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  Partner: UNT Libraries
 Department: Department of Biology
 Degree Discipline: Biology
 Collection: UNT Theses and Dissertations
Changes which Occur in Components C'3 and C'4 in Guinea Pig Complement after Injection of an Antigen

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
Chemical and Physiological Properties of an Antibiotic Produced by a Variant of the Penicillium Notatum-Chrysogenum Group

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
The Chemical Compounds Produced by Actinomycetes and Their Relation to Tastes and Odors in a Water Supply

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
Chronic Acceleration and Osteogenesis

Chronic Acceleration and Osteogenesis

Date: August 1973
Creator: Borgens, Richard Ben
Description: The effect of excess gravity on bone-forming elements of the growing perichondrial shaft of embryonic chicks was investigated through the use of the transmission electron microscope and various cytochemical techniques.
Contributing Partner: UNT Libraries
Colonial Variations of a Mucoid Strain of Staphylococcus Aureus

Colonial Variations of a Mucoid Strain of Staphylococcus Aureus

Date: June 1963
Creator: Liston, Winston Bryan
Description: It was the purpose of the present investigation to demonstrate the selection of a variant of one strain of Staphylococcus aureus by altering certain environmental factors, and to study that variant as to biochemical activities and capsule formation.
Contributing Partner: UNT Libraries
A Comparative Study of Egg Media in the Primary Isolation of Mycobacterium Tuberculosis

A Comparative Study of Egg Media in the Primary Isolation of Mycobacterium Tuberculosis

Date: 1949
Creator: Barberousse, Loris J.
Description: The primary purpose of this investigation is not only to improve the present technique of culture of Mycobacterium tuberculosis, but also to make a comparative study of the media use, namely, Veterans Administration modification of Trudeau's medium, Lowenstein's egg medium, and that developed by the author, in order to find which, if any, of these will most easily and effectively meet the needs of the hospital laboratory.
Contributing Partner: UNT Libraries
A Comparative Study of Four Genealogies to Determine Predisposition to Cancer

A Comparative Study of Four Genealogies to Determine Predisposition to Cancer

Date: 1941
Creator: Andrew, Vivian Wilson
Description: This study was made in an effort first, to determine the mode of transmission of the inheritance of a predisposition to cancer as revealed through the analyses of four separate human genealogies, and second, to make a comparative study of the genealogies to determine whether the mode of transmission is the same.
Contributing Partner: UNT Libraries
A Comparative Study of the D Cells of Certain Mammalian Islets of Langerhans

A Comparative Study of the D Cells of Certain Mammalian Islets of Langerhans

Date: August 1954
Creator: O'Brien, Larry Joe
Description: The purpose of this study is to describe and compare the D cells of the islets of Langerhans in six different species of mammals.
Contributing Partner: UNT Libraries
Comparative Ultrastructural Study between Young and Adult forms of Trypanosoma Lewisi

Comparative Ultrastructural Study between Young and Adult forms of Trypanosoma Lewisi

Date: August 1973
Creator: Abdul-Salam, Jasem M.
Description: The purpose of this study was to examine the ultrastructure of both young (dividing form) and adult (stationary form) of Trypanosoma lewisi. Changes observed between the two forms of the organism were related directly to data obtained from previous comparative biochemical studies conducted on these forms of Trypanosoma lewisi.
Contributing Partner: UNT Libraries
A Comparison of Predicted and Actual Trophic Status of Lake Ray Roberts, Texas Based on Chlorophyll A

A Comparison of Predicted and Actual Trophic Status of Lake Ray Roberts, Texas Based on Chlorophyll A

