The effect of GH family affiliations of mannanolytic enzymes on their synergistic associations during the hydrolysis of mannan-containing substrates
- Authors: Malgas, Samkelo
- Date: 2015
- Subjects: Lignocellulose , Biomass energy , Ethanol as fuel , Polysaccharides , Sugar -- Inversion , Glycosidases , Galactoglucomannans , Oligosaccharides
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4148 , http://hdl.handle.net/10962/d1017909
- Full Text:
- Authors: Malgas, Samkelo
- Date: 2015
- Subjects: Lignocellulose , Biomass energy , Ethanol as fuel , Polysaccharides , Sugar -- Inversion , Glycosidases , Galactoglucomannans , Oligosaccharides
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4148 , http://hdl.handle.net/10962/d1017909
- Full Text:
The effect of strike action on the value and volatility of the South African Rand
- Authors: Gordon, Ross Patrick
- Date: 2015
- Subjects: Foreign exchange rates -- South Africa , Strikes and lockouts -- South Africa -- Economic aspects , South Africa -- Foreign economic relations , South Africa -- Economic conditions -- 1991- , Rand, South African , Dollar, American
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1124 , http://hdl.handle.net/10962/d1020018
- Description: This study analyses whether the advent of strike action has an effect on the value and volatility of the South African Rand compared with the US Dollar. The literature suggests that strike action can have a significant effect on the exchange rate in terms of either value or volatility, and consequences can result that cause inefficiencies in the economy; inhibiting employment and economic growth. Strike action has become common place in South Africa, with 2012 alone recording 99 strikes, 45 of which were “wildcat” or unprotected strikes. This study uses GARCH and Intervention Analyses to determine what the resulting effects of the strikes might be on the exchange rate. The analysis used ZAR/USD exchange rate data for the period January 2000 to October 2013, and covered 72 of the most significant strikes in terms of lost man-days. The results are mixed, suggesting that the effects of strikes do not always conform to expectations (increased volatility and a depreciation in the Rand), and that outside factors affecting the global economy may have a more significant effect on the exchange rate than strikes on their own.
- Full Text:
- Authors: Gordon, Ross Patrick
- Date: 2015
- Subjects: Foreign exchange rates -- South Africa , Strikes and lockouts -- South Africa -- Economic aspects , South Africa -- Foreign economic relations , South Africa -- Economic conditions -- 1991- , Rand, South African , Dollar, American
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1124 , http://hdl.handle.net/10962/d1020018
- Description: This study analyses whether the advent of strike action has an effect on the value and volatility of the South African Rand compared with the US Dollar. The literature suggests that strike action can have a significant effect on the exchange rate in terms of either value or volatility, and consequences can result that cause inefficiencies in the economy; inhibiting employment and economic growth. Strike action has become common place in South Africa, with 2012 alone recording 99 strikes, 45 of which were “wildcat” or unprotected strikes. This study uses GARCH and Intervention Analyses to determine what the resulting effects of the strikes might be on the exchange rate. The analysis used ZAR/USD exchange rate data for the period January 2000 to October 2013, and covered 72 of the most significant strikes in terms of lost man-days. The results are mixed, suggesting that the effects of strikes do not always conform to expectations (increased volatility and a depreciation in the Rand), and that outside factors affecting the global economy may have a more significant effect on the exchange rate than strikes on their own.
- Full Text:
The effects of dietary soya and crystalline phytoestrogens on the growth, gonad development and histology of farmed abalone, Haliotis midae
- Wu, Yu
- Authors: Wu, Yu
- Date: 2015
- Subjects: Haliotis midae , Haliotis midae -- Feeding and feeds , Haliotis midae -- Growth , Haliotis midae -- Histology , Haliotis midae -- Effect of chemicals on , Soybean as feed , Phytoestrogens
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5380 , http://hdl.handle.net/10962/d1017225
- Description: The inclusion of soya as a dietary protein source in the formulated feed, Abfeed® S34 (Marifeed Pty (Ltd), Hermanus) for farmed abalone, Haliotis midae has resulted in larger gonads during reproductive seasons compared to the gonads of abalone fed kelp or diets that included fishmeal as the only main protein source. The aim of this study was to determine if the isoflavones present in the soya were responsible for this increase in gonad size and the subsequent effects on farmed abalone growth. Animals weighing between 40-50 g were fed one of seven isonitrogenous and isoenergetic diets containing either 0, 25, 50 or 100 percent of the soya component of the commercial feed (Abfeed® S34, Marifeed Pty (Ltd), Hermanus) from September 2013 to March 2014. An additional three diets were formulated to include crystalline isoflavone (ISO). These diets were identical to the 0 percent soya diet (i.e. the fishmeal only diet - FM), only ISO was included at the same rate that ISO occurred in the three soya diets. Data were analysed using a multiple forward stepwise regression analysis (MSR) to test the effects of ISO concentration, soya concentration, time, sex, time by concentration interaction and sex by concentration interaction on growth and gonad development and to identify those variables that most contributed to the model. The inclusion of crystalline ISO failed to promote larger gonads and had no effect on abalone growth, while growth and gonad development was dose dependent on soya inclusion rates with sex and time contributing to the models. Mean monthly weight gain in males correlated with increasing soya concentrations (c) (MSR, y = 3.24 + 0.002c, r2 = 0.23, p = 0.03), ranging from 3.11 ± 0.55 g abalone-1 month-1 to 4.43 ± 0.46 g abalone-1 month-1, while both male and female monthly length gain was not influenced by soya concentration with an overall mean of 1.62 ± 0.05 mm abalone-1 month-1 (MSR, p = 0.05 and p = 0.81, respectively). By December, the whole body mass, meat mass and visceral mass in both males and females decreased with increasing soya levels. However, by February, female whole body mass, meat mass and visceral mass positively correlated with soya levels. At the end of the study, male abalone fed FM with soya equivalent to the commercial feed had the highest whole body mass (69.00 ± 2.48 g abalone-1), meat mass (41.80 ± 1.12 g abalone-1), visceral mass (9.00 ± 2.47 g abalone-1) and gonad bulk index (42.70 ± 9.82 g abalone-1), while females were not influenced by soya concentrations with an overall whole body mass of 63.46 ± 0.79 g abalone-1. Weight loss was observed in all treatments between February and March, probably due to a spawning event. The moisture content in the meat was not influenced by treatment, however, visceral water loss was effected by both ISO and soya concentration with time and sex contributing to the model. The visceral water loss of females fed graded levels of soya decreased as a function of soya from December to March, and from December to February for males, whereas females fed ISO-enriched diets decreased as a function of ISO concentration (c) at the end of the study from 74.98 ± 0.88 to 73.10 ± 0.75 percent (MSR, y = 74.97 – 0.0025c, r2 = 0.20, p = 0.048). The inclusion of crystalline ISO had no significant effect on oogenesis in female farmed Haliotis midae, while the distribution of the predominant oocyte stage, stage 7 (second last stage prior to spawning) was dose-dependent in abalone fed increasing soya concentration (c) (MSR, y = 33.38 + 0.03c, r2 = 0.32, F(1, 18) = 8.52, p = 0.01). The increase in stage 7 oocytes in abalone fed FM with soya did not reduce the number of oocytes (44.96 ± 3.01 oocytes mm-2) present within the lumen, while the number of oocytes (o) in abalone fed the FM-only based diets decreased with increasing abundance of stage 7 oocytes (MSR, y = 58.28 – 0.48c, r2 = 0.38, F(1, 18) = 12.51, p = 0.002), possibly due to the increase in size of the oocytes with thicker jelly coats. This study provided evidence that crystalline isoflavone had no influence on abalone gonad development over five months, while soya had a dose-dependent effect on growth, gonad mass and oogenesis in farmed Haliotis midae. Formulated abalone feed could be manipulated at certain times of the year to obtain maximum growth. These implications and further studies were discussed.
- Full Text:
- Authors: Wu, Yu
- Date: 2015
- Subjects: Haliotis midae , Haliotis midae -- Feeding and feeds , Haliotis midae -- Growth , Haliotis midae -- Histology , Haliotis midae -- Effect of chemicals on , Soybean as feed , Phytoestrogens
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5380 , http://hdl.handle.net/10962/d1017225
- Description: The inclusion of soya as a dietary protein source in the formulated feed, Abfeed® S34 (Marifeed Pty (Ltd), Hermanus) for farmed abalone, Haliotis midae has resulted in larger gonads during reproductive seasons compared to the gonads of abalone fed kelp or diets that included fishmeal as the only main protein source. The aim of this study was to determine if the isoflavones present in the soya were responsible for this increase in gonad size and the subsequent effects on farmed abalone growth. Animals weighing between 40-50 g were fed one of seven isonitrogenous and isoenergetic diets containing either 0, 25, 50 or 100 percent of the soya component of the commercial feed (Abfeed® S34, Marifeed Pty (Ltd), Hermanus) from September 2013 to March 2014. An additional three diets were formulated to include crystalline isoflavone (ISO). These diets were identical to the 0 percent soya diet (i.e. the fishmeal only diet - FM), only ISO was included at the same rate that ISO occurred in the three soya diets. Data were analysed using a multiple forward stepwise regression analysis (MSR) to test the effects of ISO concentration, soya concentration, time, sex, time by concentration interaction and sex by concentration interaction on growth and gonad development and to identify those variables that most contributed to the model. The inclusion of crystalline ISO failed to promote larger gonads and had no effect on abalone growth, while growth and gonad development was dose dependent on soya inclusion rates with sex and time contributing to the models. Mean monthly weight gain in males correlated with increasing soya concentrations (c) (MSR, y = 3.24 + 0.002c, r2 = 0.23, p = 0.03), ranging from 3.11 ± 0.55 g abalone-1 month-1 to 4.43 ± 0.46 g abalone-1 month-1, while both male and female monthly length gain was not influenced by soya concentration with an overall mean of 1.62 ± 0.05 mm abalone-1 month-1 (MSR, p = 0.05 and p = 0.81, respectively). By December, the whole body mass, meat mass and visceral mass in both males and females decreased with increasing soya levels. However, by February, female whole body mass, meat mass and visceral mass positively correlated with soya levels. At the end of the study, male abalone fed FM with soya equivalent to the commercial feed had the highest whole body mass (69.00 ± 2.48 g abalone-1), meat mass (41.80 ± 1.12 g abalone-1), visceral mass (9.00 ± 2.47 g abalone-1) and gonad bulk index (42.70 ± 9.82 g abalone-1), while females were not influenced by soya concentrations with an overall whole body mass of 63.46 ± 0.79 g abalone-1. Weight loss was observed in all treatments between February and March, probably due to a spawning event. The moisture content in the meat was not influenced by treatment, however, visceral water loss was effected by both ISO and soya concentration with time and sex contributing to the model. The visceral water loss of females fed graded levels of soya decreased as a function of soya from December to March, and from December to February for males, whereas females fed ISO-enriched diets decreased as a function of ISO concentration (c) at the end of the study from 74.98 ± 0.88 to 73.10 ± 0.75 percent (MSR, y = 74.97 – 0.0025c, r2 = 0.20, p = 0.048). The inclusion of crystalline ISO had no significant effect on oogenesis in female farmed Haliotis midae, while the distribution of the predominant oocyte stage, stage 7 (second last stage prior to spawning) was dose-dependent in abalone fed increasing soya concentration (c) (MSR, y = 33.38 + 0.03c, r2 = 0.32, F(1, 18) = 8.52, p = 0.01). The increase in stage 7 oocytes in abalone fed FM with soya did not reduce the number of oocytes (44.96 ± 3.01 oocytes mm-2) present within the lumen, while the number of oocytes (o) in abalone fed the FM-only based diets decreased with increasing abundance of stage 7 oocytes (MSR, y = 58.28 – 0.48c, r2 = 0.38, F(1, 18) = 12.51, p = 0.002), possibly due to the increase in size of the oocytes with thicker jelly coats. This study provided evidence that crystalline isoflavone had no influence on abalone gonad development over five months, while soya had a dose-dependent effect on growth, gonad mass and oogenesis in farmed Haliotis midae. Formulated abalone feed could be manipulated at certain times of the year to obtain maximum growth. These implications and further studies were discussed.
