Will the real custodian of natural resource management please stand up
- Authors: Shackleton, Charlie M
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6657 , http://hdl.handle.net/10962/d1007076
- Description: South Africa is the custodian of an immense wealth of biodiversity resources, and is estimated to be the third most biodiverse country in the world. At the ecosystem level this biodiversity supports the production of goods and services used by us all; water, air, soil fertility, wood, food, etc. At a more local level the harvesting of numerous natural resources provides consumptive products for millions of poor South Africans, as well as income for equally significant numbers.Consumption of and trade in these resources is the very mainstay of their well-being, and crucial in preventing deeper poverty levels. For example, despite massive improvements in the provision of electricity, most rural and a significant proportion of urban South Africans continue to use fuelwood as a key energy source for cooking (e.g. 65% of electrified households in the urban areas of Makana municipality, and 92% of households in the rural areas of Bushbuckridge); approximately 75% of the population use medicinal plants for medicinal or cultural reasons; and millions of urban and rural households make use of wild edible herbs. With such high demand for these resources, it is not unsurprising that there are large and established trade networks spanning local, regional, national and, for some resources (e.g. specific medicinal plants, mopane worms), international boundaries. The total value of this trade is unknown, and unrecorded in local or national economic or GDP statistics. It certainly equates to billions of rands per year. The direct-use and trade values are substantial and provide a cost saving to the State. Where biodiversity resources are overused or exhausted, people have to purchase alternatives, which reduces their scarce cash resources, thereby increasing their likely dependency on State welfare grants.
- Full Text:
- Date Issued: 2009
- Authors: Shackleton, Charlie M
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6657 , http://hdl.handle.net/10962/d1007076
- Description: South Africa is the custodian of an immense wealth of biodiversity resources, and is estimated to be the third most biodiverse country in the world. At the ecosystem level this biodiversity supports the production of goods and services used by us all; water, air, soil fertility, wood, food, etc. At a more local level the harvesting of numerous natural resources provides consumptive products for millions of poor South Africans, as well as income for equally significant numbers.Consumption of and trade in these resources is the very mainstay of their well-being, and crucial in preventing deeper poverty levels. For example, despite massive improvements in the provision of electricity, most rural and a significant proportion of urban South Africans continue to use fuelwood as a key energy source for cooking (e.g. 65% of electrified households in the urban areas of Makana municipality, and 92% of households in the rural areas of Bushbuckridge); approximately 75% of the population use medicinal plants for medicinal or cultural reasons; and millions of urban and rural households make use of wild edible herbs. With such high demand for these resources, it is not unsurprising that there are large and established trade networks spanning local, regional, national and, for some resources (e.g. specific medicinal plants, mopane worms), international boundaries. The total value of this trade is unknown, and unrecorded in local or national economic or GDP statistics. It certainly equates to billions of rands per year. The direct-use and trade values are substantial and provide a cost saving to the State. Where biodiversity resources are overused or exhausted, people have to purchase alternatives, which reduces their scarce cash resources, thereby increasing their likely dependency on State welfare grants.
- Full Text:
- Date Issued: 2009
We need a conversation about development
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6199 , http://hdl.handle.net/10962/d1008563
- Description: [From the introduction] From the Communist Party across to the corporate spin-doctors and down to the Development Committees in the shack settlements, more or less everybody in South Africa speaks the language of development. In some ways this is a good thing. It indicates a hard won agreement that the realities of inequality in our society are so cruel and perverse that any social project can only be credible if it will ameliorate these divisions and the suffering they cause.
- Full Text:
- Date Issued: 2009
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6199 , http://hdl.handle.net/10962/d1008563
- Description: [From the introduction] From the Communist Party across to the corporate spin-doctors and down to the Development Committees in the shack settlements, more or less everybody in South Africa speaks the language of development. In some ways this is a good thing. It indicates a hard won agreement that the realities of inequality in our society are so cruel and perverse that any social project can only be credible if it will ameliorate these divisions and the suffering they cause.
