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171 Matching Results
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Identification of Streptomyces Species Using Fluorescent Antibody-Membrane Filter Techniques
It is the purpose of this investigation to modify existing methods in an attempt to provide a rapid identification of members of the genus Streptomyces.
Date:
August 1967
Creator:
Singleton, Jackson David
System:
The UNT Digital Library
The In Vitro Interaction of 3-Methylcholanthrene with Deoxyribonucleic Acid
The purpose of this thesis is to report the interaction of aromatic hydrocarbons with DNA and to attempt to determine the relative binding affinities. The effect of the hydrocarbons on the continuity of the DNA molecule has been studied also and discussed.
Date:
August 1967
Creator:
Chapel, J. Frederick
System:
The UNT Digital Library
Rectal Temperatures of the Cotton Rat, Sigmodon Hispidus (Rodentia : Cricetidae)
This investigation has been concerned with determining the extent to which a small mammal, the cotton rat, may become acclimated to environmental temperatures, and the influence acclimation has upon a population. The study was also designed to determine if acclimation effects on a population can be seen in individual rats.
Date:
August 1968
Creator:
Cleveland, Arthur G.
System:
The UNT Digital Library
Qualitative and Quantitative Chromatographic Determination of Muscle Myosin Production in Control and Chronically Accelerated Chick Embryos
The purpose of this investigation was to employ newly improved qualitative and quantitative chromatographic techniques to obtain purified myosin from 1 G and 3 G chick embryos and to determine if muscle myosin production either follows or precedes the unparallel bone growth during chronic acceleration as reported by several investigators.
Date:
August 1968
Creator:
Fletcher, C. T.
System:
The UNT Digital Library
The Effects of the Soil Conditioner, Superbio, Upon the Cellulose Decomposing Bacteria and the Crop Yield of a Soil
The purpose of this investigation was to determine if a commercial soil conditioner, Superbio, can improve crop yield, and if the "advertised" soil improvement might be due to an increase in the activity and numbers of aerobic cellulose decomposing bacteria following treatment.
Date:
August 1968
Creator:
Gunn, Bruce Alan
System:
The UNT Digital Library
Growth Inhibition of Chlorella Pyrenoidosa TX71105 by an Unknown Soil Bacillus
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.
Date:
August 1968
Creator:
Harrel, Steve K.
System:
The UNT Digital Library
Isolation and Identification of an Odor Compound Produced by a Selected Aquatic Actinomycete
The purpose of this study was to develop an efficient method for the concentration of specific volatile taste and odor compounds produced by a selected aquatic actinomycete. A second purpose was to isolate and identify the specific taste and odor compound present in the highest concentration.
Date:
August 1968
Creator:
Henley, Don E.
System:
The UNT Digital Library
Isolation and Partial Characterization of Carotenoid Pigments of Mycobacterium Rhodochrous
It was the purpose of this investigation to isolate and characterize the pigments of Mycobacterium rhodochrous by partition behavior, chromatographic data, and absorption spectra. In addition, it was the purpose to determine whether or not the type of pigments found in M. rhodochrous is typical of those found in other mycobacteria.
Date:
August 1971
Creator:
Jorgensen, Joyce A.
System:
The UNT Digital Library
Effects of X-Irradiation of Respiration in Frog Brain Tissue Slices Using the Oxygen Electrode Method
The effects of X-irradiation at dosages of 40 r, 80 r, 160 r, 240 r, 320 r, 400 r, 800 r, 4 Kr, 8 Kr, and 16 Kr on the oxygen uptake of frog brain (Rana pipiens) tissue slices were studied. A membrane-covered oxygen electrode method was used to measure the respiratory rate. Continuous recordings were made before, during, and following X-irradiation in all of the test experiments. X-irradiation was delivered from a G. E. beryllium window X-ray unit at 120 KVP, 5 ma with a 1/4 mm Al filter.
Date:
August 1971
Creator:
Lin, Chen-hsiung
System:
The UNT Digital Library
Some Physiological Characteristics of Vitreoscilla stercoraria
The purpose of this study was to elucidate some of the physiological characteristics of V. stercoraria with regard to oxygen requirements, growth, nutritional requirements, pH effects on growth and growth factors.
Date:
August 1970
Creator:
Mayfield, David Carol
System:
The UNT Digital Library
Studies of Odor-Producing Actinomycete Response to Selected Geosmin Concentrations
The purpose of this investigation was to explore how geosmin, an odorous compound produced by certain algae and actinomycetes, may affect the growth of a selected, odor producing actinomycete of the genus Streptomyces.
Date:
August 1971
Creator:
Camp, Frank A.
System:
The UNT Digital Library
Resistance of Some Soil Bacteria to Pentachlorophenol and Sodium Pentachlorophenate
The purpose of this study was to see if any soil bacteria were able to use pentachlorophenol or sodium pentachlorophenate either aerobically or anaerobically as a sole carbon source, to see if any soil bacteria could survive in high concentrations of sodium pentachlorophenate, to determine the maximum concentration of sodium pentachlorophenate which permitted the growth of some soil bacteria, to see the effects of varying concentrations of sodium pentachlorophenate on the growth curves of soil bacteria capable of growing in its presence, and to see if any soil bacteria could degrade sodium pentachlorophenate.