Date: May 1999
Creator: Lytle, Lili Lisa
Description: Two years before impoundment, the trophic status of Lake Ray Roberts was predicted by applying the total phosphorus input into the Organization for Economic Cooperation and Development (OECD) eutrophication model. Predicted mean summer epilimnetic (MSE) chlorophyll a of Elm Fork arm, Isle duBois arm and Main Body were in the eutrophic category of the OECD model. Observed MSE chlorophyll a two years after impoundment of Elm Fork arm, Isle duBois and Main Body had not reached their predicted means and were at the mesotrophic-eutrophic boundary of the OECD model. Six years after impoundment, observed MSE chlorophyll a for Main Body, was closer to its predicted mean and in the eutrophic category of the OECD model. Six years after impoundment, Elm Fork arm was the most productive area of Lake Ray Roberts. Observed means of chlorophyll a, total phosphates, suspended solids and turbidity were often highest in the Elm Fork arm. Wastewater effluent from Gainesville and Valley View, TX, had an impact on productivity in Elm Fork arm.
Contributing Partner: UNT Libraries
A Comparison of Specificity of Passive Transfer of Chemical Contact Hypersensitivity Following Different Methods of Sensitization

A Comparison of Specificity of Passive Transfer of Chemical Contact Hypersensitivity Following Different Methods of Sensitization

Date: June 1967
Creator: Foster, Terry L.
Description: This thesis compares the specificity of passive transfer of chemical contact hypersensitivity following various methods of sensitization.
Contributing Partner: UNT Libraries
A Comparison of the Carbon Dioxide and Oxygen Rate of Change Methods for Measuring Primary Productivity

A Comparison of the Carbon Dioxide and Oxygen Rate of Change Methods for Measuring Primary Productivity

Date: May 1969
Creator: Trotter, Dennis M.
Description: The purpose of this study was to demonstrate the variability of oxygen and carbon dioxide rate of change methods for measuring primary productivity and respiration in an aquatic environment.
Contributing Partner: UNT Libraries
Composition and Distribution of the Vegetation in Farm Pastures in Denton County, Texas

Composition and Distribution of the Vegetation in Farm Pastures in Denton County, Texas

Date: 1946
Creator: Parker, Robert S.
Description: This investigation has for its aim the determination and the evaluation of the vegetational composition in certain farm pastures in Denton County, Texas.
Contributing Partner: UNT Libraries
Correlation of C'4 and Antibody Response to Antigen-Adjuvant Injections

Correlation of C'4 and Antibody Response to Antigen-Adjuvant Injections

Date: June 1962
Creator: Foster, Billy G.
Description: This paper will attempt to determine whether the increased C'4 previously shown following antigen and adjuvant injection could be correlated to antibody increase following antigen injection.
Contributing Partner: UNT Libraries
A Correlation of the Vegetation with the Soil Types of Haskell County, Texas

A Correlation of the Vegetation with the Soil Types of Haskell County, Texas

Date: 1950
Creator: Tyson, Josiah William, Jr.
Description: The problem has consisted, first, of a mapping of the soil types present in Haskell County; second, a collection of the existing vegetation of each soil type; third, an identification of the vegetation collected and observed; fourth, and lastly, a comparative study of the vegetation of each soil type in an effort to establish a correlation between the vegetation and the soil type.
Contributing Partner: UNT Libraries
The Cultural, Physiological, Morphological and Chemical Characteristics of an Actinomycete from Lake Waco, Texas

The Cultural, Physiological, Morphological and Chemical Characteristics of an Actinomycete from Lake Waco, Texas

Date: January 1954
Creator: McCormick, William C.
Description: The purpose then of this paper has been to expand our knowledge of these aquatic forms by investigating the cultural, physiological, morphological, and chemical characteristics of an actinomycete isolated from the water supply, Lake Waco, of Waco, Texas.
Contributing Partner: UNT Libraries
Cytoplasmic Antigen Relationships among Streptomyces Species

Cytoplasmic Antigen Relationships among Streptomyces Species

Date: August 1966
Creator: Brunson, Kenneth W.
Description: The present study was concerned with the testing of antigenic material derived from a number of streptomycetes in an effort to establish an auxiliary taxonomic scheme based upon cytoplasmic antigen relationships among these organisms.
Contributing Partner: UNT Libraries
Degradation of Complex Carbon Compounds by Marine Actinomycetes

