Electrocatalytic behaviour of carbon paste electrode modified with iron(II) phthalocyanine (FePc) nanoparticles towards the detection of amitrole
- Siswana, Msimelelo P, Ozoemena, Kenneth I, Nyokong, Tebello
- Authors: Siswana, Msimelelo P , Ozoemena, Kenneth I , Nyokong, Tebello
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6591 , http://hdl.handle.net/10962/d1004340
- Description: This paper describes the construction of a carbon paste electrode (CPE) impregnated with nanoparticles of iron(II) phthalocyanine (nanoFePc). The new electrode (nanoFePc-CPE) revealed interesting electrocatalytic behaviour towards amitrole; pure catalytic diffusion-controlled process, with high Tafel slope (235 mV/decade) suggesting strong binding of amitrole with nanoFePc catalyst. The effects of catalyst loading, varying pH and electrolytes were studied. The mechanism for the interaction of amitrole with the nanoFePc is proposed to involve the Fe[superscript (III)]Pc/Fe[superscript (II)]Pc redox process. Using chronoamperometry (E = +0.42 V versus Ag/AgCl) technique, the sensor was reliably employed for amitrole assay at pH 12.0 phosphate buffer (with sodium sulphate as the supporting electrolyte) for up to 12 nM amitrole with excellent sensitivity (ca. 3.44 μA/nM) and low detection limit (3.62 ± 0.11 nM, i.e. 0.305 μg L[superscript (−1)] using the YB + 3σB criterion and 0.85 ± 0.03 nM, i.e. 70 ng/L with the Y[subscript B] + 2[subscript σB] criterion) as well as satisfactory amperometric selectivity coefficient (K[subscript amp] ≈ 7.4 × 10[superscript (−4)] for ammonium thiocyanate, a component of many amitrole herbicides, and 3.2 × 10[superscript (−3)] for asulam pesticide). The surface of the electrode can easily be regenerated by simple polishing on an alumina paper, obtaining a fresh surface ready for use in a new assay. The proposed electrode was successfully applied in the quantification of amitrole in its commercial formulation as well as in tap water samples.
- Full Text:
- Date Issued: 2006
- Authors: Siswana, Msimelelo P , Ozoemena, Kenneth I , Nyokong, Tebello
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6591 , http://hdl.handle.net/10962/d1004340
- Description: This paper describes the construction of a carbon paste electrode (CPE) impregnated with nanoparticles of iron(II) phthalocyanine (nanoFePc). The new electrode (nanoFePc-CPE) revealed interesting electrocatalytic behaviour towards amitrole; pure catalytic diffusion-controlled process, with high Tafel slope (235 mV/decade) suggesting strong binding of amitrole with nanoFePc catalyst. The effects of catalyst loading, varying pH and electrolytes were studied. The mechanism for the interaction of amitrole with the nanoFePc is proposed to involve the Fe[superscript (III)]Pc/Fe[superscript (II)]Pc redox process. Using chronoamperometry (E = +0.42 V versus Ag/AgCl) technique, the sensor was reliably employed for amitrole assay at pH 12.0 phosphate buffer (with sodium sulphate as the supporting electrolyte) for up to 12 nM amitrole with excellent sensitivity (ca. 3.44 μA/nM) and low detection limit (3.62 ± 0.11 nM, i.e. 0.305 μg L[superscript (−1)] using the YB + 3σB criterion and 0.85 ± 0.03 nM, i.e. 70 ng/L with the Y[subscript B] + 2[subscript σB] criterion) as well as satisfactory amperometric selectivity coefficient (K[subscript amp] ≈ 7.4 × 10[superscript (−4)] for ammonium thiocyanate, a component of many amitrole herbicides, and 3.2 × 10[superscript (−3)] for asulam pesticide). The surface of the electrode can easily be regenerated by simple polishing on an alumina paper, obtaining a fresh surface ready for use in a new assay. The proposed electrode was successfully applied in the quantification of amitrole in its commercial formulation as well as in tap water samples.
- Full Text:
- Date Issued: 2006
Observations of the habitats and biodiversity of the submarine canyons at Sodwana Bay
- Sink, K J, Boshoff, W, Samaai, Toufiek, Timm, P G, Kerwath, S E
- Authors: Sink, K J , Boshoff, W , Samaai, Toufiek , Timm, P G , Kerwath, S E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6771 , http://hdl.handle.net/10962/d1008065
- Description: The discovery of coelacanths, Latimeria chalumnae, in Jesser Canyon off Sodwana Bay in northern KwaZulu-Natal in 2000 triggered renewed interest in the deep subtidal habitats associated with submarine canyons. Information stemming from three recreational Trimix diving expeditions in Wright and Jesser canyons between April 1998 and June 2001 revealed distinct and diverse invertebrate and fish communities in the canyons of the Greater St Lucia Wetland Park (GSLWP). In total, 69 invertebrate taxa were collected from Wright Canyon, including at least 15 new records for South Africa plus 11 potential new species and 16 range or depth extensions. Divers documented the first five coelacanth specimens and obtained information on fish distribution and abundance. Five different habitat types were recognized supporting distinct biological communities; the sandy plains outside of the canyons, scattered rock outcrops within the sandy plains, the canyon margin, canyon walls and caves and overhangs. The canyon margin is the richest habitat and supports dense communities of invertebrate suspension feeders, as well as a diverse and abundant fish fauna. Dominant canyon invertebrates included sponges, black corals, gorgonians, alcyonarian soft corals and stylasterine lace corals. These invertebrates support a diverse epifauna including basket- and brittlestars, winged oysters and other molluscs. The canyons within the GSLWP protect large populations of commercially important linefish species including the sparids, Chrysoblephus puniceus, C. anglicus, Polysteganus praeorbitalis and P. caeruleopunctatus, as well as several species of serranids and lutjanids. Additional biological sampling and standardized quantitative sampling within the canyons and deep reefs is required to develop a better understanding of their biological communities and the factors that shape them.
- Full Text:
- Date Issued: 2006
- Authors: Sink, K J , Boshoff, W , Samaai, Toufiek , Timm, P G , Kerwath, S E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6771 , http://hdl.handle.net/10962/d1008065
- Description: The discovery of coelacanths, Latimeria chalumnae, in Jesser Canyon off Sodwana Bay in northern KwaZulu-Natal in 2000 triggered renewed interest in the deep subtidal habitats associated with submarine canyons. Information stemming from three recreational Trimix diving expeditions in Wright and Jesser canyons between April 1998 and June 2001 revealed distinct and diverse invertebrate and fish communities in the canyons of the Greater St Lucia Wetland Park (GSLWP). In total, 69 invertebrate taxa were collected from Wright Canyon, including at least 15 new records for South Africa plus 11 potential new species and 16 range or depth extensions. Divers documented the first five coelacanth specimens and obtained information on fish distribution and abundance. Five different habitat types were recognized supporting distinct biological communities; the sandy plains outside of the canyons, scattered rock outcrops within the sandy plains, the canyon margin, canyon walls and caves and overhangs. The canyon margin is the richest habitat and supports dense communities of invertebrate suspension feeders, as well as a diverse and abundant fish fauna. Dominant canyon invertebrates included sponges, black corals, gorgonians, alcyonarian soft corals and stylasterine lace corals. These invertebrates support a diverse epifauna including basket- and brittlestars, winged oysters and other molluscs. The canyons within the GSLWP protect large populations of commercially important linefish species including the sparids, Chrysoblephus puniceus, C. anglicus, Polysteganus praeorbitalis and P. caeruleopunctatus, as well as several species of serranids and lutjanids. Additional biological sampling and standardized quantitative sampling within the canyons and deep reefs is required to develop a better understanding of their biological communities and the factors that shape them.