- Full Text:
- Date Issued: 2009
Uncertainty and fear - but restoration completed
- Authors: Lewis, Colin A
- Date: 1994
- Language: English
- Type: Article
- Identifier: vital:6169 , http://hdl.handle.net/10962/d1012359
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 1994
- Authors: Lewis, Colin A
- Date: 1994
- Language: English
- Type: Article
- Identifier: vital:6169 , http://hdl.handle.net/10962/d1012359
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 1994
The use of archaeological and ethnographical information to supplement the historical record of the distribution of large mammalian herbivores in South Africa
- Bernard, Ric T F, Parker, Daniel M
- Authors: Bernard, Ric T F , Parker, Daniel M
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6914 , http://hdl.handle.net/10962/d1011877
- Description: Introduction: The introduction of animal taxa to areas where they do not naturally occur has the potential to damage severely the native fauna and flora. Introductions, both accidental and intentional, to Australia, New Zealand, Marion Island and other oceanic islands provide spectacular examples of this.1,2 Non-native mammalian herbivores often become invasive in the absence of their natural predators2 and their impact on vegetation, which may include alterations to plant species composition, structure and diversity, is exaggerated, especially if the vegetation has evolved in the absence of similar herbivores.3,4 This influence is not limited to the direct consequence for the vegetation and there may be a cascade effect on ecosystem functioning through, for example, a decline in the amount of available forage for indigenous herbivores,3 a reduction in the breeding efficiency of birds that rely on the vegetation,5,6 and a negative effect on carbon storage by transforming stands of dense vegetative cover to open savannah like systems.7 Nor are these outcomes restricted to non-native herbivores; the re-introduction of a species, such as the elephant (Loxodonta africana), to areas from which it has been absent for many years may have similar consequences.8–11 Additional problems associated with the uncontrolled movement of large mammals include the transmission of disease, such as brucellosis in the United States,3 and a threat to the genetic integrity of a species through hybridization.12 It is thus clear that deliberate introductions of herbivores to areas where they do not naturally occur may not be sound conservation practice.
- Full Text:
- Date Issued: 2006
- Authors: Bernard, Ric T F , Parker, Daniel M
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6914 , http://hdl.handle.net/10962/d1011877
- Description: Introduction: The introduction of animal taxa to areas where they do not naturally occur has the potential to damage severely the native fauna and flora. Introductions, both accidental and intentional, to Australia, New Zealand, Marion Island and other oceanic islands provide spectacular examples of this.1,2 Non-native mammalian herbivores often become invasive in the absence of their natural predators2 and their impact on vegetation, which may include alterations to plant species composition, structure and diversity, is exaggerated, especially if the vegetation has evolved in the absence of similar herbivores.3,4 This influence is not limited to the direct consequence for the vegetation and there may be a cascade effect on ecosystem functioning through, for example, a decline in the amount of available forage for indigenous herbivores,3 a reduction in the breeding efficiency of birds that rely on the vegetation,5,6 and a negative effect on carbon storage by transforming stands of dense vegetative cover to open savannah like systems.7 Nor are these outcomes restricted to non-native herbivores; the re-introduction of a species, such as the elephant (Loxodonta africana), to areas from which it has been absent for many years may have similar consequences.8–11 Additional problems associated with the uncontrolled movement of large mammals include the transmission of disease, such as brucellosis in the United States,3 and a threat to the genetic integrity of a species through hybridization.12 It is thus clear that deliberate introductions of herbivores to areas where they do not naturally occur may not be sound conservation practice.
- Full Text:
- Date Issued: 2006
The thoroughly democratic logic of refusing to vote
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6202 , http://hdl.handle.net/10962/d1008570
- Description: [From introduction]: Poor people’s movements like the Landless People’s Movement in Johannesburg, the Anti-Eviction Campaign in Cape Town and Abahlali baseMjondolo in Durban and Cape Town, along with a host of smaller community organisations around the country, have announced their refusal to vote in the coming election.