- Full Text:
The effects of labour law on small firms in South Africa : perceptions of employers in the hospitality sector in Pretoria, Gauteng
- Authors: MacNeill, Jessica Dawn
- Date: 2015
- Subjects: Labor laws and legislation -- South Africa , Small business -- South Africa -- Pretoria , Small business -- South Africa -- Pretoria -- Personnel management , Hospitality industry -- South Africa -- Pretoria -- Personnel management , Manpower policy -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3405 , http://hdl.handle.net/10962/d1018934
- Description: The South African government has attempted to find a balance of interests between the employer and the employee by the introduction of the Labour Relations Act in 1995 and the Basic Conditions of Employment Act in 1997. It is critical to the health of the South African economy that these labour laws do not impact small businesses to the extent that the Gross Domestic Product of the country is negatively affected. There are conflicting reports as to how these labour laws affect small businesses. It is therefore important for government to be able to understand, define and measure the impact of its labour laws on small businesses, in order for it to strategise corrective measures, which may include reconsidering the application of the legislative directive, regulated flexibility, if required. The study was limited in the sense that it was solely based on evidence collected from employers. An interpretivist approach was applied as a research methodology to data collected through in-depth interviews. The main findings of the empirical analysis demonstrate that labour legislation does not heavily impact small firms. It was thus determined that extensive measures were not needed with regard to correcting the framework of regulated flexibility.
- Full Text:
- Authors: MacNeill, Jessica Dawn
- Date: 2015
- Subjects: Labor laws and legislation -- South Africa , Small business -- South Africa -- Pretoria , Small business -- South Africa -- Pretoria -- Personnel management , Hospitality industry -- South Africa -- Pretoria -- Personnel management , Manpower policy -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3405 , http://hdl.handle.net/10962/d1018934
- Description: The South African government has attempted to find a balance of interests between the employer and the employee by the introduction of the Labour Relations Act in 1995 and the Basic Conditions of Employment Act in 1997. It is critical to the health of the South African economy that these labour laws do not impact small businesses to the extent that the Gross Domestic Product of the country is negatively affected. There are conflicting reports as to how these labour laws affect small businesses. It is therefore important for government to be able to understand, define and measure the impact of its labour laws on small businesses, in order for it to strategise corrective measures, which may include reconsidering the application of the legislative directive, regulated flexibility, if required. The study was limited in the sense that it was solely based on evidence collected from employers. An interpretivist approach was applied as a research methodology to data collected through in-depth interviews. The main findings of the empirical analysis demonstrate that labour legislation does not heavily impact small firms. It was thus determined that extensive measures were not needed with regard to correcting the framework of regulated flexibility.
- Full Text:
The enactment of teacher leadership in a township high school : a restricted form
- Authors: Mancoko, Melikhaya Kenneth
- Date: 2015
- Subjects: Educational leadership -- South Africa -- King William's Town , Teacher participation in administration -- South Africa -- King William's Town , School management and organization -- South Africa -- King William's Town , Education, Secondary -- South Africa -- King William's Town
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2060 , http://hdl.handle.net/10962/d1019886
- Description: Whilst the concept of teacher leadership is not new in the international literature (Grant, 2006), research on the topic of teacher leadership is emerging slowly as a new area of research interest in South Africa (Grant, 2006; Grant, 2005; Singh, 2007). Teacher leadership is basically about teachers who are leaders within and outside the classroom, who identify with and contribute to a community of teacher learners and leaders, influence others to improve their teaching practice and accept responsibility for realising the goals of their organisation (Katzenmeyer & Moller, 2001 in Grant, 2006). Therefore, teachers’ roles in operating as leaders in schools are acknowledged in literature. This study is a replication of a University of KwaZulu-Natal multi-case study on the enactment of teacher leadership conducted in various educational institutions in the province of KwaZulu-Natal. In line with the original study, this study aimed at obtaining an understanding of the enactment of teacher leadership in a township high school in the King William’s Town education district, in the Eastern Cape. I further explored what factors promoted or hindered such enactment. As an Eastern Cape Master of Education student participating in a group research programme at Rhodes University, we adopted and used the same research questions, research approach, data collection methods as well as data analysis techniques as utilised in the original study. Therefore, this research study was conducted within the interpretive paradigm, following a qualitative approach. I adopted a case study methodology, with the case being the school and three teacher leaders as units of analysis. Data were gathered through a multi-method approach which consisted of a school profile, a focus group interview, semi-structured individual interviews, questionnaires, self reflective journaling and observations. Whilst the research was guided by distributed leadership theory, Grant’s (2008) Model of teacher leadership and thematic content analysis was used to analyse data. Research findings revealed that the enactment of teacher leadership was evident in Zones 1, 2 and 4 of Grant’s (2008) Model of teacher leadership in the case study school. However, a restricted form of teacher leadership was enacted in Zone 3, whereby teachers were not regularly involved in school-wide decision-making processes. When teacher leadership was enacted, it was in a form of authorised distributed leadership. The study further identified the autocratic leadership style of the principal and of the School Management Team members, as well as the non-inclusive school culture as main barriers towards the enactment of teacher leadership in the case study school. Despite these barriers, teachers’ high levels of enthusiasm were identified as an enabling factor that promoted the enactment of teacher leadership in the case study school.
- Full Text:
- Authors: Mancoko, Melikhaya Kenneth
- Date: 2015
- Subjects: Educational leadership -- South Africa -- King William's Town , Teacher participation in administration -- South Africa -- King William's Town , School management and organization -- South Africa -- King William's Town , Education, Secondary -- South Africa -- King William's Town
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2060 , http://hdl.handle.net/10962/d1019886
- Description: Whilst the concept of teacher leadership is not new in the international literature (Grant, 2006), research on the topic of teacher leadership is emerging slowly as a new area of research interest in South Africa (Grant, 2006; Grant, 2005; Singh, 2007). Teacher leadership is basically about teachers who are leaders within and outside the classroom, who identify with and contribute to a community of teacher learners and leaders, influence others to improve their teaching practice and accept responsibility for realising the goals of their organisation (Katzenmeyer & Moller, 2001 in Grant, 2006). Therefore, teachers’ roles in operating as leaders in schools are acknowledged in literature. This study is a replication of a University of KwaZulu-Natal multi-case study on the enactment of teacher leadership conducted in various educational institutions in the province of KwaZulu-Natal. In line with the original study, this study aimed at obtaining an understanding of the enactment of teacher leadership in a township high school in the King William’s Town education district, in the Eastern Cape. I further explored what factors promoted or hindered such enactment. As an Eastern Cape Master of Education student participating in a group research programme at Rhodes University, we adopted and used the same research questions, research approach, data collection methods as well as data analysis techniques as utilised in the original study. Therefore, this research study was conducted within the interpretive paradigm, following a qualitative approach. I adopted a case study methodology, with the case being the school and three teacher leaders as units of analysis. Data were gathered through a multi-method approach which consisted of a school profile, a focus group interview, semi-structured individual interviews, questionnaires, self reflective journaling and observations. Whilst the research was guided by distributed leadership theory, Grant’s (2008) Model of teacher leadership and thematic content analysis was used to analyse data. Research findings revealed that the enactment of teacher leadership was evident in Zones 1, 2 and 4 of Grant’s (2008) Model of teacher leadership in the case study school. However, a restricted form of teacher leadership was enacted in Zone 3, whereby teachers were not regularly involved in school-wide decision-making processes. When teacher leadership was enacted, it was in a form of authorised distributed leadership. The study further identified the autocratic leadership style of the principal and of the School Management Team members, as well as the non-inclusive school culture as main barriers towards the enactment of teacher leadership in the case study school. Despite these barriers, teachers’ high levels of enthusiasm were identified as an enabling factor that promoted the enactment of teacher leadership in the case study school.
