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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.

Mössbauer-spektroskopische Untersuchungen ungeordneter oxidischer Festkörper

Menzel, Marcus. January 2004 (has links) (PDF)
Braunschweig, Techn. Universiẗat, Diss., 2004.

Chemischer Transport von Germanaten

Pfeifer, Andrea. January 2001 (has links) (PDF)
Hannover, Universiẗat, Diss., 2001.

Grain bridging in alumina : room and high temperature /

Kokaly, Matthew T. January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (leaves 107-118).

Chronic exposure to nitrous oxide this thesis is submitted in partial fulfillment ... oral surgery ... /

Millard, Robert I. January 1973 (has links)
Thesis (M.S.)--University of Michigan, 1973.

A dissertation on the chymical properties and exhilarating effects of nitrous oxide gas : and its application to pneumatick medicine ; submitted as an inaugural thesis for the degree of doctor of medicine /

Barton, William P. C. Barton, William P. C. Yarrow, H. C. January 1808 (has links)
Thesis (M.D.)--University of Pennsylvania, 1808. Includes bibliographical references. / With a half-title. "An inaugural dissertation for the degree of doctor of medicine; submitted to the examination of John M'Dowell, L.L.D. provost, the trustees and medical professors of the University of Pennsylvania, on the twenty-seventh day of April, 1808."--p. [v]. Film 633 reel 6 is part of Research Publications Early American Medical Imprints collection (RP reel 6, no. 144). DNLM Includes bibliographical references.

Computational study of the structural phase transitions and pressure dependent electronic structure of ZnO

Molepo, Mahlaga Phineas 12 September 2012 (has links)
We use rst-principles calculations based on density functional theory to study the structural properties and pressure-induced solid-solid phase transitions of ZnO. Both the local-density approximation (LDA) and the PBE96 form of the generalized gradi- ent approximation (GGA) are employed together with the projector augmented wave (PAW) method to mimic the electron-ion interaction. The electronic structure is investigated by the HSE hybrid functional and a partially self-consistent GWapprox- imation. We consider the wurtzite (B4), rocksalt (B1), zinc blende (B3), CsCl (B2), PbO (B10), NaTl (B32), WC (Bh), BN (Bk), NiAs (B81) and AsTi (Bi) modi cations of ZnO. The calculated structural properties in the B4, B3, B1 and B2 phases compare acceptably well with those found in previous theoretical studies, as is the transition pressure between them. We nd that the B4 phase is the most preferred low-pressure candidate in ZnO while the B2 phase is favorable at high pressures. Apart from the previously reported B4!B1!B2 phase transition, our study reveals other possible paths for a transition from B4 to B2 phase with the Bk, Bh, B10, and B81 structures as intermediate phases. It is found that the HSE and the GW approach o¤er a signif- icant improvement to the prediction of band-gaps in ZnO. The band-gaps are found to increase with increasing pressure leading to the structural phase transitions.

The chemistry of allene oxides /

Ong, Beng Soon January 1976 (has links)
No description available.

Studies on the marine chemistry of nitrous oxide

Cohen, Yuval 12 January 1978 (has links)
Graduation date: 1978

The chemistry of allene oxides /

Ong, Beng Soon January 1976 (has links)
No description available.

Electrochromic properties of nickel oxide in different electrolytes

Stenman, Anders January 2013 (has links)
A half cell of an electrochromic (EC) device has been used to determine theelectrochromic response of a nickel oxide film in nine different electrolytes. Six of thenine electrolytes were 0.1 M non-aqueous salts dissolved in equal weight % ofpropylene carbonate and ethylene carbonate. Three of them were lithium-based andthree of them tetrabutylammonium (TBA)-based. The last three electrolytes wereproton-based aqueous solutions of 1 M KOH, 0.1 M propionic acid and 0.1 Mphosphoric acid, respectively. The electrolytes were subjected to electrochemical measurements of cyclicvoltammetry and square wave voltammetry, both with simultaneous in-situ opticaltransmittance measurements in the visible region. Ex-situ optical measurements wereperformed in the UV-VIS-NIR (300-2500 nm) range and IR-spectroscopymeasurements in the 600 – 4000 cm-1range.To determine the performance of the nickel oxide films, the coloration efficiency (CE)is used as a figure of merit. The desired value is to achieve a high optical modulationwith as little amount of charge inserted/extracted as possible.The results show that neither lithium nor TBA has a significant impact on theelectrochromic (EC) response, compared with the protonic electrolytes. Anargument can be made that the intercalation of neither cation (lithium or TBA) is thereason behind the electrochromic behaviour of the nickel oxide. In KOH it is ratherthe OH- that transfer to the surface and attracts protons (H+) from the bulk nickeloxide that enhances the EC response. In both propionic and phosphoric acid, it is thereversible intercalation of protons (H+) into the porous nickel oxide that gives theelectrochromic response.

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