- Full Text:
- Date Issued: 2009
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6202 , http://hdl.handle.net/10962/d1008570
- Description: [From introduction]: Poor people’s movements like the Landless People’s Movement in Johannesburg, the Anti-Eviction Campaign in Cape Town and Abahlali baseMjondolo in Durban and Cape Town, along with a host of smaller community organisations around the country, have announced their refusal to vote in the coming election.
- Full Text:
- Date Issued: 2009
The third Marion Island oceanographic study (MIOS III) conducted during April and May 1998
- Froneman, Pierre William, Ansorge, Isabelle J
- Authors: Froneman, Pierre William , Ansorge, Isabelle J
- Date: 1998
- Language: English
- Type: Article
- Identifier: vital:6937 , http://hdl.handle.net/10962/d1011959
- Description: Focuses on the third Marion Island Oceanographic Study (MIOS III). Objectives of the study; Details on the results; Conclusions.
- Full Text: false
- Date Issued: 1998
- Authors: Froneman, Pierre William , Ansorge, Isabelle J
- Date: 1998
- Language: English
- Type: Article
- Identifier: vital:6937 , http://hdl.handle.net/10962/d1011959
- Description: Focuses on the third Marion Island Oceanographic Study (MIOS III). Objectives of the study; Details on the results; Conclusions.
- Full Text: false
- Date Issued: 1998
The prevalence of use and value of wild edible herbs in South Africa
- Authors: Shackleton, Charlie M
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6652 , http://hdl.handle.net/10962/d1007063
- Description: The prevalence of use and commercial value of wild edible herbs in South Africa is examined from four recent quantitative studies at eight different sites. The use of wild edible herbs was widespread in rural communities, with over 90% of households using them in all but one sample site. Mean frequency of use in season was generally between two and five times per week, with a mean of four times across all sites. But many households consume them daily. Use in winter was less than in summer. The mass of wild edible herbs consumed ranged from 12 kg to over 130 kg per household per year. Local (farm-gate) prices ranged from R2.65 to R72 per kilogram, but were generally between R30 and R40 per kg. Direct-use value to consuming households ranged from R85 to almost R5000 across the eight sites, with a mean of R1020 per user household per year. Although harvesting of wild herbs takes time, the high gross direct-use value represents a considerable saving on having to purchase commercial alternatives. Key species differ from place to place both in availability and use, and include both indigenous and exotic species. Commonly used genera include Amaranthus, Bidens, Chenopodium, Cleome, Corchorus, and Momordica. The use, value and trade in wild edible herbs currently receives no recognition in land and agrarian reform policies. It is imperative that this be addressed, and the relationships between rural livelihoods, use of wild edible herbs, food security, and land and resource tenure be clarified, and debated within the policy forums around different models for, and delivery of, agrarian reform and rural development.
- Full Text:
- Date Issued: 2003
- Authors: Shackleton, Charlie M
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6652 , http://hdl.handle.net/10962/d1007063
- Description: The prevalence of use and commercial value of wild edible herbs in South Africa is examined from four recent quantitative studies at eight different sites. The use of wild edible herbs was widespread in rural communities, with over 90% of households using them in all but one sample site. Mean frequency of use in season was generally between two and five times per week, with a mean of four times across all sites. But many households consume them daily. Use in winter was less than in summer. The mass of wild edible herbs consumed ranged from 12 kg to over 130 kg per household per year. Local (farm-gate) prices ranged from R2.65 to R72 per kilogram, but were generally between R30 and R40 per kg. Direct-use value to consuming households ranged from R85 to almost R5000 across the eight sites, with a mean of R1020 per user household per year. Although harvesting of wild herbs takes time, the high gross direct-use value represents a considerable saving on having to purchase commercial alternatives. Key species differ from place to place both in availability and use, and include both indigenous and exotic species. Commonly used genera include Amaranthus, Bidens, Chenopodium, Cleome, Corchorus, and Momordica. The use, value and trade in wild edible herbs currently receives no recognition in land and agrarian reform policies. It is imperative that this be addressed, and the relationships between rural livelihoods, use of wild edible herbs, food security, and land and resource tenure be clarified, and debated within the policy forums around different models for, and delivery of, agrarian reform and rural development.