- Full Text:
- Date Issued: 2006
Isolation, purification and characterization of a novel glucose oxidase from Penicillium canescens Tt42
- Authors: Simpson, Clinton
- Date: 2006
- Subjects: Penicillium , Glucose , Oxidases
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3975 , http://hdl.handle.net/10962/d1004034 , Penicillium , Glucose , Oxidases
- Description: A novel glucose oxidase from Penicillium canescens (Tt42) was isolated, purified and characterised. The P. canescens Tt42 was cultivated using an optimised growth medium from literature, and maximum glucose oxidase activities of 11.5 U/ml and 6.9 U/ml for the intra- and extracellular fractions were obtained. Maximum glucose oxidase production was achieved after 72 hours at 28°C which coincided with glucose depletion. A total of 1104 U (from 60ml) of glucose oxidase was produced with a biomass specific glucose oxidase activity of 1.08 Umg[superscript -1] Four methods of cell disruption were evaluated for release of intracellular glucose oxidase from P. canescens Tt42 cells. These methods were; sonication, French press, Freeze-Thaw and a high pressure cell disrupter (Z-Plus Series) from Constant systems. All the methods were successful in releasing the intracellular glucose oxidase from P. canescens Tt42. The use of the Constant Systems high pressure cell disrupter was preferred, since it was the simplest and most rapid method. Ammonium sulphate precipitation was shown to be effective as an initial purification step for extracellular glucose oxidase from P. canescens Tt42. Comparison of the intra- and extracellular glucose oxidase fractions using isoelectric focusing showed 2 isoenzymes in both fractions. The pI values of the isoenzymes were determined to be 4.30 and 4.67, with the former being dominant. Since both the intra- and extracellular fractions contained the same isoenzymes of glucose oxidase, further purification studies were performed using the extracellular fraction. The glucose oxidase from P. canescens Tt42 was purified using 3 main techniques: ammonium sulphate precipitation (60% - 70% cut), anion exchange chromatography (Super Q 650M) and size exclusion chromatography (Sephadex S200HR). The glucose oxidase was determined to be ±80% pure by size exclusion chromatography. The final purified glucose oxidase was lyophilised, and an overall purification yield of 10.3% was achieved with an 8.6-fold purification. The purified glucose oxidase was confirmed to be catalase free. Glucose oxidase from P. canescens Tt42 was determined to be a dimeric protein (M[subscript r] ±148kDa) likely consisting of 2 equal subunits (M[subscript r] ± 70kDa). The temperature optimum range was shown to be 25-30°C. The optimum pH for the oxidation of β-D-glucose was pH 7. The enzyme was shown to be stable at 25°C for 10 hours, with a half life of approximately 30 minutes at 37°C. The lyophilised enzyme was stable at -20°C for 6 months. The properties of glucose oxidase from Tt42 were comparable to alternative glucose oxidase enzymes from Aspergillus and other Penicillium species. Glucose oxidase from P. canescens Tt42 was shown to have distinct kinetic characteristics. The V[subscript max] and K[subscript m] were shown to be 651 Umg[superscript -1] and 18.4 mM towards β-D-glucose. The catalytic kcat and specificity k[subscript cat]/K[subscript m] constants for glucose oxidase from P. canescens Tt42 were shown to be 791 s[superscript -1] and 40 s[superscript -1]mM[superscript -1] each respectively. The specificity constant (k[subscript cat]/K[subscript m]) of glucose oxidase from P. canescens Tt42 was determined to be 1.3-fold higher than that that of A. niger (Sigma Type VII) and 8.7-fold lower than that of P. amagasakiense (ATCC 28686) from literature.
- Full Text:
- Date Issued: 2006
- Authors: Simpson, Clinton
- Date: 2006
- Subjects: Penicillium , Glucose , Oxidases
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3975 , http://hdl.handle.net/10962/d1004034 , Penicillium , Glucose , Oxidases
- Description: A novel glucose oxidase from Penicillium canescens (Tt42) was isolated, purified and characterised. The P. canescens Tt42 was cultivated using an optimised growth medium from literature, and maximum glucose oxidase activities of 11.5 U/ml and 6.9 U/ml for the intra- and extracellular fractions were obtained. Maximum glucose oxidase production was achieved after 72 hours at 28°C which coincided with glucose depletion. A total of 1104 U (from 60ml) of glucose oxidase was produced with a biomass specific glucose oxidase activity of 1.08 Umg[superscript -1] Four methods of cell disruption were evaluated for release of intracellular glucose oxidase from P. canescens Tt42 cells. These methods were; sonication, French press, Freeze-Thaw and a high pressure cell disrupter (Z-Plus Series) from Constant systems. All the methods were successful in releasing the intracellular glucose oxidase from P. canescens Tt42. The use of the Constant Systems high pressure cell disrupter was preferred, since it was the simplest and most rapid method. Ammonium sulphate precipitation was shown to be effective as an initial purification step for extracellular glucose oxidase from P. canescens Tt42. Comparison of the intra- and extracellular glucose oxidase fractions using isoelectric focusing showed 2 isoenzymes in both fractions. The pI values of the isoenzymes were determined to be 4.30 and 4.67, with the former being dominant. Since both the intra- and extracellular fractions contained the same isoenzymes of glucose oxidase, further purification studies were performed using the extracellular fraction. The glucose oxidase from P. canescens Tt42 was purified using 3 main techniques: ammonium sulphate precipitation (60% - 70% cut), anion exchange chromatography (Super Q 650M) and size exclusion chromatography (Sephadex S200HR). The glucose oxidase was determined to be ±80% pure by size exclusion chromatography. The final purified glucose oxidase was lyophilised, and an overall purification yield of 10.3% was achieved with an 8.6-fold purification. The purified glucose oxidase was confirmed to be catalase free. Glucose oxidase from P. canescens Tt42 was determined to be a dimeric protein (M[subscript r] ±148kDa) likely consisting of 2 equal subunits (M[subscript r] ± 70kDa). The temperature optimum range was shown to be 25-30°C. The optimum pH for the oxidation of β-D-glucose was pH 7. The enzyme was shown to be stable at 25°C for 10 hours, with a half life of approximately 30 minutes at 37°C. The lyophilised enzyme was stable at -20°C for 6 months. The properties of glucose oxidase from Tt42 were comparable to alternative glucose oxidase enzymes from Aspergillus and other Penicillium species. Glucose oxidase from P. canescens Tt42 was shown to have distinct kinetic characteristics. The V[subscript max] and K[subscript m] were shown to be 651 Umg[superscript -1] and 18.4 mM towards β-D-glucose. The catalytic kcat and specificity k[subscript cat]/K[subscript m] constants for glucose oxidase from P. canescens Tt42 were shown to be 791 s[superscript -1] and 40 s[superscript -1]mM[superscript -1] each respectively. The specificity constant (k[subscript cat]/K[subscript m]) of glucose oxidase from P. canescens Tt42 was determined to be 1.3-fold higher than that that of A. niger (Sigma Type VII) and 8.7-fold lower than that of P. amagasakiense (ATCC 28686) from literature.
- Full Text:
- Date Issued: 2006
AmaNdebele, Peter Magubane and Sandra Klopper: book review
- Authors: Simbao, Ruth K
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147336 , vital:38627 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC31002
- Description: AmaNdebele is a very attractive book with beautifully reproduced colour photographs taken by the renowned photographer Peter Magubane, who secured enormous credibility as a photojournalist during the violent years of apartheid. While some South African readers who browse through the glossy portrayals of ceremonial attire and homestead decorations may recall Magubane's earlier books such as Soweto speaks (1981) and Soweto: The fruit of fear (1986) in which the photographer laid bare the ferocious violence of apartheid rule, many readers will skip over the nuances of both Magubane's disrupted career and the contentious relationship between the Ndebele people and the South African apartheid government.
