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Stable Hydrogen And Carbon Isotopic Compositions Of Biogenic Methanes, Roger Allen Burke Jr.
Stable Hydrogen And Carbon Isotopic Compositions Of Biogenic Methanes, Roger Allen Burke Jr.
USF Tampa Graduate Theses and Dissertations
Stable hydrogen and carbon isotopic compositions of biogenic methanes collected from the sediments of several deep-sea, nearshore marine-estuarine, and freshwater environments were determined. The isotopic compositions of methane samples from eight different DSDP Sites (mean σD-CH4 = -1850>/∞, std. dev. = 70>/∞, n = 75; mean σ13C-CH4 = -71.30/∞, std. dev. = 6.30/∞, n = 44) are generally typical of methane formed via C02 reduction in deep-sea sediments.
Methane collected from several freshwater environments was D-depleted (mean σD-CH4 = -3000>/∞ , std. dev. = …
Geophysical And Hydrogeological Effects Of Astorm-Water Retention Pond On The Floridan Aquifer, Hillsborough County, Florida, Abdullah M. Alamri
Geophysical And Hydrogeological Effects Of Astorm-Water Retention Pond On The Floridan Aquifer, Hillsborough County, Florida, Abdullah M. Alamri
USF Tampa Graduate Theses and Dissertations
An integrated geologic, hydrologic, and geophysical investigation was conducted to determine the effect of a storm-water retention pond on the Floridan aquifer. Surface DC resistivity surveys were used to delineate the hydrostratigraphy. There are four distinct geoelectric layers: (1) Layer 1, high resistivity, 3 meters thick, fine to very fine unsaturated sand; (2) Layer 2, moderate resistivity, 1 to 2.5 meters thick, saturated sands and silts; (3) Layer 3, lower resistivity, 4 to 10 meters thick, silt and clay; (4) Layer 4, moderate resistivity, argillaceous limestone. Two fracture zones are defined by resistivity lows and marked by deep, V-shaped depressions …
Uptake Of Zn65 And Mn54 Into Body Tissues And Renal Granules By The Southern Quahog, Mercenaria Campechiensis, William Lynn Miller Jr.
Uptake Of Zn65 And Mn54 Into Body Tissues And Renal Granules By The Southern Quahog, Mercenaria Campechiensis, William Lynn Miller Jr.
USF Tampa Graduate Theses and Dissertations
A study was conducted to examine the influence of elevated inorganic phosphate and trace metal concentrations on the uptake and distribution of Zn65 and Mn54 into the body tissue and phosphoritic renal concretions of a subtropical estuarine bivalve, Mercenaria campechiensis. Chronological sampling of gills, mantle, adductor muscle, viscera, kidneys, and renal granules using gamma ray spectrometry allowed examination of both tissue distribution and accumulation patterns over time. The kidney was the principal site of Mn54 accumulation whereas Zn65 was concentrated in both the gill and the kidney. The gill initially accumulated zn65 three times faster …