- Full Text:
- Date Issued: 2003
The KwaZulu-Natal Slums Act: bloody legislation against the expropriated
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6201 , http://hdl.handle.net/10962/d1008568
- Description: [From introduction]: On 14 May 2009 the Constitutional Court will hear the attempt by the shack dweller’s movement Abahlali baseMjondolo to have the KwaZulu-Natal Slums Act declared unlawful. Other provinces have been mandated to develop similar legislation and the decision of the court may have a significant impact on the future of our cities.
- Full Text:
- Date Issued: 2009
- Authors: Pithouse, Richard, 1970-
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6201 , http://hdl.handle.net/10962/d1008568
- Description: [From introduction]: On 14 May 2009 the Constitutional Court will hear the attempt by the shack dweller’s movement Abahlali baseMjondolo to have the KwaZulu-Natal Slums Act declared unlawful. Other provinces have been mandated to develop similar legislation and the decision of the court may have a significant impact on the future of our cities.
- Full Text:
- Date Issued: 2009
The Johannesburg project
- Authors: Lewis, Colin A
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6167 , http://hdl.handle.net/10962/d1012355
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 2006
- Authors: Lewis, Colin A
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6167 , http://hdl.handle.net/10962/d1012355
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 2006
The bells of Jamestown, South Atlantic Ocean
- Authors: Lewis, Colin A
- Date: 2004
- Language: English
- Type: Article
- Identifier: vital:6177 , http://hdl.handle.net/10962/d1012370 , http://www.ringingworld.co.uk
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 2004
- Authors: Lewis, Colin A
- Date: 2004
- Language: English
- Type: Article
- Identifier: vital:6177 , http://hdl.handle.net/10962/d1012370 , http://www.ringingworld.co.uk
- Description: Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 2004
Sunday Times: Celebrating Women
- Authors: Sunday Times
- Date: 2010
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7187 , http://hdl.handle.net/10962/d1006279 , Nyokong, Tebello
- Description: A passion for light drove Professor Tebello Nyokong of Rhodes University into her photodynamic therapy research, harnessing light for cancer therapy and environmental clean-up using special dyes. And with this groundbreaking work she won the Africa-Arab State 2009 L'Oreal UNESCO Award for Women in Science.
- Full Text:
- Date Issued: 2010
- Authors: Sunday Times
- Date: 2010
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7187 , http://hdl.handle.net/10962/d1006279 , Nyokong, Tebello
- Description: A passion for light drove Professor Tebello Nyokong of Rhodes University into her photodynamic therapy research, harnessing light for cancer therapy and environmental clean-up using special dyes. And with this groundbreaking work she won the Africa-Arab State 2009 L'Oreal UNESCO Award for Women in Science.
- Full Text:
- Date Issued: 2010
Sterols and sterolins in Hypoxis hemerocallidea (African potato)
- Nair, V D P, Kanfer, Isadore
- Authors: Nair, V D P , Kanfer, Isadore
- Date: 2008
- Language: English
- Type: text , Article
- Identifier: vital:6417 , http://hdl.handle.net/10962/d1006535
- Description: Commercially available health supplements and herbal remedies containing sterols and sterolins, either from African potato (Hypoxis hemerocallidea) alone, or whether enriched with sterols and sterolins, are claimed to be efficacious in the treatment of a variety of ailments. Sterols and sterolins in African potato are purported to be the relevant constituents that are required for the therapeutic claims of such products. A patent describing the extraction of sterolins from African potato plant material has claimed that approximately 9 mg sterolins can be isolated from 100 g of an enriched aqueous African potato extract. Our analysis of African potato plant material and its sterol and sterolin content, when similarly prepared, shows that the measureable content of sterols and sterolins in African potato is far less than the amounts of these compounds that have been claimed to be necessary for therapeutic benefit. We conclude that therapeutic claims relating to sterol and sterolin content in African potato are unsubstantiated, in view of the extremely low content of such compounds that we have isolated from our plant material, and in products containing African potato, or extracts thereof.
- Full Text:
- Date Issued: 2008
- Authors: Nair, V D P , Kanfer, Isadore
- Date: 2008
- Language: English
- Type: text , Article
- Identifier: vital:6417 , http://hdl.handle.net/10962/d1006535
- Description: Commercially available health supplements and herbal remedies containing sterols and sterolins, either from African potato (Hypoxis hemerocallidea) alone, or whether enriched with sterols and sterolins, are claimed to be efficacious in the treatment of a variety of ailments. Sterols and sterolins in African potato are purported to be the relevant constituents that are required for the therapeutic claims of such products. A patent describing the extraction of sterolins from African potato plant material has claimed that approximately 9 mg sterolins can be isolated from 100 g of an enriched aqueous African potato extract. Our analysis of African potato plant material and its sterol and sterolin content, when similarly prepared, shows that the measureable content of sterols and sterolins in African potato is far less than the amounts of these compounds that have been claimed to be necessary for therapeutic benefit. We conclude that therapeutic claims relating to sterol and sterolin content in African potato are unsubstantiated, in view of the extremely low content of such compounds that we have isolated from our plant material, and in products containing African potato, or extracts thereof.
- Full Text:
- Date Issued: 2008
Sensitivity of different areas of the flexor aspect of the human forearm to corticosteroid-induced skin blanching
- Meyer, Eric, Smith, Eric W, Haigh, John M
- Authors: Meyer, Eric , Smith, Eric W , Haigh, John M
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6394 , http://hdl.handle.net/10962/d1006317
- Description: The intensity of corticosteroid-induced blanching has been found to vary at different areas of the flexor aspect of the human forearm. A retrospective analysis of 38,880 observations of skin blanching in 56 volunteers was conducted to assess the sensitivity of forearm skin to betamethasone 17-valerate. The mid-forearm appears to be more sensitive to the blanching response than do the areas close to the wrist or elbow. These results indicate that each preparation under evaluation should be applied to several sites along the forearm when using the human skin blanching assay in order to obtain an accurate comparative assessment of corticosteroid release from topical delivery vehicles.
- Full Text: false
- Date Issued: 1992
- Authors: Meyer, Eric , Smith, Eric W , Haigh, John M
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6394 , http://hdl.handle.net/10962/d1006317
- Description: The intensity of corticosteroid-induced blanching has been found to vary at different areas of the flexor aspect of the human forearm. A retrospective analysis of 38,880 observations of skin blanching in 56 volunteers was conducted to assess the sensitivity of forearm skin to betamethasone 17-valerate. The mid-forearm appears to be more sensitive to the blanching response than do the areas close to the wrist or elbow. These results indicate that each preparation under evaluation should be applied to several sites along the forearm when using the human skin blanching assay in order to obtain an accurate comparative assessment of corticosteroid release from topical delivery vehicles.
- Full Text: false
- Date Issued: 1992
SA scientist one of the top five female physical scientists
- Authors: Limson, Janice L
- Date: 2008
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7189 , http://hdl.handle.net/10962/d1006283 , http://www.scienceinafrica.co.za/2008/october/nyokong.htm
- Description: South African scientist Professor Tebello Nyokong scoops 2009 L’ORÉAL-UNESCO For Women in Science Award. Announced on November 10, South African scientist Professor Tebello Nyokong has become the first South African scientist to win the L’ORÉALUNESCO award for women in science for research in physical sciences.
- Full Text:
- Date Issued: 2008
- Authors: Limson, Janice L
- Date: 2008
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7189 , http://hdl.handle.net/10962/d1006283 , http://www.scienceinafrica.co.za/2008/october/nyokong.htm
- Description: South African scientist Professor Tebello Nyokong scoops 2009 L’ORÉAL-UNESCO For Women in Science Award. Announced on November 10, South African scientist Professor Tebello Nyokong has become the first South African scientist to win the L’ORÉALUNESCO award for women in science for research in physical sciences.
- Full Text:
- Date Issued: 2008
Résultats des études menées en Angleterre: détermination de la posologie optimale
- Woodford, R, Haigh, John M, Barry, B W
- Authors: Woodford, R , Haigh, John M , Barry, B W
- Date: 1981
- Language: French
- Type: Article
- Identifier: vital:6449 , http://hdl.handle.net/10962/d1006636
- Description: Les auteurs ont etudie la biodisponibilite et I'activite de formules experimentales et commercialisees de dermocortico'ides en utilisant les essais de vasoconstriction avec et sans occlusion (1, 2, 6, 7, 8, 9). L'application unique de six heures avec lectures multiples a ete largement utilisee dans ce travail et la methodologie en a ete decrite en detail ailleurs (4). Sur la base de ce travail. on a pratique des applications repetees de dermocortico'ides commercialises au Royaume- Uni. en utilisant Ie test du blanchiment de la peau sans occlusion, de maniere a reproduire au plus pres la situation realisee en clinique (3). Ce travail a montre que I'application de cortico'ides trois fois par jour pendant cinq jours aboutissait a une tachyphylaxie considerable de la reponse du blanchiment quelque soit I'activite therapeutique de la formule utilisee. Au bout de deux jours de repos, on a assiste a une recuperation considerable, mais a nouveau une tachyphylaxie aigue s'est installee a la suite d'une nouvelle application triquotidienne.
- Full Text:
- Date Issued: 1981
- Authors: Woodford, R , Haigh, John M , Barry, B W
- Date: 1981
- Language: French
- Type: Article
- Identifier: vital:6449 , http://hdl.handle.net/10962/d1006636
- Description: Les auteurs ont etudie la biodisponibilite et I'activite de formules experimentales et commercialisees de dermocortico'ides en utilisant les essais de vasoconstriction avec et sans occlusion (1, 2, 6, 7, 8, 9). L'application unique de six heures avec lectures multiples a ete largement utilisee dans ce travail et la methodologie en a ete decrite en detail ailleurs (4). Sur la base de ce travail. on a pratique des applications repetees de dermocortico'ides commercialises au Royaume- Uni. en utilisant Ie test du blanchiment de la peau sans occlusion, de maniere a reproduire au plus pres la situation realisee en clinique (3). Ce travail a montre que I'application de cortico'ides trois fois par jour pendant cinq jours aboutissait a une tachyphylaxie considerable de la reponse du blanchiment quelque soit I'activite therapeutique de la formule utilisee. Au bout de deux jours de repos, on a assiste a une recuperation considerable, mais a nouveau une tachyphylaxie aigue s'est installee a la suite d'une nouvelle application triquotidienne.
- Full Text:
- Date Issued: 1981
Ringing the changes
- Authors: Lewis, Colin A
- Date: 1994
- Language: English
- Type: Article
- Identifier: vital:6185 , http://hdl.handle.net/10962/d1012383
- Description: The restoration of the bells of the Grahamstown Cathedral heralds a new interest in bell-ringing in South Africa. Although the music of ringing bells is part of our heritage, few people know much about the development, or even the rules of change ringing. This is the form of ringing typical of Britain and, increasingly, of Australia, New Zealand, U.S.A., Canada, and southern Africa. , Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 1994
- Authors: Lewis, Colin A
- Date: 1994
- Language: English
- Type: Article
- Identifier: vital:6185 , http://hdl.handle.net/10962/d1012383
- Description: The restoration of the bells of the Grahamstown Cathedral heralds a new interest in bell-ringing in South Africa. Although the music of ringing bells is part of our heritage, few people know much about the development, or even the rules of change ringing. This is the form of ringing typical of Britain and, increasingly, of Australia, New Zealand, U.S.A., Canada, and southern Africa. , Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
- Full Text:
- Date Issued: 1994
Reproductive behaviour of Plectroctena mandibularis F. Smith (Hymenoptera: Formicidae), a ponerine ant with ergatoid queens
- Authors: Villet, Martin H
- Date: 1999
- Language: English
- Type: Article
- Identifier: vital:6890 , http://hdl.handle.net/10962/d1011650
- Description: [From the text]: The present study reports on new observations on the reproductive biology of P. mandibularis, particularly the phenology of males, mating behaviour and colony founding, that may help in deciding between alternative explanations for the occurrence of ergatoid queens in this species.
- Full Text:
- Date Issued: 1999
- Authors: Villet, Martin H
- Date: 1999
- Language: English
- Type: Article
- Identifier: vital:6890 , http://hdl.handle.net/10962/d1011650
- Description: [From the text]: The present study reports on new observations on the reproductive biology of P. mandibularis, particularly the phenology of males, mating behaviour and colony founding, that may help in deciding between alternative explanations for the occurrence of ergatoid queens in this species.
- Full Text:
- Date Issued: 1999
Recovery of the critically endangered river pipefish, Syngnathus watermeyeri, in the Kariega Estuary, Eastern Cape province
- Vorwerk, Paul D, Froneman, P William, Paterson, Angus W
- Authors: Vorwerk, Paul D , Froneman, P William , Paterson, Angus W
- Date: 2007
- Language: English
- Type: text , Article
- Identifier: vital:6965 , http://hdl.handle.net/10962/d1012028
- Description: An intensive ichthyofaunal survey in the permanently open Kariega Estuary along the Eastern Cape coast has identified a breeding population of the critically endangered river pipefish, Syngnathus watermeyeri, within the middle and upper reaches of the system. This is the first recorded capture of this species in the estuary for over four decades. We suggest that the presence of S. watermeyeri is the result of the heavy rainfall within the region, which contributed to the establishment of optimum habitat requirements (mesohaline conditions and increased food availability) of the pipefish.
- Full Text:
- Date Issued: 2007
- Authors: Vorwerk, Paul D , Froneman, P William , Paterson, Angus W
- Date: 2007
- Language: English
- Type: text , Article
- Identifier: vital:6965 , http://hdl.handle.net/10962/d1012028
- Description: An intensive ichthyofaunal survey in the permanently open Kariega Estuary along the Eastern Cape coast has identified a breeding population of the critically endangered river pipefish, Syngnathus watermeyeri, within the middle and upper reaches of the system. This is the first recorded capture of this species in the estuary for over four decades. We suggest that the presence of S. watermeyeri is the result of the heavy rainfall within the region, which contributed to the establishment of optimum habitat requirements (mesohaline conditions and increased food availability) of the pipefish.
- Full Text:
- Date Issued: 2007
Prof Nyokong wins NRF Lifetime Achievement Award
- Date: 2013
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7215 , http://hdl.handle.net/10962/d1006511 , Nyokong, Tebello
- Description: Professor Tebello Nyokong of Rhodes University was presented with the Lifetime Achievement Award at this year’s NRF Awards, held in Port Elizabeth, 2013. She is currently a Distinguished Professor of Chemistry at Rhodes University and holder of the DST-NRF Research Chair in Medicinal Chemistry and Nanotechnology, as well as Director of the DST-Mintek Nanotechnology Innovation Centre focussing on sensors.
- Full Text:
- Date Issued: 2013
- Date: 2013
- Subjects: Nyokong, Tebello
- Language: English
- Type: Article , text
- Identifier: vital:7215 , http://hdl.handle.net/10962/d1006511 , Nyokong, Tebello
- Description: Professor Tebello Nyokong of Rhodes University was presented with the Lifetime Achievement Award at this year’s NRF Awards, held in Port Elizabeth, 2013. She is currently a Distinguished Professor of Chemistry at Rhodes University and holder of the DST-NRF Research Chair in Medicinal Chemistry and Nanotechnology, as well as Director of the DST-Mintek Nanotechnology Innovation Centre focussing on sensors.
- Full Text:
- Date Issued: 2013
Physical and biological variability in the Antarctic Polar Frontal Zone: report on research cruise 103 of the MV SA Agulhas
- Froneman, P William, Ansorge, Isabelle J, Vumazonke, Lukhanyiso U, Gulekana, A, Bernard, K S, Webb, Arthur C M, Leukes, W, Risien, C M, Thomalla, S, Hermes, J, Knott, M, Anderson, D, Hargey, N, Jennings, M E, Veitch, J, Lutjeharms, Johan R E, McQuaid, Christopher D
- Authors: Froneman, P William , Ansorge, Isabelle J , Vumazonke, Lukhanyiso U , Gulekana, A , Bernard, K S , Webb, Arthur C M , Leukes, W , Risien, C M , Thomalla, S , Hermes, J , Knott, M , Anderson, D , Hargey, N , Jennings, M E , Veitch, J , Lutjeharms, Johan R E , McQuaid, Christopher D
- Date: 2002
- Language: English
- Type: Article
- Identifier: vital:6910 , http://hdl.handle.net/10962/d1011863
- Description: A detailed hydrographic and biological survey was carried out in the region of the South-west Indian Ridge during April 2002. Hydrographic data revealed that the Andrew Bain Fracture Zone, centred at 30oE, 50oS, functions as an important choke point to the flow of the Antarctic Circumpolar Current, resulting in the convergence of the Antarctic Polar Front (APF) and the southern branch of the Sub-Antarctic Front (SSAF). Total chlorophyll-a concentration and zooplankton biomass were highest at stations occupied in the vicinity of two frontal features represented by the APF and SSAF. These data suggest that the region of the South-west Indian Ridge is an area of elevated biological activity and probably acts as an important offshore feeding area for the top predators on the Prince Edward Islands.
- Full Text:
- Date Issued: 2002
- Authors: Froneman, P William , Ansorge, Isabelle J , Vumazonke, Lukhanyiso U , Gulekana, A , Bernard, K S , Webb, Arthur C M , Leukes, W , Risien, C M , Thomalla, S , Hermes, J , Knott, M , Anderson, D , Hargey, N , Jennings, M E , Veitch, J , Lutjeharms, Johan R E , McQuaid, Christopher D
- Date: 2002
- Language: English
- Type: Article
- Identifier: vital:6910 , http://hdl.handle.net/10962/d1011863
- Description: A detailed hydrographic and biological survey was carried out in the region of the South-west Indian Ridge during April 2002. Hydrographic data revealed that the Andrew Bain Fracture Zone, centred at 30oE, 50oS, functions as an important choke point to the flow of the Antarctic Circumpolar Current, resulting in the convergence of the Antarctic Polar Front (APF) and the southern branch of the Sub-Antarctic Front (SSAF). Total chlorophyll-a concentration and zooplankton biomass were highest at stations occupied in the vicinity of two frontal features represented by the APF and SSAF. These data suggest that the region of the South-west Indian Ridge is an area of elevated biological activity and probably acts as an important offshore feeding area for the top predators on the Prince Edward Islands.
- Full Text:
- Date Issued: 2002