- Full Text:
- Date Issued: 2006
- Authors: Simbao, Ruth K
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147336 , vital:38627 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC31002
- Description: AmaNdebele is a very attractive book with beautifully reproduced colour photographs taken by the renowned photographer Peter Magubane, who secured enormous credibility as a photojournalist during the violent years of apartheid. While some South African readers who browse through the glossy portrayals of ceremonial attire and homestead decorations may recall Magubane's earlier books such as Soweto speaks (1981) and Soweto: The fruit of fear (1986) in which the photographer laid bare the ferocious violence of apartheid rule, many readers will skip over the nuances of both Magubane's disrupted career and the contentious relationship between the Ndebele people and the South African apartheid government.
- Full Text:
- Date Issued: 2006
Utilising value stream mapping to improve operations at Transwerk Uitenhage
- Authors: Silo, Andile Elliot
- Date: 2006
- Subjects: Production engineering , Production planning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8760 , http://hdl.handle.net/10948/604 , http://hdl.handle.net/10948/d1011684 , Production engineering , Production planning
- Description: Transwerk is a business uint of Transnet. It was established in 1940. Since 1940 unti 1994, Transwerk operated as the engineering section of Spoornet and was known as South African Railways. Transwerk emancipated in 1994 and had plants in all nine provinces of South Africa. In the past, trains were hauled by steam locomatives, which were manually operated. With the improvement of technology, steam locomotives were replaced by diesel locomotives. The recent technology improvement brought about electric locomotives which are more reliable than diesel locomotives.Trnaswerk has a plant in the Eastern Cape Province which is situated in Uitenhage. This plant focuses on refurbishing wagins for Spoornet. This research is about improving the refurbishing processes of Transwerk Uitenhage.
- Full Text:
- Date Issued: 2006
- Authors: Silo, Andile Elliot
- Date: 2006
- Subjects: Production engineering , Production planning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8760 , http://hdl.handle.net/10948/604 , http://hdl.handle.net/10948/d1011684 , Production engineering , Production planning
- Description: Transwerk is a business uint of Transnet. It was established in 1940. Since 1940 unti 1994, Transwerk operated as the engineering section of Spoornet and was known as South African Railways. Transwerk emancipated in 1994 and had plants in all nine provinces of South Africa. In the past, trains were hauled by steam locomatives, which were manually operated. With the improvement of technology, steam locomotives were replaced by diesel locomotives. The recent technology improvement brought about electric locomotives which are more reliable than diesel locomotives.Trnaswerk has a plant in the Eastern Cape Province which is situated in Uitenhage. This plant focuses on refurbishing wagins for Spoornet. This research is about improving the refurbishing processes of Transwerk Uitenhage.
- Full Text:
- Date Issued: 2006
Firewalls at Rhodes
- Authors: Siebörger, David
- Date: 2006
- Language: English
- Type: Conference paper
- Identifier: vital:6610 , http://hdl.handle.net/10962/d1009522
- Description: A presentation on the use of Internet Firewalls at Rhodes University. This formed part of the International Network for the Availability of Scientific Publications' Bandwidth Management and Optimisation Open Source Tools and Solutions project, being a series of workshops conducted throughout the developing world.
- Full Text:
- Date Issued: 2006
- Authors: Siebörger, David
- Date: 2006
- Language: English
- Type: Conference paper
- Identifier: vital:6610 , http://hdl.handle.net/10962/d1009522
- Description: A presentation on the use of Internet Firewalls at Rhodes University. This formed part of the International Network for the Availability of Scientific Publications' Bandwidth Management and Optimisation Open Source Tools and Solutions project, being a series of workshops conducted throughout the developing world.
- Full Text:
- Date Issued: 2006
Blogging, journalism and the public sphere: assessing the value of the 'blogosphere' as a new form of the public sphere : a case study of the Mail & Guardian Online's Blogmark
- Authors: Sibanda, Fortune
- Date: 2006
- Subjects: Habermas, Jürgen -- Criticism and interpretation , Mail & Guardian , Blogs -- South Africa , Online journalism -- South Africa , Electronic newspapers -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3483 , http://hdl.handle.net/10962/d1002938 , Habermas, Jürgen -- Criticism and interpretation , Mail & Guardian , Blogs -- South Africa , Online journalism -- South Africa , Electronic newspapers -- South Africa
- Description: The study seeks to investigate whether weblogs can act as virtual public spheres, where people can meet to discuss issues of interest to them. It uses the Mail & Guardian Online’s Blogmark as a case study. Weblogs – highly interactive online journals comprised of links and postings in reverse chronological order – are fast becoming an avenue of choice for many internet users wanting to share opinions and news with others online. Because of their unique read-and-write characteristics, some have equated them to the 18th century coffeehouses, around which the early forms of citizen involvement in public affairs began in early capitalist Europe. Despite their growing popularity, however, not much scholarly work has been dedicated to the practice of blogging in Africa, and particularly in South Africa. The study’s theoretical framework is drawn from Jürgen Habermas’s concept of the public sphere. While noting some of the criticisms of the Habermasian model, it is argued that the concept is instrumental in our understanding of the relationship between the media and democracy. The study, however, adopted a re-worked model of the concept of the public sphere. This model argues for the need to have a multiplicity of public sphericules (instead of one single public sphere as advocated by Habermas), around which individuals can congregate to discuss issues of common concern to them. Using a combination of qualitative content analysis, self-completion questionnaires and a semi-structured interview, the study found Blogmark to be an example of how emerging internet genres such as weblogs can be vehicles of citizen involvement in public life. A range of issues were discussed in the blog, from politics, race and ii i gender issues, to personal anecdotes, relationships, and sex. However, while some posts exhibited high levels of interactivity, with many bloggers joining in to offer their opinions, some read like online monologues. The study argues that although blogging is a practice that is still limited to a few privileged individuals, with the everrising size of the ‘blogosphere’, weblogs such as Blogmark are making a small but not insignificant contribution to the number of voices that can be heard in the public realm.
- Full Text:
- Date Issued: 2006
- Authors: Sibanda, Fortune
- Date: 2006
- Subjects: Habermas, Jürgen -- Criticism and interpretation , Mail & Guardian , Blogs -- South Africa , Online journalism -- South Africa , Electronic newspapers -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3483 , http://hdl.handle.net/10962/d1002938 , Habermas, Jürgen -- Criticism and interpretation , Mail & Guardian , Blogs -- South Africa , Online journalism -- South Africa , Electronic newspapers -- South Africa
- Description: The study seeks to investigate whether weblogs can act as virtual public spheres, where people can meet to discuss issues of interest to them. It uses the Mail & Guardian Online’s Blogmark as a case study. Weblogs – highly interactive online journals comprised of links and postings in reverse chronological order – are fast becoming an avenue of choice for many internet users wanting to share opinions and news with others online. Because of their unique read-and-write characteristics, some have equated them to the 18th century coffeehouses, around which the early forms of citizen involvement in public affairs began in early capitalist Europe. Despite their growing popularity, however, not much scholarly work has been dedicated to the practice of blogging in Africa, and particularly in South Africa. The study’s theoretical framework is drawn from Jürgen Habermas’s concept of the public sphere. While noting some of the criticisms of the Habermasian model, it is argued that the concept is instrumental in our understanding of the relationship between the media and democracy. The study, however, adopted a re-worked model of the concept of the public sphere. This model argues for the need to have a multiplicity of public sphericules (instead of one single public sphere as advocated by Habermas), around which individuals can congregate to discuss issues of common concern to them. Using a combination of qualitative content analysis, self-completion questionnaires and a semi-structured interview, the study found Blogmark to be an example of how emerging internet genres such as weblogs can be vehicles of citizen involvement in public life. A range of issues were discussed in the blog, from politics, race and ii i gender issues, to personal anecdotes, relationships, and sex. However, while some posts exhibited high levels of interactivity, with many bloggers joining in to offer their opinions, some read like online monologues. The study argues that although blogging is a practice that is still limited to a few privileged individuals, with the everrising size of the ‘blogosphere’, weblogs such as Blogmark are making a small but not insignificant contribution to the number of voices that can be heard in the public realm.
