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The binary complexes comprising the molecules hydrogen fluoride, hydrogen chloride, water, hydrogen sulphide, ammonia, phosphine, methane and silane have been studied by ab initio molecular orbital theory thus generating a matrix of eight by eight molecular complexes. The structures, energetics and vibrational spectra of these molecular complexes, both homodimers and heterodimers, have been studied at the second order level of Møller-Plesset perturbation theory using the 6-31G** basis set, by means of the Gaussian 92 computer program. The self consistent field interaction energies have been further dissected into their various components according to the Morokuma scheme, using the Monstergauss computer program. An analysis of the computed interaction energies of the complexes has also been carried out. A complete normal mode analysis, identifying the normal modes of Vibration, has been carried out using the Vibra program. The infrared spectra of some of the associated species have also been determined experimentally by means of the matrix isolation technique using argon and nitrogen as matrix gases. The combined use of the theoretical and experimental approaches has enabled reliable vibrational assignments to be made, which have been used in determining the molecular structures of the aggregates formed on complexation. / Thesis (Ph.D.)-University of Natal, Durban, 1999.

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Uses of electrochemical systems in environmental control technology are described for the removal and separation of metals from solution and the destruction of dye molecules in effluents. A novel concentrator cell system for the removal of lead and cadmium from solution is developed. The operation of this system permits the pH-independent recovery of metals from solution by electrodeposition. The formation of complexes with suitable ligands is exploited to achieve the separation of metals by electrochemical methods. The separations of tin, lead and indium from each other, the separation of nickel from cobalt and the separation of copper and palladium from cobalt are used to illustrate the benefits of complex formation. A three-compartment electrodialysis cell for removal of nickel from cobalt exploiting the greater stability of the nickel-EDTA complex compared with the Co-EDTA complex is described. Efficient removal of nickel from cobalt can be achieved but there is a compromise between cobalt purity and the percentage of cobalt transferred to the catholyte chamber for recovery. The anodic oxidation of a number of dye molecules including methylene blue, acid blue 25, reactive blue 2 and reactive blue 15 in chloride solution has been studied. The anodic oxidation of methylene blue results in the formation of seven neutral and two charged intermediates. The main intermediate is identified by X-ray diffraction crystal structure determination and accurate mass spectrometry as the novel compound 4,6-dichloro-7-dimethylamino-3H-phenothiazin-3 -one, (C14HjoCI2N20S) formed by replacement of one of the diirnethylamino groups of methylene blue with oxygen accompanied by regiospecific chlorination of the carbocylic system. The mass spectra of other intermediates formed are interpreted in terms of this structure. An electroadsorption system combining adsorption and electrolytic processes to achieve the elimination of the chlorinated compounds that are formed during the electro-oxidation of methylene blue is also reported.

Erratum is pasted on back end paper. / Bibliography: leaves 231-268. / xv, 268 leaves : ill. (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis examines the expression of cell adhesion molecules on both endothelial cells (ECs) and circulating leukocytes, and investigates the role of these molecules in renal allograft rejection. The aims of the study are to establish an ovine model of renal allograft transplantation, to generate monoclonal antibodies (mAbs) against ovine endothelial cell adhesion molecules, to examine the efficacy of the mAbs in prolonging the survival of the sheep renal allografts and to study the kinetics of expression of cell adhesion molecules (CAMs) during cellular activation 'in vitro' and 'in vivo' during the onset of allograft rejection. / Thesis (Ph.D.)--University of Adelaide, Dept. of Medicine, 1996

Includes bibliographical references (leaves 281-318) / xxv, 318 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Characterises the antigen recognized by mAb UA009 and investigates whether it is an endothelial adhesion marker. The identification of a CD36-like molecule led to targeted histological studies on the expression of the molecule in specific tissues of interest. / Thesis (Ph.D.)--Adelaide University, Dept. of Microbiology and Immunology, 2001