A short composition portfolio
- Buitendag, Kingsley Alexander
- Authors: Buitendag, Kingsley Alexander
- Date: 2011
- Subjects: Music -- South Africa Composition (Music)
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: vital:2632 , http://hdl.handle.net/10962/d1002297
- Full Text:
- Date Issued: 2011
- Authors: Buitendag, Kingsley Alexander
- Date: 2011
- Subjects: Music -- South Africa Composition (Music)
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: vital:2632 , http://hdl.handle.net/10962/d1002297
- Full Text:
- Date Issued: 2011
Preparation and evaluation of Lignocellulose-Montmorillonite nanocomposites for the adsorption of some heavy metals and organic dyes from aqueous solution
- Authors: Bunhu, Tavengwa
- Date: 2011
- Subjects: Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Language: English
- Type: Thesis , Doctoral , PhD (Chemistry)
- Identifier: vital:11333 , http://hdl.handle.net/10353/535 , Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Description: The need to reduce the cost of adsorption technology has led scientists to explore the use of many low cost adsorbents especially those from renewable resources. Lignocellulose and montmorillonite clay have been identified as potentially low cost and efficient adsorbent materials for the removal of toxic heavy metals and organic substances from contaminated water. Montmorillonite clay has good adsorption properties and the potential for ion exchange. Lignocellulose possesses many hydroxyl, carbonyl and phenyl groups and therefore, both montmorillonite and lignocellulose are good candidates for the development of effective and low cost adsorbents in water treatment and purification. The aim of this study was to prepare composite materials based on lignocellulose and montmorillonite clay and subsequently evaluate their efficacy as adsorbents for heavy metal species and organic pollutants in aqueous solution. It was also important to assess the adsorption properties of the modified individual (uncombined) lignocellulose and montmorillonite. Lignocellulose and sodium-exchanged montmorillonite (NaMMT) clay were each separately modified with methyl methacrylate (MMA), methacrylic acid (MAA) and methacryloxypropyl trimethoxysilane (MPS) and used as adsorbents for the removal of heavy metals and dyes from aqueous solution. The lignocellulose and NaMMT were modified with MMA, MAA and MPS through free radical graft polymerisation and/or condensation reactions. NaMMT was also modified through Al-pillaring to give AlpMMT. The materials were characterised by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and small angle X-ray scattering (SAXS) and characterisation results showed that the modification of the montmorillonite with MAA, MMA and MPS was successful. The modified lignocellulose and montmorillonite materials were evaluated for the adsorption of heavy metal ions (Cd2+ and Pb2+) from aqueous solution by the batch method. The adsorption isotherms and kinetics of both Cd2+ and Pb2+ onto the NaMMT clay, AlpMMT and lignocellulose materials are presented. The Langmuir isotherm was found to be the best fit for the adsorption of both heavy metals onto all the adsorbents. AlpMMT showed very poor uptake for heavy metals (both Cd2+ and Pb2+). PMMAgMMT, PMAAgMMT, PMAAgLig and PMPSgLig showed improved adsorption for both heavy metals. The mechanism of heavy metal adsorption onto the adsorbents was best represented by the pseudo second-order kinetic model. PMPSgLig, NaMMT and AlpMMT showed relatively high adsorption capacities for methyl orange, while the adsorption of neutral red was comparable for almost all the adsorbents. Neither the Langmuir model nor the Freundlich model was found to v adequately describe the adsorption process of dyes onto all the adsorbents. The pseudo second-order model was found to be the best fit to describe the adsorption mechanism of both dyes onto all the adsorbents. The modification of lignocellulose and montmorillonite with suitable organic groups can potentially produce highly effective and efficient adsorbents for the removal of both heavy metals and dyes from contaminated water. Novel adsorbent composite materials based on lignocellulose and montmorillonite clay (NaMMT) were also prepared and evaluated for the removal of pollutants (dyes and heavy metals) from aqueous solution. The lignocellulose-montmorillonite composites were prepared by in situ intercalative polymerisation, using methyl methacrylate, methacrylic acid and methacryloxypropyl trimethoxysilane (MPS) as coupling agents. The composite materials were characterised by FTIR, TGA, TEM and SAXS. SAXS diffractograms showed intercalated nanocomposites of PMMAgLig-NaMMT and PMAAgLig-NaMMT, whereas PMPSgLig-NaMMT showed a phase-separated composite and the same results were confirmed by TEM. The lignocellulose-montmorillonite composites were assessed for their adsorption properties for heavy metal ions (Cd2+ and Pb2+) and dyes (methyl orange and neutral red) from aqueous solution. Among these composite materials, only PMAAgLig-NaMMT showed a marked increase in the uptake of both Cd2+ and Pb2+ relative to lignocellulose and montmorillonite when used independently. The adsorption data were fitted to the Langmuir and Freundlich isotherms, as well as to the pseudo first-order and pseudo second-order kinetic models. The data were best described by the Langmuir isotherm and the pseudo second-order kinetic model. On the adsorption of dyes, only PMPSgLig-NaMMT showed enhanced adsorption of methyl orange (MetO) compared with lignocellulose and montmorillonite separately. The enhanced adsorption was attributed to the synergistic adsorption due to the presence of MPS, lignocellulose and NaMMT. Competitive adsorption studies were carried out from binary mixtures of MetO and Cd2+ or Pb2+ in aqueous solution. The adsorption process of MetO onto the composite material was found to follow the Freundlich adsorption model, while the mechanism of adsorption followed both the pseudo first-order and pseudo second-order models. This particular composite can be used for the simultaneous adsorption of both heavy metals and organic dyes from contaminated water. The adsorption of neutral red to the composite materials was comparable and the pseudo second-order kinetic model best described the adsorption mechanism.
