UNT Theses and Dissertations - 379 Matching Results

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A Study of a Selected Group of Science Related Characteristics of Non-Science Majors

Description: The purpose of this study is to gather information related to the characteristics of two groups of undergraduate non-science majors; namely, those students who once considered science as a career and subsequently changed to a non-science major and those who have never considered a career in science. It is frequently observed that children in the elementary school have an intense interest in science. One of the principal concerns of this study is how and for what reasons has the interest in scie… more
Date: August 1957
Creator: Bearden, Bennie Paul
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A Study of Aryl Hydrocarbon Hydroxylase in Cultured Human Lymphocytes

Description: Aryl hydrocarbon hydroxylase activity was studied in cultured human lymphocytes using 3-methylcholanthrene, 1,2- benzanthracene, and 4'-bromoflavone as inducers. The substrates used to run the 60 minute assay were benzo(α)pyrene and diphenyloxazole. At the optimum bromoflavone concentration for induction of aryl hydrocarbon hydroxylase, the induced enzymatic activity compared favorably with that of aryl hydrocarbon hydroxylase induced by 3MC in a 96 hour lymphocyte culture using BP as the assay… more
Date: August 1976
Creator: Guyden, Jerry C.
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A Study of Hereditary Predisposition to Cardiovascular Diseases

Description: Because the many physicians and students of heredity have not been closely associated in finding that the causes of cardiovascular diseases might lie, in a large measure, to an inherited predisposition, this study has been undertaken; first, to contribute to several more case studies of cardiovascular diseases to the knowledge of heredity; second, to find if there is a possible successive occurrence of cardiovascular diseases in generation after generation; and third, to determine a possible mo… more
Date: 1949
Creator: McCarty, Juanita Mavis
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A Study of Malate Dehydrogenase Isoenzymes in the Midge Larva Glyptotendipes barbipes

Description: Two isoenzymes of malate dehydrogenase were isolated and partially purified from the midge larva Glyptotendipes barbipes. Differential centrifugation followed by cellulose acetate and polyacrylamide gel electrophoresis revealed one isoenzyme associated with the mitochondrial fraction and another form found only in the cytoplasm.
Date: May 1972
Creator: Jones, Vicki E.
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A Study of Plankton Dilution in Source Streams Compared with that of Lake Dallas Proper

Description: This study was a comparative study of Plankton of Lake Dallas and the three main source streams. Based on the analysis of data, which was presented relative to the organisms taken from the lake and from the source streams, the results obtained are discussed, the Plankton seem to be largely autogenetic in Lake Dallas, the source streams Elm Fork and Clear Creek form a dilution process.
Date: August 1936
Creator: Evans, Archibald A.
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A Study of Selected Factors Related to Permanency in Science Teaching

Description: The purpose of this study is to gather information related to some factors which are considered to be characteristic of science teaching; to attempt to identify some elements of permanency in science teaching; and to analyze some relationships between the results of the above two criteria with the view of establishing some factors which may be useful as predictors of permanency, or indicative of patterns of permanency, in science teaching.
Date: August 1958
Creator: Lovelace, Allen J.
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A Study of Some Congenital Anomalies of the Teeth

Description: Anomalies of the teeth include a variety of expression such as: anodontia, hyperdontia, peg teeth. opalescent dentine, mottled enamel, and other imperfections of the teeth. This paper is concerned primarily with anodontia in human subjects, although other abnormalities of interest are mentioned. Insufficient datum is the principal difficulty encountered in determining the mechanism and means of transmission in human genetics. Small families, slow breeding, and inability to subject humans to exp… more
Date: August 1955
Creator: Jones, Alvin Watt
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A Study of the Bacterial Flora of Food Utensils in Hardin College Cafeteria and Twenty-Five Eating Establishments in Wichita Falls, Texas

Description: The problem of this thesis consists primarily of a bacteriological survey of the eating utensils of Hardin College Cafeteria and twenty-five other eating establishments in the city of Wichita Falls, Texas. This investigation was made primarily with reference to a determination of the possible presence of typhoid and related organisms, and secondarily to an investigation of the actual presence of those bacterial organisms associated with the more common outbreaks of food poisoning.
Date: 1949
Creator: Adams, Isaac Newton
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A Study of the Phytoplankton Population of Lake Dallas

Description: The limnological investigation of any body of water is undertaken in order to secure more accurate information concerning the factors which play an important role in fish production or sanitation. This study shows the qualitative and quantitative planktonic algae in Lake Dallas, for the year 1937-38.
Date: June 1938
Creator: Bagwell, Russell L.
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A Study of the Role of Complement in the Protection of Akr Mice Against Transplanted Lymphoid Leukemia

Description: It seemed desirable to investigate further the possible role of complement and its components in the protective action of serum against transplanted neoplasms. It is the purpose of this thesis to present data which suggest that the C'4 component plays an active part in this process though the mechanism is not disclosed.
Date: 1957
Creator: Schlagenhauf, George Kenneth
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The Synecology of Phyco-Periphyton in Oligotrophic Lakes

Description: This study is designed to (a) demonstrate the highly productive nature of the littoral area as compared to the pelagic region, (b) the possible importance of phyco-periphyton in the diets of fish, (c) the effects of meteorological conditions on distribution of phytoplankton, and (d) a demonstration of the invalidity of using artificial substrates as a universal means of measuring productivity.
Date: May 1964
Creator: Foerster, John W.
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Taxonomic Analysis of Marine Actinomycetic Isolates

Description: Though this current study was initiated independently and was not a test laboratory for the taxonomic sub-committee's evaluative program, the problem outlined in this treatise was also designed in an effort to test certain characteristics of the actinomycetes of both a biochemical and morphological nature. This problem employed methods that might absolve or establish certain criteria for taxonomic use in the group of actinomycetes.
Date: August 1959
Creator: Haesly, Doran John
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The Taxonomic Significance of the Foliar Epidermal Hairs of Several Families of Dicotyledons

Description: The present investigation deals with the study of non-glandular epidermal hairs from the leaves of two hundred representative dicotyledons of forty-eight families in the Central North Texas area. Special attention has been given to the Compositae and Leguminosae in an effort to find a possible correlation between epidermal hair morphology and the taxonomic position of the plants concerned.
Date: 1945
Creator: McCarty, Faye A.
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A Technique for the Mass Culture of Aquatic Actinomycetes

Description: The purpose of the problem was to develop a laboratory technique for mass culturing of the aquatic actinomycetes. In order to solve the problem, it was necessary to devise a suitable culture chamber that would nurture the various species in both primary and secondary stages. It was also important to provide an adequate medium for growth of these organisms. Finally, the construction of the culture chambers must provide for a continuous exhaust of the taste and odor compounds so that the producti… more
Date: 1957
Creator: Norman, Mary Beth
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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