- Full Text:
The experience of single fathers as primary caregivers
- Authors: Naidoo, Raydene
- Date: 2015
- Subjects: Single fathers , Parenthood -- Psychological aspects , Father and child
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3263 , http://hdl.handle.net/10962/d1017886
- Description: Single-parent households are on the increase in our society and especially single-father households where fathers are fulfilling the role of both parents in rearing their children. In this qualitative study, three single fathers who are primary caregivers were interviewed regarding their experience of primary caregiving, adjusting and coping with the transition to primary caregiving and their needs and concerns for their children's future. This study utilised a phenomenological approach to look at single fathers as the best and most informed individuals to explore and describe their lived experiences of being primary caregivers. The rationale for using interpretive phenomenological analysis (IPA) is that it is concerned with individuals' subjective reports and assumes that participants seek to interpret their experiences into some form that is understandable to them. The researcher utilised three semi-structured, in depth, face-to-face interviews as a method of data collection. Each interview focused on eliciting different sets of data, firstly the researcher look at identifying the participants' experience of primary care giving, then moved onto their adjusting and coping with the transition and finally focused on the primary needs and concerns of participants with regards to primary care giving. The sub-themes that emerged from the study include the loss of a partner, shifts in the role the fathers play as parent, dealing with children's reaction to the "loss" of a mother in the home, good parenting: biology vs upbringing, social construction of men and woman, the value of self-care for single fathers, where self-care incorporates both physical and mental care, internal support from family or friends, external support from the community, relationship between fathers and children and sibling relationships. These led to the various super-ordinate themes. The super-ordinate themes and categories that resulted from the analysis of the material include: (1) The transition to being a single-parent and primary caregiver was difficult, (2) Parenting is not biological it is cultural and fathers can fulfil the role, (3) Self-care is important, (4) Support comes from family and friends but social support is rare, (5) Close family relationships are formed
- Full Text:
- Authors: Naidoo, Raydene
- Date: 2015
- Subjects: Single fathers , Parenthood -- Psychological aspects , Father and child
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3263 , http://hdl.handle.net/10962/d1017886
- Description: Single-parent households are on the increase in our society and especially single-father households where fathers are fulfilling the role of both parents in rearing their children. In this qualitative study, three single fathers who are primary caregivers were interviewed regarding their experience of primary caregiving, adjusting and coping with the transition to primary caregiving and their needs and concerns for their children's future. This study utilised a phenomenological approach to look at single fathers as the best and most informed individuals to explore and describe their lived experiences of being primary caregivers. The rationale for using interpretive phenomenological analysis (IPA) is that it is concerned with individuals' subjective reports and assumes that participants seek to interpret their experiences into some form that is understandable to them. The researcher utilised three semi-structured, in depth, face-to-face interviews as a method of data collection. Each interview focused on eliciting different sets of data, firstly the researcher look at identifying the participants' experience of primary care giving, then moved onto their adjusting and coping with the transition and finally focused on the primary needs and concerns of participants with regards to primary care giving. The sub-themes that emerged from the study include the loss of a partner, shifts in the role the fathers play as parent, dealing with children's reaction to the "loss" of a mother in the home, good parenting: biology vs upbringing, social construction of men and woman, the value of self-care for single fathers, where self-care incorporates both physical and mental care, internal support from family or friends, external support from the community, relationship between fathers and children and sibling relationships. These led to the various super-ordinate themes. The super-ordinate themes and categories that resulted from the analysis of the material include: (1) The transition to being a single-parent and primary caregiver was difficult, (2) Parenting is not biological it is cultural and fathers can fulfil the role, (3) Self-care is important, (4) Support comes from family and friends but social support is rare, (5) Close family relationships are formed
- Full Text:
The experiences of isiMpondo speakers in learning standard isiXhosa through the formal education system : an exploratory study at a school in the Bizana district of the Eastern Cape
- Authors: Maqam, Eslinah Zodwa
- Date: 2015
- Subjects: Language and teaching -- South Africa -- Eastern Cape -- Bizana , Native language and education , Language policy -- South Africa -- Eastern Cape -- Bizana
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3652 , http://hdl.handle.net/10962/d1017893
- Description: This study investigates the experiences of isiMpondo speakers in learning standard language through the formal education system. The sociolinguistic factors such as attitudes, language policies and language use in multilingual societies are taken into considerations. The children of non-standard language speakers such as those who speak dialects like isiMpondo have to use another language in their early years in the school system. It is articulated that the isiMpondo that the child brings to the school from the environment is not accommodated simply because it is a non-standard language; whereas the language that is used in the classroom situation is the isiXhosa variety which is a standard one. The research findings show that isiMpondo impacts on learner’s education directly because they lose marks during the course of the year and during examination times if they use it. The study concludes with a recommendation that educators should honour the seven roles of educators by appropriate norms and standards. Some approaches to teaching have been suggested to be used by teachers with regard to inclusivity, as it recognises diversity, and values the following: the uniqueness of the individuals, the experiences, abilities, cultural and language backgrounds of each individual. All in all it seeks to meet the needs of the individual learner by creating a non-discriminatory teaching and learning environment.
- Full Text:
- Authors: Maqam, Eslinah Zodwa
- Date: 2015
- Subjects: Language and teaching -- South Africa -- Eastern Cape -- Bizana , Native language and education , Language policy -- South Africa -- Eastern Cape -- Bizana
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3652 , http://hdl.handle.net/10962/d1017893
- Description: This study investigates the experiences of isiMpondo speakers in learning standard language through the formal education system. The sociolinguistic factors such as attitudes, language policies and language use in multilingual societies are taken into considerations. The children of non-standard language speakers such as those who speak dialects like isiMpondo have to use another language in their early years in the school system. It is articulated that the isiMpondo that the child brings to the school from the environment is not accommodated simply because it is a non-standard language; whereas the language that is used in the classroom situation is the isiXhosa variety which is a standard one. The research findings show that isiMpondo impacts on learner’s education directly because they lose marks during the course of the year and during examination times if they use it. The study concludes with a recommendation that educators should honour the seven roles of educators by appropriate norms and standards. Some approaches to teaching have been suggested to be used by teachers with regard to inclusivity, as it recognises diversity, and values the following: the uniqueness of the individuals, the experiences, abilities, cultural and language backgrounds of each individual. All in all it seeks to meet the needs of the individual learner by creating a non-discriminatory teaching and learning environment.
- Full Text:
The exploration of influence as a leadership competency amongst emerging adult males
- Authors: Munyai, Pfarelo Pardon
- Date: 2015
- Subjects: Leadership , Leadership -- Psychological aspects , Influence (Psychology) , Control (Psychology) , Social media , Executives -- Training of , Executive ability , College students , Young adults , Educational leadership , Executive coaching , Male college students , Leadership -- Study and teaching (Higher) , College student government
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:852 , http://hdl.handle.net/10962/d1017520
- Description: The association between leadership, influence and power is well developed in the literature. However, there is a notable lack of research on youth leadership development, especially as it pertains to their exercise of influence. This paper was borne out of the need to explore how youth - emerging adults’ males in particular - exercise influence as a leadership competency within their voluntary leadership positions. Using semi-structured face-to-face interviews and the Critical Incident Technique (CIT), the research primarily focused on influence tactics and how they were employed. This included assessing the related power bases and principles of influence that were manifest, as well as the learning and development that occurred when reflecting on the outcome of the influence process. Data was analysed using an open coding procedure. Incidents explored in the study were primarily interpersonal in nature. This was reminiscent of lateral influence that characterised the peer to peer contextual environment of the study. The study found that in their influence pursuits, emerging adults followed a rational approach to influence. The distinguishable power bases and their relative importance in application were context dependent (Krause and Kearney, 2006:59-86). In addition, various proactive influence tactics were employed with a leaning towards those perceived as positive, honest and non-manipulative in application, which was congruent with Head Student role expectations and the culture of the organization. The utilization of social media as a communication platform from which various tactics could be launched was a novel and notable finding. Consequently, the results were presented primarily under two themes, exploring how tactics of influence are used face to face and via the social media platform. In addition, the study emphasised the ethical implications of the exercise of influence in both of these platforms and related to this, the challenge of influencing friends or close associates, without undermining leadership integrity. Overall, the various influence incidents presented and their outcomes, evidently shaped leadership development by reinforcing tactics which worked and stimulating continuous reflection and learning, adaptive strategies and the development of new means to deal with resistance and non-compliance. All of these are critical to shaping future influence behaviour. Primary recommendations include the need for a proactive approach to educating youth on leadership and influence through formal programmes, if they were to be empowered with tools to develop and maximize their leadership potential. Equally, practitioners need to be sensitized to the significance of their role as catalysts in nurturing youth leadership development. In addition, the novel use of social media as a leadership influence platform was recognised as significant and as such, a candidate for further research. Beyond the limited scope of this study, other angles worthy of further research include, factoring in elements such as gender, cross-cultural differences and the aspect of voluntary versus incentivised (or paid) leadership positions. The research is presented in an academic paper format, and is structured in three sections. These sections are written up as relatively independent sections, but are complementary in covering the full scope of the research. Section One, which is essentially a paper in a format of an academic journal article, represent the primary section and covers the results of the study, together with discussions and recommendations. This is followed by a literature review (i.e. Section Two), which delves into all the relevant literature explored. Section Three covers the methodology, research design and research procedure pursued. As part of the addendum, a comprehensive summary of the incidents explored is presented. This gives insight into the nature of the various incidents, the influence tactics preferred, power bases and influence principles manifested, together with the outcomes of the incidents. Furthermore, lessons drawn in reflection are noted, which participants viewed as critical, in that they shaped the way they now intend to exercise influence and thereby reflects their personal leadership development.