- Full Text:
- Date Issued: 2011
- Authors: Bunhu, Tavengwa
- Date: 2011
- Subjects: Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Language: English
- Type: Thesis , Doctoral , PhD (Chemistry)
- Identifier: vital:11333 , http://hdl.handle.net/10353/535 , Lignocellulose , Lignocellulose -- Biodegradation , Water -- Purification , Adsorption , Separation (Technology) , Dyes and dyeing , Montmorillonite
- Description: The need to reduce the cost of adsorption technology has led scientists to explore the use of many low cost adsorbents especially those from renewable resources. Lignocellulose and montmorillonite clay have been identified as potentially low cost and efficient adsorbent materials for the removal of toxic heavy metals and organic substances from contaminated water. Montmorillonite clay has good adsorption properties and the potential for ion exchange. Lignocellulose possesses many hydroxyl, carbonyl and phenyl groups and therefore, both montmorillonite and lignocellulose are good candidates for the development of effective and low cost adsorbents in water treatment and purification. The aim of this study was to prepare composite materials based on lignocellulose and montmorillonite clay and subsequently evaluate their efficacy as adsorbents for heavy metal species and organic pollutants in aqueous solution. It was also important to assess the adsorption properties of the modified individual (uncombined) lignocellulose and montmorillonite. Lignocellulose and sodium-exchanged montmorillonite (NaMMT) clay were each separately modified with methyl methacrylate (MMA), methacrylic acid (MAA) and methacryloxypropyl trimethoxysilane (MPS) and used as adsorbents for the removal of heavy metals and dyes from aqueous solution. The lignocellulose and NaMMT were modified with MMA, MAA and MPS through free radical graft polymerisation and/or condensation reactions. NaMMT was also modified through Al-pillaring to give AlpMMT. The materials were characterised by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and small angle X-ray scattering (SAXS) and characterisation results showed that the modification of the montmorillonite with MAA, MMA and MPS was successful. The modified lignocellulose and montmorillonite materials were evaluated for the adsorption of heavy metal ions (Cd2+ and Pb2+) from aqueous solution by the batch method. The adsorption isotherms and kinetics of both Cd2+ and Pb2+ onto the NaMMT clay, AlpMMT and lignocellulose materials are presented. The Langmuir isotherm was found to be the best fit for the adsorption of both heavy metals onto all the adsorbents. AlpMMT showed very poor uptake for heavy metals (both Cd2+ and Pb2+). PMMAgMMT, PMAAgMMT, PMAAgLig and PMPSgLig showed improved adsorption for both heavy metals. The mechanism of heavy metal adsorption onto the adsorbents was best represented by the pseudo second-order kinetic model. PMPSgLig, NaMMT and AlpMMT showed relatively high adsorption capacities for methyl orange, while the adsorption of neutral red was comparable for almost all the adsorbents. Neither the Langmuir model nor the Freundlich model was found to v adequately describe the adsorption process of dyes onto all the adsorbents. The pseudo second-order model was found to be the best fit to describe the adsorption mechanism of both dyes onto all the adsorbents. The modification of lignocellulose and montmorillonite with suitable organic groups can potentially produce highly effective and efficient adsorbents for the removal of both heavy metals and dyes from contaminated water. Novel adsorbent composite materials based on lignocellulose and montmorillonite clay (NaMMT) were also prepared and evaluated for the removal of pollutants (dyes and heavy metals) from aqueous solution. The lignocellulose-montmorillonite composites were prepared by in situ intercalative polymerisation, using methyl methacrylate, methacrylic acid and methacryloxypropyl trimethoxysilane (MPS) as coupling agents. The composite materials were characterised by FTIR, TGA, TEM and SAXS. SAXS diffractograms showed intercalated nanocomposites of PMMAgLig-NaMMT and PMAAgLig-NaMMT, whereas PMPSgLig-NaMMT showed a phase-separated composite and the same results were confirmed by TEM. The lignocellulose-montmorillonite composites were assessed for their adsorption properties for heavy metal ions (Cd2+ and Pb2+) and dyes (methyl orange and neutral red) from aqueous solution. Among these composite materials, only PMAAgLig-NaMMT showed a marked increase in the uptake of both Cd2+ and Pb2+ relative to lignocellulose and montmorillonite when used independently. The adsorption data were fitted to the Langmuir and Freundlich isotherms, as well as to the pseudo first-order and pseudo second-order kinetic models. The data were best described by the Langmuir isotherm and the pseudo second-order kinetic model. On the adsorption of dyes, only PMPSgLig-NaMMT showed enhanced adsorption of methyl orange (MetO) compared with lignocellulose and montmorillonite separately. The enhanced adsorption was attributed to the synergistic adsorption due to the presence of MPS, lignocellulose and NaMMT. Competitive adsorption studies were carried out from binary mixtures of MetO and Cd2+ or Pb2+ in aqueous solution. The adsorption process of MetO onto the composite material was found to follow the Freundlich adsorption model, while the mechanism of adsorption followed both the pseudo first-order and pseudo second-order models. This particular composite can be used for the simultaneous adsorption of both heavy metals and organic dyes from contaminated water. The adsorption of neutral red to the composite materials was comparable and the pseudo second-order kinetic model best described the adsorption mechanism.
- Full Text:
- Date Issued: 2011
Human figure drawings and the general mental development of South African children
- Authors: Burger, Reinhart
- Date: 2011
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9869 , http://hdl.handle.net/10948/d1008068
- Description: This quantitative exploratory-descriptive study investigated the value of human figure drawing (HFD) tests for developmental testing in the South African context. Due to their characteristics such tests may be particularly suitable to screen for developmental delays in the local South African context. The objectives of the research were to explore and describe the standardized HFD scores and Griffiths Mental Development Scales – Extended Revised (GMDS-ER) general quotients (GQ) of the sample; to investigate whether a relationship exists between the standardized HFD scores and GQs; and to investigate the strength and directionality of this relationship if it was found to exist in the sample. Relevant literature was discussed and an integration of key constructs was provided. The research sample consisted of 30 GMDS-ER protocols collected at a University Psychology Clinic in the Nelson Mandela metropol, Eastern Cape, South Africa. The HFDs of the Draw-a-person items of the GMDS-ER protocols were scored according to the scoring criteria of the Draw-a-Person Intellectual Ability Test for Children, Adolescents, and Adults (DAP: IQ). Key findings included the following: a statistically significant large positive correlation indicative of a marked relationship existed between standardized HFD scores and GQs. The DAP: IQ might provide a better indication of mental development than intellectual ability. A statistically significant medium positive correlation indicative of a small but definite relationship existed between chronological age and HFD raw scores. In conclusion, the findings suggest that HFDs follow a developmental progression and that HFD tests may be useful in developmental testing.
- Full Text:
- Date Issued: 2011
- Authors: Burger, Reinhart
- Date: 2011
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9869 , http://hdl.handle.net/10948/d1008068
- Description: This quantitative exploratory-descriptive study investigated the value of human figure drawing (HFD) tests for developmental testing in the South African context. Due to their characteristics such tests may be particularly suitable to screen for developmental delays in the local South African context. The objectives of the research were to explore and describe the standardized HFD scores and Griffiths Mental Development Scales – Extended Revised (GMDS-ER) general quotients (GQ) of the sample; to investigate whether a relationship exists between the standardized HFD scores and GQs; and to investigate the strength and directionality of this relationship if it was found to exist in the sample. Relevant literature was discussed and an integration of key constructs was provided. The research sample consisted of 30 GMDS-ER protocols collected at a University Psychology Clinic in the Nelson Mandela metropol, Eastern Cape, South Africa. The HFDs of the Draw-a-person items of the GMDS-ER protocols were scored according to the scoring criteria of the Draw-a-Person Intellectual Ability Test for Children, Adolescents, and Adults (DAP: IQ). Key findings included the following: a statistically significant large positive correlation indicative of a marked relationship existed between standardized HFD scores and GQs. The DAP: IQ might provide a better indication of mental development than intellectual ability. A statistically significant medium positive correlation indicative of a small but definite relationship existed between chronological age and HFD raw scores. In conclusion, the findings suggest that HFDs follow a developmental progression and that HFD tests may be useful in developmental testing.
- Full Text:
- Date Issued: 2011
Desegregation and socio-spatial integration in residential suburbs in East London, South Africa (1993-2008)
- Authors: Bwalya, John
- Date: 2011
- Subjects: City planning -- South Africa -- East London , Apartheid -- South Africa -- Eastern Cape , Migration, Internal -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Geography)
- Identifier: vital:11504 , http://hdl.handle.net/10353/336 , City planning -- South Africa -- East London , Apartheid -- South Africa -- Eastern Cape , Migration, Internal -- South Africa -- Eastern Cape
- Description: This study used integration as the overarching conceptual framework to investigate socio-spatial integration in post-apartheid South Africa. The study adopted the embedded case study design to investigate the spatial and social aspects of integration in former white residential suburbs in East London, South Africa. Recognising that integration occurred in different registers, this study used data from the South African Property Transfer Guide (SAPTG) database to investigate spatial-temporal integration in East London‟s residential suburbs from 1993 to 2008. A total of 21,683 residential property transfers were reviewed in 46 suburbs, and transfers to Blacks were identified. The residential property transfers were mapped to identify the nature of spatial integration. To investigate social integration, in-depth personal interviews were conducted on a purposively drawn sample of residents in the three case study suburbs of Southernwood, Cambridge and Gonubie. The interviews focused on three proxy indicators of social capital at neighbourhood level. The results of the study showed that post-apartheid spatial integration in East London closely followed the class-based residential template. Contrary to predictions prior to, and following apartheid‟s demise, the study showed that spatial integration occurred without racial conflicts. The study also found that social integration in the residential suburbs reflected the neighbourhood context and personal preferences, and was highly fluid. Although feelings of racial distance were evident, there were also indications of social cohesion, which were dynamic and uneven in time and space. Based on the data and the dialectical nature of spatial and social integration, the study concluded that fragmentation and integration are likely to continue coexisting in the South African city.