Date:
August 1970
Creator:
Ferguson, Patricia Kaspar
System:
The UNT Digital Library
An Ecological Study of the Pine Vole, Microtus Pinetorum, in Northeast Texas
This study dealt with the life history and population dynamics of the pine vole, Microtus pinetorum. In the past there has been a void of ecological material concerning this small mammal in the southwestern region of its range. From November, 1969, through February, 1970, a survey was conducted in Marion County and Harrison County, Texas, to determine the most suitable habitat for an ecological study of Microtus pinetorum. A study was then initiated in March, 1970, and continued through March, 1971, on an undisturbed marsh five miles south of Marshall, Harrison County, Texas.
Date:
August 1971
Creator:
Greer, Roy E.
System:
The UNT Digital Library
Endogenous Levels of Indole-3-Acetic Acid in Synchronously Grown Chlorella Pyrenoidosa
The purpose of this study was to determine the endogenous levels of indole-3-acetic acid throughout the life cycle of Chlorella pyrenoidosa, and to show a correlation between onset of cell division and IAA levels.
Date:
August 1971
Creator:
Grotbeck, Laurence Merritt
System:
The UNT Digital Library
Biological Indices of Stream Pollution
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 Health 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.
Date:
August 1952
Creator:
Russell, James C.
System:
The UNT Digital Library
Microbial Utilization of a Certain Hydrocarbon Insecticide
This problem includes, first, the isolation and identification of microorganisms which utilized the hydrocarbon insecticide as a sole source of carbon and energy; second, a determination of the effect on plants sprayed with the hydrocarbon medium as compared with the effect on plants sprayed with the hydrocarbon medium containing a good growth of hydrocarbon-utilizers; and third, a determination of the ability of laboratory stock cultures of organisms to utilize or remain alive in the hydrocarbon medium.
Date:
August 1951
Creator:
Dorman, Homer L.
System:
The UNT Digital Library
Morphological and Physiological Changes in Micrococcus Pyogenes Var. Aureus during Development of its Resistance to Terramycin
The problem in this investigation consists of, first, the procurement of several strains of Micrococcus pyogenes var. aureus; second, the comparison of the degree and rate of development of resistance of these organisms to terramycin; and, third, to study the morphological and physiological changes which occur during the development of resistance.
Date:
August 1959
Creator:
Watson, Gerald T.
System:
The UNT Digital Library
An Investigation of Selected Factors Related to the Professional Status of the Science Teachers in the Four-Year Accredited High Schools of Texas for the School Year 1952-1953
The purpose of this study is to gather information related to the professional status of the science teachers in the four-year accredited high schools of Texas for the school year 1952-1953. The principal concern of the study is "Who is teaching science?"
Date:
August 1953
Creator:
Whitehead, Oren W.
System:
The UNT Digital Library
Spring Food Habits of Corydalus Cornutus L. in the Brazos River, Texas
The objective of this study was to determine the kinds and numbers of food organisms consumed by Corydalus cornutus, and to investigate its periodicity of feeding during the spring months in the Brazos River, Palo Pinto County, Texas. A total of 468 larvae were collected at two-week intervals from February 29 to May 14, 1971. Larvae were taken at opportunity during three periods of the day, 6am.-12pm., 12pm.-6pm., and 6pm.-12am. A total of 23 different food items was observed in the 121 stomachs containing food. An expedient method of dissection of the digestive tract is included.
Date:
August 1971
Creator:
Friday, Gary P.
System:
The UNT Digital Library
The Effects of Heparin on the Development of Resistance to Antibiotics by Staphylococcus Aureus
Since heparin combines with some antibiotics to decrease the toxicity of the antibiotic to the patient, the purpose of this investigation is to determine whether it has any effect upon the development of resistance to antibiotics by Staphylococcus aureus.
Date:
August 1959
Creator:
Blanton, William George
System:
The UNT Digital Library
Some Relationships between Certain Aquatic Actinomycetes and Bacillus Cereus
The purpose of this investigation is to determine if there was a metabolic relationship between the actinomycetes and the gram positive, spore-forming becilli in surface waters, and, if such a relationship was evident, to relate the association to the disappearances of typical actinomycete tastes and odors from waters.
Date:
August 1963
Creator:
Hoehn, Robert Campbell
System:
The UNT Digital Library
Autoimmunity of Periodontitis
The purpose of this investigation is to determine if auto-antibodies are demonstrable in inflammatory periodontal disease using methods other than those of Novotny.
Date:
August 1963
Creator:
Miller, Katy Jo Coyle
System:
The UNT Digital Library
A Serological Study of the Aerobic Actinomycetes
The purpose of this work is to find an adequate immunizing procedure for aerobic actinomycetes and a suitable method of testing for antibodies produced. Some of the factors which influence the antigenicity of the organisms, and the demonstration of specific antibodies have been included.
Date:
August 1963
Creator:
Ferguson, James Kelton
System:
The UNT Digital Library
The Effect of Aging on the Respiratory Response of Rat Heart Tissue Slices to Metabolic Inhibitors
This investigation was undertaken to explore biochemical changes which may occur in heart tissue with age. In this connection, the cellular enzymes were of special interest.
Date:
August 1962
Creator:
Couch, Ernest F.
System:
The UNT Digital Library