- Full Text:
- Date Issued: 2006
Patient education : the effect on patient behaviour
- Authors: Shiri, Clarris
- Date: 2006
- Subjects: Patient education -- South Africa -- Eastern Cape Patient compliance -- South Africa -- Eastern Cape Hypertension -- Treatment -- South Africa Health care services -- South Africa Community health services -- South Africa
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3790 , http://hdl.handle.net/10962/d1003268
- Description: Evidence suggests that the prevalence of certain non-communicable diseases, such as hypertension, is increasing rapidly, and that patients with these diseases are making significant demands on the health services of the nations in sub-Saharan Africa. However, these countries also face other health-related challenges such as communicable diseases and underdevelopmentrelated diseases. Developing countries like South Africa have limited resources, in terms of man power and financial capital, to address the challenges that they are facing. Non-communicable diseases cannot be ignored and since health care providers cannot meet the challenges, it is worthwhile to empower patients to be involved in the management of their conditions. Patient education is a tool that can be used to enable patients to manage their chronic conditions and thereby reduce the morbidity and mortality rates of these conditions. The aim of this study was to investigate the effect of a patient education intervention on participants’ levels of knowledge about hypertension and its therapy, beliefs about medicines and adherence to anti-hypertensive therapy. The intervention consisted of talks and discussions with all the participants as one group and as individuals. There was also written information given to the participants. Their levels of knowledge about hypertension and its therapy were measured using one-on-one interviews and self-administered questionnaires. Beliefs about medicines were measured using the Beliefs about Medicines Questionnaire (BMQ) whilst adherence levels were measured using pill counts, elf-reports and prescription refill records. The participants’ blood pressure readings and body mass indices were also recorded throughout the study. The parameters before and after the educational intervention were compared using statistical analyses. The participants’ levels of knowledge about hypertension and its therapy significantly increased whilst their beliefs about medicines were positively modified after the educational intervention. There were also increases, though not statistically significant, in the participants’ levels of adherence to anti-hypertensive therapy. Unexpectedly, the blood pressure readings and body mass indices increased significantly. The participants gave positive feedback regarding the educational intervention and indicated a desire for similar programmes to be run continuously. They also suggested that such programmes be implemented for other common chronic conditions such as asthma and diabetes. This study proved that patient education programmes can be implemented to modify patients’ levels of knowledge about their conditions and the therapy, beliefs about medicines and adherence to therapy. However, such programmes need to be conducted over a long period of time since changes involving behaviour take a long time.
- Full Text:
- Date Issued: 2006
- Authors: Shiri, Clarris
- Date: 2006
- Subjects: Patient education -- South Africa -- Eastern Cape Patient compliance -- South Africa -- Eastern Cape Hypertension -- Treatment -- South Africa Health care services -- South Africa Community health services -- South Africa
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3790 , http://hdl.handle.net/10962/d1003268
- Description: Evidence suggests that the prevalence of certain non-communicable diseases, such as hypertension, is increasing rapidly, and that patients with these diseases are making significant demands on the health services of the nations in sub-Saharan Africa. However, these countries also face other health-related challenges such as communicable diseases and underdevelopmentrelated diseases. Developing countries like South Africa have limited resources, in terms of man power and financial capital, to address the challenges that they are facing. Non-communicable diseases cannot be ignored and since health care providers cannot meet the challenges, it is worthwhile to empower patients to be involved in the management of their conditions. Patient education is a tool that can be used to enable patients to manage their chronic conditions and thereby reduce the morbidity and mortality rates of these conditions. The aim of this study was to investigate the effect of a patient education intervention on participants’ levels of knowledge about hypertension and its therapy, beliefs about medicines and adherence to anti-hypertensive therapy. The intervention consisted of talks and discussions with all the participants as one group and as individuals. There was also written information given to the participants. Their levels of knowledge about hypertension and its therapy were measured using one-on-one interviews and self-administered questionnaires. Beliefs about medicines were measured using the Beliefs about Medicines Questionnaire (BMQ) whilst adherence levels were measured using pill counts, elf-reports and prescription refill records. The participants’ blood pressure readings and body mass indices were also recorded throughout the study. The parameters before and after the educational intervention were compared using statistical analyses. The participants’ levels of knowledge about hypertension and its therapy significantly increased whilst their beliefs about medicines were positively modified after the educational intervention. There were also increases, though not statistically significant, in the participants’ levels of adherence to anti-hypertensive therapy. Unexpectedly, the blood pressure readings and body mass indices increased significantly. The participants gave positive feedback regarding the educational intervention and indicated a desire for similar programmes to be run continuously. They also suggested that such programmes be implemented for other common chronic conditions such as asthma and diabetes. This study proved that patient education programmes can be implemented to modify patients’ levels of knowledge about their conditions and the therapy, beliefs about medicines and adherence to therapy. However, such programmes need to be conducted over a long period of time since changes involving behaviour take a long time.
- Full Text:
- Date Issued: 2006
An evaluation of formal mentoring programmes within two South African organisations
- Authors: Shelton, Delyse Elizabeth
- Date: 2006
- Subjects: Mentoring -- South Africa , Organizational effectiveness -- Evaluation , Organizational effectiveness -- South Africa , Corporate culture -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1186 , http://hdl.handle.net/10962/d1002803 , Mentoring -- South Africa , Organizational effectiveness -- Evaluation , Organizational effectiveness -- South Africa , Corporate culture -- South Africa
- Description: The benefits of informal mentoring are numerous and organisations have recognised these benefits in terms of organisational development. There has been an attempt to harvest these benefits through the introduction of formal mentoring programmes as a tool to fast track and then ultimately retain internal capability. This research on formal mentoring programmes occurred within a qualitative paradigm and data was obtained through document analysis and interviews from five mentoring pairs in one organisation and four mentoring pairs in another. The data was then presented and analysed in terms of the models proposed in the literature. The aim of this research was to evaluate formal mentoring programmes within South African organisations based on a framework provided by the literature. It was found that the literature proposed no formal evaluation model and thus, one was developed based on models of programme evaluation and formal mentoring implementation models. On the evaluation of the two formal mentoring programmes, it was found that there are some issues raised in the literature that are pertinent to both organisations but that there were also issues that were only relevant to one of the programmes. According to the research the differences in perceived success of the mentoring programme lay in the goals of the programme relating to the broader goals and culture of the organisation. It is recommended that future research investigate the impact of organisational culture on the effectiveness of formal mentoring programmes. The research also identified a need for supportive resources although this study did not assess the appropriateness and sufficiency of the resources. Organisations also need to implement effective evaluative practices in order to implement effective changes to the programme.