- Full Text:
- Authors: Munyai, Pfarelo Pardon
- Date: 2015
- Subjects: Leadership , Leadership -- Psychological aspects , Influence (Psychology) , Control (Psychology) , Social media , Executives -- Training of , Executive ability , College students , Young adults , Educational leadership , Executive coaching , Male college students , Leadership -- Study and teaching (Higher) , College student government
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:852 , http://hdl.handle.net/10962/d1017520
- Description: The association between leadership, influence and power is well developed in the literature. However, there is a notable lack of research on youth leadership development, especially as it pertains to their exercise of influence. This paper was borne out of the need to explore how youth - emerging adults’ males in particular - exercise influence as a leadership competency within their voluntary leadership positions. Using semi-structured face-to-face interviews and the Critical Incident Technique (CIT), the research primarily focused on influence tactics and how they were employed. This included assessing the related power bases and principles of influence that were manifest, as well as the learning and development that occurred when reflecting on the outcome of the influence process. Data was analysed using an open coding procedure. Incidents explored in the study were primarily interpersonal in nature. This was reminiscent of lateral influence that characterised the peer to peer contextual environment of the study. The study found that in their influence pursuits, emerging adults followed a rational approach to influence. The distinguishable power bases and their relative importance in application were context dependent (Krause and Kearney, 2006:59-86). In addition, various proactive influence tactics were employed with a leaning towards those perceived as positive, honest and non-manipulative in application, which was congruent with Head Student role expectations and the culture of the organization. The utilization of social media as a communication platform from which various tactics could be launched was a novel and notable finding. Consequently, the results were presented primarily under two themes, exploring how tactics of influence are used face to face and via the social media platform. In addition, the study emphasised the ethical implications of the exercise of influence in both of these platforms and related to this, the challenge of influencing friends or close associates, without undermining leadership integrity. Overall, the various influence incidents presented and their outcomes, evidently shaped leadership development by reinforcing tactics which worked and stimulating continuous reflection and learning, adaptive strategies and the development of new means to deal with resistance and non-compliance. All of these are critical to shaping future influence behaviour. Primary recommendations include the need for a proactive approach to educating youth on leadership and influence through formal programmes, if they were to be empowered with tools to develop and maximize their leadership potential. Equally, practitioners need to be sensitized to the significance of their role as catalysts in nurturing youth leadership development. In addition, the novel use of social media as a leadership influence platform was recognised as significant and as such, a candidate for further research. Beyond the limited scope of this study, other angles worthy of further research include, factoring in elements such as gender, cross-cultural differences and the aspect of voluntary versus incentivised (or paid) leadership positions. The research is presented in an academic paper format, and is structured in three sections. These sections are written up as relatively independent sections, but are complementary in covering the full scope of the research. Section One, which is essentially a paper in a format of an academic journal article, represent the primary section and covers the results of the study, together with discussions and recommendations. This is followed by a literature review (i.e. Section Two), which delves into all the relevant literature explored. Section Three covers the methodology, research design and research procedure pursued. As part of the addendum, a comprehensive summary of the incidents explored is presented. This gives insight into the nature of the various incidents, the influence tactics preferred, power bases and influence principles manifested, together with the outcomes of the incidents. Furthermore, lessons drawn in reflection are noted, which participants viewed as critical, in that they shaped the way they now intend to exercise influence and thereby reflects their personal leadership development.
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The gentle pressure of the sky
- Authors: Watermeyer, Laura
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , South African fiction (English) -- Study and teaching (Higher) , South African poetry (English) -- Study and teaching (Higher) , Creative writing (Higher education) -- South Africa , Short stories, South African -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5996 , http://hdl.handle.net/10962/d1017780
- Description: A collection of lyrical, imaginative prose, ranging from prose poems to more formal short stories to flash fiction. I challenge the ordinary or commonplace by exploring the realms between fiction and poetry, realism and fantasy, reality and illusion. I would like reading the collection to be a sensory experience, one that draws the reader deeper into the imaginary. Stylistically, I work elements of poetic language into the narrative in order to express the mystery and remoteness that the stories require.
- Full Text:
- Authors: Watermeyer, Laura
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , South African fiction (English) -- Study and teaching (Higher) , South African poetry (English) -- Study and teaching (Higher) , Creative writing (Higher education) -- South Africa , Short stories, South African -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5996 , http://hdl.handle.net/10962/d1017780
- Description: A collection of lyrical, imaginative prose, ranging from prose poems to more formal short stories to flash fiction. I challenge the ordinary or commonplace by exploring the realms between fiction and poetry, realism and fantasy, reality and illusion. I would like reading the collection to be a sensory experience, one that draws the reader deeper into the imaginary. Stylistically, I work elements of poetic language into the narrative in order to express the mystery and remoteness that the stories require.
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The impact of internal behavioural decision-making biases on South African collective investment scheme performance
- Authors: Muller, Stacey Leigh
- Date: 2015
- Subjects: Decision making , Investment analysis , Efficient market theory , Consumer behavior , Behavioral assessment , Mutual funds
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1209 , http://hdl.handle.net/10962/d1020308
- Description: Market efficiency, based on people acting rationally, has been the dominating finance theory for most of the 20th and 21st Century’s. This classical finance theory is based on assumptions that people are rational, they absorb all available information and maximise utility. This view is outdated; it has been shown that people are in fact irrational and that this could be the cause of anomalies in the market. Behavioural finance takes into account people, and their natural biases. Behavioural finance has integrated classical financial theories and psychological theories to illustrate the way in which irrational people can impact market efficiency. This research looks at the way collective investment scheme manager decision-making can impact market efficiency. Specifically the behavioural biases: overconfidence, over optimism, loss aversion and frame dependence and whether or not collective investment scheme performance is affected by these. This research was carried out using a questionnaire distributed directly to CIS managers and risk-adjusted returns were used in order to allow for comparative results. The results from the questionnaire show evidence that actively managing South African CIS managers do indeed suffer from overconfidence and loss aversion and they do not appear to suffer from frame dependence or over optimism in this research context. There was also evidence showing that managers who suffer from these biases also demonstrated lower investment returns. “The investor’s chief problem, and even his worst enemy, is likely to be himself.” - Benjamin Graham
- Full Text:
- Authors: Muller, Stacey Leigh
- Date: 2015
- Subjects: Decision making , Investment analysis , Efficient market theory , Consumer behavior , Behavioral assessment , Mutual funds
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1209 , http://hdl.handle.net/10962/d1020308
- Description: Market efficiency, based on people acting rationally, has been the dominating finance theory for most of the 20th and 21st Century’s. This classical finance theory is based on assumptions that people are rational, they absorb all available information and maximise utility. This view is outdated; it has been shown that people are in fact irrational and that this could be the cause of anomalies in the market. Behavioural finance takes into account people, and their natural biases. Behavioural finance has integrated classical financial theories and psychological theories to illustrate the way in which irrational people can impact market efficiency. This research looks at the way collective investment scheme manager decision-making can impact market efficiency. Specifically the behavioural biases: overconfidence, over optimism, loss aversion and frame dependence and whether or not collective investment scheme performance is affected by these. This research was carried out using a questionnaire distributed directly to CIS managers and risk-adjusted returns were used in order to allow for comparative results. The results from the questionnaire show evidence that actively managing South African CIS managers do indeed suffer from overconfidence and loss aversion and they do not appear to suffer from frame dependence or over optimism in this research context. There was also evidence showing that managers who suffer from these biases also demonstrated lower investment returns. “The investor’s chief problem, and even his worst enemy, is likely to be himself.” - Benjamin Graham
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The impact of job redesign on employee job outcomes: the case of the implementation of a private-public partnership model at a hospital
- Authors: Onaga, Chukwuka Moses
- Date: 2015
- Subjects: Eastern Cape (South Africa) -- Department of Health , Hospitals -- Employees , Public-private sector cooperation -- South Africa -- Eastern Cape , Personnel management -- South Africa -- Eastern Cape , Organizational change -- South Africa -- Eastern Cape , Job enrichment -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:853 , http://hdl.handle.net/10962/d1017521
- Description: It has been widely reported that despite high health expenditure and a myriad of policies in place, South Africa’s health outcomes are worse than those in many lower income countries. The adverse health outcomes are even more pronounced in a rural province such as the Eastern Cape Province. Consequently, the Eastern Cape Department of Health (ECDOH) had turned to Private Public Partnerships (PPP) with the hope of mitigating some of the challenges beleaguering the health system in the province. This study evaluated the impact of the implementation of one of the PPP models at an Eastern Cape Hospital on key employee job outcomes. This is crucial as there had not yet, been this type of scientific assessment of the impact of the PPP model since the inception of the PPP about half a decade ago. Theoretical guidance of the study was provided by the Job Characteristics Theory (JCT) of Oldham and Hackman (1975), which predicted that changes in five core characteristics of a job will affect three critical psychological states which will in turn impact on key employee job outcomes. Uniquely, this study veered away from the traditional quantitative approach to the application of the JCT but rather adopted a qualitative case study approach. There is historical evidence that cross cultural validation of a theory in a new setting (a South African PPP hospital in this instance) benefits from an initial qualitative study. Data collection and analysis were guided by the JCT. Primary data collection was by semi-structured, face to face, one on one interviews. The analyses of the data specifically employed pattern matching and explanation building techniques, all underpinned by the JCT. Validity of interview data was strongly contributed to by available relevant case study documents. This study found that indeed, the implementation of this PPP model brought about changes in all five (JCT) core job characteristics of clinical staff, but to varying degrees in the three unique shared service areas. Interestingly, the three psychological states were found to have been impacted upon by changes in the JCT core job characteristics but also by factors related to the context of the job, such as quality of supervision and co-worker relationship. In contrast to the predictions of the JCT, this study also found that the key job outcomes were impacted directly by such contextual factors as the recent availability of specialists and staff shortages, among others. It also emerged that the PPP implementation has directly evoked a perception of inequity and breach of psychological contract among clinical staff working at the shared service areas. Among the three shared areas, the accident and emergency unit was discovered to have had the worst overall impact. Due to the importance of contextual factors at this PPP setting, key recommendations were directed towards improved management of the jobs. It is also recommended that a follow-up quantitative study be commissioned to further explore the main themes that emerged from this study. This research report is presented in three sections. Section 1 is the evaluative report itself, structured as an academic paper. Section 2 expands on the literature that was briefly reviewed in Section 1 while Section 3 outlines, in greater details, the research methods followed during the conduct of the research and the justifications thereof.
