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Characterization of the OCT Plasmid-Encoded Mercury Resistance Genetic Locus in Pseudomonas putida

Description: A 17.1 Kb genetic element encoding for mercury resistance (OCT-Hg^r) was shown to translocate from its original location on the OCT plasmid to the resistance plasmid, RPl, in Pseudomonas putida. Analysis of RPl-Hg^r recombinant plasmids revealed that insertion of mercury resistance genes into RPl could occur at a variety of sites, with all recombinants having common EcoRI restriction fragments of 9.4, 3.8, 2.3, and 1.6 Kb, derived from the insertion. Hybridization analysis suggested the existen… more
Date: May 1989
Creator: Armbruster, Steven C. (Steven Christopher)
Item Type: Refine your search to only Thesis or Dissertation
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Chemical and Physiological Properties of an Antibiotic Produced by a Variant of the Penicillium Notatum-Chrysogenum Group

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.
Date: 1947
Creator: Conyers, Loyd, W.
Item Type: Refine your search to only Thesis or Dissertation
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Circulatory and Respiratory Responses to Cycle Ergometry at Different Pedal Rates

Description: The effects of moderate workload exercise at different pedal rates on circulatory and respiratory parameters were studied. Five subjects performed seven discontinuous constant-load cycle ergometer tests of 30 minutes duration at pedal rates of 40, 50, 60, 70, 80, 90 and 100 rpm. Oxygen uptake and carbon dioxide production were determined by standard open circuit spirometry, while heart rate was recorded by electrocardiograph. The CO₂ rebreathing procedure was administered during the exercise bo… more
Date: May 1991
Creator: Hernandez, Raymundo
Item Type: Refine your search to only Thesis or Dissertation
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A Comparative Study of Egg Media in the Primary Isolation of Mycobacterium Tuberculosis

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.
Date: 1949
Creator: Barberousse, Loris J.
Item Type: Refine your search to only Thesis or Dissertation
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A Comparative Study of Four Genealogies to Determine Predisposition to Cancer

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.
Date: 1941
Creator: Andrew, Vivian Wilson
Item Type: Refine your search to only Thesis or Dissertation
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A Comparative Study of the Bottom Fauna of four Texas Lakes

Description: This thesis attempted to study the bottom productivity both qualitatively and quantitatively with reference to the distribution of bonthos. The study of the bottom fauna in large reservior lakes is a relatively new field. This work will give more information on an unknown field than previously existed, although its scope is not intend to be exhaustive.
Date: August 1938
Creator: Lamb, Leonard D.
Item Type: Refine your search to only Thesis or Dissertation
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Comparative Toxicity Responses in Earthworms Lumbricus Terrestris and Eisenia Foetida to Cadmium Nitrate and Chlordane Using Artificial Soil and Filter Paper Exposures

Description: This research compares LC50 and LD50 of earthworms, Lumbricus terrestris and Eisenia foetida exposed to cadmium nitrate and chlordane using 48-h contact filter paper (FP) and 14-d artificial soil (AS) protocols. Both LC50 and LD50 showed that chlordane was more toxic than cadmium in both species regardless of the exposure. The reference toxicant 2-chloroacetamide using the standardized 48-h FP exposure was used to assess the general response of the earthworm prior to toxicity experiments. A glu… more
Date: August 1992
Creator: Muratti Ortiz, Joseph F.
Item Type: Refine your search to only Thesis or Dissertation
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Comparative Ultrastructural Study between Young and Adult forms of Trypanosoma Lewisi

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.
Date: August 1973
Creator: Abdul-Salam, Jasem M.
Item Type: Refine your search to only Thesis or Dissertation
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A Comparison of Predicted and Actual Trophic Status of Lake Ray Roberts, Texas Based on Chlorophyll A

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 mean… more
Date: May 1999
Creator: Lytle, Lili Lisa
Item Type: Refine your search to only Thesis or Dissertation
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A Comparison of Thermogenesis by Selected Substrates on Hypothermic Rat Liver

Description: The thermogenic effects in hypothermia of four substrates--alanine, glycine, ethano, and pyruvate - were studied in seventeen experiments. Albino rats were decapitated, and their livers were removed. The livers were homogenized with phosphate buffer at -5° C. After equilibration in a refrigerated Warburg apparatus at 20° C, the substrates were added and tissue respiration was recorded over three hours. Heat production was calculated from O2 uptake and CO2 production. Results showed that alanine… more
Date: August 1979
Creator: Long, James T.
Item Type: Refine your search to only Thesis or Dissertation
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A Correlation of the Edaphic Factors with the Vegetation of the Woodbine Sands, Denton County, Texas

Description: The purpose of this study was to correlate the Vegetation of the Woodbine Sands with the edaphic factors. In the laboratory an analysis of the edephic factors was made of the twenty-two soil types collected from the three formations. The results of these and other analysis are shown in tables and graphs. The results indicate that the vegetational cover of an area that is uniform in its origin and in its resident soil factors is determined by the edaphic factors present.
Date: August 1936
Creator: Graham, H. L.
Item Type: Refine your search to only Thesis or Dissertation
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A Correlation of the Vegetation with the Soil Types of Haskell County, Texas

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.
Date: 1950
Creator: Tyson, Josiah William, Jr.
Item Type: Refine your search to only Thesis or Dissertation
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The Cultural, Physiological, Morphological and Chemical Characteristics of an Actinomycete from Lake Waco, Texas

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.
Date: January 1954
Creator: McCormick, William C.
Item Type: Refine your search to only Thesis or Dissertation
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Degradation of Complex Carbon Compounds by Marine Actinomycetes

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.
Date: August 1959
Creator: Willingham, Charles Allen
Item Type: Refine your search to only Thesis or Dissertation
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