- Full Text:
- Date Issued: 2006
- Authors: Shelton, Delyse Elizabeth
- Date: 2006
- Subjects: Mentoring -- South Africa , Organizational effectiveness -- Evaluation , Organizational effectiveness -- South Africa , Corporate culture -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1186 , http://hdl.handle.net/10962/d1002803 , Mentoring -- South Africa , Organizational effectiveness -- Evaluation , Organizational effectiveness -- South Africa , Corporate culture -- South Africa
- Description: The benefits of informal mentoring are numerous and organisations have recognised these benefits in terms of organisational development. There has been an attempt to harvest these benefits through the introduction of formal mentoring programmes as a tool to fast track and then ultimately retain internal capability. This research on formal mentoring programmes occurred within a qualitative paradigm and data was obtained through document analysis and interviews from five mentoring pairs in one organisation and four mentoring pairs in another. The data was then presented and analysed in terms of the models proposed in the literature. The aim of this research was to evaluate formal mentoring programmes within South African organisations based on a framework provided by the literature. It was found that the literature proposed no formal evaluation model and thus, one was developed based on models of programme evaluation and formal mentoring implementation models. On the evaluation of the two formal mentoring programmes, it was found that there are some issues raised in the literature that are pertinent to both organisations but that there were also issues that were only relevant to one of the programmes. According to the research the differences in perceived success of the mentoring programme lay in the goals of the programme relating to the broader goals and culture of the organisation. It is recommended that future research investigate the impact of organisational culture on the effectiveness of formal mentoring programmes. The research also identified a need for supportive resources although this study did not assess the appropriateness and sufficiency of the resources. Organisations also need to implement effective evaluative practices in order to implement effective changes to the programme.
- Full Text:
- Date Issued: 2006
Intellectual achievement in pursuit of true belief
- Authors: Shapiro, Lucy Deborah
- Date: 2006 , 2013-06-14
- Subjects: Delusions , Knowledge, Theory of , Epistemics , Truth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2735 , http://hdl.handle.net/10962/d1005955 , Delusions , Knowledge, Theory of , Epistemics , Truth
- Description: The practice of inquiry, in which we seek and pursue true beliefs by forming justified beliefs, is important to us. This thesis will address two questions concerning the significance of this practice. These are the question of what explains our preference for this particular belief-forming practice, and whether this value can be explained by the value of true belief alone. To answer these questions I will examme a variety of our intuitive commitments to particular values, assuming their general accuracy. I will use an inference from the goal of a practice to the value of a practice, an inference based on the assumption that when we pursue something it is valuable. I will discuss our intuitive commitments to the value of justification. I will also rely on the implications of the presence of pride and admiration in relation to the outcome of an inquiry (especially in situations where a belief is difficult to form). By using this methodology, I will argue for three sources of value that explain the unique significance of the value of inquiry. The first is the value of its unique role in our being able to form reliably true beliefs. Second, I will argue for Wayne D. Riggs' account of epistemic credit; Riggs defends the value of our being responsible for true beliefs, they are our achievements. Third, I will argue for an additional the value of delivering a skilful epistemic performance, another kind of achievement. I will show that although the value of true belief plays a role in explaining some of the values, the third value for inquiry is independent of the value of true belief. This means that there are intellectual rewards, which can be gained from this practice, that extend beyond the value of true belief. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2006
- Authors: Shapiro, Lucy Deborah
- Date: 2006 , 2013-06-14
- Subjects: Delusions , Knowledge, Theory of , Epistemics , Truth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2735 , http://hdl.handle.net/10962/d1005955 , Delusions , Knowledge, Theory of , Epistemics , Truth
- Description: The practice of inquiry, in which we seek and pursue true beliefs by forming justified beliefs, is important to us. This thesis will address two questions concerning the significance of this practice. These are the question of what explains our preference for this particular belief-forming practice, and whether this value can be explained by the value of true belief alone. To answer these questions I will examme a variety of our intuitive commitments to particular values, assuming their general accuracy. I will use an inference from the goal of a practice to the value of a practice, an inference based on the assumption that when we pursue something it is valuable. I will discuss our intuitive commitments to the value of justification. I will also rely on the implications of the presence of pride and admiration in relation to the outcome of an inquiry (especially in situations where a belief is difficult to form). By using this methodology, I will argue for three sources of value that explain the unique significance of the value of inquiry. The first is the value of its unique role in our being able to form reliably true beliefs. Second, I will argue for Wayne D. Riggs' account of epistemic credit; Riggs defends the value of our being responsible for true beliefs, they are our achievements. Third, I will argue for an additional the value of delivering a skilful epistemic performance, another kind of achievement. I will show that although the value of true belief plays a role in explaining some of the values, the third value for inquiry is independent of the value of true belief. This means that there are intellectual rewards, which can be gained from this practice, that extend beyond the value of true belief. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2006
The significance of the local trade in natural resource products for livelihoods and poverty alleviation in South Africa
- Authors: Shackleton, Sheona E
- Date: 2006
- Subjects: Poverty -- South Africa Rural poor -- South Africa Natural resources -- South Africa Selling -- Handicraft South Africa -- Commerce
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4776 , http://hdl.handle.net/10962/d1011731
- Description: What role can the commercialisation of natural resource products play in the efforts to reduce poverty and vulnerability and how can this be enhanced? With poverty alleviation at the top of the global development agenda, this is a question posed by many scholars, practitioners, donor agencies and government departments operating at the environment-development interface. However, recent commentary on this issue is mixed and ambiguous, with some observers being quite optimistic regarding the potential of these products, while others hold a counter view. This thesis explores the livelihood contributions and poverty alleviation potential of four products traded locally in the Bushbuckridge municipality, South Africa; namely traditional brooms, reed mats, woodcraft and a beer made from the fruits of Sclerocarya birrea. A common approach, employing both quantitative and qualitative methods, was used to investigate the harvesting, processing and marketing arrangements, sustainability and livelihood contributions of each product. The results illustrate that any inference regarding the potential of the trade to alleviate poverty depends on how poverty is defined and interpreted, and on whether the role of these products is assessed from a holistic livelihood perspective that includes notions of vulnerability, alternatives and choice, diversification and the needs of rural producers themselves. Overall, the products studied were key in enhancing the livelihood security of the poorest members of society, forming an important safety net and assisting in raising household incomes to levels equivalent to the wider population, but generally were unlikely, on their own, to provide a route out of poverty. However, there were notable exceptions, with marked variation evident both within and across products. Incomes often surpassed local wage rates, and a minority of producers were obtaining returns equivalent to or greater than the official minimum wage. Other benefits, such as the opportunity to work from home or to diversify the livelihood portfolio, were also crucial, with the trade representing different livelihood strategies for different households. When viewed within the context of rising unemployment and HIV/AIDS these findings assume greater significance. While the trades were complex and growth limited, livelihood benefits could be improved on a sustainable basis if the sector was given the attention and support it deserves.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Sheona E
- Date: 2006
- Subjects: Poverty -- South Africa Rural poor -- South Africa Natural resources -- South Africa Selling -- Handicraft South Africa -- Commerce
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4776 , http://hdl.handle.net/10962/d1011731
- Description: What role can the commercialisation of natural resource products play in the efforts to reduce poverty and vulnerability and how can this be enhanced? With poverty alleviation at the top of the global development agenda, this is a question posed by many scholars, practitioners, donor agencies and government departments operating at the environment-development interface. However, recent commentary on this issue is mixed and ambiguous, with some observers being quite optimistic regarding the potential of these products, while others hold a counter view. This thesis explores the livelihood contributions and poverty alleviation potential of four products traded locally in the Bushbuckridge municipality, South Africa; namely traditional brooms, reed mats, woodcraft and a beer made from the fruits of Sclerocarya birrea. A common approach, employing both quantitative and qualitative methods, was used to investigate the harvesting, processing and marketing arrangements, sustainability and livelihood contributions of each product. The results illustrate that any inference regarding the potential of the trade to alleviate poverty depends on how poverty is defined and interpreted, and on whether the role of these products is assessed from a holistic livelihood perspective that includes notions of vulnerability, alternatives and choice, diversification and the needs of rural producers themselves. Overall, the products studied were key in enhancing the livelihood security of the poorest members of society, forming an important safety net and assisting in raising household incomes to levels equivalent to the wider population, but generally were unlikely, on their own, to provide a route out of poverty. However, there were notable exceptions, with marked variation evident both within and across products. Incomes often surpassed local wage rates, and a minority of producers were obtaining returns equivalent to or greater than the official minimum wage. Other benefits, such as the opportunity to work from home or to diversify the livelihood portfolio, were also crucial, with the trade representing different livelihood strategies for different households. When viewed within the context of rising unemployment and HIV/AIDS these findings assume greater significance. While the trades were complex and growth limited, livelihood benefits could be improved on a sustainable basis if the sector was given the attention and support it deserves.