- Full Text:
- Date Issued: 2011
- Authors: Bwalya, John
- Date: 2011
- Subjects: City planning -- South Africa -- East London , Apartheid -- South Africa -- Eastern Cape , Migration, Internal -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Geography)
- Identifier: vital:11504 , http://hdl.handle.net/10353/336 , City planning -- South Africa -- East London , Apartheid -- South Africa -- Eastern Cape , Migration, Internal -- South Africa -- Eastern Cape
- Description: This study used integration as the overarching conceptual framework to investigate socio-spatial integration in post-apartheid South Africa. The study adopted the embedded case study design to investigate the spatial and social aspects of integration in former white residential suburbs in East London, South Africa. Recognising that integration occurred in different registers, this study used data from the South African Property Transfer Guide (SAPTG) database to investigate spatial-temporal integration in East London‟s residential suburbs from 1993 to 2008. A total of 21,683 residential property transfers were reviewed in 46 suburbs, and transfers to Blacks were identified. The residential property transfers were mapped to identify the nature of spatial integration. To investigate social integration, in-depth personal interviews were conducted on a purposively drawn sample of residents in the three case study suburbs of Southernwood, Cambridge and Gonubie. The interviews focused on three proxy indicators of social capital at neighbourhood level. The results of the study showed that post-apartheid spatial integration in East London closely followed the class-based residential template. Contrary to predictions prior to, and following apartheid‟s demise, the study showed that spatial integration occurred without racial conflicts. The study also found that social integration in the residential suburbs reflected the neighbourhood context and personal preferences, and was highly fluid. Although feelings of racial distance were evident, there were also indications of social cohesion, which were dynamic and uneven in time and space. Based on the data and the dialectical nature of spatial and social integration, the study concluded that fragmentation and integration are likely to continue coexisting in the South African city.
- Full Text:
- Date Issued: 2011
Factors affecting people with disabilities in the employment sector
- Authors: Caga, Tabisa
- Date: 2011
- Subjects: Blind -- Employment , People with visual disabilities -- Employment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9992 , http://hdl.handle.net/10948/1549 , Blind -- Employment , People with visual disabilities -- Employment
- Description: Since 1994, the South African Government has formulated various policies in an attempt to redress the previous political, economic and social imbalances within the country. The majority of the policies have focused on empowering previously disadvantaged groups including people with disabilities. Despite the interventions, literature reviewed reflects that there is very little progress made with regard to empowerment of people with disabilities in the employment sector. The study seeks to explore and identify factors that affect people with visual disabilities in the employment sector. The researcher used a qualitative approach to investigate the perceptions of people with visual disabilities through conducting focus groups interviews with participants that were recruited using a purposive sampling approach. A total of four groups from Pretoria have been used to draw findings for the research study. During the focus group discussions, a semi structured interview guide was used to generate more in‐depth interpretations from the participants and data was analysed using Tesch’s (1990) framework that is described in Creswell (2003). The findings of the research revealed that people with visual disabilities still have problems in accessing and retaining employment despite the South African favourable legislation. Dominating among the factors that are viewed by the participants to hinder their employability are societal negatives attitudes which include unequal treatment, discrimination when they seek employment, belittling and disregard by employers, coworkers and the society at large. There are also a number of factors that were perceived as barriers to job seekers with visual disabilities which include inaccessible advertising media for vacancies, inaccessible transports systems, inaccessible education and training and lack of funded positions suited for people with visual disabilities.
- Full Text:
- Date Issued: 2011
- Authors: Caga, Tabisa
- Date: 2011
- Subjects: Blind -- Employment , People with visual disabilities -- Employment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9992 , http://hdl.handle.net/10948/1549 , Blind -- Employment , People with visual disabilities -- Employment
- Description: Since 1994, the South African Government has formulated various policies in an attempt to redress the previous political, economic and social imbalances within the country. The majority of the policies have focused on empowering previously disadvantaged groups including people with disabilities. Despite the interventions, literature reviewed reflects that there is very little progress made with regard to empowerment of people with disabilities in the employment sector. The study seeks to explore and identify factors that affect people with visual disabilities in the employment sector. The researcher used a qualitative approach to investigate the perceptions of people with visual disabilities through conducting focus groups interviews with participants that were recruited using a purposive sampling approach. A total of four groups from Pretoria have been used to draw findings for the research study. During the focus group discussions, a semi structured interview guide was used to generate more in‐depth interpretations from the participants and data was analysed using Tesch’s (1990) framework that is described in Creswell (2003). The findings of the research revealed that people with visual disabilities still have problems in accessing and retaining employment despite the South African favourable legislation. Dominating among the factors that are viewed by the participants to hinder their employability are societal negatives attitudes which include unequal treatment, discrimination when they seek employment, belittling and disregard by employers, coworkers and the society at large. There are also a number of factors that were perceived as barriers to job seekers with visual disabilities which include inaccessible advertising media for vacancies, inaccessible transports systems, inaccessible education and training and lack of funded positions suited for people with visual disabilities.
- Full Text:
- Date Issued: 2011
The synthesis and photophysical properties of peripherally and non-peripherally substituted ball-type Mg (II) and Zn (II) phthalocyanines
- Canlica, Mevlude, Nyokong, Tebello
- Authors: Canlica, Mevlude , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248417 , vital:51684 , xlink:href="https://doi.org/10.1039/C0DT00920B"
- Description: Newly synthesized ball-type Zn(II) and Mg(II) phthalocyanines containing four 1,1′-binaphthol substituents at peripheral and non-peripheral positions are presented. The structures of the synthesized compounds were characterized by using elemental analysis, UV-vis, FT-IR, 1H-NMR and mass spectroscopies. The ΦF values were 0.33, 0.08, 0.20 and 0.08 for 6–9, respectively. The ΦT values were 0.56, 0.85, 0.64 and 0.88 for 6–9, respectively. All the complexes showed reasonably large triplet lifetimes with τT values of 710 (6), 170 (7), 1490 (8) and 380 μs (9) in DMSO. These complexes offer potential as photosensitizers in photodynamic therapy.
- Full Text:
- Date Issued: 2011
- Authors: Canlica, Mevlude , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248417 , vital:51684 , xlink:href="https://doi.org/10.1039/C0DT00920B"
- Description: Newly synthesized ball-type Zn(II) and Mg(II) phthalocyanines containing four 1,1′-binaphthol substituents at peripheral and non-peripheral positions are presented. The structures of the synthesized compounds were characterized by using elemental analysis, UV-vis, FT-IR, 1H-NMR and mass spectroscopies. The ΦF values were 0.33, 0.08, 0.20 and 0.08 for 6–9, respectively. The ΦT values were 0.56, 0.85, 0.64 and 0.88 for 6–9, respectively. All the complexes showed reasonably large triplet lifetimes with τT values of 710 (6), 170 (7), 1490 (8) and 380 μs (9) in DMSO. These complexes offer potential as photosensitizers in photodynamic therapy.
- Full Text:
- Date Issued: 2011
Synthesis, characterization, and photophysical properties of novel ball-type dinuclear and mononuclear containing four 1, 1′-binaphthyl-8, 8′-diol bridged metallophthalocyanines with long triplet state lifetimes
- Canlıca, Mevlude, Nyokong, Tebello
- Authors: Canlıca, Mevlude , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248406 , vital:51683 , xlink:href="https://doi.org/10.1039/C0DT01749C"
- Description: The syntheses of new ball-type dinuclear Si(IV)(CH3COO)2 and Ti(IV)O phthalocyanines and two different mononuclear Zn(II) and Ti(IV)O phthalocyanines containing four 1,1′-binaphthyl-8,8′-diol substituents on the peripheral positions are described. The structures of these compounds were characterized using the elemental analyzes, UV-Vis, FT-IR, 1H NMR and mass spectroscopies. The ΦF values are 0.14, 0.10, 0.04, 0.02, 0.07; ΦT values are 0.69, 0.71, 0.85, 0.33, 0.71 for 7–11, respectively. All complexes showed very long triplet lifetimes with τT 7510, 3190, 2880, 2370, 9470 μs for 7–11 in DMSO, respectively.
- Full Text:
- Date Issued: 2011
- Authors: Canlıca, Mevlude , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248406 , vital:51683 , xlink:href="https://doi.org/10.1039/C0DT01749C"
- Description: The syntheses of new ball-type dinuclear Si(IV)(CH3COO)2 and Ti(IV)O phthalocyanines and two different mononuclear Zn(II) and Ti(IV)O phthalocyanines containing four 1,1′-binaphthyl-8,8′-diol substituents on the peripheral positions are described. The structures of these compounds were characterized using the elemental analyzes, UV-Vis, FT-IR, 1H NMR and mass spectroscopies. The ΦF values are 0.14, 0.10, 0.04, 0.02, 0.07; ΦT values are 0.69, 0.71, 0.85, 0.33, 0.71 for 7–11, respectively. All complexes showed very long triplet lifetimes with τT 7510, 3190, 2880, 2370, 9470 μs for 7–11 in DMSO, respectively.
- Full Text:
- Date Issued: 2011
Syntheses, electrochemical and spectroelectrochemical properties of novel ball-type and mononuclear Co (II) phthalocyanines substituted at the peripheral and non-peripheral positions with binaphthol groups
- Canlıca, Mevlüde, Booysen, Irvin Noel, Nyokong, Tebello
- Authors: Canlıca, Mevlüde , Booysen, Irvin Noel , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247837 , vital:51622 , xlink:href="https://doi.org/10.1016/j.poly.2010.11.017"
- Description: Mononuclear cobalt phthalocyanine (CoPc) substituted at the non-peripheral 8 and peripheral positions 9 with 1,1′-binaphthyl-8,8′-diol and ball-type dinuclear Co2Pc2 substituted at the non-peripheral 10 and peripheral 11 positions with the same substituent are reported. The complexes with 1,1′-binaphthol-bridges were prepared from the corresponding phthalonitriles 4–7. The effects of the position of substituent on spectral, electrochemical and spectroelectrochemical properties of these complexes were also explored. The mononuclear complexes 8 and 9 exhibited one metal reduction, one ring reduction and one ring oxidation. The redox properties of the ball-type complexes 10 and 11 exhibited two reduction processes assigned to [(CoIPc−2)2]2−/[(CoIPc−3)2]4− (I), (CoIIPc−2)2/[(CoIPc−2)2]2− (II) and one oxidation process assigned to [(CoIIIPc−2)2]2+/CoIIPc−2)2 (III). The ball-type complexes are much easier to oxidize and more difficult to reduce than the corresponding monomers 8 and 9.
- Full Text:
- Date Issued: 2011
- Authors: Canlıca, Mevlüde , Booysen, Irvin Noel , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247837 , vital:51622 , xlink:href="https://doi.org/10.1016/j.poly.2010.11.017"
- Description: Mononuclear cobalt phthalocyanine (CoPc) substituted at the non-peripheral 8 and peripheral positions 9 with 1,1′-binaphthyl-8,8′-diol and ball-type dinuclear Co2Pc2 substituted at the non-peripheral 10 and peripheral 11 positions with the same substituent are reported. The complexes with 1,1′-binaphthol-bridges were prepared from the corresponding phthalonitriles 4–7. The effects of the position of substituent on spectral, electrochemical and spectroelectrochemical properties of these complexes were also explored. The mononuclear complexes 8 and 9 exhibited one metal reduction, one ring reduction and one ring oxidation. The redox properties of the ball-type complexes 10 and 11 exhibited two reduction processes assigned to [(CoIPc−2)2]2−/[(CoIPc−3)2]4− (I), (CoIIPc−2)2/[(CoIPc−2)2]2− (II) and one oxidation process assigned to [(CoIIIPc−2)2]2+/CoIIPc−2)2 (III). The ball-type complexes are much easier to oxidize and more difficult to reduce than the corresponding monomers 8 and 9.
- Full Text:
- Date Issued: 2011
Synthesis and electrochemical behavior of novel peripherally and non-peripherally substituted ball-type cobalt phthalocyanine complexes
- Canlıca, Mevlüde, Booysen, Irvin Noel, Nyokong, Tebello
- Authors: Canlıca, Mevlüde , Booysen, Irvin Noel , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247848 , vital:51623 , xlink:href="https://doi.org/10.1016/j.poly.2010.11.028"
- Description: The syntheses of new ball-type Co(II) phthalocyanines containing 4,4′-(9H-fluorene-9,9-diyl)diphenol substituents at non-peripheral (complex 6) and peripheral (complex 7) positions are presented. These complexes were characterized by UV–Vis, FT-IR, mass spectroscopy and electrochemical methods. Both complexes exhibit metal and ring based redox processes, typical of cobalt phthalocyanine complexes. For 6, the metal based reduction was observed at −0.46 V followed by a ring based reduction at −1.40 V. The metal oxidation for 6 was observed at +0.16 V and the ring based oxidation at +1.05 V. For 7, reductions are easier but the oxidations are more difficult. The metal based reduction for 7 was observed at −0.38 V followed by a ring based reduction at −1.03 V. The metal oxidation for 7 was observed at +0.20 V and the ring based oxidation at +1.35 V.
- Full Text:
- Date Issued: 2011
- Authors: Canlıca, Mevlüde , Booysen, Irvin Noel , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247848 , vital:51623 , xlink:href="https://doi.org/10.1016/j.poly.2010.11.028"
- Description: The syntheses of new ball-type Co(II) phthalocyanines containing 4,4′-(9H-fluorene-9,9-diyl)diphenol substituents at non-peripheral (complex 6) and peripheral (complex 7) positions are presented. These complexes were characterized by UV–Vis, FT-IR, mass spectroscopy and electrochemical methods. Both complexes exhibit metal and ring based redox processes, typical of cobalt phthalocyanine complexes. For 6, the metal based reduction was observed at −0.46 V followed by a ring based reduction at −1.40 V. The metal oxidation for 6 was observed at +0.16 V and the ring based oxidation at +1.05 V. For 7, reductions are easier but the oxidations are more difficult. The metal based reduction for 7 was observed at −0.38 V followed by a ring based reduction at −1.03 V. The metal oxidation for 7 was observed at +0.20 V and the ring based oxidation at +1.35 V.
- Full Text:
- Date Issued: 2011
Electrochemical behavior of phthalocyanines containing high oxidation state central metals
- Chauke, Vongani, Arslanoglu, Yasin, Nyokong, Tebello
- Authors: Chauke, Vongani , Arslanoglu, Yasin , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247111 , vital:51547 , xlink:href="https://doi.org/10.1016/j.poly.2011.05.028"
- Description: The syntheses of 2,(3)-(peripheral) and 1,(4)-(non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium(IV) oxide (5a and 6a, respectively), vanadium(IV) oxide (7a and 8a, respectively) and tantalum(V) hydroxide (9a, peripheral only) and their electrochemical characterization are presented in this report. Their electrochemistry is compared to that of thiophenyl and thiobenzyl substituted derivatives. The non-peripherally substituted complexes are more difficult to reduce than peripherally substituted derivatives. In addition, the mercaptopyridine substituted derivatives are more difficult to reduce compared to benzylmercapto and phenylmercapto derivatives, and aryl easier reduce than alkyl substitution. Spectroelectrochemistry of the complexes confirmed metal and ring redox processes for TaPc and TiPc derivatives and ring based processes only for VPc complexes.
- Full Text:
- Date Issued: 2011
- Authors: Chauke, Vongani , Arslanoglu, Yasin , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247111 , vital:51547 , xlink:href="https://doi.org/10.1016/j.poly.2011.05.028"
- Description: The syntheses of 2,(3)-(peripheral) and 1,(4)-(non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium(IV) oxide (5a and 6a, respectively), vanadium(IV) oxide (7a and 8a, respectively) and tantalum(V) hydroxide (9a, peripheral only) and their electrochemical characterization are presented in this report. Their electrochemistry is compared to that of thiophenyl and thiobenzyl substituted derivatives. The non-peripherally substituted complexes are more difficult to reduce than peripherally substituted derivatives. In addition, the mercaptopyridine substituted derivatives are more difficult to reduce compared to benzylmercapto and phenylmercapto derivatives, and aryl easier reduce than alkyl substitution. Spectroelectrochemistry of the complexes confirmed metal and ring redox processes for TaPc and TiPc derivatives and ring based processes only for VPc complexes.
- Full Text:
- Date Issued: 2011
The Electrochemical Behavior of Gold Nanoparticle‐Tantalum (V) Phthalocyanine Composites
- Chauke, Vongani, Chidawanyika, Wadzanai J U, Nyokong, Tebello
- Authors: Chauke, Vongani , Chidawanyika, Wadzanai J U , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247915 , vital:51629 , xlink:href="https://doi.org/10.1002/elan.201000521"
- Description: The formation of gold nanoparticle (AuNP) composites with tantalum phthalocyanines (TaPc) complexes {1a and 1b (Figure 1)} is reported. The TaPc-AuNPs conjugates were characterised by atomic force microscopy (AFM) and transmission electron microscopy. The AFM analyses show that conjugates of TaPc with AuNPs are more aggregated when compared to AuNPs alone. The conjugates and TaPc complexes were immobilized on a gold electrode by drop and dry method and these were characterized by electrochemical impedance spectroscopy. The charge transfer behaviour of AuNPs was enhanced in the presence of TaPc complexes. All the modified electrodes showed electrocatalytic oxidation of bisphenol A. The limits of detection for complexes 1a and 1b were 4.78×10−10 and 2.76×10−10 mol L−1, respectively.
- Full Text:
- Date Issued: 2011
- Authors: Chauke, Vongani , Chidawanyika, Wadzanai J U , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247915 , vital:51629 , xlink:href="https://doi.org/10.1002/elan.201000521"
- Description: The formation of gold nanoparticle (AuNP) composites with tantalum phthalocyanines (TaPc) complexes {1a and 1b (Figure 1)} is reported. The TaPc-AuNPs conjugates were characterised by atomic force microscopy (AFM) and transmission electron microscopy. The AFM analyses show that conjugates of TaPc with AuNPs are more aggregated when compared to AuNPs alone. The conjugates and TaPc complexes were immobilized on a gold electrode by drop and dry method and these were characterized by electrochemical impedance spectroscopy. The charge transfer behaviour of AuNPs was enhanced in the presence of TaPc complexes. All the modified electrodes showed electrocatalytic oxidation of bisphenol A. The limits of detection for complexes 1a and 1b were 4.78×10−10 and 2.76×10−10 mol L−1, respectively.
- Full Text:
- Date Issued: 2011
Comparative behavior of conjugates of tantalum phthalocyanines with gold nanoparticles or single walled carbon nanotubes towards bisphenol A electrocatalysis
- Chauke, Vongani P, Antunes, Edith M, Nyokong, Tebello
- Authors: Chauke, Vongani P , Antunes, Edith M , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247152 , vital:51551 , xlink:href="https://doi.org/10.1016/j.jelechem.2011.06.019"
- Description: The characterization of tantalum phthalocyanine conjugates with gold nanoparticles and single wall carbon nanotubes as well as their electrocatalytic oxidation of bisphenol A is hereby presented. The formation of the conjugates was confirmed by X-ray diffraction and transmission electron microscope techniques. Single walled carbon nanotube conjugates of TaPc complexes showed the best catalysis as well as less passivation for bisphenol A detection and significant recovery of ∼98% compared to gold nanoparticle conjugates.
- Full Text:
- Date Issued: 2011
- Authors: Chauke, Vongani P , Antunes, Edith M , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247152 , vital:51551 , xlink:href="https://doi.org/10.1016/j.jelechem.2011.06.019"
- Description: The characterization of tantalum phthalocyanine conjugates with gold nanoparticles and single wall carbon nanotubes as well as their electrocatalytic oxidation of bisphenol A is hereby presented. The formation of the conjugates was confirmed by X-ray diffraction and transmission electron microscope techniques. Single walled carbon nanotube conjugates of TaPc complexes showed the best catalysis as well as less passivation for bisphenol A detection and significant recovery of ∼98% compared to gold nanoparticle conjugates.
- Full Text:
- Date Issued: 2011
Synthesis and photophysical behaviour of tantalum and titanium phthalocyanines in the presence of gold nanoparticles
- Chauke, Vongani P, Arslanoglu, Yasin, Nyokong, Tebello
- Authors: Chauke, Vongani P , Arslanoglu, Yasin , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247545 , vital:51593 , xlink:href="https://doi.org/10.1016/j.jphotochem.2011.04.020"
- Description: We report on the synthesis of 2,(3)- (peripheral) and 1,(4)- (non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium (IV) oxide (5 and 6 respectively), and tantalum (III) hydroxide (7, peripheral only), their photochemical and photophysical parameters and the photocatalytic oxidation of cyclohexene in the presence of gold nanoparticles (AuNPs). The singlet oxygen quantum yield values increased in the presence of AuNPs, for complexes 5 and 6. The percentage conversion values for cyclohexene using 5, 6 and 7 were 27%, 20% and 14%, respectively. These values increased considerably in the presence of AuNPs, except complex for 7. The products obtained include cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. Low values of singlet oxygen quantum yields favour the formation of 1,2-cyclohexanediol.
- Full Text:
- Date Issued: 2011
- Authors: Chauke, Vongani P , Arslanoglu, Yasin , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247545 , vital:51593 , xlink:href="https://doi.org/10.1016/j.jphotochem.2011.04.020"
- Description: We report on the synthesis of 2,(3)- (peripheral) and 1,(4)- (non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium (IV) oxide (5 and 6 respectively), and tantalum (III) hydroxide (7, peripheral only), their photochemical and photophysical parameters and the photocatalytic oxidation of cyclohexene in the presence of gold nanoparticles (AuNPs). The singlet oxygen quantum yield values increased in the presence of AuNPs, for complexes 5 and 6. The percentage conversion values for cyclohexene using 5, 6 and 7 were 27%, 20% and 14%, respectively. These values increased considerably in the presence of AuNPs, except complex for 7. The products obtained include cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. Low values of singlet oxygen quantum yields favour the formation of 1,2-cyclohexanediol.
- Full Text:
- Date Issued: 2011
Photocatalytic behaviour of tantalum (V) phthalocyanines in the presence of gold nanoparticles towards the oxidation of cyclohexene
- Chauke, Vongani P, Antunes, Edith M, Chidawanyika, Wadzanai J U, Nyokong, Tebello
- Authors: Chauke, Vongani P , Antunes, Edith M , Chidawanyika, Wadzanai J U , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247904 , vital:51628 , xlink:href="https://doi.org/10.1016/j.molcata.2010.11.023"
- Description: This paper presents the photocatalytic oxidation of cyclohexene using (OH)3TaPc derivatives in the absence or presence of gold nanoparticles (AuNPs). The photochemical parameters that include photodegradation (ΦP) and singlet oxygen (ΦΔ) quantum yields are also reported in this work. The ΦΔ values were 0.47 and 0.36 for complexes 1a and 1b, respectively. The ΦΔ values improved drastically in the presence of AuNPs to 0.75 and 0.88, respectively. The ΦP values ranged from 1.02 to 2.45 × 10−6, showing stability of TaPc derivatives in the absence and presence of AuNPs. The photocatalytic products identified using gas chromatograph (GC) are cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. The percentage conversion values were higher in the presence of AuNPs. Singlet oxygen was determined to be the main agent involved in the photocatalytic oxidation of cyclohexene. The product yield percentage values for both TaPc complexes (1a and 1b) and TaPc in the presence of AuNPs ranged from 6.3 to 21.2%.
- Full Text:
- Date Issued: 2011
- Authors: Chauke, Vongani P , Antunes, Edith M , Chidawanyika, Wadzanai J U , Nyokong, Tebello
- Date: 2011
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/247904 , vital:51628 , xlink:href="https://doi.org/10.1016/j.molcata.2010.11.023"
- Description: This paper presents the photocatalytic oxidation of cyclohexene using (OH)3TaPc derivatives in the absence or presence of gold nanoparticles (AuNPs). The photochemical parameters that include photodegradation (ΦP) and singlet oxygen (ΦΔ) quantum yields are also reported in this work. The ΦΔ values were 0.47 and 0.36 for complexes 1a and 1b, respectively. The ΦΔ values improved drastically in the presence of AuNPs to 0.75 and 0.88, respectively. The ΦP values ranged from 1.02 to 2.45 × 10−6, showing stability of TaPc derivatives in the absence and presence of AuNPs. The photocatalytic products identified using gas chromatograph (GC) are cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. The percentage conversion values were higher in the presence of AuNPs. Singlet oxygen was determined to be the main agent involved in the photocatalytic oxidation of cyclohexene. The product yield percentage values for both TaPc complexes (1a and 1b) and TaPc in the presence of AuNPs ranged from 6.3 to 21.2%.
- Full Text:
- Date Issued: 2011
Building employee value proposition for attracting and retaining talent in large organisations in South Africa
- Authors: Chen, Shih-hwa James
- Date: 2011
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9121 , http://hdl.handle.net/10948/d1016056
- Description: Globalisation of businesses and the advancement of information technology have changed the way employees think, live and behave. As a result, some of the traditional theories and models on talent management have been tested, and to some extent, challenged. Companies large and small must be creative, responsive and ready to let go outdated management practices when challenged by new paradigms to improve competitiveness and alignment to market needs. In the current climate of widespread skill shortages and declining workforce numbers, large organisations continue to wrestle with appropriate management practices that could truly protect their most valuable asset – its people. This research was aimed at providing an insight into what makes a good attraction and retention strategy for large organisations in South Africa. It further examined the principles which underpin an effective employee value proposition that would capture comprehensively the expectations, personal needs and career goals of the new generation employees especially in a developing economy. Quantitative data focusing on students‘ expectations on their future employer of choice was collected via a national survey distributed at 23 tertiary institutions in South Africa during career fairs. Qualitative data was collected through focus group discussions with a sample of SARS graduate employees. Triangulation of results was possible and the analysis of data provided scientific evidence for meaningful conclusions and recommendations. The findings of this research enabled the development of a structured argument in terms of what organisations need to start, stop and continue doing to improve the talent management practices for attracting, developing and retaining highly talented people. The research further enabled the identification of key components that are essential for building an attractive and practical EVP for large organizations that focus on enhancing the value of their talent in the 21st century.
- Full Text:
- Date Issued: 2011
- Authors: Chen, Shih-hwa James
- Date: 2011
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9121 , http://hdl.handle.net/10948/d1016056
- Description: Globalisation of businesses and the advancement of information technology have changed the way employees think, live and behave. As a result, some of the traditional theories and models on talent management have been tested, and to some extent, challenged. Companies large and small must be creative, responsive and ready to let go outdated management practices when challenged by new paradigms to improve competitiveness and alignment to market needs. In the current climate of widespread skill shortages and declining workforce numbers, large organisations continue to wrestle with appropriate management practices that could truly protect their most valuable asset – its people. This research was aimed at providing an insight into what makes a good attraction and retention strategy for large organisations in South Africa. It further examined the principles which underpin an effective employee value proposition that would capture comprehensively the expectations, personal needs and career goals of the new generation employees especially in a developing economy. Quantitative data focusing on students‘ expectations on their future employer of choice was collected via a national survey distributed at 23 tertiary institutions in South Africa during career fairs. Qualitative data was collected through focus group discussions with a sample of SARS graduate employees. Triangulation of results was possible and the analysis of data provided scientific evidence for meaningful conclusions and recommendations. The findings of this research enabled the development of a structured argument in terms of what organisations need to start, stop and continue doing to improve the talent management practices for attracting, developing and retaining highly talented people. The research further enabled the identification of key components that are essential for building an attractive and practical EVP for large organizations that focus on enhancing the value of their talent in the 21st century.
- Full Text:
- Date Issued: 2011
The influence of leadership on the organisational effectiveness of SAPS precincts
- Authors: Chetty, Sandy-Lee
- Date: 2011
- Subjects: South Africa Police Service , Organizational effectiveness -- South Africa -- Nelson Mandela Bay , Leadership -- South Africa -- Nelson Mandela Bay
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8607 , http://hdl.handle.net/10948/1590 , South Africa Police Service , Organizational effectiveness -- South Africa -- Nelson Mandela Bay , Leadership -- South Africa -- Nelson Mandela Bay
- Description: Public institutions have the responsibility to deliver various services to the public in the most effective and efficient manner. In South Africa, many public sector reforms were instituted after 1994. The main reasons for these reforms were to improve the access of the historically disadvantaged to public services, to increase efficiencies, to reduce costs and to reduce public debt. Despite improvements to the policy framework that underpins service delivery by the public sector, however, there are still many challenges in the delivery of public services. An improved public policy to deliver service alone is not enough if not supported by effective systems and processes for actual delivery, as well as effective leadership that leads and ensures the delivery of such services. Improving the organisational effectiveness of public institutions is therefore important in South Africa. The present study explores the role that leadership plays in the pursuit of organisational effectiveness in a selected public institution, namely the South African Police Service (SAPS). The primary objective of this study is to improve the organisational effectiveness of SAPS in the Nelson Mandela Bay municipal area by investigating the influence of leadership style (transactional and transformational) and personality (Machiavellian, narcissistic, collectivistic, masculine and feminine) on organisational effectiveness of SAPS (as measured by overall organisational performance and the individual job performance intentions of police officers). The research design is positivistic, as the relationships among the above-mentioned variables are statistically tested. The sample consisted of 90 police officers of senior rank drawn from five police stations in the Nelson Mandela Bay. The empirical results were reported and interpreted. These results revealed that constructive narcissistic and collectivistic leadership personality traits, as well as transformational leadership style exert a positive influence on the organisational performance of the Nelson Mandela Bay police precincts. The empirical results also showed that collectivistic leadership personality traits influence the performance intent of these police officials positively. These results are discussed in terms of the implications they hold for the managers of police precincts. The limitations of the study are reported which provide areas for future research.
- Full Text:
- Date Issued: 2011
- Authors: Chetty, Sandy-Lee
- Date: 2011
- Subjects: South Africa Police Service , Organizational effectiveness -- South Africa -- Nelson Mandela Bay , Leadership -- South Africa -- Nelson Mandela Bay
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8607 , http://hdl.handle.net/10948/1590 , South Africa Police Service , Organizational effectiveness -- South Africa -- Nelson Mandela Bay , Leadership -- South Africa -- Nelson Mandela Bay
- Description: Public institutions have the responsibility to deliver various services to the public in the most effective and efficient manner. In South Africa, many public sector reforms were instituted after 1994. The main reasons for these reforms were to improve the access of the historically disadvantaged to public services, to increase efficiencies, to reduce costs and to reduce public debt. Despite improvements to the policy framework that underpins service delivery by the public sector, however, there are still many challenges in the delivery of public services. An improved public policy to deliver service alone is not enough if not supported by effective systems and processes for actual delivery, as well as effective leadership that leads and ensures the delivery of such services. Improving the organisational effectiveness of public institutions is therefore important in South Africa. The present study explores the role that leadership plays in the pursuit of organisational effectiveness in a selected public institution, namely the South African Police Service (SAPS). The primary objective of this study is to improve the organisational effectiveness of SAPS in the Nelson Mandela Bay municipal area by investigating the influence of leadership style (transactional and transformational) and personality (Machiavellian, narcissistic, collectivistic, masculine and feminine) on organisational effectiveness of SAPS (as measured by overall organisational performance and the individual job performance intentions of police officers). The research design is positivistic, as the relationships among the above-mentioned variables are statistically tested. The sample consisted of 90 police officers of senior rank drawn from five police stations in the Nelson Mandela Bay. The empirical results were reported and interpreted. These results revealed that constructive narcissistic and collectivistic leadership personality traits, as well as transformational leadership style exert a positive influence on the organisational performance of the Nelson Mandela Bay police precincts. The empirical results also showed that collectivistic leadership personality traits influence the performance intent of these police officials positively. These results are discussed in terms of the implications they hold for the managers of police precincts. The limitations of the study are reported which provide areas for future research.
- Full Text:
- Date Issued: 2011
An assessment of the implementation of the national decentralisation policy in Zomba District Council in Malawi: (2009-2010)
- Authors: Chibwana, Atanazio Gabriel
- Date: 2011
- Subjects: Decentralization in government -- Malawi , Local government -- Malawi , Regional planning -- Malawi
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11626 , http://hdl.handle.net/10353/542 , Decentralization in government -- Malawi , Local government -- Malawi , Regional planning -- Malawi
- Description: This study was aimed at assessing the implementation status of the National Decentralisation Policy in Zomba District Council in Malawi given the current situation where the council is operating without ward councilors. It also undertook an exploration of factors affecting the implementation of the National Decentralisation Policy in Zomba District Council and made recommendations which can positively contribute to the effective implementation of the National Decentralisation Policy in Zomba District Council. Using both qualitative and quantitative research design, data for the study was collected using interviews, questionnaires and document analysis. The study found that the implementation of the National Decentralisation Policy in Zomba District Council during the period under study was unsatisfactory. The major challenges to the implementation of the National Decentralisation Policy in Zomba District Council were largely linked to the absence of councilors in the current council setup, violation of legal instruments governing the implementation of the National Decentralisation Policy by the incumbent leadership, lack of political will among the ruling elite to see full implementation of the National Decentralisation Policy, poor performance of structures operating in place of ward and council committees and inadequate finances at the disposal of Zomba District Council. The study concluded that Zomba District Council needed ward councilors to fully implement the National Decentralisation Policy. However the study also observed that it would be impossible to attain the objectives of the decentralization policy if there was no political will on the part of the incumbent leadership to see the National Decentralisation Policy implemented in full at Zomba District Council.
- Full Text:
- Date Issued: 2011
- Authors: Chibwana, Atanazio Gabriel
- Date: 2011
- Subjects: Decentralization in government -- Malawi , Local government -- Malawi , Regional planning -- Malawi
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11626 , http://hdl.handle.net/10353/542 , Decentralization in government -- Malawi , Local government -- Malawi , Regional planning -- Malawi
- Description: This study was aimed at assessing the implementation status of the National Decentralisation Policy in Zomba District Council in Malawi given the current situation where the council is operating without ward councilors. It also undertook an exploration of factors affecting the implementation of the National Decentralisation Policy in Zomba District Council and made recommendations which can positively contribute to the effective implementation of the National Decentralisation Policy in Zomba District Council. Using both qualitative and quantitative research design, data for the study was collected using interviews, questionnaires and document analysis. The study found that the implementation of the National Decentralisation Policy in Zomba District Council during the period under study was unsatisfactory. The major challenges to the implementation of the National Decentralisation Policy in Zomba District Council were largely linked to the absence of councilors in the current council setup, violation of legal instruments governing the implementation of the National Decentralisation Policy by the incumbent leadership, lack of political will among the ruling elite to see full implementation of the National Decentralisation Policy, poor performance of structures operating in place of ward and council committees and inadequate finances at the disposal of Zomba District Council. The study concluded that Zomba District Council needed ward councilors to fully implement the National Decentralisation Policy. However the study also observed that it would be impossible to attain the objectives of the decentralization policy if there was no political will on the part of the incumbent leadership to see the National Decentralisation Policy implemented in full at Zomba District Council.
