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Filtering by: Creator Ray, R. D. Remove constraint Creator: Ray, R. D. File Format application/pdf Remove constraint File Format: application/pdf Resource Type Dissertation Remove constraint Resource Type: Dissertation

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  • Simultaneous beta/gamma digital spectroscopy

    Creator:
    Farsoni, Abdollah T.
    Abstract:
    A state-of-the-art radiation detection system for simultaneous spectroscopy of beta-particles and gamma-rays has been developed. The system utilizes a triplelayer phoswich detector and a customized Digital Pulse Processor (DPP) built in our laboratory. The DPP board was designed to digitally capture the analog signal pulses and, following several digital preprocessing...
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    Dissertation
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    gamma-ray energy spectra with minimum crosstalk. The spectrometer proved to be an effective tool for

  • A comparison of depression, stress and self-image between younger and older adolescent mothers

    Creator:
    Kitzrow, Martha Anne.
    Abstract:
    Adolescent pregnancy is a major social problem which results in negative psychological, medical, developmental, economic and educational consequences for both mother and child. A review of the literature examined psychological and sociocultural factors and negative consequences associated with adolescent pregnancy. There has been little research on age specific differences between...
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    Dissertation
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    people: The members of my committee, Bill Becker, Doug Derryberry, Reese House, Ray Lowe, and Carol

  • Understanding health care utilization : a theoretically-based analysis of the Ecuadorian health care system

    Creator:
    López-Cevallos, Daniel F.
    Abstract:
    One in four Ecuadorians do not have access to health services; while more than two-thirds have no health insurance and insufficient resources to pay for the health care services they might require. The following three studies examined utilization of health care services using Andersen’s Health Care Utilization Behavior Theory. Secondary...
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    Dissertation
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    financing of each institution is separate, adding to the complexity of the system (H. R. Waters, 1999

  • Studies towards the total synthesis of (-)-kendomycin

    Creator:
    Smits, Helmars
    Abstract:
    Studies towards the total synthesis of (−)-kendomycin (1), a bacterial metabolite with a unique molecular architecture and pronounced biological activity, are described. These studies resulted in the synthesis of advanced intermediate 208, containing all of the carbon atoms of 1. A Dötz annulation between alkyne 122 and novel chromium carbenoid...
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    Dissertation
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    :_____________________________________________________ James D. White Studies towards the total synthesis of (−)-kendomycin (1), a bacterial

  • Studies toward the total synthesis of alkaloids : nagelamide A and D, agelastatin D, dragmacidin A-C, salacin and almazoles

    Creator:
    Tonsiengsom, Sorasaree
    Abstract:
    Studies toward the total syntheses of highly potent cytotoxic alkaloids including the bromopyrrole alkaloids and indole alkaloids were conducted and are described. Studies carried out in the course of this dissertation consist of five total syntheses of natural products that include bromopyrrole alkaloids nagelamide A, D and agelastatin D as...
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    Dissertation
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    : R = Br agelastatin C 1.9 N NH NH N O O HO H H H H Br agelastatin D 1.10 A B C D HN N

  • Phylogeny of the "Chaoboriform" genera

    Creator:
    Ogawa, Joshua R.
    Abstract:
    The phantom midges (Diptera: Chaoboridae) are a relatively small fly family composed of 50 extant species in six genera. Larvae are of interest to limnologists and ecologists because of their tolerance to toxicants, predatory avoidance strategies, and the role chaoborids play in zooplankton community dynamics. Relative to mosquitoes, systematists have...
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    Dissertation
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    Joshua R Ogawa and Darlene D Judd Prepared for: ZooTaxa Magnolia Press

  • Studying fusion reactions for effect of PCN on heavy nucleus formation and for nuclear structure effects

    Creator:
    Naik, Radhika
    Abstract:
    The fusion reaction ²⁰⁸Pb (⁵⁰Ti, xn) ²⁵⁸⁻x Rf (x = 1-3) was studied to determine PCN (probability that the mononucleus system evolves to form a compound nucleus inside the fission saddle point) and to establish the value of Wsur (survival probability) for the given reaction experimentally. The fission excitation function...
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    Dissertation
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    Walter D. Loveland The fusion reaction 208Pb (50Ti, xn) 258-xRf (x = 1-3) was studied to determine

  • Age-related alterations in transcriptional regulation of hepatic glutathione synthesis : remediation by R-alpha-lipoic acid

    Creator:
    Shenvi, Swapna V.
    Abstract:
    Glutathione (GSH) is the predominant low molecular weight thiol antioxidant in liver tissue. GSH plays an important role in maintaining the intracellular thiol redox ratio as well as detoxification of electrophiles and xenobiotics. Aging leads to a significant decline (35%; P ≤ 0.05) in hepatocellular GSH levels. Using young (2-4...
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    Dissertation
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    Regulation of Hepatic Glutathione Synthesis: Remediation by R-Alpha-Lipoic Acid Abstract approved

  • Design of a 14-bit continuous-time Delta-Sigma A/D modulator with 2.5MHz signal bandwidth

    Creator:
    Li, Zhimin
    Abstract:
    In recent years, there has been growing interest in both industry and academia to use continuous-time (CT) Δ-Σ A/D converters for wideband wireless and wireline communication applications. So far no reported CT Δ-Σ A/D modulator achieves 14-bit or higher dynamic range (DR) with more than 2MHz signal bandwidth (equivalently 4MS/s)....
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    ................................................................27 4.2 Typical R-C integrator used in CT Δ-Σ A/D modulators...................................29

  • Structural studies of the antioxidant defense enzymes; copper, zinc superoxide dismutase and alkyl hydroperoxide reductase flavoprotein

    Creator:
    Roberts, Blaine R.
    Abstract:
    Oxygen derived radicals are involved in many aspects of life from aging and cell signaling to disease states as diverse as heart disease, diabetes, neurodegeneration and inflammation. Therefore, understanding the function of antioxidant defense proteins and the effects of oxygen derived radicals on protein function is essential to elucidate the...
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    Dissertation
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    . Tainer2*, Elizabeth D. Getzoff2, Dean A. Malencik1, Sonia R. Anderson, Valerie C. Bomben1, Kathrin R