- Full Text:
- Date Issued: 2006
Ameliorating poverty in South Africa through natural resource commercialisation
- Authors: Shackleton, Sheona E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6651 , http://hdl.handle.net/10962/d1007062
- Description: This short policy brief advocates for more attention to be paid to the potential of natural resource commercialisation as a means to livelihood security and poverty alleviation in rural South Africa. It is one of a set of four policy briefs based on the findings of several case studies across the country.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Sheona E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6651 , http://hdl.handle.net/10962/d1007062
- Description: This short policy brief advocates for more attention to be paid to the potential of natural resource commercialisation as a means to livelihood security and poverty alleviation in rural South Africa. It is one of a set of four policy briefs based on the findings of several case studies across the country.
- Full Text:
- Date Issued: 2006
Urban fuelwood demand and markets in a small town in South Africa: Livelihood vulnerability and alien plant control
- Shackleton, Charlie M, McConnachie, Matthew M, Chauke, Maphambe I, Mentz, J, Sutherland, F, Gambiza, James, Jones, R
- Authors: Shackleton, Charlie M , McConnachie, Matthew M , Chauke, Maphambe I , Mentz, J , Sutherland, F , Gambiza, James , Jones, R
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181224 , vital:43710 , xlink:href="https://doi.org/10.1080/13504500609469697"
- Description: Fuelwood is the primary energy for most households throughout the developing world. With increasing urbanization and declining local availability of fuelwood, a growing proportion of households obtain their fuelwood by purchasing it. These fuelwood markets are the key nexus in supply and demand scenarios and can be potentially significant points for intervention to address energy security amongst the urban poor. This paper reports on the fuelwood demand and marketing in a small town in South Africa. Despite the availability of more modern fuels and state subsidization of electricity, fuelwood was still used by half the households. Annual demand was 1.2 t per household. Over half of the households bought their fuelwood requirements because local stocks were limited. Those households that did collect their own fuelwood were significantly poorer than households that purchased fuelwood, as well as households that did not use fuelwood at all. Fuelwood markets operated through 45-60 vendors who transported fuelwood from further afield. Income from the fuelwood trade was low, but was strongly linked to hours worked. Thus, vendors working a full week did earn a meaningful income, especially in the context of high unemployment in the area. Fuelwood vendors also provided casual employment opportunities for unskilled labour. Most vendors harvested fuelwood from commonage lands, with most of the wood being from alien species. Local stocks of wood are declining in the face of constant transformation of commonage to residential areas, and a national water and biodiversity conservation programme to eradicate alien plants. This decline poses a threat to the financial viability of fuelwood markets. Yet, an opportunity exists to incorporate the vendors into the alien plant clearing programme, since they already perform such a function.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Charlie M , McConnachie, Matthew M , Chauke, Maphambe I , Mentz, J , Sutherland, F , Gambiza, James , Jones, R
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181224 , vital:43710 , xlink:href="https://doi.org/10.1080/13504500609469697"
- Description: Fuelwood is the primary energy for most households throughout the developing world. With increasing urbanization and declining local availability of fuelwood, a growing proportion of households obtain their fuelwood by purchasing it. These fuelwood markets are the key nexus in supply and demand scenarios and can be potentially significant points for intervention to address energy security amongst the urban poor. This paper reports on the fuelwood demand and marketing in a small town in South Africa. Despite the availability of more modern fuels and state subsidization of electricity, fuelwood was still used by half the households. Annual demand was 1.2 t per household. Over half of the households bought their fuelwood requirements because local stocks were limited. Those households that did collect their own fuelwood were significantly poorer than households that purchased fuelwood, as well as households that did not use fuelwood at all. Fuelwood markets operated through 45-60 vendors who transported fuelwood from further afield. Income from the fuelwood trade was low, but was strongly linked to hours worked. Thus, vendors working a full week did earn a meaningful income, especially in the context of high unemployment in the area. Fuelwood vendors also provided casual employment opportunities for unskilled labour. Most vendors harvested fuelwood from commonage lands, with most of the wood being from alien species. Local stocks of wood are declining in the face of constant transformation of commonage to residential areas, and a national water and biodiversity conservation programme to eradicate alien plants. This decline poses a threat to the financial viability of fuelwood markets. Yet, an opportunity exists to incorporate the vendors into the alien plant clearing programme, since they already perform such a function.
- Full Text:
- Date Issued: 2006
Urban forestry–A cinderella science in South Africa?
- Authors: Shackleton, Charlie M
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183092 , vital:43911 , xlink:href="https://doi.org/10.2989/10295920609505255"
- Description: The benefits of forests (in their broadest sense) and of trees to the natural environment and rural communities are well known throughout the world, including in South Africa (e.g. see chapters in Lawes et al. 2004). The presence of these benefits has also been extrapolated to urban situations, where natural forests and veld might be left in situ, or trees planted in public spaces, or in private gardens. These benefits span the social, aesthetic, health, environmental and economic spheres.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Charlie M
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183092 , vital:43911 , xlink:href="https://doi.org/10.2989/10295920609505255"
- Description: The benefits of forests (in their broadest sense) and of trees to the natural environment and rural communities are well known throughout the world, including in South Africa (e.g. see chapters in Lawes et al. 2004). The presence of these benefits has also been extrapolated to urban situations, where natural forests and veld might be left in situ, or trees planted in public spaces, or in private gardens. These benefits span the social, aesthetic, health, environmental and economic spheres.
- Full Text:
- Date Issued: 2006
Household fuelwood use in small electrified towns of the Makana District, Eastern Cape, South Africa
- Shackleton, Charlie M, Gambiza, James, Jones, R
- Authors: Shackleton, Charlie M , Gambiza, James , Jones, R
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/182362 , vital:43823 , xlink:href="https://doi.org/10.17159/2413-3051/2007/v18i4a3394"
- Description: Access to secure energy supplies is a key foundation for sustainable development. Consequently local planning and development initiatives must be based on a sound knowledge of the energy use patterns and preferences of local users. This paper reports on such for three small urban settlements in the Eastern Cape Province, with a particular focus on fuelwood use. Despite widespread electrification over a decade ago, and perceptions that the ease of fuelwood collection was declining, most households continued to use fuelwood for cooking and space heating, whereas electricity was favoured for lighting. The most common reason for this was because fuelwood was cheap (or free) compared to electricity. Annual demand was approximately 1 450 kg per household per year. Households that collected their own supplies of fuelwood were significantly poorer than those that either bought their stocks, or those that did not use fuelwood at all. Indigenous species were favoured over exotic species, although fuelwood vendors traded mostly in exotic species, particularly Eucalyptus and wattle. The greater reliance of poorer and unelectrified households on fuelwood requires that local authorities consider this in energy planning, otherwise the poor will be neglected in policies such as the Free Basic Electricity.