Degradation of Complex Carbon Compounds by Marine Actinomycetes

Date: August 1959
Creator: Willingham, Charles Allen
Description: The purpose of this paper is to present a comparative study of marine bacteria, molds and actinomycetes in regard to their ability to degrade certain pure and mixed complex compounds possibly occurring in the lagoon waste traps of the Texas Gulf Coast. This comparison was made using a differential oxygen uptake as the index of specific compound utilization.
Contributing Partner: UNT Libraries
Degradation of Hexadecanol by Certain Bacterial Species

Degradation of Hexadecanol by Certain Bacterial Species

Date: 1958
Creator: Hinckley, Nelda Jean Williams
Description: The purpose of this thesis is to determine the effect of hexadecanol on the populations of Pseudomonas and Alcaligenes species in reservoirs and determine their ability to utilize this compound as a carbon source.
Contributing Partner: UNT Libraries
Degradation of Homologous Polymerized Deoxyribonucleic Acid by Azotobacter Vinelandii ATCC 12837

Degradation of Homologous Polymerized Deoxyribonucleic Acid by Azotobacter Vinelandii ATCC 12837

Date: August 1972
Creator: Barnes, Wayne Riley
Description: The purpose of this study was twofold. The first was to isolate, purify, and characterize the deoxyribonucleic acid (DNA) of Azotobacter vinelandii ATCO 12837. The second was to determine if there was irreversible binding of homologous 32P labeled DNA to recipient A. vinelandii cells.
Contributing Partner: UNT Libraries
Density, Distribution, Production and Drift of Benthic Fauna in a Reservoir Receiving Thermal Discharges from a Steam Electric Generating Plant

Density, Distribution, Production and Drift of Benthic Fauna in a Reservoir Receiving Thermal Discharges from a Steam Electric Generating Plant

Date: December 1972
Creator: Durrett, Charles W.
Description: The effects of thermal discharges on the density, distribution, production, and drift of benthic organisms were studied at North Lake reservoir.
Contributing Partner: UNT Libraries
The Destruction of Enterobacteriaceae by the Sewage Plants of Decatur, Texas.

The Destruction of Enterobacteriaceae by the Sewage Plants of Decatur, Texas.

Date: 1949
Creator: Gettys, Charles T. (Charles Thomas), 1921-2007
Description: The nature of this problem divides itself into two parts, that is, a study of the old sewage plants in operation through the summer of 1947 and a study of the new plant put in operation during the fall of the same year.
Contributing Partner: UNT Libraries
Detection of Mercury Among Avian Trophic Levels at Caddo Lake and Lake Lewisville, TX

Detection of Mercury Among Avian Trophic Levels at Caddo Lake and Lake Lewisville, TX

Date: May 2012
Creator: Schulwitz, Sarah Elizabeth
Description: Mercury (Hg) is a globally distributed toxicant that has been shown to have negative effects on birds. in the United States, avian taxa have been shown to possess high Hg concentrations in the northeast, Great Lakes and Everglades ecosystems; however, few studies have measured avian Hg concentrations in other geographic regions. Previous studies have documented high Hg concentrations in multiple organisms in east Texas, but birds were not included in these studies. the main objective of the present study was to quantify Hg concentrations in birds in differing trophic levels at Caddo Lake and Lake Lewisville, TX. Results suggest that Hg concentrations may be high enough to negatively impact some bird taxa, particularly those at high trophic levels, residing at both Caddo Lake and Lake Lewisville.
Contributing Partner: UNT Libraries
A Determination of the Effects of Various Concentrations of Sodium Chloride upon the Growth of Three Species of Bacteria

A Determination of the Effects of Various Concentrations of Sodium Chloride upon the Growth of Three Species of Bacteria

Date: 1942
Creator: Davis, J. Floyd
Description: The problem in this investigation is to determine the effects of various concentrations of sodium chloride upon the growth of three species of bacteria. An effort has been made to solve this problem, not only by a study of the relevant literature, but also by laboratory research consisting of cultivation and observation of the three organisms which were arbitrarily chosen for this study.
Contributing Partner: UNT Libraries