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  Partner: UNT Libraries
 Degree Discipline: Biology
Factors Affecting Pigment Production in Mycobacterium rhodocrous

Factors Affecting Pigment Production in Mycobacterium rhodocrous

Date: June 1970
Creator: Chamberlain, Charlene
Description: This study was undertaken in order to isolate and identify the pigment, if possible, and to determine the effect of substrate, substrate concentration, light exposure, and pH on pigment production in this organism.
Contributing Partner: UNT Libraries
Factors Affecting Slime Formation in a Spray Irrigation Waste Disposal System

Factors Affecting Slime Formation in a Spray Irrigation Waste Disposal System

Date: August 1970
Creator: Jorgensen, James H.
Description: It was the purpose of this investigation to determine (1) what organisms are associated with the formation of this slime layer, (2) if certain chemical factors in the environment either enhance or retard formation of the slime layer, (3) whether or not there are certain chemical factors which are detrimental to slime formation, yet not detrimental to purification, or that perhaps enhance purification, (4) whether or not there are chemical factors which enhance purification of the effluent without preventing slime formation, and (5) what effects the chemical treatments have on the microbial flora of the soil system.
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Factors Involved in Passive Transfer of Contact Hypersensitivity

Factors Involved in Passive Transfer of Contact Hypersensitivity

Date: August 1966
Creator: Ellis, Walter L.
Description: Delayed hypersensitivity can be conferred passively to normal animals. There exists a period when whole peritoneal exudate cells will passively confer delayed sensitivity, but a sonic extract from them will not; however, after a few more days, both whole cells and sonic extracts could transfer sensitivity. This investigation was undertaken to study the differences in cells collected at two different time intervals after initial sensitization of guinea pigs with 1-fluoro-2,4-dinitrobenzene.
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Factors Involved in the Antibiotic Sensitivity of Staphylococcus Aureus

Factors Involved in the Antibiotic Sensitivity of Staphylococcus Aureus

Date: June 1961
Creator: Rotter, Joan
Description: It was the purpose of the present investigation to determine if sensitivity to other antibiotics can likewise be affected by subjecting S. aureus to heparin contact. It is of special interest in this problem to determine whether heparin in some manner affects the combining process of penicillin with the cells of several strains of S. aureus.
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The Fecundity of the Bluegill (Lepomis Macrochirus) in Certain Small East Texas Reservoirs

The Fecundity of the Bluegill (Lepomis Macrochirus) in Certain Small East Texas Reservoirs

Date: 1949
Creator: Estes, Charles M.
Description: A study of reproduction and spawning habits of the bluegill in a particular lake must include adequate samples for each period of the year. This will make it possible to determine the number of eggs in each spawn and the frequency of spawning. The number of spawns and average egg production for various sized fish shows the pattern of activity and makes possible further basic research.
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Field and Laboratory Fish Tissue Accumulation of Carbamazepine and Amiodarone

Field and Laboratory Fish Tissue Accumulation of Carbamazepine and Amiodarone

Date: December 2013
Creator: García Martínez, Santos Noé
Description: The goals of this dissertation work were to assess the bioaccumulation potential of carbamazepine and amiodarone, two widely used ionizable pharmaceutical compounds that possess mid-range and high LogD values, respectively, and to evaluate alternative methods to assess chemical accumulation in bluntnose minnows, catfish, and tilapia. Results indicated that carbamazepine does not appreciably bioaccumulate in fish tissue with BCFk and BAF carbamazepine values < 10. Amiodarone, however, with a log D of 5.87 at pH 7.4, accumulated in fish tissues with kinetic BCF values <2,400. Collectively, the data suggest that full and abbreviated laboratory-derived BCFs, BCFMs derived from S9 loss-of-parent assays, as well as field BAF values are similar for each of the two drugs. In summary, the results from this dissertation indicated: 1) The reduced design BCF test is a good estimate for the traditional OECD 305 test. 2) In vitro S9 metabolism assays provide comparable BCF estimates to the OECD 305 test. 3) Metabolism may play a large role in the accumulation of drugs in fish. 4) Reduced BCF tests and in vitro assays are cost effective and can reduce vertebrate testing.
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Food, Feeding Selectivity, and Ecological Efficiencies of Fundulus notatus (Rafinesque) (Osteichthyes; Cyprinodontidae)

Food, Feeding Selectivity, and Ecological Efficiencies of Fundulus notatus (Rafinesque) (Osteichthyes; Cyprinodontidae)

Date: August 1970
Creator: Atmar, Gerald Legare
Description: This study was made to further define the trophic dynamics of Fundulus notatus by determining its ration composition under natural conditions, measuring feeding selectivity under various laboratory conditions of prey-species composition and availability, and determining the efficiencies with which F. notatus utilizes ingested chironomid larvae.
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Food Habit Analysis of the Two Species of Texas Crappie

Food Habit Analysis of the Two Species of Texas Crappie

Date: 1941
Creator: Mitchell Glenn C.
Description: This study is based upon information taken from stomach analysis of 302 black crappie and 561 white crappie; the following data will be presented: 1. Food of adults and fingerlings; 2. Diet variation in relation to food availability; 3. Seasonal variation of feeding habits; 4. Diet variation in relation to size of crappie. Collections were made from ten lakes located in North, East, Central, and South Texas.
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Food Habits and Dietary Overlap of Four Species of Rodents from the Mesquite Plains of Texas

Food Habits and Dietary Overlap of Four Species of Rodents from the Mesquite Plains of Texas

Date: May 1972
Creator: Alcoze, Thomas M.
Description: The coexistence of Dipodomys ordii and Perognathus hispidus with Peromyscus maniculatus and Reithrodontomys montanus was studied in a grassland association of central Texas. The food habits of these species were compared with information from habitat vegetation analysis in an effort to determine food selectivity and the amount and importance of niche overlap and competition among these rodents.
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Forensic DNA Extraction Strategies for PCR Analysis

Forensic DNA Extraction Strategies for PCR Analysis

Date: May 1998
Creator: Van Winkle, Carolyn
Description: There is a transition nationwide on the analysis of forensic evidentiary stains containing biological material from traditional serology to Polymerase Chain Reaction (PCR) methodologies. The increased sensitivity of PCR, the limited number of alleles at each locus, and the necessity of producing unambiguous data for entry into the FBI's Combined DNA Index System make this study of extraction procedures of utmost importance. A "single tube" extraction procedure for blood stains collected onto FTA™ paper and a modified differential nonorganic extraction method from spermatozoa containing mixed stains were analyzed and compared. The extraction success was evaluated by amplification and typing of the amplified fragment length polymorphism, D1S80. These modifications of the nonorganic method utilized gave an improved separation of the spermatozoa-containing mixed stains.
Contributing Partner: UNT Libraries