Synthesis, characterization and antibacterial studies of metal complexes of substituted thiourea
- Authors: Zulu, Happy Nonkululeko
- Date: 2012-03
- Subjects: Complex compounds , Halides , Ligands
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/24327 , vital:62636
- Description: Eighteen complexes Co(II), Cu(II), Zn(II), and Fe(III) with phenylthiourea, diethylthiourea, disopropylthiourea and dimethylthiourea were synthesized and characterized by elemental analysis, UV-Vis, FTIR, conductivity measurements. The complexes were formulated as either four coordinate for the metal(II) or six coordinate for Fe(III). The proposed formulations are consistent with the spectroscopic data for the complexes. The single crystal X-ray structure of the Zn(II) complex of phenylthiourea, Co(II) complex of diethylthiourea and Zn(II) complex of diisopropylthiourea are also reported. The X-ray crystal structures for these complexes revealed distorted tetrahedral geometry around the metal ions showed that the metal ions are coordinated to two molecules of the substituted thiourea through the sulphur atom and two either acetates or chlorides ions complete the four-coordinate geometry. The in vitro antibacterial activity of the complexes was studied against six bacterial strains using disc diffusion and broth micro-dilution methods. The complexes showed selective antibacterial activity. , Thesis (MSc) -- Faculty of Science and Agriculture, 2012
- Full Text:
- Date Issued: 2012-03
- Authors: Zulu, Happy Nonkululeko
- Date: 2012-03
- Subjects: Complex compounds , Halides , Ligands
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/24327 , vital:62636
- Description: Eighteen complexes Co(II), Cu(II), Zn(II), and Fe(III) with phenylthiourea, diethylthiourea, disopropylthiourea and dimethylthiourea were synthesized and characterized by elemental analysis, UV-Vis, FTIR, conductivity measurements. The complexes were formulated as either four coordinate for the metal(II) or six coordinate for Fe(III). The proposed formulations are consistent with the spectroscopic data for the complexes. The single crystal X-ray structure of the Zn(II) complex of phenylthiourea, Co(II) complex of diethylthiourea and Zn(II) complex of diisopropylthiourea are also reported. The X-ray crystal structures for these complexes revealed distorted tetrahedral geometry around the metal ions showed that the metal ions are coordinated to two molecules of the substituted thiourea through the sulphur atom and two either acetates or chlorides ions complete the four-coordinate geometry. The in vitro antibacterial activity of the complexes was studied against six bacterial strains using disc diffusion and broth micro-dilution methods. The complexes showed selective antibacterial activity. , Thesis (MSc) -- Faculty of Science and Agriculture, 2012
- Full Text:
- Date Issued: 2012-03
The relationship between exports and economic growth: an empirical case study of the South African automobile industry
- Authors: Taylor, Nina-Mari
- Date: 2012-03
- Subjects: Exports , Automobile industry and trade -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26313 , vital:65237
- Description: The dissertation investigates the relationship between automobile exports and economic growth in South Africa. Given the amount of investment and government assistance that has gone into assisting and developing the South African automobile industry via the Motor Industry Development Programme, this study examines whether the increase in automobile exports has impacted on economic growth. A demand-side model of the Export-Led Growth hypothesis is estimated in order to analyse the magnitude of the impact of automobile exports on growth. The results of the VECM and Dynamic Granger Causality test reveal that vehicle exports have a long-run positive impact on economic growth and that a uni-directional causal relationship is found to run from vehicle exports to economic growth. Even though vehicle exports are found to have a relatively significant impact on economic growth, domestic demand factors are concluded as being the key contributor of economic growth in South Africa. , Thesis (MCom) -- Faculty of Management and Commerce, 2012
- Full Text:
- Date Issued: 2012-03
- Authors: Taylor, Nina-Mari
- Date: 2012-03
- Subjects: Exports , Automobile industry and trade -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26313 , vital:65237
- Description: The dissertation investigates the relationship between automobile exports and economic growth in South Africa. Given the amount of investment and government assistance that has gone into assisting and developing the South African automobile industry via the Motor Industry Development Programme, this study examines whether the increase in automobile exports has impacted on economic growth. A demand-side model of the Export-Led Growth hypothesis is estimated in order to analyse the magnitude of the impact of automobile exports on growth. The results of the VECM and Dynamic Granger Causality test reveal that vehicle exports have a long-run positive impact on economic growth and that a uni-directional causal relationship is found to run from vehicle exports to economic growth. Even though vehicle exports are found to have a relatively significant impact on economic growth, domestic demand factors are concluded as being the key contributor of economic growth in South Africa. , Thesis (MCom) -- Faculty of Management and Commerce, 2012
- Full Text:
- Date Issued: 2012-03
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