- Full Text:
- Authors: Onaga, Chukwuka Moses
- Date: 2015
- Subjects: Eastern Cape (South Africa) -- Department of Health , Hospitals -- Employees , Public-private sector cooperation -- South Africa -- Eastern Cape , Personnel management -- South Africa -- Eastern Cape , Organizational change -- South Africa -- Eastern Cape , Job enrichment -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:853 , http://hdl.handle.net/10962/d1017521
- Description: It has been widely reported that despite high health expenditure and a myriad of policies in place, South Africa’s health outcomes are worse than those in many lower income countries. The adverse health outcomes are even more pronounced in a rural province such as the Eastern Cape Province. Consequently, the Eastern Cape Department of Health (ECDOH) had turned to Private Public Partnerships (PPP) with the hope of mitigating some of the challenges beleaguering the health system in the province. This study evaluated the impact of the implementation of one of the PPP models at an Eastern Cape Hospital on key employee job outcomes. This is crucial as there had not yet, been this type of scientific assessment of the impact of the PPP model since the inception of the PPP about half a decade ago. Theoretical guidance of the study was provided by the Job Characteristics Theory (JCT) of Oldham and Hackman (1975), which predicted that changes in five core characteristics of a job will affect three critical psychological states which will in turn impact on key employee job outcomes. Uniquely, this study veered away from the traditional quantitative approach to the application of the JCT but rather adopted a qualitative case study approach. There is historical evidence that cross cultural validation of a theory in a new setting (a South African PPP hospital in this instance) benefits from an initial qualitative study. Data collection and analysis were guided by the JCT. Primary data collection was by semi-structured, face to face, one on one interviews. The analyses of the data specifically employed pattern matching and explanation building techniques, all underpinned by the JCT. Validity of interview data was strongly contributed to by available relevant case study documents. This study found that indeed, the implementation of this PPP model brought about changes in all five (JCT) core job characteristics of clinical staff, but to varying degrees in the three unique shared service areas. Interestingly, the three psychological states were found to have been impacted upon by changes in the JCT core job characteristics but also by factors related to the context of the job, such as quality of supervision and co-worker relationship. In contrast to the predictions of the JCT, this study also found that the key job outcomes were impacted directly by such contextual factors as the recent availability of specialists and staff shortages, among others. It also emerged that the PPP implementation has directly evoked a perception of inequity and breach of psychological contract among clinical staff working at the shared service areas. Among the three shared areas, the accident and emergency unit was discovered to have had the worst overall impact. Due to the importance of contextual factors at this PPP setting, key recommendations were directed towards improved management of the jobs. It is also recommended that a follow-up quantitative study be commissioned to further explore the main themes that emerged from this study. This research report is presented in three sections. Section 1 is the evaluative report itself, structured as an academic paper. Section 2 expands on the literature that was briefly reviewed in Section 1 while Section 3 outlines, in greater details, the research methods followed during the conduct of the research and the justifications thereof.
- Full Text:
The influence of organisational culture on a high commitment work system and organisational commitment : the case of a Chinese multinational corporation in South Africa
- Authors: Mabuza, Linda Tengetile
- Date: 2015
- Subjects: Corporate culture -- South Africa , Corporate culture -- Cross-cultural studies , International business enterprises -- South Africa , Investments, Chinese -- South Africa , Organizational commitment -- South Africa , Performance -- Management , Host countries (Business) , Personnel management -- South Africa , South Africa -- Foreign economic relations -- China
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1205 , http://hdl.handle.net/10962/d1017768
- Description: Chinese presence in Africa has been rapidly increasing in the past few years and has been speculated to be mainly due to China seeking Africa’s political alliance and access to Africa’s natural resources and growing consumer markets. The growing presence of Chinese organisations in Africa, however, has not been without its challenges. In particular, Chinese multinational corporations (MNCs) in search of consumer markets in Africa have been cited as facing human resource (HR) challenges which may affect their organisational performance. In this regard, literature on human resource management has already established the important role of organisational culture, HR practices and organisational commitment in enabling organisations to achieve superior organisational performance. Given the fact that there is currently little research knowledge of Chinese presence in Africa at the organisational level, this research aimed to contribute empirical knowledge to the growing body of research in this area. Specifically, the main purpose of this research was to examine how the organisational culture of a Chinese MNC’s South African subsidiary has shaped the nature of its high commitment work system (HCWS) and to assess the consequences thereof on organisational commitment. In alignment with the phenomenological paradigm, the research applied a descriptive and explanatory case study methodology in order to generate rich, qualitative data which was required for in-depth descriptions and to uncover the underlying interactions of the researched phenomena at the subsidiary. The selected case for the research was, therefore, a Chinese MNC operating in the personal computer (PC) industry, which had expanded its operations to South Africa in order to reach Africa’s growing consumer markets. In particular, the South African subsidiary served as a PC sales and distribution organisation for the Chinese MNC. There were about 40 employees at the subsidiary who were all South African employees. Semi-structured, in-depth interviews were conducted with twelve employees from different job functions and across different job levels. Data collection was guided by the theoretical frameworks by Cameron and Freeman (1991) for organisational culture and Xiao and Bjorkman (2006) for the HCWS and organisational commitment. The data collected from interviews was then analysed through a qualitative, content analysis process. The findings of the research thus pointed to the market culture as the dominant organisational culture type at the South African subsidiary of the Chinese MNC; characteristics of the adhocracy and clan cultures were also discovered. The externally oriented market culture was found to be the most relevant for the high performance and market leadership aspirations of the subsidiary. The market culture also appears to be the most appropriate organisational culture that would enable the subsidiary to deal with the competitive nature of the PC industry. Furthermore, it was found that certain cultural values emphasised by the Confucian and Ubuntu value systems could have had a part to play in the formation of the subsidiary’s organisational culture. The market culture was also found to have had the greatest influence in shaping the primarily performance oriented HCWS practices. Of the investigated HR practices at the subsidiary, all were found to be consistent with HCWS practices, with the exception of ownership practices and the performance appraisal system. Finally, although there were generally high levels of organisational commitment reported at the subsidiary, other job and organisational context factors besides the HCWS practices were found to be the major contributors to those feelings of organisational commitment. By investigating the organisational culture, HCWS and organisational commitment of a Chinese MNC in South Africa, this research has added to the body of knowledge concerning the growing presence of Chinese organisations in Africa. Based on the empirical findings of this study, several recommendations have been made in an attempt to assist the Chinese MNC manage the organisational commitment of its South African employees towards superior organisational performance.
- Full Text:
- Authors: Mabuza, Linda Tengetile
- Date: 2015
- Subjects: Corporate culture -- South Africa , Corporate culture -- Cross-cultural studies , International business enterprises -- South Africa , Investments, Chinese -- South Africa , Organizational commitment -- South Africa , Performance -- Management , Host countries (Business) , Personnel management -- South Africa , South Africa -- Foreign economic relations -- China
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1205 , http://hdl.handle.net/10962/d1017768
- Description: Chinese presence in Africa has been rapidly increasing in the past few years and has been speculated to be mainly due to China seeking Africa’s political alliance and access to Africa’s natural resources and growing consumer markets. The growing presence of Chinese organisations in Africa, however, has not been without its challenges. In particular, Chinese multinational corporations (MNCs) in search of consumer markets in Africa have been cited as facing human resource (HR) challenges which may affect their organisational performance. In this regard, literature on human resource management has already established the important role of organisational culture, HR practices and organisational commitment in enabling organisations to achieve superior organisational performance. Given the fact that there is currently little research knowledge of Chinese presence in Africa at the organisational level, this research aimed to contribute empirical knowledge to the growing body of research in this area. Specifically, the main purpose of this research was to examine how the organisational culture of a Chinese MNC’s South African subsidiary has shaped the nature of its high commitment work system (HCWS) and to assess the consequences thereof on organisational commitment. In alignment with the phenomenological paradigm, the research applied a descriptive and explanatory case study methodology in order to generate rich, qualitative data which was required for in-depth descriptions and to uncover the underlying interactions of the researched phenomena at the subsidiary. The selected case for the research was, therefore, a Chinese MNC operating in the personal computer (PC) industry, which had expanded its operations to South Africa in order to reach Africa’s growing consumer markets. In particular, the South African subsidiary served as a PC sales and distribution organisation for the Chinese MNC. There were about 40 employees at the subsidiary who were all South African employees. Semi-structured, in-depth interviews were conducted with twelve employees from different job functions and across different job levels. Data collection was guided by the theoretical frameworks by Cameron and Freeman (1991) for organisational culture and Xiao and Bjorkman (2006) for the HCWS and organisational commitment. The data collected from interviews was then analysed through a qualitative, content analysis process. The findings of the research thus pointed to the market culture as the dominant organisational culture type at the South African subsidiary of the Chinese MNC; characteristics of the adhocracy and clan cultures were also discovered. The externally oriented market culture was found to be the most relevant for the high performance and market leadership aspirations of the subsidiary. The market culture also appears to be the most appropriate organisational culture that would enable the subsidiary to deal with the competitive nature of the PC industry. Furthermore, it was found that certain cultural values emphasised by the Confucian and Ubuntu value systems could have had a part to play in the formation of the subsidiary’s organisational culture. The market culture was also found to have had the greatest influence in shaping the primarily performance oriented HCWS practices. Of the investigated HR practices at the subsidiary, all were found to be consistent with HCWS practices, with the exception of ownership practices and the performance appraisal system. Finally, although there were generally high levels of organisational commitment reported at the subsidiary, other job and organisational context factors besides the HCWS practices were found to be the major contributors to those feelings of organisational commitment. By investigating the organisational culture, HCWS and organisational commitment of a Chinese MNC in South Africa, this research has added to the body of knowledge concerning the growing presence of Chinese organisations in Africa. Based on the empirical findings of this study, several recommendations have been made in an attempt to assist the Chinese MNC manage the organisational commitment of its South African employees towards superior organisational performance.
- Full Text:
The influence of the physical environment, topography and time on the inshore distribution of invertebrate larvae : a multi-taxon approach
- Authors: Duna, Oliver Olwethu
- Date: 2015
- Subjects: Benthic animals -- Larvae , Benthic animals -- Ecology , Plankton -- Larvae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5926 , http://hdl.handle.net/10962/d1017804
- Description: Coastal hydrodynamics regulate population dynamics through the distribution and dispersal of the meroplankton of many benthic invertebrates. I examined the hydrodynamics at four different sites on the south-east coast of South Africa and coupled them with larval sampling done at high temporal and spatial resolution. Day and night sampling was done at all four sites and a continuous 24 hour study was done in one site, both forms of sampling were carried out in autumn and spring. Samples were taken at two stations, 900 metres offshore and 300 metres apart, within each site. Water properties measured were depth, temperature and current velocity and direction. Plankton samples were collected using a plankton pump at various depths, from the surface, bottom and either side of the thermocline when present. A wide range of taxa (mostly bryozoans, bivalves, barnacles and decapods) was examined. 2-way ANOVAs were used to test the effects of time and depth on each taxon. In addition, multiple regression analyses were performed on each taxon to investigate the effects of hydrodynamics on the distribution of larvae. Bryozoanlarvae proved to be positively phototactic whilst bivalve veligers, barnacle larvae and decapod zoeae performed diel vertical migration. Turbulence and temperature had an effect on the vertical distribution/migration of decapod zoeae. These results highlight the role of taxon-specific responses to flow and the potential differential effects on larval retention and ultimately connectivity of benthic populations.
