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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Mechanism of electron transfer in double-stranded DNA and PNA-DNA hybrids, and the development of a fluorescence probe for DNA and RNA detection

Ly, Danith 12 1900 (has links)
No description available.
62

COMPREHENSIVE STUDY OF THE ELECTROCHEMICAL FORMATION OF THIN OXIDE LAYERS ON NICKEL AND THE ELECTROCHEMICAL REDUCTION OF MONOLAYER OXIDES ON PLATINUM

ALSABET, MOHAMMAD H 14 February 2011 (has links)
The anodic polarization of Ni electrode in 0.5 M aqueous KOH solution at various polarization potential (Ep), time (tp) and temperature (T) values leads to the formation of β-Ni(OH)2 films. The growth of the hydroxide layers are irreversible and cannot be reduced electrochemically to metallic Ni. The hydroxide layer becomes thicker at higher values of Ep and/or tp and/or T. The thickness of β-Ni(OH)2 hydroxide were determined using ex–situ XPS and depth–profile techniques. Application of the oxide growth theories to our data indicate that the development of the β-Ni(OH)2 layer follows inverse logarithmic growth kinetics. The driving force of the process is the strong electric field that is established across the oxide layer. The strength of electric field is in the range of 0.015 – 0.197 x 109 V m–1. The oxidation mechanism of the Ni(II) surface compound to Ni(III) is electrochemically irreversible and the process is treated according to Randles–Sevcik equation. A linear relation was determined between the peak current density (jp) and the square root of the potential scan rate (v1/2) for the entire range of Ep, tp and T. The diffusion coefficient (D) values calculated for anodic and cathodic processes are 8.1 ± 0.2 x 10–12 and 4.3 ± 0.2 x 10–12 cm2 s–1, respectively. The activation energy (Ea) values for the diffusion process are 23 ± 2 kJ mol–1 (anodic) and 26 ± 2 kJ mol–1 (cathodic). The D and Ea values calculated from chronoamperometry measurements are comparable with those calculated from jp vs. v1/2 plots. The electro–reduction of PtO electrochemically pre–formed on Pt electrode in 0.5 M aqueous H2SO4 solution was also investigated. A well–controlled reduction conditions (Er, tr and T) were applied to determine the amount of the reduced PtO oxide. The reduction of the PtO requires much less time once ca. 1 monolayer (ML) of the oxide has been removed (ca. 1 ML of PtO remains). As expected, the longer tr and/or lower Er values, the greater the amount of the reduced oxide and consequently the smaller the amount of the remaining PtO oxide. / Thesis (Ph.D, Chemistry) -- Queen's University, 2011-02-08 10:58:54.114
63

Chemistry, electrochemistry and electron transfer induced reactions of cobalt complexes with fluorinated ligands

Gunawardhana, Kihanduwage N. Gipson, Stephen L. January 2007 (has links)
Thesis (Ph.D.)--Baylor University, 2007. / In the abstract "CF3COCo(CO)3PPh3, CF3, Bu3SnH, CF3H, [Co(CO)4]-, [Co(CO)3(PPh3)]-, C2F4, C6F5Co(CO)3PPh3, C6F5, C6F5H, C6F5D, CF3COCo(CO)3PPh3, and Co-C(acyl)" are subscript. Includes bibliographical references (p. 205-213).
64

Oxidation and reduction of small molecules by tungsten and osmium compounds /

Crevier, Thomas J. January 1998 (has links)
Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (leaves [225]-233).
65

Examining the effects of plant diversity and community composition on reducing conditions in the soil of experimental wetlands

Rice, Constance Elizabeth, January 2009 (has links)
Thesis (M.S.)--Ohio State University, 2009. / Title from first page of PDF file. Includes vita. Includes bibliographical references (p. 98-101).
66

Activated carbon as a catalyst in oxidation-reduction reactions

Larsen, Elmer Conrad, January 1939 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1939. / Typescript. Includes abstract and vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
67

Substitution and redox reactions of some binuclear platinum (II) and platinum (III) complexes /

Lo, Chang-fan. January 1989 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1990.
68

The influence of mantle metasomatism on the oxidation state of the lithospheric mantle

Creighton, Steven. January 2009 (has links)
Thesis (Ph. D.)--University of Alberta, 2009. / Title from PDF file main screen (viewed on Oct. 16, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Geology, Department of Earth and Atmospheric Sciences, University of Alberta." Includes bibliographical references.
69

Redox behavior of magnetite in the environment moving towards a semiconductor model /

Gorski, Christopher Aaron. Scherer, Michelle M. January 2009 (has links)
Thesis supervisor: Michelle M. Scherer. Includes bibliographic references (p. 198-215).
70

The biogeochemical cycling of sulfur in two distinct redox regimes /

Formolo, Michael J., January 2004 (has links)
Thesis (Ph.D.)--University of Missouri-Columbia, 2004. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

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