• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 136
  • 17
  • 5
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 187
  • 187
  • 27
  • 14
  • 14
  • 13
  • 12
  • 11
  • 10
  • 9
  • 9
  • 9
  • 8
  • 8
  • 7
  • 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.
101

Electrochemical studies on the cementation of copper and cobalt with zinc /

Jiang, Xiong. January 1987 (has links)
Thesis (Ph. D.)--Murdoch University, 1987. / Submitted to the ChemistryProgramme, School of Mathematical and Physical Sciences, Murdoch University.
102

Studies on a novel type of electrogenerated chemiluminescence and electroanalysis of biomolecules at fluorosurfactant-modified electrodes

Chen, Zuofeng. January 2009 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2009. / Includes bibliographical references (leaves 195-212) Also available in print.
103

Exploratory synthesis and characterization of new multinary bismuth chalcogenides related by phase homologies

Kim, Jun Ho. January 2006 (has links)
Thesis (Ph. D.)--Michigan State University. Dept. of Chemistry, 2006. / Title from PDF t.p. (viewed on June 19, 2009) Includes bibliographical references. Also issued in print.
104

Dispersion minimization in capillary electrochromatography a Knox-Parcher study on packed capillaries /

Lowe, Preston C. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 1998. / Title from document title page. "November 1998." Document formatted into pages; contains ix, 43 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 42-43).
105

The electrolytic Precipitation of Copper from an alkaline cyanide Electrolyte

Flanigen, Anna Lockhart. January 1906 (has links)
Thesis ... of the University of Pennsylvania by Anna Lockhart Flanigen.
106

Approximate solutions to Fick's law boundary value problems in electroanalytical chemistry

Gelb, Robert I. January 1967 (has links)
Thesis (Ph. D.)--University of Wisconsin, 1967. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
107

I. The electrolysis of potassium chloride.

Lukens, Hiram Stanhope. January 1913 (has links)
Thesis (PH. D.)--University of Pennsylvania, 1913.
108

Surface Interactions of Mercury on Gold Foil Electrodes in Electrodeposition and Stripping and ; An Investigation of Free Thiolate Ions from Metal-Thiolate Chalcogenides

Watson, Charles Martin January 2003 (has links) (PDF)
No description available.
109

Electrochemical studies of gold bioaccumulation by yeast cell wall components

Lack, Barbara Anne January 1999 (has links)
Gold, amongst other group 11 metals, was almost certainly one of the first three metals known to man. In addition to the economic importance of the metal, gold has a wide variety of applications in the medical, electrocatalytical and micro-electronics fields. However, the determination of gold ions in solution, with accuracy, precision, sensitivity and selectivity is still an interesting and much debated topic in analytical chemistry. A system whereby gold ions have been successfully detected employing an electrochemical technique, known as stripping voltammetry, has been developed. The electrochemical method was chosen over other available techniques for the sensitivity, particularly at low concentrations, and selectivity properties; notably in the presence of other metal ions. Under acidic conditions, the electrochemical technique was applied and the presence of gold(III), at a concentration of 2.53 x 10⁻⁵ mol dm⁻³ in a mine waste water sample, was detected. Biomass, in particular yeast and algal types, have been successfully employed in extracting low concentrations of gold ions from industrial effluents. The manipulation of the biological facility for mineral interaction, biohydrometallurgy, may yield numerous potential new technologies. South Africa in particular would benefit from this area of research, since the country is a major ore and metal refining country and if the output and the efficiency of the mines could be improved, even by a small percentage, the financial rewards would be vast. In this study, the application of adsorptive cathodic stripping voltammetry (AdCSV) of gold(III) in the presence of various Saccharomyces cerevisiae cell wall components, was investigated to determine which, if any, were involved specifically in the chemical binding of the gold ions. The chitin and mannan extracts showed the most promise with detection limits of 1.10 x 10⁻⁶ mol dm⁻³ and 9 x 10⁻⁹ mol dm⁻³, respectively; employing the AdCSV technique. A modification of the stripping voltammetry technique, Osteryoung square wave stripping voltammetry (OSWSV), provided the lowest detection limit, for gold(IIl) in the presence of mannan, of 1.70 x 10⁻¹¹ mol dm⁻³ ; utilising a modified carbon paste electrode. The detection of gold(III) has been shown to be dependent on the type of electrode employed, the electrolyte solution and the presence of interfering agents. The effect of copper(II) and silver(I) on the detection of the gold(III) in solution was investigated; whilst the silver(I) has shown no detrimental effects on gold (III) detection systems, copper(II) has indicated the possibility of forming an inter-metallic compound with the gold(III). However, mannan has shown to selectively and preferentially bind the gold(III) in the presence of a ten-fold excess of copper(II). Nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy, as well as computer modelling techniques were employed to further investIgate the mannan-gold(III) interaction and proposed complex formed. The NMR, IR and computer modelling data are in agreement with the electrochemical data on proposing a mannan-gold(III) complex. The co-ordination site was established to be in the vicinity of the H-I and H-2 protons and the gold(III) adopts a square-planar geometry upon co-ordination. The benefits of the research are useful from a biological perspective (i. e. as more is known about the binding sites, microbiologists/biochemists may work on the optimisation of parameters for these sites or work could be furthered into the enhanced expression of the sites) and an industrial one. In addition to the' two major benefits, an improved understanding of gold and its chemistry would be achieved, which is advantageous for other fields of research as well.
110

Electroanalysis of amino acids and dithocarbamates

Wong, Wai Cheong 01 January 1994 (has links)
No description available.

Page generated in 0.103 seconds