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  Partner: UNT Libraries
 Degree Discipline: Biology
 Degree Level: Master's
 Collection: UNT Theses and Dissertations
Antibiotic Sensitivity of Bacteria Isolated from City Water Distribution Systems

Antibiotic Sensitivity of Bacteria Isolated from City Water Distribution Systems

Date: August 1958
Creator: Williams, Catherine
Description: This thesis studies antibiotic sensitivity of bacteria isolated from city water distribution systems.
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
The Application of Chlorine Dioxide to Tastes and Odors in Water Supplies

The Application of Chlorine Dioxide to Tastes and Odors in Water Supplies

Date: 1952
Creator: Hemphill, Louis
Description: This problem was undertaken to determine the potentialities of chlorine dioxide as an algaecide and as an agent for the removal of tastes and odors from fresh water.
Contributing Partner: UNT Libraries
Application of Fluorescent Antibody Methods for the Enumeration and Identification of Bacilus Cereus

Application of Fluorescent Antibody Methods for the Enumeration and Identification of Bacilus Cereus

Date: August 1969
Creator: Ferebee, Robert Newton
Description: This particular work is proposed as a test of the expedience of using the fluorescent-antibody technique as a method for enumeration and identification of certain strains of B. cereus that have been found to be effective in preventing taste and odor in water supplies resulting from certain Actinomycete blooms.
Contributing Partner: UNT Libraries
Applications of remote sensing and GIS to modeling fire for vegetative restoration in Northern Arizona

Applications of remote sensing and GIS to modeling fire for vegetative restoration in Northern Arizona

Date: August 2003
Creator: Hardison, Tanya
Description: An accurate fire model is a useful tool in predicting the behavior of a prescribed fire. Simulation of fire requires an extensive amount of data and can be accomplished best using GIS applications. This paper demonstrates integrative procedures of using of ArcGIS™, ERDAS Imagine™, GPS, and FARSITE© to predict prescribed fire behavior on the Kaibab-Paiute Reservation. ArcGIS was used to create a database incorporating all variables into a common spatial reference system and format for the FARSITE model. ArcGIS Spatial Analyst was then used to select optimal burn sites for simulation. Our predictions will be implemented in future interagency efforts towards vegetative restoration on the reservation.
Contributing Partner: UNT Libraries
The aquatic insect communities of Holbrook Creek and Cochetopa Creek in Colorado.

The aquatic insect communities of Holbrook Creek and Cochetopa Creek in Colorado.

Date: December 2003
Creator: Wallace, Mark Allen
Description: The first objective for this problem in lieu of thesis project was to gather, identify to the lowest practical taxonomic level and organize all available aquatic insects collected from high altitude Colorado aquatic systems during the summers of 1994, 1996, 1998, and 2002 for the University of North Texas Environmental Science Field Course (BIOL 5650). The curated collection will be housed in the Elm Fork Natural History Museum, located at the University of North Texas. The second objective was to provide a summary and discussion of the occurrence and distribution of the aquatic insects collected from Mt. Blanca in 1994, 1996, and 1998 and to create a taxa list of aquatic insects collected from Cochetopa Creek during the summer of 2002.
Contributing Partner: UNT Libraries
Aspartate transcarbamoylase of Aeromonas hydrophila

Aspartate transcarbamoylase of Aeromonas hydrophila

Date: December 2000
Creator: Higginbotham, Leah
Description: This study focused on the enzyme, aspartate transcarbamoylase (ATCase) from A. hydrophila, a Gram-negative bacterium found in fresh water. The molecular mass of the ATCase holoenzyme from A. hydrophila is 310 kDa. The enzyme is likely composed of 6 catalytic polypeptides of 34 kDa each and 6 regulatory polypeptides of 17 kDa each. The velocity-substrate curve for A. hydrophila ATCase is sigmoidal for both aspartate and carbamoylphosphate. The Km for aspartate was the highest to date for an enteric bacterium at 97.18 mM. The Km for carbamoylphosphate was 1.18 mM. When heated to 60 ºC, the specific activity of the enzyme dropped by more than 50 %. When heated to 100 ºC, the enzyme showed no activity. The enzyme's activity was inhibited by ATP, CTP or UTP.
Contributing Partner: UNT Libraries
Assimilation of Inorganic Nitrogen by Aquatic Actinomycetes

Assimilation of Inorganic Nitrogen by Aquatic Actinomycetes

Date: August 1962
Creator: Davis, Ernst M.
Description: It was the purpose of this investigation to present laboratory data concerning the assimilation of inorganic nitrogen by the aquatic actinomycetes. The strains of aquatic actinomycetes under consideration represented a cross section of those currently under culture at North Texas State University.
Contributing Partner: UNT Libraries
Assimilation of Organic Carbon by Aquatic Actinomycetes

Assimilation of Organic Carbon by Aquatic Actinomycetes

Date: August 1963
Creator: Shao, Yi-min
Description: There were two purposes of this investigation: the first was to develop a method for studying spore germination, hyphal growth and mycelial development of the aquatic actinomycetes under the microscope so that the life cycle of this organism could be continuously followed. The second purpose was to determine the rate of carbon utilization from various types of nutritional sources, and to correlate this with the colony development and spore formation.
Contributing Partner: UNT Libraries
Attenuation of Escherichia Coli Aspartate Transcarbamoylase Expressed in Pseudomonas Aeruginosa Mutant and Wild Type Strains

Attenuation of Escherichia Coli Aspartate Transcarbamoylase Expressed in Pseudomonas Aeruginosa Mutant and Wild Type Strains

Date: December 1994
Creator: Liu, Haiyan, 1966-
Description: No apparent repression of pyr gene expression in Pseudomonas aeruginosa is observed upon addition of exogenous pyrimidines to the growth medium. Upon introduction of the subcloned Escherichia coli pyrBI genes for aspartate transcarbamoylase (ATCase) into a P. aeruginosa pyrB mutant strain, repression was observed in response to exogenously fed pyrimidine compounds. The results proved that it is possible to bring about changes in pyrimidine nucleotide pool levels and changes in transcriptional regulation of gene expression as a result. Thus, the lack of regulatory control in P. aeruginosa pyr gene expression is not due to an inability to take up and incorporate pyrimidine compounds into metabolic pools, or to an inability of the RNA polymerase to respond to regulatory sequences in the DNA but is probably due to a lack of specific regulatory signals in the promoter of the genes themselves.
Contributing Partner: UNT Libraries