- Full Text:
- Authors: Duna, Oliver Olwethu
- Date: 2015
- Subjects: Benthic animals -- Larvae , Benthic animals -- Ecology , Plankton -- Larvae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5926 , http://hdl.handle.net/10962/d1017804
- Description: Coastal hydrodynamics regulate population dynamics through the distribution and dispersal of the meroplankton of many benthic invertebrates. I examined the hydrodynamics at four different sites on the south-east coast of South Africa and coupled them with larval sampling done at high temporal and spatial resolution. Day and night sampling was done at all four sites and a continuous 24 hour study was done in one site, both forms of sampling were carried out in autumn and spring. Samples were taken at two stations, 900 metres offshore and 300 metres apart, within each site. Water properties measured were depth, temperature and current velocity and direction. Plankton samples were collected using a plankton pump at various depths, from the surface, bottom and either side of the thermocline when present. A wide range of taxa (mostly bryozoans, bivalves, barnacles and decapods) was examined. 2-way ANOVAs were used to test the effects of time and depth on each taxon. In addition, multiple regression analyses were performed on each taxon to investigate the effects of hydrodynamics on the distribution of larvae. Bryozoanlarvae proved to be positively phototactic whilst bivalve veligers, barnacle larvae and decapod zoeae performed diel vertical migration. Turbulence and temperature had an effect on the vertical distribution/migration of decapod zoeae. These results highlight the role of taxon-specific responses to flow and the potential differential effects on larval retention and ultimately connectivity of benthic populations.
- Full Text:
The interrelationships between foreign direct investment and economic growth in Africa
- Authors: Bolani, Lindelwa Mandisa
- Date: 2015
- Subjects: Investments, Foreign -- Africa , Economic development -- Africa , Africa -- Economic conditions -- 1960- , Africa -- Foreign economic relations , Gross domestic product -- Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1123 , http://hdl.handle.net/10962/d1019885
- Description: There has been a long search for the keys to development and economic growth in Africa. This study investigates the relationship between FDI and economic growth over the period 2000-2012 using data from 48 African countries. On the aggregate regional level FDI and economic growth were found to be positively correlated during this period. Using panel data econometric techniques and the Panel Granger Causality test, results revealed that a bi-directional causality relationship existed between FDI and GDP. Thus, the results suggest that GDP is a requirement for increased investment, and at the same time is the result of increased foreign investment. Thus, the conclusion is that African policy makers are justified in increasing their attempts to create an attractive business environment for foreign investors, as it is beneficial for economic growth.
- Full Text:
- Authors: Bolani, Lindelwa Mandisa
- Date: 2015
- Subjects: Investments, Foreign -- Africa , Economic development -- Africa , Africa -- Economic conditions -- 1960- , Africa -- Foreign economic relations , Gross domestic product -- Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1123 , http://hdl.handle.net/10962/d1019885
- Description: There has been a long search for the keys to development and economic growth in Africa. This study investigates the relationship between FDI and economic growth over the period 2000-2012 using data from 48 African countries. On the aggregate regional level FDI and economic growth were found to be positively correlated during this period. Using panel data econometric techniques and the Panel Granger Causality test, results revealed that a bi-directional causality relationship existed between FDI and GDP. Thus, the results suggest that GDP is a requirement for increased investment, and at the same time is the result of increased foreign investment. Thus, the conclusion is that African policy makers are justified in increasing their attempts to create an attractive business environment for foreign investors, as it is beneficial for economic growth.
- Full Text:
The isolation, characterisation and chemotaxonomic significance of secondary metabolites from selected South African Laurencia spp. Rhodophyta
- Authors: Fakee, Jameel
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/64696 , vital:28593
- Description: Bioprospection of marine organisms as a potential source for lead drugs is becoming increasingly popular. The secondary metabolome of these organisms consists of structurally diverse molecules possessing unprecedented carbon skeletons, the biosynthesis of which occurs via complex metabolomic pathways driven by specialist enzymes. This structural novelty is highly influential on the favourable bioactivity these compounds display. A prominent example of such a compound is trabectedin marketed as Yondelis®. Registered for the treatment of soft tissue sarcomas, this marine drug was developed from extracts of the tunicate Ecteinascidia turbinata. South Africa is renowned for possessing a highly diverse marine biota including several endemic species of marine red algae belonging to the Laurencia sensu stricto genus, which falls within the Laurencia complex. Despite having a good reputation for fascinating secondary metabolites, the taxonomy of Laurencia natural products is proving challenging for reasons including the presence of cryptic species, as well as individual species displaying morphological variability. The aim of this study was thus to isolate secondary metabolites from various South African Laurencia spp. and subsequently assess their chemotaxonomic significance by analysis of a parallel plastid rbcL phylogeny study of Laurencia spp. This study reports the first phycochemical investigation into Laurencia natalensis Kylin, Laurencia cf. corymbosa J.Agardh, Laurencia complanata (Suhr) Kützing, Laurencia sodwaniensis Francis, Bolton, Mattio and Anderson submitted, Laurencia multiclavata Francis, Bolton, Mattio and Anderson submitted, and a South African specimen of Laurenciella marilzae Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano and M.T. Fujii (basionym: Laurencia marilzae) originally described from Spain. Additionally, the chemical profiles of previously explored species Laurencia flexuosa Kützing and Laurencia glomerata Kützing were re-investigated. The organic extracts of the above species afforded 31 compounds belonging to a wide array of structural classes including halo-chamigranes, linear C15 acetogenins, indole alkaloids, cuparanes and cyclic bromo-ethers. A new tri-cyclic keto-cuparane (4.4) was isolated from L.cf. corymbosa alongside the new cuparanes 4.1 and 4.7. Algoane (5.9), a unique marker compound isolated from L. natalensis, was previously only reported from a sea-hare. Such marker compounds which are exclusive to an individual algal species increase the ease of their subsequent identification. The feasibility of chemotaxonomy as an additional tool to classify Laurencia spp. Was established as broad predictions of a specimen’s phylogeny, based on representatives of its secondary metabolome, proved viable. The study specimens were shown to possess similar chemical profiles to their sister species e.g. L. complanata, L. sodwaniensis and L. multiclavata produced similar metabolites to their sister species as inferred by an rbcL phylogeny tree. Finally, a 1H NMR profiling study on the crude organic extracts of various Laurencia spp. generated distinctive, reproducible spectra, exposing the value of NMR spectroscopy as a rudimentary species discernment tool.
- Full Text:
- Authors: Fakee, Jameel
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/64696 , vital:28593
- Description: Bioprospection of marine organisms as a potential source for lead drugs is becoming increasingly popular. The secondary metabolome of these organisms consists of structurally diverse molecules possessing unprecedented carbon skeletons, the biosynthesis of which occurs via complex metabolomic pathways driven by specialist enzymes. This structural novelty is highly influential on the favourable bioactivity these compounds display. A prominent example of such a compound is trabectedin marketed as Yondelis®. Registered for the treatment of soft tissue sarcomas, this marine drug was developed from extracts of the tunicate Ecteinascidia turbinata. South Africa is renowned for possessing a highly diverse marine biota including several endemic species of marine red algae belonging to the Laurencia sensu stricto genus, which falls within the Laurencia complex. Despite having a good reputation for fascinating secondary metabolites, the taxonomy of Laurencia natural products is proving challenging for reasons including the presence of cryptic species, as well as individual species displaying morphological variability. The aim of this study was thus to isolate secondary metabolites from various South African Laurencia spp. and subsequently assess their chemotaxonomic significance by analysis of a parallel plastid rbcL phylogeny study of Laurencia spp. This study reports the first phycochemical investigation into Laurencia natalensis Kylin, Laurencia cf. corymbosa J.Agardh, Laurencia complanata (Suhr) Kützing, Laurencia sodwaniensis Francis, Bolton, Mattio and Anderson submitted, Laurencia multiclavata Francis, Bolton, Mattio and Anderson submitted, and a South African specimen of Laurenciella marilzae Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano and M.T. Fujii (basionym: Laurencia marilzae) originally described from Spain. Additionally, the chemical profiles of previously explored species Laurencia flexuosa Kützing and Laurencia glomerata Kützing were re-investigated. The organic extracts of the above species afforded 31 compounds belonging to a wide array of structural classes including halo-chamigranes, linear C15 acetogenins, indole alkaloids, cuparanes and cyclic bromo-ethers. A new tri-cyclic keto-cuparane (4.4) was isolated from L.cf. corymbosa alongside the new cuparanes 4.1 and 4.7. Algoane (5.9), a unique marker compound isolated from L. natalensis, was previously only reported from a sea-hare. Such marker compounds which are exclusive to an individual algal species increase the ease of their subsequent identification. The feasibility of chemotaxonomy as an additional tool to classify Laurencia spp. Was established as broad predictions of a specimen’s phylogeny, based on representatives of its secondary metabolome, proved viable. The study specimens were shown to possess similar chemical profiles to their sister species e.g. L. complanata, L. sodwaniensis and L. multiclavata produced similar metabolites to their sister species as inferred by an rbcL phylogeny tree. Finally, a 1H NMR profiling study on the crude organic extracts of various Laurencia spp. generated distinctive, reproducible spectra, exposing the value of NMR spectroscopy as a rudimentary species discernment tool.
