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Phototransformation of pollutants using lutetium and zinc phthalocyanines anchored on electrospun polymer fibers

  • Authors: Zugle, Ruphino
  • Date: 2013
  • Subjects: Electrospinning Phthalocyanines Lutetium Zinc Polymers Dysprosium Pollutants Air Pollution Photochemistry
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4286 , http://hdl.handle.net/10962/d1002962
  • Description: Novel lanthanide phthalocyanines containing dysprosium, erbium and lutetium as central metals were synthesized using phthalonitrile:metal salt ratio of 4:1 or lower phthalonitrile content as well as using unmetallated phthalocyanine. They were characterized using various spectroscopic and elemental analyses. Dysprosium bis-phthalocyanine was obtained while monomers were obtained for erbium and lutetium phthalocyanines. Theopen-shelldysprosiumbis-phthalocyanine and the monomeric complex of the open-shell erbium were neither fluorescent nor showed the ability to generate singlet oxygen. The triplet states of all the lutetium phthalocyanines were found to be populated with high triplet quantum yields and corresponding high singlet oxygen quantum yields. The fluorescence quantum yields of the lutetium phthalocyanines were however found to be very low. The lutetium phthalocyanines together with unsubstituted zinc phthalocyanine and its derivatives were successfully incorporated into electrospun polymer fibers either by covalent linkage or sorption forces. Spectral characteristics of the functionalized electrospun polymer fibers indicated that the phthalocyanines were bound and their integrity maintained within the fiber matrices. Most importantly the fluorescence and photoactivity of the phthalocyanines were equally maintained within the electrospun fibers. The functionalized electrospun polymer fibers especially those containing the zinc phthalocyanines could qualitatively detect nitrogen dioxide, a known environmental air pollutant. Also all the functionalized electrospun polystyrene and polysulfone fibers containing lutetium and zinc phthalocyanines could be applied for the photoconversion of 4-chlorophenol, 4-nitrophenol and methyl orange. Those of polystyrene could be re-used. Polyacrylic acid and polyurethane functionalized electrospun fibers were found not to be suitable for photocatalytic applications in aqueous medium. 4-Chlorophenol was found to be more susceptible to photodegradation while methyl orange very difficult to degrade.
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  • Date Issued: 2013

Female education breaks the cycle of poverty : a case study of Chikomba rural district, Zimbabwe

  • Authors: Zulu, Lilly Tendai
  • Date: 2013
  • Subjects: Women in development -- Zimbabwe , Women -- Education -- Zimbabwe , Rural women -- Employment -- Zimbabwe , Women in economic development -- Zimbabwe
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9139 , http://hdl.handle.net/10948/d1018691
  • Description: The research which forms the basis of this thesis describes rural women’s perceptions of how Camfed education and skills development programmes have improved their lives in the Chikomba rural district in Chivhu, Zimbabwe. The researcher was motivated to carry out this study mainly due to the fact that in most rural societies in Zimbabwe, women are found suffering from social, cultural and political biases in the traditional male dominated society of Zimbabwe. Compared to their male counterparts, women have limited access to educational and employment opportunities and also have less social and political power than men. Being heads of households, women have to carry out the full traditional roles with the added responsibility of household and production management. The purpose of this study was to inform those investing and interested in women’s education about whether, how and the conditions under which women’s education directly improves women’s own lives and decreases poverty in the family and society. Camfed is an organization that advocates for female education particularly in the marginalized and poor parts of the country where poverty remains a barrier to girl’s education. It provides financial resources and establishes innovative education and training programs in order to break the poverty cycle in rural communities and empower women. A quantitative approach was employed in this study using a descriptive survey design, with the emphasis on collecting primary data from the research participants as well as consulting secondary data sources such as books, academic journals, completed and unpublished post-graduate research dissertations and theses. Findings of this study revealed that financial constraints, early marriage, proximity to school, death of parents as well as domestic chores were factors identified by the women that prevented them from completing school and pursuing further studies. The women also describe their perceptions of how education has led to better opportunities and an improved standard of living as they can now afford the basic goods and services. Moreover the participants mentioned how education has provided them with the basic skills to pursue a livelihood which will enable them to enjoy a decent standard of living. The research also found that education is an important determinant of women’s decision making in terms of finances and thereby improves their sense of empowerment. The women talked extensively about how education has raised their self-esteem and how it has enhanced their economic and social independence. At the end of the study and using the acquired information, several recommendations are made for the expansion and increase of programmes that offer incentives to keep girls in school, especially at secondary level where returns for girls are substantially greater in-terms of reducing poverty and improving the wellbeing of individuals.
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  • Date Issued: 2013

