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  Partner: UNT Libraries
 Degree Discipline: Biology
 Degree Level: Master's
 Collection: UNT Theses and Dissertations
Bentric Algae of Selected Thermal Springs of Yellowstone National Park

Bentric Algae of Selected Thermal Springs of Yellowstone National Park

Date: May 1964
Creator: Mann, James Edward
Description: The purpose of this investigation was to characterize the population dynamics of the benthos of selected pristine thermal springs.
Contributing Partner: UNT Libraries
Beta-adrenergic Blockade Via Atenolol and Its Effects on Blood Pressure, Heart Rate, and Renal Morphology in the Developing Chicken Gallus Gallus Domesticus

Beta-adrenergic Blockade Via Atenolol and Its Effects on Blood Pressure, Heart Rate, and Renal Morphology in the Developing Chicken Gallus Gallus Domesticus

Date: December 2012
Creator: Rossitto Lopez, Josie Jovita
Description: Chicken embryos were chronically exposed to the ?1- blocker atenolol during one of three stages: mesonephros (E7-E9), mesonephros-metanephros (E11-E13), or metanephros (E15-E17). Mesonephros group hearts were larger than all other groups (P < 0.01). Mesonephros and metanephros group kidneys were larger than all remaining groups (P < 0.0001). The mesonephros group nephron number was ~40% lower than control values (P = 0.002). Glomerular areas were 26% and 18% larger than the control group in the mesonephros and metanephros groups, respectively (P < 0.001). These data suggest an E7-E9 critical window of cardiovascular and renal development for atenolol. Acute atenolol exposure in E15 embryos showed an increase in mean arterial pressure with all but the highest dose. All doses significantly decreased heart rate.
Contributing Partner: UNT Libraries
A Bio-Chemical Comparative Study of the Plankton in Lake Dallas and Pecan Creek

A Bio-Chemical Comparative Study of the Plankton in Lake Dallas and Pecan Creek

Date: 1940
Creator: Brooks, Benjy Frances
Description: The purpose of this investigation is to compare the dissolved and suspended organic material in Lake Dallas to that coming into the lake through Pecan Creek.
Contributing Partner: UNT Libraries
Bioconcentration and Morphological Effects of Triclosan on Three Species of Wetland Plants

Bioconcentration and Morphological Effects of Triclosan on Three Species of Wetland Plants

Date: May 2013
Creator: Smith, Caleb M.
Description: Triclosan (TCS) is an antimicrobial compound found in several types of common household products. After being washed down the drain, TCS will then end up in the local watershed. Although numerous studies have been conducted to evaluate the fate and effects of TCS in aquatic environments, there have been no studies evaluating the role arbuscular mycorrhizal fungi (AM) play in a plants response to TCS exposure. Three species of wetland plants native North Texas were inoculated with AM spores and exposed to 0, 0.4 g/L and 4.0 g/L TCS concentrations. Root morphology of E. prostrata and S. herbacea showed AM and exposure responses. S. herbacea produced the greatest amounts biomass and TCS bioaccumulation, in all but one treatment. It also displayed opposing results to E. prostrata in measures of root length, root surface area, relative root mass, relative shoot mass and shoot:root ratio. TCS root tissue concentrations increased with increased exposures for both E. prostrata and S. herbacea. Even though E. prostrata had the lowest levels in each measure of biomass production, it had the highest amount of root TCS bioaccumulation in the AM inoculated 4.0 g/L treatment. H. laevis was between the other two species in terms of biomass ...
Contributing Partner: UNT Libraries
The Biological Elimination of Phenols in the Effluent of a Wood Preserving Plant

The Biological Elimination of Phenols in the Effluent of a Wood Preserving Plant

Date: August 1971
Creator: Rainey, John G.
Description: The removal of phenols from the waste waters of wood preserving plants has always presented problems. The purpose of this paper is to investigate the possibility of employing a biological system to reduce the phenol content of effluent from these plants.
Contributing Partner: UNT Libraries
Biological Indices of Stream Pollution

Biological Indices of Stream Pollution

Date: August 1952
Creator: Russell, James C.
Description: 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 Heal 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.
Contributing Partner: UNT Libraries
Biology and Energetics of Tropisternus Lateralis Nimbatus (SAY) (Coleoptera: Hydrophilidae) in a Playa on the Southern High Plains of Texas and Aquatic Coleoptera Diversity from Seven Playas on the Southern High Plains of Texas

Biology and Energetics of Tropisternus Lateralis Nimbatus (SAY) (Coleoptera: Hydrophilidae) in a Playa on the Southern High Plains of Texas and Aquatic Coleoptera Diversity from Seven Playas on the Southern High Plains of Texas

Date: December 1997
Creator: Cook, Robert E. (Robert Edward), 1969-
Description: A study of the biology of Tropisternus lateralis, a hydrophilid beetle, was conducted during the flood period of a single playa on the Southern High Plains of Texas from early June 1995 through early September 1995. Mechanism of colonization, tolerance/avoidance to drought, larval density, and secondary production were analyzed. T. lateralis colonized playas from surrounding aquatic habitats and avoided drought through aerial dispersion. Once in the playa, larval density increased over time. Secondary production was 1.31 g/m2/.25 yr. In addition, aquatic Coleoptera diversity was studied in seven playas on the Southern High Plains of Texas. A total of twenty three species were identified from the study region. Nine species not reported in playa literature were identified.
Contributing Partner: UNT Libraries
Callibaetis Floridanus (Ephemeroptera: Baetidae) Life History and Production in a West Texas Playa

Callibaetis Floridanus (Ephemeroptera: Baetidae) Life History and Production in a West Texas Playa

Date: May 1998
Creator: Anderson, Gregory (Gregory Mark)
Description: A life history study of Callibaetis floridanus was conducted over the wet cycle of a playa on the Southern High Plains of Texas from June through September 1995.
Contributing Partner: UNT Libraries
Capillary Permeability to Macromolecules at Normal and Hypobaric Pressure

Capillary Permeability to Macromolecules at Normal and Hypobaric Pressure

Date: August 1969
Creator: Parker, Paul E.
Description: The purpose of this investigation was to study the effects of decreased barometric pressure on the transcapillary movement of molecules by monitoring the macromolecular capillary permeability with lymph derived primarily from the hepatic and gastrointestinal regions of the dog.
Contributing Partner: UNT Libraries
Capillary Permeability to Narrow-Range Macromolecular Dextrans at Normal and Hypobaric Pressures

Capillary Permeability to Narrow-Range Macromolecular Dextrans at Normal and Hypobaric Pressures

Date: December 1972
Creator: Norris, John Anthony
Description: In view of its varied concepts and interpretations, and because of the discrepancies produced by the previous utilization of polydispersed dextrans, a study using extremely narrow-range molecular weight dextran fractions was initiated to reevaluate and consolidate some of the aspects of capillary permeability. A portion of the study was performed under decreased barometric pressure in order to clarify further some of the mechanisms involved in particulate transfer across the capillary endothelial membranes. Gel filtration procedures augmented the study as an assessment of the polydispersity effects of the dextrans employed.
Contributing Partner: UNT Libraries