• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 127
  • 56
  • 16
  • 12
  • 8
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • Tagged with
  • 274
  • 61
  • 45
  • 35
  • 33
  • 30
  • 29
  • 23
  • 23
  • 22
  • 20
  • 19
  • 19
  • 19
  • 18
  • 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.
41

Electrochemical polishing of diamond-turned nickel mirrors

Johnson, Kris William January 1981 (has links)
No description available.
42

Direct cobalt recovery from loaded KELEX 100 by reaction with hydrogen

Stubina, Nathan M. January 1982 (has links)
No description available.
43

An electrochemical approach to selective oligosaccharide synthesis

France, Robert January 2004 (has links)
This thesis describes investigations into the use of electrochemical oxidation as a method for the activation of glycosyl donors, and in particular the application of this technique to the selective activation of one electrochemically active glycoside over another. The synthesis of twenty eight electrochemically active monosaccharide donors, including thio-, seleno- and O-glycosides with varying protecting group patterns and anomeric substituents is described, together with the synthesis of three electrochemically active monosaccharides with the potential to act as both glycosyl donors and glycosyl acceptors. The electrochemical analysis of these monosaccharides is reported and gives a detailed insight into the effect of various factors on the oxidation potentials of the monosaccharide donors and allows some general conclusions to be drawn. In addition the analysis of six monosaccharides by cyclic voltammetry at scan rates of up to 25 000 Vs<sup>-1</sup> allows their homogenous kinetics to be outrun and formal oxidation potentials obtained. Investigations into selective electrochemical glycosylations are reported, and the applicability of the analytical electrochemical studies to synthetic electrochemical reactions is demonstrated. Selective glycosylations are possible with selenoglycoside donors and either thio- or O-glycoside acceptors to give disaccharides. However the selective activation of selenoglycosides over thioglycosides is shown to be complicated by some underlying pathway for indiscriminate activation of both donor and acceptor. In contrast the use of an O-glycoside donor experiences no such problems. More detailed work on the underlying problems experienced with the thioglycoside acceptor was conducted, and the results are reported here. Investigations into electrochemical activation of the disaccharides are discussed, and the thioglycoside is shown to be easily activated to give a trisaccharide. At the time of writing this is believed to be the only electrochemically mediated trisaccharide synthesis reported in the literature. The O-glycoside however is shown to be inactive under the electrochemical oxidation conditions employed.
44

Ammonia oxidation potential and microbial diversity in sediments from experimental bench-scale oxygen-activated nitrification wetlands

Allen, Jennifer. January 2009 (has links) (PDF)
Thesis (M.S. in civil engineering)--Washington State University, May 2009. / Title from PDF title page (viewed on July 15, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 21-31).
45

A reversible oxidation-reduction indicator of high potential, especially adapted to oxidimetric titrations ...

Chapman, Ray Parkin, January 1932 (has links)
Thesis (Ph. D.)--Columbia University, 1932. / Vita. Bibliography: p. 31.
46

The electrolytic reduction of tungstate and molybdate solutions in the presence of cobalt ions

McElwee, Rolland Francis, January 1950 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf [95]).
47

Thermal reduction of beryllium chloride with metallic magnesium

Strunk, Mailand Rainey. January 1947 (has links) (PDF)
Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1947. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed June 17, 2010) Includes bibliographical references (p. 32-33) and index (p. 35-36).
48

A reversible oxidation-reduction indicator of high potential, especially adapted to oxidimetric titrations ...

Chapman, Ray Parkin, January 1932 (has links)
Thesis (PH. D.)--Columbia university, 1932. / Vita. "References": p. 31.
49

Electrolytic reduction of nitro compounds in concentrated aqueous salt solutions

Gerapostolou, Basil George, January 1935 (has links)
Thesis (Ph. D.)--Columbia University, 1935. / Vita.
50

The effect of molecular conformation on the electrochemical reduction of some vicinal dibromides

O'Connell, Kathleen Marie. January 1982 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1982. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 217-223).

Page generated in 0.2587 seconds