- Full Text:
- Date Issued: 2006
Household fuelwood use in small electrified towns of the Makana District, Eastern Cape, South Africa
- Authors: Shackleton, Charlie M , Gambiza, James , Jones, R
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/182362 , vital:43823 , xlink:href="https://doi.org/10.17159/2413-3051/2007/v18i4a3394"
- Description: Access to secure energy supplies is a key foundation for sustainable development. Consequently local planning and development initiatives must be based on a sound knowledge of the energy use patterns and preferences of local users. This paper reports on such for three small urban settlements in the Eastern Cape Province, with a particular focus on fuelwood use. Despite widespread electrification over a decade ago, and perceptions that the ease of fuelwood collection was declining, most households continued to use fuelwood for cooking and space heating, whereas electricity was favoured for lighting. The most common reason for this was because fuelwood was cheap (or free) compared to electricity. Annual demand was approximately 1 450 kg per household per year. Households that collected their own supplies of fuelwood were significantly poorer than those that either bought their stocks, or those that did not use fuelwood at all. Indigenous species were favoured over exotic species, although fuelwood vendors traded mostly in exotic species, particularly Eucalyptus and wattle. The greater reliance of poorer and unelectrified households on fuelwood requires that local authorities consider this in energy planning, otherwise the poor will be neglected in policies such as the Free Basic Electricity.
- Full Text:
- Date Issued: 2006
Household wealth status and natural resource use in the Kat River valley, South Africa
- Shackleton, Charlie M, Shackleton, Sheona E
- Authors: Shackleton, Charlie M , Shackleton, Sheona E
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181301 , vital:43717 , xlink:href="https://doi.org/10.1016/j.ecolecon.2005.04.011"
- Description: Much work has demonstrated the significant role and value of non-timber forest products (NTFPs) in the livelihoods of rural people in southern Africa and elsewhere. The findings provide a mean or composite picture, averaged across the sample households within each community. Yet, within any given community, there is significant socio-economic differentiation. It is important to acknowledge such differentiation when considering policy and management interventions to support rural livelihoods and promote sustainable resource use. This paper reports on a study in South Africa, the objective of which was to explore wealth-related differences and similarities in the use and value of NTFPs. Data on NTFP consumption, purchase, and sale were collected from households in three rural villages. Households were divided into three wealth classes and patterns of NTFPs use between the classes examined. There was no difference in the proportions of households in each wealth class using NTFPs, nor the total number of NTFPs used per household. Yet, there was some supporting evidence that poorer households derive greater benefits from NTFPs than do wealthy or intermediate households. One clear difference was that, with increasing wealth, households purchased significantly more NTFPs, and a greater proportion of wealthy households did so. Conversely, a greater proportion of poor households were involved in the sale of one or more NTFPs, and they sold a greater number per household, compared to wealthy and intermediate households. Detailed examination of use and value of four NTFPs (fuelwood, wild fruits, edible herbs, and grass hand brushes) revealed that in all instances, the poorest households used more of the resource per capita than the other wealth classes. This was not the case for comparisons based on the total household as the unit of analysis. Gross annual direct-use value did not differ between the wealth classes for any of the four NTFPs examined, at the household level. But on a per capita basis, a significantly higher gross annual direct-use value was evident within poorer households for fuelwood and edible herbs. The significance of these differences is discussed.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Charlie M , Shackleton, Sheona E
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/181301 , vital:43717 , xlink:href="https://doi.org/10.1016/j.ecolecon.2005.04.011"
- Description: Much work has demonstrated the significant role and value of non-timber forest products (NTFPs) in the livelihoods of rural people in southern Africa and elsewhere. The findings provide a mean or composite picture, averaged across the sample households within each community. Yet, within any given community, there is significant socio-economic differentiation. It is important to acknowledge such differentiation when considering policy and management interventions to support rural livelihoods and promote sustainable resource use. This paper reports on a study in South Africa, the objective of which was to explore wealth-related differences and similarities in the use and value of NTFPs. Data on NTFP consumption, purchase, and sale were collected from households in three rural villages. Households were divided into three wealth classes and patterns of NTFPs use between the classes examined. There was no difference in the proportions of households in each wealth class using NTFPs, nor the total number of NTFPs used per household. Yet, there was some supporting evidence that poorer households derive greater benefits from NTFPs than do wealthy or intermediate households. One clear difference was that, with increasing wealth, households purchased significantly more NTFPs, and a greater proportion of wealthy households did so. Conversely, a greater proportion of poor households were involved in the sale of one or more NTFPs, and they sold a greater number per household, compared to wealthy and intermediate households. Detailed examination of use and value of four NTFPs (fuelwood, wild fruits, edible herbs, and grass hand brushes) revealed that in all instances, the poorest households used more of the resource per capita than the other wealth classes. This was not the case for comparisons based on the total household as the unit of analysis. Gross annual direct-use value did not differ between the wealth classes for any of the four NTFPs examined, at the household level. But on a per capita basis, a significantly higher gross annual direct-use value was evident within poorer households for fuelwood and edible herbs. The significance of these differences is discussed.
- Full Text:
- Date Issued: 2006
Research portfolio
- Authors: Shaanika, E N
- Date: 2006
- Subjects: Education -- Namibia Arts -- Study and teaching -- Namibia Culture -- Study and teaching -- Namibia Teachers -- Training of -- Namibia Curriculum planning -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1735 , http://hdl.handle.net/10962/d1003618
- Description: This study is a contextual analysis and evaluation of the Arts-in-Culture curriculum at Ongwediva College of Education. Arts-in-Culture is one of the core subjects in the Basic Education Teacher Diploma (BETD)’s Broad Curriculum. At colleges such as Ongwediva, Caprivi and Rundu, student teachers study Arts as a core subject, while at Windhoek College of Education it can be studied as either a major or a core subject. In this study, I have raised some questions: Why is it that at Ongwediva College, the status of Arts-in-Culture is still low in comparison to other curriculum subjects like sciences and languages? Do student teachers and teacher educators fully understand how to assess the subject? Is the syllabus open for everyone? Is the learning environment conducive to offering the subject? Do the syllabus; learning environment, teacher educators and student teachers promote the goals of education for all? This study first gives the historical background of the subject. The background is of a diverse nature, namely African Indigenous Arts education, Black Arts education under the missionaries, Black Arts education under the South Africa Regime and Arts Education in the current Namibian reform dispensation. Second, the data collecting methodologies of this study are discussed. This includes how I collected information, who I contacted to collect this information, the tools I used to collect data, when and where I used them, why they were used and how they were used, the difficulties or problems I encountered and what I have learned about myself during the process. The third part of this study is the analysis of my findings from the participants interviewed and the fourth is how I have tried to link these different sections together. The last part of the paper is my conclusion.
- Full Text:
- Date Issued: 2006
- Authors: Shaanika, E N
- Date: 2006
- Subjects: Education -- Namibia Arts -- Study and teaching -- Namibia Culture -- Study and teaching -- Namibia Teachers -- Training of -- Namibia Curriculum planning -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1735 , http://hdl.handle.net/10962/d1003618
- Description: This study is a contextual analysis and evaluation of the Arts-in-Culture curriculum at Ongwediva College of Education. Arts-in-Culture is one of the core subjects in the Basic Education Teacher Diploma (BETD)’s Broad Curriculum. At colleges such as Ongwediva, Caprivi and Rundu, student teachers study Arts as a core subject, while at Windhoek College of Education it can be studied as either a major or a core subject. In this study, I have raised some questions: Why is it that at Ongwediva College, the status of Arts-in-Culture is still low in comparison to other curriculum subjects like sciences and languages? Do student teachers and teacher educators fully understand how to assess the subject? Is the syllabus open for everyone? Is the learning environment conducive to offering the subject? Do the syllabus; learning environment, teacher educators and student teachers promote the goals of education for all? This study first gives the historical background of the subject. The background is of a diverse nature, namely African Indigenous Arts education, Black Arts education under the missionaries, Black Arts education under the South Africa Regime and Arts Education in the current Namibian reform dispensation. Second, the data collecting methodologies of this study are discussed. This includes how I collected information, who I contacted to collect this information, the tools I used to collect data, when and where I used them, why they were used and how they were used, the difficulties or problems I encountered and what I have learned about myself during the process. The third part of this study is the analysis of my findings from the participants interviewed and the fourth is how I have tried to link these different sections together. The last part of the paper is my conclusion.