An appraisal of the South African government macroeconomic policies and strategies (1994-2012)

  • Authors: Zuma, Siziwe Monica
  • Date: 2013
  • Subjects: Fiscal policy--South Africa Macroeconomics Monetary policy--South Africa
  • Language: English
  • Type: Thesis , Masters , Public Administration
  • Identifier: http://hdl.handle.net/10353/17360 , vital:40959
  • Description: This study sought to do an overview and the role of Public Administration both as an academic discipline and as a discipline in practice. It sought to do a literature analysis of the macroeconomic policies and strategies that the democratic from 1994- 2012 particularly with regards to lowering unemployment and meeting public needs. The literature review on the Freedom Charter and the South African democratic government’s macroeconomic policies namely the RDP, GEAR, ASGISA, New Growth Plan, and the National Development Plan were studied in great detail in this study. Public Finance in terms of the tax revenues collected and public debt servicing costs have contributed to the capacity of the SA government to meet its public needs and social needs including poverty eradication. It identified that the NDP because of its longer term plan approach its goals could be realizable. It identified that the South African democratic government macroeconomic policy has been consistent since 1994 that of belt tightening or fiscal policy that is tight on fiscal spending and monetary policy also has remained the same although different names have been used over the period 1994-2012. The South African democratic government since 1994 has been pursuing austere fiscal policy. This is because it inherited a government that had high public debt and therefore had to prioritise of servicing that debt. That meant that there has been less funds available to spend on public needs as the aspirations of the people when they drafted and adopted in a congress of the ANC the freedom charter in 1955. The South African democratic government through its macroeconomic policy has created a number of positive changes in the country economically and socially that have benefited a lot of the previously marginalized people of South Africa however the macroeconomic objectives of reducing unemployment, growing the economy, increasing exports and lowering inflation still remain a huge challenge in this country. This study concludes that in order to increase revenues to meet public needs government needs to look at increasing its revenue base rather than borrowing the money as that will create the same challenge that it is currently facing hence it adopted the austere fiscal policy.
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  • Date Issued: 2013

An appraisal of the South African Government Macroeconomic Policies and Strategies (1994-2012)

  • Authors: Zuma, Siziwe Monica
  • Date: 2013
  • Language: English
  • Type: Thesis , Masters , MPA
  • Identifier: vital:11687 , http://hdl.handle.net/10353/d1013582
  • Description: This study sought to do an overview and the role of Public Administration both as an academic discipline and as a discipline in practice. It sought to do a literature analysis of the macroeconomic policies and strategies that the democratic from 1994- 2012 particularly with regards to lowering unemployment and meeting public needs. The literature review on the Freedom Charter and the South African democratic government’s macroeconomic policies namely the RDP, GEAR, ASGISA, New Growth Plan, and the National Development Plan were studied in great detail in this study. Public Finance in terms of the tax revenues collected and public debt servicing costs have contributed to the capacity of the SA government to meet its public needs and social needs including poverty eradication. It identified that the NDP because of its longer term plan approach its goals could be realizable. It identified that the South African democratic government macroeconomic policy has been consistent since 1994 that of belt tightening or fiscal policy that is tight on fiscal spending and monetary policy also has remained the same although different names have been used over the period 1994-2012. The South African democratic government since 1994 has been pursuing austere fiscal policy. This is because it inherited a government that had high public debt and therefore had to prioritise of servicing that debt. That meant that there has been less funds available to spend on public needs as the aspirations of the people when they drafted and adopted in a congress of the ANC the freedom charter in 1955. The South African democratic government through its macroeconomic policy has created a number of positive changes in the country economically and socially that have benefited a lot of the previously marginalized people of South Africa however the macroeconomic objectives of reducing unemployment, growing the economy, increasing exports and lowering inflation still remain a huge challenge in this country. This study concludes that in order to increase revenues to meet public needs government needs to look at increasing its revenue base rather than borrowing the money as that will create the same challenge that it is currently facing hence it adopted the austere fiscal policy.
  • Full Text:
  • Date Issued: 2013

The influence of individual employee performance metrics on a sub-culture in a professional services firm in Durban, South Africa

  • Authors: Zvarevashe, Marshall
  • Date: 2013
  • Subjects: Performance -- Evaluation Corporate culture -- South Africa Organizational effectiveness Leadership Management -- South Africa Organizational behavior -- South Africa
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:714 , http://hdl.handle.net/10962/d1001868
  • Description: In today’s fast paced and global economy, competitive advantage is increasingly focused more on organisational behaviours rather than on the traditional tenets of land, labour and capital. Going beyond the traditional, organisations that are best able to get the most and the best out of their people are the ones most likely to perform better. This study aims to build an understanding of how culture is influenced by individual employee performance metrics that are used in an organisation. Previous research has been done in the broad fields of organisational culture and employee performance metrics separately, but no studies were identified in literature that focused on the interaction of the two concepts specifically. Therefore, this study seeks to answer the following research question: How do individual employee performance metrics influence sub-culture in the context of a professional services firm in Durban? This study predominantly focused not on performance at the organisational level, but rather the more granular level of individual employee performance metrics and sub-culture in one of the divisions of a professional services firm. This qualitative study explores the multiple perspectives of reality of ten of the 32 managers in the Advisory division of a professional services organisation, regarding how individual employee performance metrics influence their world view of work, or the way they perceive, think, feel and interact in the world of work. The focus of the study was limited to one department, in one branch of a multinational organisation and focused only on the horizontal layer of the “manager group” within the staff levels. Semi-structured, in-depth and face-to-face interviews were conducted with these managers as a means of gathering and saturating data. Interviewees were identified using a stratified sampling from the group of managers in the Advisory division. Open coding and constant comparison was used to analyse data. Page ii of viii The results of the study show that managers had very varied and complex perceptions of how the individual performance metrics used to assess their performance influence the sub-culture of their world of work. The key findings manifested that misuse and abuse of performance metrics by leaders, leadership bias in respect to recognition, reward and remunerations, the predominant focus of the division on the bottom line and emphasis on success at all cost, and low employee morale were all aspects of performance that impacted on how employees behaved in the division. The effect of these factors on the managers operating in this division was that there were low levels of employee commitment which were experienced through low morale and reduced productivity; managers felt that there was a restriction in the development of their careers, all of which resulted in a disregard to values of the organisation. This study reflects how the reward and recognition system using the balanced scorecard has shifted the focus of the department away from the organisation’s espoused values. This has resulted in various leadership and management questions for the leadership of the division in this study. This research also adds to existing literature that links performance and culture within the organisational context that it goes beyond the prevalent themes in literature which focus on performance at the organisation level. This study focuses on performance at the employee level and in particular in a professional services firm in South Africa. The study has three interrelated sections which are however considered as standalone. The first section is an evaluation report based on the Advisory division of a professional services firm in Durban, South Africa, and consists of a literature review, the methodology followed in conducting the study, results and the discussion thereof. The report also highlights limitations of the study, recommendations and the perceived value of the study. The report ends with a summary in the form of a conclusion. Section 2 comprises a more comprehensive literature review while Section 3 documents the research methodology followed in the study.
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  • Date Issued: 2013

Anniversary Bulletin 1943-2013: 70 Years of Struggle... and the Struggle Continues

Prof Nyokong wins NRF Lifetime Achievement Award

  • Date: 2013
  • Subjects: Nyokong, Tebello
  • Language: English
  • Type: Article , text
  • Identifier: vital:7215 , http://hdl.handle.net/10962/d1006511 , Nyokong, Tebello
  • Description: Professor Tebello Nyokong of Rhodes University was presented with the Lifetime Achievement Award at this year’s NRF Awards, held in Port Elizabeth, 2013. She is currently a Distinguished Professor of Chemistry at Rhodes University and holder of the DST-NRF Research Chair in Medicinal Chemistry and Nanotechnology, as well as Director of the DST-Mintek Nanotechnology Innovation Centre focussing on sensors.
  • Full Text:
  • Date Issued: 2013
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