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Department of Biology
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UNT Theses and Dissertations
Bacterial Survey of Representative Wells of Canyon, Texas, with Special Emphasis on Sanitation
Date: 1944
Creator: Barnes, Adele
Description: The problem of this thesis consists of a bacterial analysis of twenty-five representative wells within a radius of thirty miles of Canyon, Texas. An attempt has been made to determine the possible presence of the typhoid organism in these wells.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc75367/
Bacterial Survey of the Sources of Drinking Water of Trinidad, Texas, with Special Reference to Sanitation
Date: 1944
Creator: Coldwell, Lavenia Ruth
Description: A bacterial analysis of the water from thirty-six sources of consumption by the white population of Trinidad, Henderson County, Texas, was made to determine the potability of each of these in regard to infection from typhoid or related organisms.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc75382/
Bentric Algae of Selected Thermal Springs of Yellowstone National Park
Date: May 1964
Creator: Mann, James Edward
Description: The purpose of this investigation was to characterize the population dynamics of the benthos of selected pristine thermal springs.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc130511/
A Bio-Chemical Comparative Study of the Plankton in Lake Dallas and Pecan Creek
Date: 1940
Creator: Brooks, Benjy Frances
Description: The purpose of this investigation is to compare the dissolved and suspended organic material in Lake Dallas to that coming into the lake through Pecan Creek.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc75591/
Biological Indices of Stream Pollution
Date: August 1952
Creator: Russell, James C.
Description: A thorough biological survey and evaluation is a lengthy and expensive project. The number of technically trained persons required prevent its use by most public agencies. Since public health departments are the groups most frequently concerned with measuring the effects of pollution in streams, a need exists for a simplified method of sanitary survey. Recognizing this need, the Texas Heal Department assigned the writer the problem of devising a method of survey which would require a field party of two and could be conducted entirely from a mobile field laboratory.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc130298/
Changes which Occur in Components C'3 and C'4 in Guinea Pig Complement after Injection of an Antigen
Date: 1957
Creator: Hilton, Donald Long
Description: This thesis describes an experiment involving guinea pigs' blood and the changes that occurred in the serum with the injection of an antigen. The serum was analyzed in complement titration tests.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc107964/
Characterization of Moraxella bovis Aspartate Transcarbamoylase
Access: Use of this item is restricted to the UNT Community.
Date: December 2001
Creator: Hooshdaran, Sahar
Description: Aspartate transcarbamoylase (ATCase) catalyzes the first committed step in the pyrimidine biosynthetic pathway. Bacterial ATCases have been divided into three classes, class A, B, and C, based on their molecular weight, holoenzyme architecture, and enzyme kinetics. Moraxella bovis is a fastidious organism, the etiologic agent of infectious bovine keratoconjunctivitis (IBK). The M. bovis ATCase was purified and characterized for the first time. It is a class A enzyme with a molecular mass of 480 to 520 kDa. It has a pH optimum of 9.5 and is stable at high temperatures. The ATCase holoenzyme is inhibited by CTP > ATP > UTP. The Km for aspartate is 1.8 mM and the Vmax 1.04 µmol per min, where the Km for carbamoylphosphate is 1.05 mM and the Vmax 1.74 µmol per min.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc3012/
Characterization of the aspartate transcarbamoylase (ATC2) that is found in the pyrBC complex of Bordetella pertussis
Date: December 2001
Creator: Dill, Michael T
Description: An aspartate transcarbamoylase (ATCase) gene from Bordetella pertussis was amplified by PCR and ligated into pT-ADV for expression in Escherichia coli. This particular ATCase (pyrB) was an inactive gene found adjacent to an inactive dihydroorotase (DHOase) gene (pyrC'). This experiment was undertaken to determine whether this pyrB gene was capable of expression alone or if it was capable of expression only when cotransformed with a functional pyrC'. When transformed into E. coli TB2 pyrB-, the gene did not produce any ATCase activity. The gene was then co-transformed into E. coli TB2 pyrB- along with a plasmid containing the pyrC' gene from Pseudomonas aeruginosa and assayed for ATCase activity. Negative results were again recorded.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc3057/
Chemical and Physiological Properties of an Antibiotic Produced by a Variant of the Penicillium Notatum-Chrysogenum Group
Date: 1947
Creator: Conyers, Loyd, W.
Description: The present study of the production and properties of an antibiotic was undertaken in the hope that some useful information could be contributed to a long-range investigation program being carried on at North Texas State Teachers College. This program is concerned with the production of a useful antibiotic from a variant of the Penicillium notatum-chysogenum group of molds.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc70386/
The Chemical Compounds Produced by Actinomycetes and Their Relation to Tastes and Odors in a Water Supply
Date: 1951
Creator: Dill, Warren S.
Description: The purpose of this problem was to determine the cause of tastes and odors in the Breckenridge water supply and to isolate and culture the organisms responsible for the offensive chemicals.
Contributing Partner: UNT Libraries
Permallink:digital.library.unt.edu/ark:/67531/metadc97004/