Creator: Welch, Donald A.
Description: The purpose of this study was to record the relationships between the reptiles and amphibians of Wise County and the ecological subdivisions of the area. Wise County was chosen because of the heterogenity of the area and because of its proximity to other counties which have been previously and similarly studied.
Contributing Partner: UNT Libraries
Growth Inhibition of Chlorella Pyrenoidosa TX71105 by an Unknown Soil Bacillus

Growth Inhibition of Chlorella Pyrenoidosa TX71105 by an Unknown Soil Bacillus

Date: August 1968
Creator: Harrel, Steve K.
Description: The purpose of this paper is to present data on the nature of mixed cultures of algae and bacteria and to report new evidence of growth inhibition of Chlorella by a bacterial contaminant isolated from a soil environment.
Contributing Partner: UNT Libraries
The Effects of Simulated Altitude on the Intestinal Flora of Guinea Pigs

The Effects of Simulated Altitude on the Intestinal Flora of Guinea Pigs

Date: May 1969
Creator: Funderburk, Noel R.
Description: The purpose of this paper is to report the results of studies on the aerobic, mesophilic intestinal flora of guinea pigs subjected to conditions similar to those encountered by man in spacecraft.
Contributing Partner: UNT Libraries
Distribution of Phosphates in a Sewage Plant and its Receiving Waters

Distribution of Phosphates in a Sewage Plant and its Receiving Waters

Date: May 1969
Creator: Hansard, John D.
Description: The purpose of this paper is to detail the distribution and quantity of soluble phosphates in an activated sludge plant, its discharge creek, and receiving reservoir. The resultant analyses and comparison of data should provide some better understanding of the fate of phosphorus in a Southwestern waterway system.
Contributing Partner: UNT Libraries
Transferrin Inheritance in the Pigeon, Columba livia

Transferrin Inheritance in the Pigeon, Columba livia

Date: August 1968
Creator: Sharp, H. Bryan, Jr.
Description: This study investigated transferrin inheritance in homing pigeons (Columba livia), using discontinuous acrylamide gel electrophoresis on rivanol treated serum.
Contributing Partner: UNT Libraries
Effects of X-irradiation on Ion Flux in Desheathed Toad Sciatic Nerves

Effects of X-irradiation on Ion Flux in Desheathed Toad Sciatic Nerves

Date: January 1969
Creator: Albin, Leslie O.
Description: The purpose of this thesis is to determine the effects of x-irradiation on the efflux of potassium, sodium and calcium ions from stimulated and unstimulated desheathed sciatic nerves.
Contributing Partner: UNT Libraries
Effects of n-Decenylsuccinic Acid (n-DSA) and It's Monomethyl Ester (m-MDSA) on Water and Ion Flux in Isolated Roots

Effects of n-Decenylsuccinic Acid (n-DSA) and It's Monomethyl Ester (m-MDSA) on Water and Ion Flux in Isolated Roots

Date: January 1969
Creator: Teng, Yao-sheng
Description: The purpose of this study was (1) to measure the changes in water flux in isolated roots exposed to n-DSA and its mono-methly ester (m-MDSA) using a photometric technique in the absence of an externally applied suction and (2) to measure the flux of Na and K in similarly treated roots using a flame photometric method.
Contributing Partner: UNT Libraries
Growing Earthworms in Artificial Environments

Growing Earthworms in Artificial Environments

Date: August 1968
Creator: Olaniran, David A.
Description: This study is intended to investigate the artificial environment conditions that would favor the most effective propagation of the African night crawler.
Contributing Partner: UNT Libraries
The Inheritance of Serum Alkaline Phosphatase in the Pigeon (Columba livia)

The Inheritance of Serum Alkaline Phosphatase in the Pigeon (Columba livia)

Date: August 1968
Creator: Manley, James H.,Jr.
Description: The purpose of this work was to determine the manner of inheritance of serum alkaline phosphatase in the racing pigeon, (Columba livia). The evidence indicates that the electrophoretic patterns of serum alkaline phosphatase in the pigeon are inherited as codominant genes.
Contributing Partner: UNT Libraries
Parasites of the Cricket Frog, Acris Crepitans, of Denton County, Texas

Parasites of the Cricket Frog, Acris Crepitans, of Denton County, Texas

Date: August 1968
Creator: Block, Edward F.
Description: The purpose of this study was threefold. The literature concerning parasites of A. crepitans was to be brought up to date. Contributions to the general body of knowledge pertaining to the parasitic fauna of host specimens of A. crepitans and specifically those found in Denton County, Texas, were to be made. Finally, specimens found parasitizing host specimens of A. crepitans were to be preserved and classified.
Contributing Partner: UNT Libraries
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