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The isolation, genetic characterisation and biological activity of a South African Phthorimaea operculella granulovirus (PhopGV-SA) for the control of the Potato Tuber Moth, Phthorimaea operculella (Zeller)
- Authors: Jukes, Michael David
- Date: 2015
- Subjects: Potato tuberworm , Potatoes -- Diseases and pests -- South Africa , Baculoviruses , Natural pesticides , Biological pest control agents , Potato tuberworm -- Biological control , Restriction enzymes, DNA
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4147 , http://hdl.handle.net/10962/d1017908
- Description: The potato tuber moth, Phthorimaea operculella (Zeller), is a major pest of potato crops worldwide causing significant damage to both field and stored tubers. The current control method in South Africa involves chemical insecticides, however, there is growing concern on the health and environmental risks of their use. The development of novel biopesticide based control methods may offer a potential solution for the future of insecticides. In this study a baculovirus was successfully isolated from a laboratory population of P. operculella. Transmission electron micrographs revealed granulovirus-like particles. DNA was extracted from recovered occlusion bodies and used for the PCR amplification of the lef-8, lef-9, granulin and egt genes. Sequence data was obtained and submitted to BLAST identifying the virus as a South African isolate of Phthorimaea operculella granulovirus (PhopGV-SA). Phylogenetic analysis of the lef-8, lef-9 and granulin amino acid sequences grouped the South African isolate with PhopGV-1346. Comparison of egt sequence data identified PhopGV-SA as a type II egt gene. A phylogenetic analysis of egt amino acid sequences grouped all type II genes, including PhopGV-SA, into a separate clade from types I, III, IV and V. These findings suggest that type II may represent the prototype structure for this gene with the evolution of types I, III and IV a result of large internal deletion events and subsequent divergence. PhopGV-SA was also shown to be genetically more similar to South American isolates (i.e. PhopGV-CHI or PhopGV-INDO) than it is to other African isolates, suggesting that the South African isolate originated from South America. Restriction endonuclease profiles of PhopGV-SA were similar to those of PhopGV-1346 and PhopGV-JLZ9f for the enzymes BamHI, HindIII, NruI and NdeI. A preliminary full genome sequence for PhopGV-SA was determined and compared to PhopGV-136 with some gene variation observed (i.e. odv-e66 and vp91/p95). The biological activity of PhopGV-SA against P. operculella neonate larvae was evaluated with an estimated LC₅₀ of 1.87×10⁸ OBs.ml⁻¹ being determined. This study therefore reports the characterisation of a novel South African PhopGV isolate which could potentially be developed into a biopesticide for the control of P. operculella.
- Full Text:
- Authors: Jukes, Michael David
- Date: 2015
- Subjects: Potato tuberworm , Potatoes -- Diseases and pests -- South Africa , Baculoviruses , Natural pesticides , Biological pest control agents , Potato tuberworm -- Biological control , Restriction enzymes, DNA
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4147 , http://hdl.handle.net/10962/d1017908
- Description: The potato tuber moth, Phthorimaea operculella (Zeller), is a major pest of potato crops worldwide causing significant damage to both field and stored tubers. The current control method in South Africa involves chemical insecticides, however, there is growing concern on the health and environmental risks of their use. The development of novel biopesticide based control methods may offer a potential solution for the future of insecticides. In this study a baculovirus was successfully isolated from a laboratory population of P. operculella. Transmission electron micrographs revealed granulovirus-like particles. DNA was extracted from recovered occlusion bodies and used for the PCR amplification of the lef-8, lef-9, granulin and egt genes. Sequence data was obtained and submitted to BLAST identifying the virus as a South African isolate of Phthorimaea operculella granulovirus (PhopGV-SA). Phylogenetic analysis of the lef-8, lef-9 and granulin amino acid sequences grouped the South African isolate with PhopGV-1346. Comparison of egt sequence data identified PhopGV-SA as a type II egt gene. A phylogenetic analysis of egt amino acid sequences grouped all type II genes, including PhopGV-SA, into a separate clade from types I, III, IV and V. These findings suggest that type II may represent the prototype structure for this gene with the evolution of types I, III and IV a result of large internal deletion events and subsequent divergence. PhopGV-SA was also shown to be genetically more similar to South American isolates (i.e. PhopGV-CHI or PhopGV-INDO) than it is to other African isolates, suggesting that the South African isolate originated from South America. Restriction endonuclease profiles of PhopGV-SA were similar to those of PhopGV-1346 and PhopGV-JLZ9f for the enzymes BamHI, HindIII, NruI and NdeI. A preliminary full genome sequence for PhopGV-SA was determined and compared to PhopGV-136 with some gene variation observed (i.e. odv-e66 and vp91/p95). The biological activity of PhopGV-SA against P. operculella neonate larvae was evaluated with an estimated LC₅₀ of 1.87×10⁸ OBs.ml⁻¹ being determined. This study therefore reports the characterisation of a novel South African PhopGV isolate which could potentially be developed into a biopesticide for the control of P. operculella.
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The meaning of expenditure actually incurred in the context of share-based payments for trading stock or services rendered
- Authors: Nguta, Mbulelo
- Date: 2015
- Subjects: South African Revenue Service , Labat Africa , Stocks -- Taxation -- Law and legislation -- South Africa , Income tax deductions for expenses , Income tax -- Accounting -- Law and legislation -- South Africa , Actions and defenses
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:920 , http://hdl.handle.net/10962/d1018661
- Description: Section 11(a) of the Income Tax Act 58 of 1962 entitles taxpayers to a deduction in respect of expenditure actually incurred, provided that all the other requirements of section 11 and section 23 of the Act have been met. A company may issue its own shares, credited as fully paid up, as a payment for trading stock or services rendered, as was the case in C:SARS v Labat Africa (2011) 74 SATC 1. The question that was raised by this decision is whether the issue of shares constitutes “expenditure” as contemplated in section 11(a) of the Act. It is trite that a share in a company is a bundle of rights which entitle the holder to dividends when declared and to a vote in shareholders’ meetings and that a share does not come into the hands of a shareholder by way of transfer from the company, but is rather created as a bundle of rights for him in the company. In C: SARS v Labat Africa, the Supreme Court of Appeal decided that to issue shares as a payment for goods is not expenditure as contemplated in section 11(a) of the Act. The Act does not define “expenditure”. It has been interpreted in certain cases as a payment of money or disbursement, while it has been interpreted as the undertaking of a legal obligation in other cases. The Labat Africa case has been criticised for its interpretation of expenditure on the grounds that it is contrary to the principle that “actually incurred” does not mean “actually paid”. This research has argued that, in the context of the Labat Africa case, which related to an issue of shares in payment for goods, Harms AP’s judgment was concerned with showing why a share issue is not expenditure. He could not have intended to deny a deduction to transactions such as credit purchases.
- Full Text:
- Authors: Nguta, Mbulelo
- Date: 2015
- Subjects: South African Revenue Service , Labat Africa , Stocks -- Taxation -- Law and legislation -- South Africa , Income tax deductions for expenses , Income tax -- Accounting -- Law and legislation -- South Africa , Actions and defenses
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:920 , http://hdl.handle.net/10962/d1018661
- Description: Section 11(a) of the Income Tax Act 58 of 1962 entitles taxpayers to a deduction in respect of expenditure actually incurred, provided that all the other requirements of section 11 and section 23 of the Act have been met. A company may issue its own shares, credited as fully paid up, as a payment for trading stock or services rendered, as was the case in C:SARS v Labat Africa (2011) 74 SATC 1. The question that was raised by this decision is whether the issue of shares constitutes “expenditure” as contemplated in section 11(a) of the Act. It is trite that a share in a company is a bundle of rights which entitle the holder to dividends when declared and to a vote in shareholders’ meetings and that a share does not come into the hands of a shareholder by way of transfer from the company, but is rather created as a bundle of rights for him in the company. In C: SARS v Labat Africa, the Supreme Court of Appeal decided that to issue shares as a payment for goods is not expenditure as contemplated in section 11(a) of the Act. The Act does not define “expenditure”. It has been interpreted in certain cases as a payment of money or disbursement, while it has been interpreted as the undertaking of a legal obligation in other cases. The Labat Africa case has been criticised for its interpretation of expenditure on the grounds that it is contrary to the principle that “actually incurred” does not mean “actually paid”. This research has argued that, in the context of the Labat Africa case, which related to an issue of shares in payment for goods, Harms AP’s judgment was concerned with showing why a share issue is not expenditure. He could not have intended to deny a deduction to transactions such as credit purchases.
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The quantification of fucoxanthin from selected South African marine brown algae (Phaeophyta) using HPLC-UV/Vis
- Authors: Mubaiwa, Byron Tawanda
- Date: 2015
- Subjects: Marine algae , Brown algae , High performance liquid chromatography , Functional foods , Xanthophylls , Carotenoids , Extraction (Chemistry)
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3868 , http://hdl.handle.net/10962/d1017879
- Description: Marine brown algae (seaweeds) are a rich source of fucoxanthin, a xanthophyll carotenoid that is naturally, an accessory pigment in the process of photosynthesis of sea vegetation such as Sargassum incisifolium. Fucoxanthin has been exploited by nutraceutical companies for its anti-obesity effects that has resulted in an increase of seaweed slimming preparations such as FucoThin™. The field is getting widespread consumer attention as interest in fucoxanthin has also transcended to its widespread biological potential which include cytotoxicity, anti-diabetic, anti-oxidant, anti-inflammatory and anti-plasmodium effects. We therefore wanted to identify a reliable source(s) of fucoxanthin from diverse samples of South African marine brown algae in order to explore our medicinal chemistry interests around the cytotoxicity and anti-malarial potential of fucoxanthin. A known source, Sargassum incisifolium, was used to isolate (maceration in CH₂Cl₂/MeOH at 35 °C followed by a hexane/EtOAc step gradient silica column of the crude extract and reversed phase semi-prep HPLC) and characterize (1D and 2D NMR) fucoxanthin (reference standard) in order to develop an analytical method for its determination in selected diverse brown algae commonly found in South Africa. The HPLC [Column: Phenomenex® Synergi™ (250 x 3.0 mm i.d); Mobile phase: ACN/H2O (95:5)] method developed for this analysis was validated according the guidelines set by the International Conference on Harmonization (ICH). Fifteen species were then assessed for fucoxanthin content (μg/g of dried weight) using the developed method. Stability studies on fucoxanthin were also carried out to assess photo- and pH degradation of fucoxanthin. Zonaria subarticulata (KOS130226-18) from Kenton-On-Sea beach and Sargassum incisifolium (PA130427-1) from Port Alfred beach were found to be the highest producers of fucoxanthin with 0.50 mg/g and 0.45 mg/g dried weight respectively. Fucoxanthin was found to be both photo-labile and sensitive to both acidic and basic pH environments. However, the pigment was more photostable in pure as opposed to extract form and also showed to be more stable at pH 10.0. Our findings show that Z. subarticulata and S. incisifolium could be reliable sources of fucoxanthin and can be considered as the algae to use in optimized extraction procedures in further studies. Also, when working with fucoxanthin, it is important to protect it from light. Any consideration of taking fucoxanthin preparation orally (as a nutraceutical) should consider protecting the active from the harsh conditions of the gastrointestinal tract. Any upscale production of fucoxanthin from seaweed should consider variations such as geographical, seasonal, lifecycle stage, etc. of identified algae as these may be important factors in obtaining effective concentrations of fucoxanthin.
- Full Text:
- Authors: Mubaiwa, Byron Tawanda
- Date: 2015
- Subjects: Marine algae , Brown algae , High performance liquid chromatography , Functional foods , Xanthophylls , Carotenoids , Extraction (Chemistry)
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3868 , http://hdl.handle.net/10962/d1017879
- Description: Marine brown algae (seaweeds) are a rich source of fucoxanthin, a xanthophyll carotenoid that is naturally, an accessory pigment in the process of photosynthesis of sea vegetation such as Sargassum incisifolium. Fucoxanthin has been exploited by nutraceutical companies for its anti-obesity effects that has resulted in an increase of seaweed slimming preparations such as FucoThin™. The field is getting widespread consumer attention as interest in fucoxanthin has also transcended to its widespread biological potential which include cytotoxicity, anti-diabetic, anti-oxidant, anti-inflammatory and anti-plasmodium effects. We therefore wanted to identify a reliable source(s) of fucoxanthin from diverse samples of South African marine brown algae in order to explore our medicinal chemistry interests around the cytotoxicity and anti-malarial potential of fucoxanthin. A known source, Sargassum incisifolium, was used to isolate (maceration in CH₂Cl₂/MeOH at 35 °C followed by a hexane/EtOAc step gradient silica column of the crude extract and reversed phase semi-prep HPLC) and characterize (1D and 2D NMR) fucoxanthin (reference standard) in order to develop an analytical method for its determination in selected diverse brown algae commonly found in South Africa. The HPLC [Column: Phenomenex® Synergi™ (250 x 3.0 mm i.d); Mobile phase: ACN/H2O (95:5)] method developed for this analysis was validated according the guidelines set by the International Conference on Harmonization (ICH). Fifteen species were then assessed for fucoxanthin content (μg/g of dried weight) using the developed method. Stability studies on fucoxanthin were also carried out to assess photo- and pH degradation of fucoxanthin. Zonaria subarticulata (KOS130226-18) from Kenton-On-Sea beach and Sargassum incisifolium (PA130427-1) from Port Alfred beach were found to be the highest producers of fucoxanthin with 0.50 mg/g and 0.45 mg/g dried weight respectively. Fucoxanthin was found to be both photo-labile and sensitive to both acidic and basic pH environments. However, the pigment was more photostable in pure as opposed to extract form and also showed to be more stable at pH 10.0. Our findings show that Z. subarticulata and S. incisifolium could be reliable sources of fucoxanthin and can be considered as the algae to use in optimized extraction procedures in further studies. Also, when working with fucoxanthin, it is important to protect it from light. Any consideration of taking fucoxanthin preparation orally (as a nutraceutical) should consider protecting the active from the harsh conditions of the gastrointestinal tract. Any upscale production of fucoxanthin from seaweed should consider variations such as geographical, seasonal, lifecycle stage, etc. of identified algae as these may be important factors in obtaining effective concentrations of fucoxanthin.
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The relationship between leadership and organisational effectiveness among indigenous banks in Kenya
- Authors: Muriithi, Samuel Muiruri
- Date: 2015
- Subjects: Leadership -- Kenya , Organizational effectiveness -- Kenya , Transformational leadership -- Kenya , Strategic planning -- Kenya , Community banks -- Kenya , Structural equation modeling , Emotional intelligence
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1208 , http://hdl.handle.net/10962/d1020015
- Description: Defining leadership effectiveness (LE) remains a controversial subject with scholars and researchers disagreeing on a common definition. Most studies term leadership effectiveness as the leaders’ ability to successfully exercise personal influence and abilities in order to accomplish set standards. Such leadership effectiveness was measured using three elements, namely influence, follow commitment and versatility. To be effective, leaders must possess certain competencies and perform specific tasks (independent variables). In this study, three leadership competencies, namely strategic thinking, emotional effectiveness and transformational leadership were examined. Similarly, seven leadership tasks (set organisational direction, develop human capital, build core competencies, create organisational alignment, sustain appropriate organisational culture, manage change and establish balanced organisational control) were identified as essential for the attainment of leadership effectiveness (intervening variable) which, in turn, leads to organisational effectiveness (dependent variable). Given the importance of leadership effectiveness to organisational effectiveness, the purpose of this study was to identify, investigate and empirically test the possible relationship between leadership effectiveness and organisational effectiveness within the Kenyan indigenous banks. To achieve the aim of the study, a survey was undertaken using a structured self-administered questionnaire. The respondents were identified using both probability and non-probability techniques with the survey yielding 257 usable questionnaires that were statistically analysed. The proposed hypothetical relationship between leadership effectiveness and organisational effectiveness was assessed using Structural Equation Modelling (SEM), a multivariate statistical technique. The SEM included Cronbach’s alpha and confirmatory factor analyses to assess the dicriminant reliability and validity of the measuring instrument, and Goodness-of-fit indices. The study findings demonstrated the existence of a strong relationship between leadership competencies, tasks performed and leadership effectiveness which in turn impacts on organisational effectiveness, in this case the overall effectiveness of the Kenyan indigenous banks.
- Full Text:
The relationship between leadership and organisational effectiveness among indigenous banks in Kenya
- Authors: Muriithi, Samuel Muiruri
- Date: 2015
- Subjects: Leadership -- Kenya , Organizational effectiveness -- Kenya , Transformational leadership -- Kenya , Strategic planning -- Kenya , Community banks -- Kenya , Structural equation modeling , Emotional intelligence
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1208 , http://hdl.handle.net/10962/d1020015
- Description: Defining leadership effectiveness (LE) remains a controversial subject with scholars and researchers disagreeing on a common definition. Most studies term leadership effectiveness as the leaders’ ability to successfully exercise personal influence and abilities in order to accomplish set standards. Such leadership effectiveness was measured using three elements, namely influence, follow commitment and versatility. To be effective, leaders must possess certain competencies and perform specific tasks (independent variables). In this study, three leadership competencies, namely strategic thinking, emotional effectiveness and transformational leadership were examined. Similarly, seven leadership tasks (set organisational direction, develop human capital, build core competencies, create organisational alignment, sustain appropriate organisational culture, manage change and establish balanced organisational control) were identified as essential for the attainment of leadership effectiveness (intervening variable) which, in turn, leads to organisational effectiveness (dependent variable). Given the importance of leadership effectiveness to organisational effectiveness, the purpose of this study was to identify, investigate and empirically test the possible relationship between leadership effectiveness and organisational effectiveness within the Kenyan indigenous banks. To achieve the aim of the study, a survey was undertaken using a structured self-administered questionnaire. The respondents were identified using both probability and non-probability techniques with the survey yielding 257 usable questionnaires that were statistically analysed. The proposed hypothetical relationship between leadership effectiveness and organisational effectiveness was assessed using Structural Equation Modelling (SEM), a multivariate statistical technique. The SEM included Cronbach’s alpha and confirmatory factor analyses to assess the dicriminant reliability and validity of the measuring instrument, and Goodness-of-fit indices. The study findings demonstrated the existence of a strong relationship between leadership competencies, tasks performed and leadership effectiveness which in turn impacts on organisational effectiveness, in this case the overall effectiveness of the Kenyan indigenous banks.
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The relative contribution of non-timber forest products, agriculture and off-farm sources of income to rural households in Koloni and Guquka, Eastern Cape
- Authors: Mtati, Nosiseko
- Date: 2015
- Subjects: Informal sector (Economics) -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Rural poor -- South Africa -- Eastern Cape , Households -- Economic aspects -- South Africa -- Eastern Cape , Forest products -- South Africa -- Eastern Cape , Non-timber forest products -- South Africa -- Eastern Cape , Agriculture -- Economic aspects -- South Africa -- Eastern Cape , Natural resources -- South Africa -- Eastern Cape , Income -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4785 , http://hdl.handle.net/10962/d1018193
- Description: [Partial abstract]: This study was carried out to determine the contribution of non-timber forest products (NTFPs) to household total income, other livelihood sectors were also examined simultaneously. The contribution of agriculture involved livestock and crop production. Wages and government grants were other livelihood sectors that were looked into. This study was important in determining the change in livelihood strategies in the last decade and to quantify the NTFPs used at the two sites. It was carried out in Guquka and Koloni, both part of the central Eastern Cape. Information on direct use value of the NTFPs used, the quantities and local price; crop production outputs and inputs and the costs. Data were collected via a questionnaire.
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- Authors: Mtati, Nosiseko
- Date: 2015
- Subjects: Informal sector (Economics) -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Rural poor -- South Africa -- Eastern Cape , Households -- Economic aspects -- South Africa -- Eastern Cape , Forest products -- South Africa -- Eastern Cape , Non-timber forest products -- South Africa -- Eastern Cape , Agriculture -- Economic aspects -- South Africa -- Eastern Cape , Natural resources -- South Africa -- Eastern Cape , Income -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4785 , http://hdl.handle.net/10962/d1018193
- Description: [Partial abstract]: This study was carried out to determine the contribution of non-timber forest products (NTFPs) to household total income, other livelihood sectors were also examined simultaneously. The contribution of agriculture involved livestock and crop production. Wages and government grants were other livelihood sectors that were looked into. This study was important in determining the change in livelihood strategies in the last decade and to quantify the NTFPs used at the two sites. It was carried out in Guquka and Koloni, both part of the central Eastern Cape. Information on direct use value of the NTFPs used, the quantities and local price; crop production outputs and inputs and the costs. Data were collected via a questionnaire.
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