- Full Text:
- Date Issued: 2006
An investigation into problems facing small-to-medium sized enterprises in achieving growth in the Eastern Cape : enhancing the strategy for developing small 'growth potential' firms in the Eastern Cape
- Authors: Sha, Shafeek
- Date: 2006
- Subjects: Small business -- Management , Small business -- South Africa -- Eastern Cape , Small business -- South Africa -- Eastern Cape -- Growth , Business enterprises -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1173 , http://hdl.handle.net/10962/d1002789 , Small business -- Management , Small business -- South Africa -- Eastern Cape , Small business -- South Africa -- Eastern Cape -- Growth , Business enterprises -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Description: As the world economy continues to move towards increased integration, some of the greatest opportunities for Small-to-Medium Sized Enterprises (SMEs) will derive from their ability to participate in the global marketplace. It is generally accepted that SMEs are becoming increasingly important in terms of employment, wealth creation, and the development of innovation. However, there are considerable doubts about the quality of management in this sector with policy-makers suggesting that there are particular weaknesses in innovation, a lack of financial acumen, marketing, entrepreneurial flair, practical knowledge, and human resource management. As a result, many firms do not reach their full potential and fail to grow. According to organisational life cycle models, the introductory phase is particularly important since it is generally known and accepted that there is a high mortality rate of SMEs within the first two years. Given this high failure rate, it becomes vital to research the factors/characteristics/management abilities that are required to enable the SME to survive and indeed progress to the growth phase of the organizational life cycle. This research seeks to investigate the internal and external factors that are consistent in the success of SMEs who have reached the growth phase. A significant contribution to the enhancement of the growth potential of a firm will be made through the understanding of these factors.
- Full Text:
- Date Issued: 2006
- Authors: Sha, Shafeek
- Date: 2006
- Subjects: Small business -- Management , Small business -- South Africa -- Eastern Cape , Small business -- South Africa -- Eastern Cape -- Growth , Business enterprises -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1173 , http://hdl.handle.net/10962/d1002789 , Small business -- Management , Small business -- South Africa -- Eastern Cape , Small business -- South Africa -- Eastern Cape -- Growth , Business enterprises -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Description: As the world economy continues to move towards increased integration, some of the greatest opportunities for Small-to-Medium Sized Enterprises (SMEs) will derive from their ability to participate in the global marketplace. It is generally accepted that SMEs are becoming increasingly important in terms of employment, wealth creation, and the development of innovation. However, there are considerable doubts about the quality of management in this sector with policy-makers suggesting that there are particular weaknesses in innovation, a lack of financial acumen, marketing, entrepreneurial flair, practical knowledge, and human resource management. As a result, many firms do not reach their full potential and fail to grow. According to organisational life cycle models, the introductory phase is particularly important since it is generally known and accepted that there is a high mortality rate of SMEs within the first two years. Given this high failure rate, it becomes vital to research the factors/characteristics/management abilities that are required to enable the SME to survive and indeed progress to the growth phase of the organizational life cycle. This research seeks to investigate the internal and external factors that are consistent in the success of SMEs who have reached the growth phase. A significant contribution to the enhancement of the growth potential of a firm will be made through the understanding of these factors.
- Full Text:
- Date Issued: 2006
Increasing convergence between the recognition of an intangible asset for financial accounting purposes and strategic management accounting and project management techniques
- Seyfert, W, Rosenberg, David, Stack, Elizabeth M
- Authors: Seyfert, W , Rosenberg, David , Stack, Elizabeth M
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: Article
- Identifier: vital:6074 , http://hdl.handle.net/10962/d1003824 , http://dx.doi.org/10.1108/10222529200600012
- Description: New management techniques such as 'just-in-time', 'lean manufacturing' and 'Six Sigma' allow management accountants to shift their focus from the management and control of production processes to the management of strategic issues. This paradigm shift resulted from shorter product life cycles, due to technological advances and a more competitive business environment. Recent revisions to the International Accounting Standards which are particularly supportive of life cycle costing and project management are likely to increase the focus on strategic management accounting further. This article describes developments in management accounting and the recent convergence of financial reporting in terms of International Accounting Standards with strategic management accounting and project management techniques. Strategic management accounting (particularly life cycle costing) involves applying project management techniques and using the calculus of investment to manage the project as a whole. This contrasts with managing only costs and revenues during the manufacturing phase of a project. The article demonstrates that project management techniques and the calculus of investment provide the information needed to account for the value of a project in terms of IAS 38: Intangible Assets. This will ultimately give rise to both improved decision-making and more relevant financial reporting.
- Full Text:
- Date Issued: 2006
- Authors: Seyfert, W , Rosenberg, David , Stack, Elizabeth M
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: Article
- Identifier: vital:6074 , http://hdl.handle.net/10962/d1003824 , http://dx.doi.org/10.1108/10222529200600012
- Description: New management techniques such as 'just-in-time', 'lean manufacturing' and 'Six Sigma' allow management accountants to shift their focus from the management and control of production processes to the management of strategic issues. This paradigm shift resulted from shorter product life cycles, due to technological advances and a more competitive business environment. Recent revisions to the International Accounting Standards which are particularly supportive of life cycle costing and project management are likely to increase the focus on strategic management accounting further. This article describes developments in management accounting and the recent convergence of financial reporting in terms of International Accounting Standards with strategic management accounting and project management techniques. Strategic management accounting (particularly life cycle costing) involves applying project management techniques and using the calculus of investment to manage the project as a whole. This contrasts with managing only costs and revenues during the manufacturing phase of a project. The article demonstrates that project management techniques and the calculus of investment provide the information needed to account for the value of a project in terms of IAS 38: Intangible Assets. This will ultimately give rise to both improved decision-making and more relevant financial reporting.
- Full Text:
- Date Issued: 2006
The effect of Ge, Si and Sn phthalocyanine photosensitizers on cell proliferation and viability of human oesophageal carcinoma cells
- Seotsanyana-Mokhosi, Itumeleng, Kresfelder, Tina, Abrahamse, Heidi, Nyokong, Tebello
- Authors: Seotsanyana-Mokhosi, Itumeleng , Kresfelder, Tina , Abrahamse, Heidi , Nyokong, Tebello
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/286115 , vital:56241 , xlink:href="https://doi.org/10.1016/j.jphotobiol.2005.12.004"
- Description: The photodynamic activity of water soluble mixed sulfonated metallophthalocyanines complexes: GePcSmix, SnPcSmix and SiPcSmix on human oesophageal carcinoma (SNO) cells are reported, and compared with the activity of the unmetallated H2PcSmix and of the newly synthesized water soluble adjacently substituted binaphthalo phthalocyanine (complex 3). The alkaline phosphate (ALP) showed damage to the cell membrane in the presence of complex 3 without irradiation. The GePcSmix complex caused a relatively large increase in inflammation and a high intracellular ATP.
- Full Text:
- Date Issued: 2006
- Authors: Seotsanyana-Mokhosi, Itumeleng , Kresfelder, Tina , Abrahamse, Heidi , Nyokong, Tebello
- Date: 2006
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/286115 , vital:56241 , xlink:href="https://doi.org/10.1016/j.jphotobiol.2005.12.004"
- Description: The photodynamic activity of water soluble mixed sulfonated metallophthalocyanines complexes: GePcSmix, SnPcSmix and SiPcSmix on human oesophageal carcinoma (SNO) cells are reported, and compared with the activity of the unmetallated H2PcSmix and of the newly synthesized water soluble adjacently substituted binaphthalo phthalocyanine (complex 3). The alkaline phosphate (ALP) showed damage to the cell membrane in the presence of complex 3 without irradiation. The GePcSmix complex caused a relatively large increase in inflammation and a high intracellular ATP.
- Full Text:
- Date Issued: 2006