- Full Text:
- Date Issued: 2011
An investigation of talent management and staff retention at the Bank of Zambia
- Chikumbi, Charity Nonde Luchembe
- Authors: Chikumbi, Charity Nonde Luchembe
- Date: 2011
- Subjects: Bank of Zambia -- Personnel management , Personnel management -- Zambia , Banks and banking -- Zambia -- Personnel management , Organizational effectiveness , Employee retention -- Zambia
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8604 , http://hdl.handle.net/10948/1611 , Bank of Zambia -- Personnel management , Personnel management -- Zambia , Banks and banking -- Zambia -- Personnel management , Organizational effectiveness , Employee retention -- Zambia
- Description: There is no question that effective talent management requires a well-defined process. Talent management includes all talent processes needed to optimise people within an organization. The processes include: attracting, recruiting targeted selection, performance management, succession planning, talent reviews, development planning and support, career development, and workforce planning. The hired employees should be developed to mould into the organization culture so that they support the vision and mission of the organization. Retention of key employee is critical to the long term success of business as it ensures customer satisfaction, product sales, and satisfied co-workers, reporting staff, effective succession planning and a deeply embedded organisational knowledge and learning culture. iii The research problem in this study was to investigate how successfully Talent Management and Employee Retention strategies been implemented at the Bank of Zambia. To achieve this objective a comprehensive study was undertaken on talent management and employee retention. The study involved conducting a literature survey to understand the processes that are necessary for implementation of talent management and employee retention in an organization. An empirical study was later conducted to investigate whether the processes of talent management and employee retention have been successfully implemented at the Bank of Zambia. The survey was compared to the literature review to determine whether the Bank of Zambia complied with the findings in the literature review. The main findings from this research are that for talent management to be successful, the initial step of planning right from the strategic point of aligning to talent goals to business goals through to succession planning should be well conducted. This process needed special attention. As much as the empirical study showed a case of progress towards engagement, there was concern raised regarding job security. Some employees perceived that they were insecure in their job. Compensation and rewards were also perceived to lack equity in their distribution and that promotion and career progression were below expectation for may employees The final observation from the investigation was that the organizational culture was not well adopted by respondents. . Employees perceived that the culture did not support innovation and the rewards system did not provide incentives for better performance.
- Full Text:
- Date Issued: 2011
- Authors: Chikumbi, Charity Nonde Luchembe
- Date: 2011
- Subjects: Bank of Zambia -- Personnel management , Personnel management -- Zambia , Banks and banking -- Zambia -- Personnel management , Organizational effectiveness , Employee retention -- Zambia
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8604 , http://hdl.handle.net/10948/1611 , Bank of Zambia -- Personnel management , Personnel management -- Zambia , Banks and banking -- Zambia -- Personnel management , Organizational effectiveness , Employee retention -- Zambia
- Description: There is no question that effective talent management requires a well-defined process. Talent management includes all talent processes needed to optimise people within an organization. The processes include: attracting, recruiting targeted selection, performance management, succession planning, talent reviews, development planning and support, career development, and workforce planning. The hired employees should be developed to mould into the organization culture so that they support the vision and mission of the organization. Retention of key employee is critical to the long term success of business as it ensures customer satisfaction, product sales, and satisfied co-workers, reporting staff, effective succession planning and a deeply embedded organisational knowledge and learning culture. iii The research problem in this study was to investigate how successfully Talent Management and Employee Retention strategies been implemented at the Bank of Zambia. To achieve this objective a comprehensive study was undertaken on talent management and employee retention. The study involved conducting a literature survey to understand the processes that are necessary for implementation of talent management and employee retention in an organization. An empirical study was later conducted to investigate whether the processes of talent management and employee retention have been successfully implemented at the Bank of Zambia. The survey was compared to the literature review to determine whether the Bank of Zambia complied with the findings in the literature review. The main findings from this research are that for talent management to be successful, the initial step of planning right from the strategic point of aligning to talent goals to business goals through to succession planning should be well conducted. This process needed special attention. As much as the empirical study showed a case of progress towards engagement, there was concern raised regarding job security. Some employees perceived that they were insecure in their job. Compensation and rewards were also perceived to lack equity in their distribution and that promotion and career progression were below expectation for may employees The final observation from the investigation was that the organizational culture was not well adopted by respondents. . Employees perceived that the culture did not support innovation and the rewards system did not provide incentives for better performance.
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- Date Issued: 2011
Triggers and barriers to youth entrepreneurship in the Eastern Cape South Africa
- Authors: Chindoga, Lynety
- Date: 2011
- Subjects: Youth development -- South Africa , Entrepreneurship -- South Africa -- Eastern Cape , Young adults -- Employment -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25948 , vital:64636
- Description: To realise the dream of the African Renaissance and a better life for all South Africans, the entrepreneurial energies of all people, including children, should be harnessed to contribute towards economic development, job creation and poverty alleviation. Entrepreneurship creates wealth and results in economic prosperity for a country. However, in South Africa, entrepreneurship still remains a dream yet to be realised. This is supported by the findings of Maas and Herrington (2006), who identified entrepreneurial activity in South Africa to be very weak as evidenced by a low Total Entrepreneurial Activity (TEA) rate. Youths are not engaging in entrepreneurial activity and are making the bulk of the unemployed in South Africa. The primary objective of this study was to investigate the perceived triggers and barriers to youth entrepreneurship in South Africa. Two sets of questionnaires were self- administered to high school students and university students. The respondents which consisted of three hundred and twenty three university students and two hundred and fifty six high school students, were selected using simple random sampling method. Five point Likert scale was used to measure the responses. Descriptive as well as inferential statistics were used to analyse the data. The results indicated that youth entrepreneurial intention is low in South Africa. The results also indicated that students perceived mainly extrinsic rewards, market opportunities as well as intrinsic rewards as the three top triggers towards entrepreneurial intention. Independence/autonomy and capital were also regarded as triggers to entrepreneurial intentions. The barriers to youth entrepreneurship included lack of capital, skill and support as well as lack of market opportunities and risk. The study recommends that in order to encourage youth entrepreneurial intentions, government and all stakeholders should ensure that all the perceived triggers are made available. In addition, the barriers to youth entrepreneurship should be minimised. , Thesis (MCom) -- Faculty of Management and Commerce, 2011
- Full Text:
- Date Issued: 2011
- Authors: Chindoga, Lynety
- Date: 2011
- Subjects: Youth development -- South Africa , Entrepreneurship -- South Africa -- Eastern Cape , Young adults -- Employment -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25948 , vital:64636
- Description: To realise the dream of the African Renaissance and a better life for all South Africans, the entrepreneurial energies of all people, including children, should be harnessed to contribute towards economic development, job creation and poverty alleviation. Entrepreneurship creates wealth and results in economic prosperity for a country. However, in South Africa, entrepreneurship still remains a dream yet to be realised. This is supported by the findings of Maas and Herrington (2006), who identified entrepreneurial activity in South Africa to be very weak as evidenced by a low Total Entrepreneurial Activity (TEA) rate. Youths are not engaging in entrepreneurial activity and are making the bulk of the unemployed in South Africa. The primary objective of this study was to investigate the perceived triggers and barriers to youth entrepreneurship in South Africa. Two sets of questionnaires were self- administered to high school students and university students. The respondents which consisted of three hundred and twenty three university students and two hundred and fifty six high school students, were selected using simple random sampling method. Five point Likert scale was used to measure the responses. Descriptive as well as inferential statistics were used to analyse the data. The results indicated that youth entrepreneurial intention is low in South Africa. The results also indicated that students perceived mainly extrinsic rewards, market opportunities as well as intrinsic rewards as the three top triggers towards entrepreneurial intention. Independence/autonomy and capital were also regarded as triggers to entrepreneurial intentions. The barriers to youth entrepreneurship included lack of capital, skill and support as well as lack of market opportunities and risk. The study recommends that in order to encourage youth entrepreneurial intentions, government and all stakeholders should ensure that all the perceived triggers are made available. In addition, the barriers to youth entrepreneurship should be minimised. , Thesis (MCom) -- Faculty of Management and Commerce, 2011
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- Date Issued: 2011
An organisation development intervention in an Anglican church theological seminary in Southern Africa
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text:
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text: