Intervarsity message from the Vice-Chancellor of Rhodes University 1984
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7478 , http://hdl.handle.net/10962/d1018355
- Full Text:
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7478 , http://hdl.handle.net/10962/d1018355
- Full Text:
Investigations into the dietary requirements of Clarias gariepinus larvae (Pisces : Clariidae) and the formulation and manufacture of an artificial dry feed for use in intensive larval rearing
- Authors: Uys, Wynand
- Date: 1984
- Subjects: Clarias gariepinus Catfishes -- Africa Clariidae Catfishes -- Africa -- Nutrition -- Requirements Clarias
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5205 , http://hdl.handle.net/10962/d1004446
- Description: The need for developing an artificial dry feed for Clarias gariepinus larvae was identified. Dry larval fishfeed requires certain physical properties. Techniques for manufacturing feeds which comply with these requirements were evolved and are recomended for practical use. The techniques that were used for artificial reproduction of C. gariepinus larvae are briefly discussed. The larvae were fed on various dietary formulations and their growth responses were monitored in order to determine their nutritional requirements. A feed was developed which gave superior results to those obtained with natural food organisms. This feed consisted of Torula yeast(69,8%), fishmeal(23,3%), vitamin supplements(O,9%), methionine supplement (150mg/kg), bactericide and preservatives. The feed particles were coated with a lipid supplement which was added at a ratio of 6% to the weight of the feed. The optimum particle size (diameter) for C. gariepinus larvae is 2,2% of their mean total length. The larvae should be given a feed ration of 25% of body weight per day at a frequency of once every four hours. A favourable feed conversion ratio of 1.1g of feed consumed per gram of larval weight gain was experienced. The established dry feed is suitable for use in commercial hatcheries and can be used as a standard and proven food source for further research on the intensive rearing of C. gariepinus larvae.
- Full Text:
- Authors: Uys, Wynand
- Date: 1984
- Subjects: Clarias gariepinus Catfishes -- Africa Clariidae Catfishes -- Africa -- Nutrition -- Requirements Clarias
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5205 , http://hdl.handle.net/10962/d1004446
- Description: The need for developing an artificial dry feed for Clarias gariepinus larvae was identified. Dry larval fishfeed requires certain physical properties. Techniques for manufacturing feeds which comply with these requirements were evolved and are recomended for practical use. The techniques that were used for artificial reproduction of C. gariepinus larvae are briefly discussed. The larvae were fed on various dietary formulations and their growth responses were monitored in order to determine their nutritional requirements. A feed was developed which gave superior results to those obtained with natural food organisms. This feed consisted of Torula yeast(69,8%), fishmeal(23,3%), vitamin supplements(O,9%), methionine supplement (150mg/kg), bactericide and preservatives. The feed particles were coated with a lipid supplement which was added at a ratio of 6% to the weight of the feed. The optimum particle size (diameter) for C. gariepinus larvae is 2,2% of their mean total length. The larvae should be given a feed ration of 25% of body weight per day at a frequency of once every four hours. A favourable feed conversion ratio of 1.1g of feed consumed per gram of larval weight gain was experienced. The established dry feed is suitable for use in commercial hatcheries and can be used as a standard and proven food source for further research on the intensive rearing of C. gariepinus larvae.
- Full Text:
Jim's journal: the diary of James Butler: a critical edition
- Authors: Garner, Jane Mary
- Date: 1984
- Subjects: Butler, James, 1854-1923 -- Diaries , Quakers -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2579 , http://hdl.handle.net/10962/d1004510
- Description: From Introduction: On 17 October 1876 a young man called James Butler embarked at Poplar Docks, London on the steamer Dunrobin Castle for distant Cape Town. His destination was Grahamstown in the Eastern Province of the Cape Colony, his purpose: to recover from a severe illness, probably tuberculosis, in a warm and sunny climate. He was twenty-two years and three months old. His sheltered Quaker background had not prepared him for life in a country strange in so many ways, much less for an experience which was to change the course of his life. His visit to South Africa lasted two and a half years: at the end of it his health was largely restored and he had decided that he might return to Cradock if the doctors in London thought it advisable. Cradock was the small Eastern Cape town where in fact he was to spend the rest of his life. The diary which he kept for that crucial two and a half years begins with the voyage to Cape Town and chronicles not only his travels around the Eastern Cape, but provides also a record of his own emotional growth from a somewhat insecure boy to an assured young man confident in his own future under God's guidance.
- Full Text:
- Authors: Garner, Jane Mary
- Date: 1984
- Subjects: Butler, James, 1854-1923 -- Diaries , Quakers -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2579 , http://hdl.handle.net/10962/d1004510
- Description: From Introduction: On 17 October 1876 a young man called James Butler embarked at Poplar Docks, London on the steamer Dunrobin Castle for distant Cape Town. His destination was Grahamstown in the Eastern Province of the Cape Colony, his purpose: to recover from a severe illness, probably tuberculosis, in a warm and sunny climate. He was twenty-two years and three months old. His sheltered Quaker background had not prepared him for life in a country strange in so many ways, much less for an experience which was to change the course of his life. His visit to South Africa lasted two and a half years: at the end of it his health was largely restored and he had decided that he might return to Cradock if the doctors in London thought it advisable. Cradock was the small Eastern Cape town where in fact he was to spend the rest of his life. The diary which he kept for that crucial two and a half years begins with the voyage to Cape Town and chronicles not only his travels around the Eastern Cape, but provides also a record of his own emotional growth from a somewhat insecure boy to an assured young man confident in his own future under God's guidance.
- Full Text:
Karoo basalts of the Springbok Flats: geochemistry and correlation
- Authors: Marsh, Julian S
- Date: 1984
- Language: English
- Type: text , abstracts
- Identifier: http://hdl.handle.net/10962/131634 , vital:36706
- Description: Karoo basalts underlie an area of about 3750 km2 of the Springbok Flats. Four boreholes were logged and sampled for detailed petrographic and chemical analysis. The Springbok Flats basalt's chemical composition is compared with those of the Sabie River Formation of the Lebombo and the Lesotho type of the Central Karoo area. Sr- and Nd- isotopic data were also used in determining the chemical composition. The study also allows the geographical extent of the incompatible element-enriched clan of Karoo Lavas to be refined.
- Full Text:
- Authors: Marsh, Julian S
- Date: 1984
- Language: English
- Type: text , abstracts
- Identifier: http://hdl.handle.net/10962/131634 , vital:36706
- Description: Karoo basalts underlie an area of about 3750 km2 of the Springbok Flats. Four boreholes were logged and sampled for detailed petrographic and chemical analysis. The Springbok Flats basalt's chemical composition is compared with those of the Sabie River Formation of the Lebombo and the Lesotho type of the Central Karoo area. Sr- and Nd- isotopic data were also used in determining the chemical composition. The study also allows the geographical extent of the incompatible element-enriched clan of Karoo Lavas to be refined.
- Full Text:
Message from the Vice-Chancellor
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7479 , http://hdl.handle.net/10962/d1018356
- Full Text:
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7479 , http://hdl.handle.net/10962/d1018356
- Full Text:
Message of welcome for the S.A. Universities Fencing Tournament 1984
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7480 , http://hdl.handle.net/10962/d1018357
- Full Text:
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7480 , http://hdl.handle.net/10962/d1018357
- Full Text:
Perspectives on rural development in Ciskei, 1983
- Authors: Bekker, S B , Hughes, C E B
- Date: 1984
- Subjects: Ciskei (South Africa) -- Rural conditions Community development -- South Africa -- Ciskei Rural development -- South Africa -- Ciskei
- Language: English
- Type: Book , Text
- Identifier: http://hdl.handle.net/10962/2271 , vital:20271 , ISBN 0868101036
- Description: Rural development comprises three components: production, consumption and organisation. PRODUCTION points to the activities rural people undertake to obtain goods (such as food) and services (such as transport) for themselves and others in their community. Production can be measured in terms of the amount of money a rural family earns, or in terms of the amount of food the family grows and consumes. CONSUMPTION points to the fulfilment of the needs—in the first place, the basic needs—of rural families. Primary examples are the availability of clean water and of wood as a fuel source, of health and adequate nutrition, of education, welfare and transport. These needs are met by the delivery of services to a rural community. Services are provided in the first place by the central state, often through its local authority (in Ciskei, the Tribal Authority). They may also be provided by voluntary associations active in the community, or by the household itself. ORGANISATION points simply to the ways in which productive activities (work) and consumption (receiving) are linked together in a rural community. The structure of the Tribal Authority and village councils, of schools, clinics, agricultural cooperatives, churches and women's groups are examples. All these institutions are designed to improve production and consumption in a given rural community. A rural development strategy then is a strategy aimed at improving production, consumption and the ways in which these two are linked. A rural development strategy moreover is initiated by the central government and can therefore be seen as a relationship between the central government and rural communities in Ciskei. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Authors: Bekker, S B , Hughes, C E B
- Date: 1984
- Subjects: Ciskei (South Africa) -- Rural conditions Community development -- South Africa -- Ciskei Rural development -- South Africa -- Ciskei
- Language: English
- Type: Book , Text
- Identifier: http://hdl.handle.net/10962/2271 , vital:20271 , ISBN 0868101036
- Description: Rural development comprises three components: production, consumption and organisation. PRODUCTION points to the activities rural people undertake to obtain goods (such as food) and services (such as transport) for themselves and others in their community. Production can be measured in terms of the amount of money a rural family earns, or in terms of the amount of food the family grows and consumes. CONSUMPTION points to the fulfilment of the needs—in the first place, the basic needs—of rural families. Primary examples are the availability of clean water and of wood as a fuel source, of health and adequate nutrition, of education, welfare and transport. These needs are met by the delivery of services to a rural community. Services are provided in the first place by the central state, often through its local authority (in Ciskei, the Tribal Authority). They may also be provided by voluntary associations active in the community, or by the household itself. ORGANISATION points simply to the ways in which productive activities (work) and consumption (receiving) are linked together in a rural community. The structure of the Tribal Authority and village councils, of schools, clinics, agricultural cooperatives, churches and women's groups are examples. All these institutions are designed to improve production and consumption in a given rural community. A rural development strategy then is a strategy aimed at improving production, consumption and the ways in which these two are linked. A rural development strategy moreover is initiated by the central government and can therefore be seen as a relationship between the central government and rural communities in Ciskei. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
Protection from beetle-predation in cochineal insects (Dactylopiidae : Homoptera)
- Authors: Morrison, John Frederick
- Date: 1984
- Subjects: Cochineal insect , Homoptera
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5819 , http://hdl.handle.net/10962/d1007282 , Cochineal insect , Homoptera
- Description: From introduction: In South Africa the native ladybird beetle Exochomus flaviventris Mader feeds on the introduced cochineal insect Dactylopius opuntiae (Cockerell) (Pettey, 1943, 1946, 1948; Geyer, 1947 a, b; Pettey and Marais, 1950). It has also been reported to feed on Dactylopius austrinus Lindley (Geyer, 1947 a; Pettey, 1948), but this appears to occur rarely in the field (H.G. Zimmermann and H.G. Robertson pers. camm. ; Appendix 1 ). This thesis attempts to determine why E. flaviventris feeds on D. opuntiae in the field but not on D. austrinus.
- Full Text:
- Authors: Morrison, John Frederick
- Date: 1984
- Subjects: Cochineal insect , Homoptera
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5819 , http://hdl.handle.net/10962/d1007282 , Cochineal insect , Homoptera
- Description: From introduction: In South Africa the native ladybird beetle Exochomus flaviventris Mader feeds on the introduced cochineal insect Dactylopius opuntiae (Cockerell) (Pettey, 1943, 1946, 1948; Geyer, 1947 a, b; Pettey and Marais, 1950). It has also been reported to feed on Dactylopius austrinus Lindley (Geyer, 1947 a; Pettey, 1948), but this appears to occur rarely in the field (H.G. Zimmermann and H.G. Robertson pers. camm. ; Appendix 1 ). This thesis attempts to determine why E. flaviventris feeds on D. opuntiae in the field but not on D. austrinus.
- Full Text:
Public utility pricing and industrial decentralization in South Africa
- Authors: Wallis, Joseph Lyall
- Date: 1984
- Subjects: Industrial management -- South Africa Public utilities -- South Africa Pricing -- South Africa Decentralization in management -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1030 , http://hdl.handle.net/10962/d1003747
- Description: From Introduction: 1. Background to the thesis: During the 1950' sand 1960' s it would appear that the explicit objectives of economic policy in South Africa were full employment and economic growth with some occasional emphasis on the pursuit of relative price stability. Other goals such as efficiency in resource allocation and the pursuit of an "acceptable" income distribution were at best implicit and subordinate to these objectives. This is exemplified by the fact that a number of key prices which were controlled by the authorities such as the exchange rate, interest rates and public utility tariffs were generally set at levels which were either over- or under-priced relative to factor scarcities throughout this period.
- Full Text:
- Authors: Wallis, Joseph Lyall
- Date: 1984
- Subjects: Industrial management -- South Africa Public utilities -- South Africa Pricing -- South Africa Decentralization in management -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1030 , http://hdl.handle.net/10962/d1003747
- Description: From Introduction: 1. Background to the thesis: During the 1950' sand 1960' s it would appear that the explicit objectives of economic policy in South Africa were full employment and economic growth with some occasional emphasis on the pursuit of relative price stability. Other goals such as efficiency in resource allocation and the pursuit of an "acceptable" income distribution were at best implicit and subordinate to these objectives. This is exemplified by the fact that a number of key prices which were controlled by the authorities such as the exchange rate, interest rates and public utility tariffs were generally set at levels which were either over- or under-priced relative to factor scarcities throughout this period.
- Full Text:
Regional geochemistry of the Karoo igneous province
- Duncan, Andrew R, Erlank, Anthony J, Marsh, Julian S
- Authors: Duncan, Andrew R , Erlank, Anthony J , Marsh, Julian S
- Date: 1984
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/134154 , vital:37079 , https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecordamp;RN=15001076
- Description: The extrusive and intrusive rocks of the Karoo Igneous Province are dominantly of basaltic or rhyolitic (sensu lato) composition. There are, however, a considerable variety of other rock types within the province including picritic basalts, nephelinites, shoshonites, latites, andesites and dacites. This paper deals with the geochemistry of the Karoo igneous province.
- Full Text:
- Authors: Duncan, Andrew R , Erlank, Anthony J , Marsh, Julian S
- Date: 1984
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/134154 , vital:37079 , https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecordamp;RN=15001076
- Description: The extrusive and intrusive rocks of the Karoo Igneous Province are dominantly of basaltic or rhyolitic (sensu lato) composition. There are, however, a considerable variety of other rock types within the province including picritic basalts, nephelinites, shoshonites, latites, andesites and dacites. This paper deals with the geochemistry of the Karoo igneous province.
- Full Text:
Resource partitioning by top predatory teleosts in eastern Cape coastal waters (South Africa)
- Authors: Smale, Malcolm J
- Date: 1984
- Subjects: Osteichthyes -- Nutrition Osteichthyes -- Behavior
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5210 , http://hdl.handle.net/10962/d1004775
- Description: A detailed feeding study of eleven inshore top predatory teleosts in the eastern Cape is presented. Material collected largely from line-caught fish was augmented by spearfishing. The predators were grouped according to habitat: pelagic, soft-sediment demersal and reef species. Pelagic fish examined were Lichia amia, Pomatomus saltatrix, Seriola lalandi, Atractoscion aequidens, Katsuwonus pelamis and Thunnus albacares. Stomach content analyses revealed that their prey varied according to size and between species. In coastal areas important prey species were Sardinops ocellata, Etrumeus teres, Engraulis capensis and Loligo reynaudi. The use of fish otoliths and squid beaks allowed accurate identification of the prey and their measurement provided details of their size composition. This has provided greater insight into the distribution of prey species and their importance in food webs. The principal large predator of shallow coastal soft substrates is Argyrosomus hololepidotus, which takes pelagic and demersal prey. Important prey of small specimens are mysids, whereas fish and squid become more important in the diet of larger specimens (>300 mm). Fish prey include Sardinops ocellata, Engraulis capensis, Pomadasys olivaceum and A. hololepidotus. Loligo reynaudi is the dominant cephalopod prey. Selectivity of A. hololepidotus was investigated. Prey were compared to catches made during a small-mesh trawl survey. The absence of certain species from the diet suggests that they avoid predation, possibly by outswimming A. hololepidotus (e.g. P. saltatrix) while large Galeichthys feliceps are rare in the diet, probably because of their formidable spines. Flatfishes, P. olivaceum, juvenile G. feliceps and small A. hololepidotus appear to be preferred food items. The depth distribution of predators and prey is described, and it appears that the distribution of predators may be influenced by their prey. Top predatory teleosts inhabiting coastal reefs are Cheimerius nufar, Petrus rupestris, Polysteganus praeorbitalis and Epinephelus guaza. Diet changes with size and locality but comprises small reef fishes for most of the sparids. C. nufar takes pelagic fish and squid more than the other predators while P. rupestris and P. praeorbitalis prey on cheilodactylids, clinids and other reef associated prey predominantly. E. guaza takes principally crabs and octopods. Classification and ordination analyses of the prey taken illustrated the inter-relationships of predators, which change with increasing size. The pelagic predators are most similar to each other and A. hololepidotus is closer to this group than to reef predators. The reef predators are less similar to each other, although this group as a whole is segregated from pelagic predators. Exceptions to this are large C. nufar and large P. praeorbitalis, which fall into the pelagic predator group, as they took pelagic prey to a large extent. These results are discussed and the patterns shown are compared to other studies and current resource partitioning theory. Two food webs are provided for the coastal waters of the eastern Cape. The pelagic food web has clupeids, engraulids and L. reynaudi as principal components. The reef system is more complex and the Clinidae, Cheilodactylidae and Octopus spp. are important. The use of food webs in management and in providing a framework for testing theoretical models is shown to be important. Research needs are identified and include more detailed work on the basic biology and ecology of the top predators and their prey.
- Full Text:
- Authors: Smale, Malcolm J
- Date: 1984
- Subjects: Osteichthyes -- Nutrition Osteichthyes -- Behavior
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5210 , http://hdl.handle.net/10962/d1004775
- Description: A detailed feeding study of eleven inshore top predatory teleosts in the eastern Cape is presented. Material collected largely from line-caught fish was augmented by spearfishing. The predators were grouped according to habitat: pelagic, soft-sediment demersal and reef species. Pelagic fish examined were Lichia amia, Pomatomus saltatrix, Seriola lalandi, Atractoscion aequidens, Katsuwonus pelamis and Thunnus albacares. Stomach content analyses revealed that their prey varied according to size and between species. In coastal areas important prey species were Sardinops ocellata, Etrumeus teres, Engraulis capensis and Loligo reynaudi. The use of fish otoliths and squid beaks allowed accurate identification of the prey and their measurement provided details of their size composition. This has provided greater insight into the distribution of prey species and their importance in food webs. The principal large predator of shallow coastal soft substrates is Argyrosomus hololepidotus, which takes pelagic and demersal prey. Important prey of small specimens are mysids, whereas fish and squid become more important in the diet of larger specimens (>300 mm). Fish prey include Sardinops ocellata, Engraulis capensis, Pomadasys olivaceum and A. hololepidotus. Loligo reynaudi is the dominant cephalopod prey. Selectivity of A. hololepidotus was investigated. Prey were compared to catches made during a small-mesh trawl survey. The absence of certain species from the diet suggests that they avoid predation, possibly by outswimming A. hololepidotus (e.g. P. saltatrix) while large Galeichthys feliceps are rare in the diet, probably because of their formidable spines. Flatfishes, P. olivaceum, juvenile G. feliceps and small A. hololepidotus appear to be preferred food items. The depth distribution of predators and prey is described, and it appears that the distribution of predators may be influenced by their prey. Top predatory teleosts inhabiting coastal reefs are Cheimerius nufar, Petrus rupestris, Polysteganus praeorbitalis and Epinephelus guaza. Diet changes with size and locality but comprises small reef fishes for most of the sparids. C. nufar takes pelagic fish and squid more than the other predators while P. rupestris and P. praeorbitalis prey on cheilodactylids, clinids and other reef associated prey predominantly. E. guaza takes principally crabs and octopods. Classification and ordination analyses of the prey taken illustrated the inter-relationships of predators, which change with increasing size. The pelagic predators are most similar to each other and A. hololepidotus is closer to this group than to reef predators. The reef predators are less similar to each other, although this group as a whole is segregated from pelagic predators. Exceptions to this are large C. nufar and large P. praeorbitalis, which fall into the pelagic predator group, as they took pelagic prey to a large extent. These results are discussed and the patterns shown are compared to other studies and current resource partitioning theory. Two food webs are provided for the coastal waters of the eastern Cape. The pelagic food web has clupeids, engraulids and L. reynaudi as principal components. The reef system is more complex and the Clinidae, Cheilodactylidae and Octopus spp. are important. The use of food webs in management and in providing a framework for testing theoretical models is shown to be important. Research needs are identified and include more detailed work on the basic biology and ecology of the top predators and their prey.
- Full Text:
Rhodes University 1984 Graduation Ceremonies Address
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7464 , http://hdl.handle.net/10962/d1018341
- Full Text:
- Authors: Henderson, Derek Scott
- Date: 1984
- Language: English
- Type: Text
- Identifier: vital:7464 , http://hdl.handle.net/10962/d1018341
- Full Text:
Rhodes University Graduation Ceremony 1984
- Authors: Rhodes University
- Date: 1984
- Language: English
- Type: text
- Identifier: vital:8115 , http://hdl.handle.net/10962/d1004573
- Description: Rhodes University Graduation Ceremonies on Friday, 13 April 1984 at 8 p.m. [and] on Saturday, 14 April 1984 at 10 a.m. in the 1820 Settlers National Monument.
- Full Text:
- Authors: Rhodes University
- Date: 1984
- Language: English
- Type: text
- Identifier: vital:8115 , http://hdl.handle.net/10962/d1004573
- Description: Rhodes University Graduation Ceremonies on Friday, 13 April 1984 at 8 p.m. [and] on Saturday, 14 April 1984 at 10 a.m. in the 1820 Settlers National Monument.
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Serotonin binding in vitro by releasable proteins from human blood platelets
- Authors: Heemstra, Valerie Lawrence
- Date: 1984 , 2013-04-10
- Subjects: Serotonin , Serotonin -- Metabolism
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3829 , http://hdl.handle.net/10962/d1007215 , Serotonin , Serotonin -- Metabolism
- Description: Among the substances released from human blood platelets are serotonin and various proteins. It was hypothesized that one of these proteins binds serotonin and that serotonin might be important to the protein's function or that the protein might be important to serotonin's function. Two platelet-specific proteins, platelet factor 4 (PF4) and ß-thromboglobulin ( ßTG) were found to bind serotonin in vitro. Endogenous PF4 was isolated by serotonin-affinity chromatography and was identified by radioimmunoassay. Purified l¹²⁵ I] -PF4 and native PF4 bound to and eluted from a serotonin-affinity column similarly. Ultrafiltration of the homologous protein, (ßTG, with [¹⁴C]-serotonin demonstrated binding of about 8 moles serotonin per mole tetrameric ßTG with a dissociation con stant of about 4 x 10-8ThesisThesis⁻⁸ M. Equilibrium dialysis of PF4 with radiolabelled serotonin was attempted, but no binding constant values were obtained because serotonin apparently bound to the dialysis membrane. Since EDTA was one of the two agents that eluted PF4 from the serotonin-affinity gel, calcium binding by -PF4 was investigated by equilibrium dialysis. Evidence was obtained for positively cooperative binding of calcium ions by PF4. It is concluded that PF4 and ßTG bind serotonin in vitro, that they may also bind in vivo when platelets undergo release, and that the functions of serotonin, PF4 and ßTG may be mediated in part by serotonin-protein associations. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
- Full Text:
- Authors: Heemstra, Valerie Lawrence
- Date: 1984 , 2013-04-10
- Subjects: Serotonin , Serotonin -- Metabolism
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3829 , http://hdl.handle.net/10962/d1007215 , Serotonin , Serotonin -- Metabolism
- Description: Among the substances released from human blood platelets are serotonin and various proteins. It was hypothesized that one of these proteins binds serotonin and that serotonin might be important to the protein's function or that the protein might be important to serotonin's function. Two platelet-specific proteins, platelet factor 4 (PF4) and ß-thromboglobulin ( ßTG) were found to bind serotonin in vitro. Endogenous PF4 was isolated by serotonin-affinity chromatography and was identified by radioimmunoassay. Purified l¹²⁵ I] -PF4 and native PF4 bound to and eluted from a serotonin-affinity column similarly. Ultrafiltration of the homologous protein, (ßTG, with [¹⁴C]-serotonin demonstrated binding of about 8 moles serotonin per mole tetrameric ßTG with a dissociation con stant of about 4 x 10-8ThesisThesis⁻⁸ M. Equilibrium dialysis of PF4 with radiolabelled serotonin was attempted, but no binding constant values were obtained because serotonin apparently bound to the dialysis membrane. Since EDTA was one of the two agents that eluted PF4 from the serotonin-affinity gel, calcium binding by -PF4 was investigated by equilibrium dialysis. Evidence was obtained for positively cooperative binding of calcium ions by PF4. It is concluded that PF4 and ßTG bind serotonin in vitro, that they may also bind in vivo when platelets undergo release, and that the functions of serotonin, PF4 and ßTG may be mediated in part by serotonin-protein associations. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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Some aspects of the African mission policy of the Presbytery of Adelaide/Port Elizabeth with special reference to the origin and development of the New Brighton Presbyterian Mission Church, 1898-1962
- Authors: Hunter, Celene Frances Dill
- Date: 1984
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1228 , http://hdl.handle.net/10962/d1007225
- Full Text:
- Authors: Hunter, Celene Frances Dill
- Date: 1984
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1228 , http://hdl.handle.net/10962/d1007225
- Full Text:
Some aspects of the teaching of English as a main language at the secondary level with special reference to the question of 'language'
- Authors: Crampton, Michael Edward
- Date: 1984
- Subjects: English language -- Study and teaching (Secondary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1873 , http://hdl.handle.net/10962/d1004926
- Description: From Introduction: A training in English literature followed by a limited number of English method lectures on how to teach a prescribed Victorian novel proved inadequate in these circumstances. Moreover, several years of interaction with colleagues in staff rooms, conferences and seminars in England and South Africa failed to yield a secure sense of purpose or a confident understanding of why, when and how to teach what in the English lesson. Too many amateurs are employed to teach English. Barn dancers might as well teach ballet. Yet for all that, there grew a conviction, reinforced by the vital involvement of many inspiring colleagues, that English teaching is the mainspring of the educational process where that language is the medium of education. The hope of making some contribution to the advancement of the English teaching profession, especially for the benefit of those who look up, hoping to learn, is sufficient motivation for this work. The endeavour will be, in the first place, to review some traditional aspects of English teaching in their historical context. A description of the traditional sources upon which the profession intuitively draws might assist in explaining the existence of certain attitudes. In chapters 2-4 an analysis of current thinking, directions and practices will aim to explore some aspects of what English teaching in schools is, when and how it happens and to what end. The direction in which the profession is moving will be weighed against the relevance of school English in the further learning experiences of school leavers before conclusions and recommendations are listed. Throughout, the purpose will be to contribute insights into the practice of teaching English as a main language. The term 'main language' has been deliberately chosen. Growing numbers of South Africans might be described as English L2 'main language' speakers in the sense that though Afrikaans, Zulu, Xhosa or Gujarati might be regarded as their 'first' language , English is the language which they mainly use in the ordinary business of life, in the home, at work and at play. The situation is fluid and interactive. Many adult speakers are in the process of assuming English as a main language. Small groups at work (and increasingly in lecture halls and classrooms) might, in learning contexts use English mainly as a means of interaction but include a variety of native Ianguage speakers from Armenian to ZuIu. The concept of English as a 'main' as distinct from 'first' or 'second' language seems to be gaining fresh significance. The fact that it is no longer safe to assume that main language English speakers will all be drawn from uniform speech communities, has major implications for the teaching of the subject; implications that will rapidly become more significant with the eradication of apartheid from our society. In this study, focus will be upon the teaching of the subject at the secondary level. Within that area particular emphasis will fall upon the final three years of schooling. With the approach of the matriculation examination many schools begin to rattle their shackles, bringing 'English specialists' to bear on prescribed works and increasing the intensity of tests and mock examinations. The leisurely dalliance with projects and casual affairs with creative work associated with English in the early years, can be forgotten as attention is confined with increasing intensity on possible examination questions . Thus the opportunity to finish what has been begun is often wasted. Where added impetus and direction could be given in the final years to interest, enjoyment and abilities fostered at primary and junior secondary levels, preoccupation with an irrelevant literary erudition, with disjointed comprehension passages and spurious essay topics, can stifle natural growth. On the other hand it must be acknowledged that the impetus provided by the final examination can channel energy and produce insights that might otherwise have remained dormant. Thus, while the final three years of schooling are educationally no more important than any other phase in the twelve years schooling, they do III involve important issues within the writer's range of experience.
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- Authors: Crampton, Michael Edward
- Date: 1984
- Subjects: English language -- Study and teaching (Secondary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1873 , http://hdl.handle.net/10962/d1004926
- Description: From Introduction: A training in English literature followed by a limited number of English method lectures on how to teach a prescribed Victorian novel proved inadequate in these circumstances. Moreover, several years of interaction with colleagues in staff rooms, conferences and seminars in England and South Africa failed to yield a secure sense of purpose or a confident understanding of why, when and how to teach what in the English lesson. Too many amateurs are employed to teach English. Barn dancers might as well teach ballet. Yet for all that, there grew a conviction, reinforced by the vital involvement of many inspiring colleagues, that English teaching is the mainspring of the educational process where that language is the medium of education. The hope of making some contribution to the advancement of the English teaching profession, especially for the benefit of those who look up, hoping to learn, is sufficient motivation for this work. The endeavour will be, in the first place, to review some traditional aspects of English teaching in their historical context. A description of the traditional sources upon which the profession intuitively draws might assist in explaining the existence of certain attitudes. In chapters 2-4 an analysis of current thinking, directions and practices will aim to explore some aspects of what English teaching in schools is, when and how it happens and to what end. The direction in which the profession is moving will be weighed against the relevance of school English in the further learning experiences of school leavers before conclusions and recommendations are listed. Throughout, the purpose will be to contribute insights into the practice of teaching English as a main language. The term 'main language' has been deliberately chosen. Growing numbers of South Africans might be described as English L2 'main language' speakers in the sense that though Afrikaans, Zulu, Xhosa or Gujarati might be regarded as their 'first' language , English is the language which they mainly use in the ordinary business of life, in the home, at work and at play. The situation is fluid and interactive. Many adult speakers are in the process of assuming English as a main language. Small groups at work (and increasingly in lecture halls and classrooms) might, in learning contexts use English mainly as a means of interaction but include a variety of native Ianguage speakers from Armenian to ZuIu. The concept of English as a 'main' as distinct from 'first' or 'second' language seems to be gaining fresh significance. The fact that it is no longer safe to assume that main language English speakers will all be drawn from uniform speech communities, has major implications for the teaching of the subject; implications that will rapidly become more significant with the eradication of apartheid from our society. In this study, focus will be upon the teaching of the subject at the secondary level. Within that area particular emphasis will fall upon the final three years of schooling. With the approach of the matriculation examination many schools begin to rattle their shackles, bringing 'English specialists' to bear on prescribed works and increasing the intensity of tests and mock examinations. The leisurely dalliance with projects and casual affairs with creative work associated with English in the early years, can be forgotten as attention is confined with increasing intensity on possible examination questions . Thus the opportunity to finish what has been begun is often wasted. Where added impetus and direction could be given in the final years to interest, enjoyment and abilities fostered at primary and junior secondary levels, preoccupation with an irrelevant literary erudition, with disjointed comprehension passages and spurious essay topics, can stifle natural growth. On the other hand it must be acknowledged that the impetus provided by the final examination can channel energy and produce insights that might otherwise have remained dormant. Thus, while the final three years of schooling are educationally no more important than any other phase in the twelve years schooling, they do III involve important issues within the writer's range of experience.
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Somewhat strange : a study of the relationships between text and music in English song, 1588-1789
- Hutchings, Geoffrey Justin Mackay
- Authors: Hutchings, Geoffrey Justin Mackay
- Date: 1984
- Subjects: Songs, English -- 16th century -- HIstory and criticism Songs, English -- 17th century -- HIstory and criticism
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2670 , http://hdl.handle.net/10962/d1006978
- Description: This study is concerned with the ways in which linguistic texts combine with music to form song, essentially an art of relationship. It argues that the relationship has never been a very stable one outside folk song, and traces the development of the relationship in English song from the appearance of the first English madrigals in 1588 to the death of G F Handel in 1759. The different sorts of relationship during this period are discussed in detail, with particular attention being paid to the sort of lyric poetry that is most suitable for musical setting. The conclusion is reached that, in the art of setting a poem to music, the late Elizabethan masters, Thomas Campion and John Dowlland, were supreme in the period under discussion. After them, the aevelopment of a new system of tonality and of denser textures of accompaniment resulted in music's assumption of a more and more Dominant role in the relationship to the neglect and detriment of poetic text.
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- Authors: Hutchings, Geoffrey Justin Mackay
- Date: 1984
- Subjects: Songs, English -- 16th century -- HIstory and criticism Songs, English -- 17th century -- HIstory and criticism
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2670 , http://hdl.handle.net/10962/d1006978
- Description: This study is concerned with the ways in which linguistic texts combine with music to form song, essentially an art of relationship. It argues that the relationship has never been a very stable one outside folk song, and traces the development of the relationship in English song from the appearance of the first English madrigals in 1588 to the death of G F Handel in 1759. The different sorts of relationship during this period are discussed in detail, with particular attention being paid to the sort of lyric poetry that is most suitable for musical setting. The conclusion is reached that, in the art of setting a poem to music, the late Elizabethan masters, Thomas Campion and John Dowlland, were supreme in the period under discussion. After them, the aevelopment of a new system of tonality and of denser textures of accompaniment resulted in music's assumption of a more and more Dominant role in the relationship to the neglect and detriment of poetic text.
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South African farm wages and working conditions: with special reference to the Albany district, 1957 to 1977
- Authors: Antrobus, Geoffrey Gordon
- Date: 1984
- Subjects: Agricultural wages -- South Africa -- Eastern Cape , Agricultural laborers -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1028 , http://hdl.handle.net/10962/d1003722
- Description: The focus of the study is the wages and working conditions of farm labourers in commercial agriculture. After an outline examination of the broad trends in employment and wages in the agricultural industry as a whole, the emphasis falls on a micro-study of employment practices in the Eastern Cape magisterial district of Albany. The results of a survey of farmers was used to determine the level of wages, including payments in kind, the value of housing, cropping and grazing rights. It was found that cash wages made up only 25% of the total remuneration of R684 per annum, while purchased and farm produced rations made up a further 40% of the total. A survey conducted in the Albany district two decades previously was used to compare the real earnings in 1957 and 1977. Although real cash wages and rations increased over the twenty year period the restriction of cropping and grazing rights had the effect of keeping real earnings static. In the light of the improvement of other working conditions, such as the reduction in working hours, however, it is concluded that some increase in real wages did occur . It is evident that there are no clear-cut recipes for successful farm labour management and no unequivocal statements should be made about the most visible element, namely cash wages.
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- Authors: Antrobus, Geoffrey Gordon
- Date: 1984
- Subjects: Agricultural wages -- South Africa -- Eastern Cape , Agricultural laborers -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1028 , http://hdl.handle.net/10962/d1003722
- Description: The focus of the study is the wages and working conditions of farm labourers in commercial agriculture. After an outline examination of the broad trends in employment and wages in the agricultural industry as a whole, the emphasis falls on a micro-study of employment practices in the Eastern Cape magisterial district of Albany. The results of a survey of farmers was used to determine the level of wages, including payments in kind, the value of housing, cropping and grazing rights. It was found that cash wages made up only 25% of the total remuneration of R684 per annum, while purchased and farm produced rations made up a further 40% of the total. A survey conducted in the Albany district two decades previously was used to compare the real earnings in 1957 and 1977. Although real cash wages and rations increased over the twenty year period the restriction of cropping and grazing rights had the effect of keeping real earnings static. In the light of the improvement of other working conditions, such as the reduction in working hours, however, it is concluded that some increase in real wages did occur . It is evident that there are no clear-cut recipes for successful farm labour management and no unequivocal statements should be made about the most visible element, namely cash wages.
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Strontium isotope characterization of Karoo volcanic rocks
- Bristow, J W, Allsopp, H L, Erlank, Anthony J, Marsh, Julian S, Armstrong, R A
- Authors: Bristow, J W , Allsopp, H L , Erlank, Anthony J , Marsh, Julian S , Armstrong, R A
- Date: 1984
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/134176 , vital:37081 , https://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetailamp;idt=6453595
- Description: Karoo volcanics of both mafic and felsic composition cover large areas of southern Africa, and are characterized by considerable ranges in their initial 87Sr/86Sr (i.e. Ro) ratios. Mafic volcanics from the eastern and western continental margins show the greatest range in Ro ratios, i.e. Lebombo-Nuanetsi area: 0.7035-0.7134 and Etendeka: 0.7030-0.7135 respectively. In the Central Karoo area the mafic rocks show a smaller spread of ratios: 0.7046-0.7094.
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- Authors: Bristow, J W , Allsopp, H L , Erlank, Anthony J , Marsh, Julian S , Armstrong, R A
- Date: 1984
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/134176 , vital:37081 , https://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetailamp;idt=6453595
- Description: Karoo volcanics of both mafic and felsic composition cover large areas of southern Africa, and are characterized by considerable ranges in their initial 87Sr/86Sr (i.e. Ro) ratios. Mafic volcanics from the eastern and western continental margins show the greatest range in Ro ratios, i.e. Lebombo-Nuanetsi area: 0.7035-0.7134 and Etendeka: 0.7030-0.7135 respectively. In the Central Karoo area the mafic rocks show a smaller spread of ratios: 0.7046-0.7094.
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study of the personality of Franz Liszt with special reference to the contradictions in his nature
- Authors: Ensor-Smith, Beryl Eileen
- Date: 1984
- Subjects: Liszt, Franz, 1811-1886
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2691 , http://hdl.handle.net/10962/d1013323
- Full Text:
- Authors: Ensor-Smith, Beryl Eileen
- Date: 1984
- Subjects: Liszt, Franz, 1811-1886
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2691 , http://hdl.handle.net/10962/d1013323
- Full Text: