In vitro effects of three organic calcium channel blockers on the rat pineal gland
- Authors: Brown, Clint
- Date: 1992
- Subjects: Calcium -- Antagonists , Pineal gland -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3745 , http://hdl.handle.net/10962/d1003223 , Calcium -- Antagonists , Pineal gland -- Research
- Description: The calcium signal has emerged as an imponant component of intracellular regulation. Pineal function was thought to be slowed by the prominent calcification seen with increasing age, but recently it has been shown that calcium plays a crucial role in the adrenergic regulation of the gland. Beta-adrenoceptor stimulation increases melatonin (aMT) synthesis by increasing the activity of cyclic 3 '-5' adenosine mono phosphate (cAMP). Cyclic-AMP regulates the production of the pineal hormone, melatonin, from serotonin via the rate-limiting enzyme N-acetyltransferase (NAT). Increased intracellular cAMP is essential to the adrenergic induction of NAT. Noradrenaline(NA)also elevates pinealocyte cyclic guanosine monophosphate (cGMP). Adrenergic regulation of these cyclic nucleotides involves both α₁ - and β-adrenoceptors. Beta-adrenoceptor stimulation is an absolute requirement. Alphal-adrenoceptor activation, which is ineffective alone, serves to amplify the β-stimulated cAMP and cGMP responses via a positive effect on a Ca²⁺⁻/ phospholipiddependent protein kinase (Protein kinase-C) and a net influx of Ca²⁺ into the pinealocyte. Previous studies suggest the use of organic calcium channel blockers (CCBs) as probes of calcium-mediated processes. Applying this concept, the study set out to investigate the influence of a representative of each of the structurally diverse groups of calcium channel blockers viz. verapamil, diltiazem and nifedipine, and to examine their effect on β-adrenoceptor stimulation. It used the β-agonist isoprenaline (ISO) and the mixed [α₁/β]agonist noradrenaline (NA), for its combined [α₁/β]adrenoceptor stimulation, on agonist-induced increases in the production of radio-labelled aMT and N-acetylserotonin(aHT) -measured as the sum of N-acetylated product- from [¹⁴C] serotonin. This was done using organ cultures of rat pineal glands. It was speciously assumed that this drug paradigm would allow the determination of Ca²⁺ influx and/or the blocking thereof in the reported potentiation by using ISO as a non Ca²⁺ -entry stimulating agonist, compared with NA and its Ca²⁺ -entry stimulating properties. Surprisingly, all 3 CCB's potentiated the effect of NA. Only diltiazem was found not to potentiate the effect of ISO. In an attempt to uncover the reason for these results, the study moved toward a mechanistic approach,focusing in an antecedent manner on the various steps in the indole metabolic pathway to identify the point at which the change occurred, and hence possibly elucidate the mechanism responsible for the paradoxical increase. Experiments which assayed the levels of NAT, under the same drug conditions, showed the paradoxical increase to be already evident at this stage. Secondary experiments confirmed that NA stimulation of the pineal is dependent on Ca²⁺, both in organ culture and with NAT: the Ca²⁺ chelator EGTA abolished adrenergically-induced stimulation, while Ca²⁺ added after EGTA, restored the enzyme activity. The ionophore A23187 (which is able to transport Ca²⁺ directly into the pinealocyte via a mechanism which differs from the α₁ - mechanism) when used in conjunction with ISO or NA, was able to potentiate the responses of these two agonists relative to control values (agonist-alone), but by itself had no effect. With the enzyme NAT critically dependent upon cAMP for its induction, it was decided to determine the levels of cAMP and then those of its regulator, cAMP-phosphodiesterase (cAMP-PDE). This reasoning was prompted by reports of anti-calmodulin activity shown by the CCBs, in addition to their channel blocking effects. By binding to calmodulin (CaM), the CCBs are reportedly able to inhibit the CaM-dependent activation of cAMP-PDE. Following NA stimulation, verapamil caused a significant decrease in cAMP-PDE levels and an increase in cAMP. The other CCBs showed a similar trend. Glands stimulated with ISO in the presence of verapamil and nifedipine showed no significant differences in cAMP or cAMP-PDE levels. Diltiazem, however, was found to decrease the effect of ISO on cAMP while causing a concomitant increase in cAMP-PDE. This i) supported a possible hypothesis that the observed enhancement is a result of cAMP levels remaining elevated due to an inhibition of cAMP-PDE by the CCEs and ii) pointed to the possible presence of a CaM-sensitive PDE within the rat pineal gland. To test this hypothesis, two drugs which are more specific in their actions on CaM effects were chosen to see if the earlier results could be mimicked and thereby confirmed. Glands stimulated with NA in the presence of the specific CaM inhibitor R 24571 showed increased NAT activity and [¹⁴C]-aMT production. cAMP-PDE levels were clearly down, thus corroborating the possibility of cAMP-PDE inhibition. Glands incubated in the presence of M&B 22948, a CaM-sensitive PDE inhibitor, showed similar increases in NAT activity and [¹⁴C]-aMT. These findings therefore support the initial results and although indirect, confirm the hypothesis that the paradoxical increase following predominantly NA stimulation could be a result of cAMP levels remaining elevated, due to inhibition by the CCEs of the CaM-dependent activation of its regulator cAMP-PDE. In summary, data presented herein concur with proposals that: i) the CCEs are not specific enough to be used as tools to research Ca²⁺ -mediated events, as they appear to have sites of action other than the voltage operated channel (VOC); eg. binding to calmodulin, ii) there are functional differences between the CCEs as shown by diltiazem in this series of experiments, iii) there is a CaM-sensitive-PDE present in the pineal.
- Full Text:
- Date Issued: 1992
- Authors: Brown, Clint
- Date: 1992
- Subjects: Calcium -- Antagonists , Pineal gland -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3745 , http://hdl.handle.net/10962/d1003223 , Calcium -- Antagonists , Pineal gland -- Research
- Description: The calcium signal has emerged as an imponant component of intracellular regulation. Pineal function was thought to be slowed by the prominent calcification seen with increasing age, but recently it has been shown that calcium plays a crucial role in the adrenergic regulation of the gland. Beta-adrenoceptor stimulation increases melatonin (aMT) synthesis by increasing the activity of cyclic 3 '-5' adenosine mono phosphate (cAMP). Cyclic-AMP regulates the production of the pineal hormone, melatonin, from serotonin via the rate-limiting enzyme N-acetyltransferase (NAT). Increased intracellular cAMP is essential to the adrenergic induction of NAT. Noradrenaline(NA)also elevates pinealocyte cyclic guanosine monophosphate (cGMP). Adrenergic regulation of these cyclic nucleotides involves both α₁ - and β-adrenoceptors. Beta-adrenoceptor stimulation is an absolute requirement. Alphal-adrenoceptor activation, which is ineffective alone, serves to amplify the β-stimulated cAMP and cGMP responses via a positive effect on a Ca²⁺⁻/ phospholipiddependent protein kinase (Protein kinase-C) and a net influx of Ca²⁺ into the pinealocyte. Previous studies suggest the use of organic calcium channel blockers (CCBs) as probes of calcium-mediated processes. Applying this concept, the study set out to investigate the influence of a representative of each of the structurally diverse groups of calcium channel blockers viz. verapamil, diltiazem and nifedipine, and to examine their effect on β-adrenoceptor stimulation. It used the β-agonist isoprenaline (ISO) and the mixed [α₁/β]agonist noradrenaline (NA), for its combined [α₁/β]adrenoceptor stimulation, on agonist-induced increases in the production of radio-labelled aMT and N-acetylserotonin(aHT) -measured as the sum of N-acetylated product- from [¹⁴C] serotonin. This was done using organ cultures of rat pineal glands. It was speciously assumed that this drug paradigm would allow the determination of Ca²⁺ influx and/or the blocking thereof in the reported potentiation by using ISO as a non Ca²⁺ -entry stimulating agonist, compared with NA and its Ca²⁺ -entry stimulating properties. Surprisingly, all 3 CCB's potentiated the effect of NA. Only diltiazem was found not to potentiate the effect of ISO. In an attempt to uncover the reason for these results, the study moved toward a mechanistic approach,focusing in an antecedent manner on the various steps in the indole metabolic pathway to identify the point at which the change occurred, and hence possibly elucidate the mechanism responsible for the paradoxical increase. Experiments which assayed the levels of NAT, under the same drug conditions, showed the paradoxical increase to be already evident at this stage. Secondary experiments confirmed that NA stimulation of the pineal is dependent on Ca²⁺, both in organ culture and with NAT: the Ca²⁺ chelator EGTA abolished adrenergically-induced stimulation, while Ca²⁺ added after EGTA, restored the enzyme activity. The ionophore A23187 (which is able to transport Ca²⁺ directly into the pinealocyte via a mechanism which differs from the α₁ - mechanism) when used in conjunction with ISO or NA, was able to potentiate the responses of these two agonists relative to control values (agonist-alone), but by itself had no effect. With the enzyme NAT critically dependent upon cAMP for its induction, it was decided to determine the levels of cAMP and then those of its regulator, cAMP-phosphodiesterase (cAMP-PDE). This reasoning was prompted by reports of anti-calmodulin activity shown by the CCBs, in addition to their channel blocking effects. By binding to calmodulin (CaM), the CCBs are reportedly able to inhibit the CaM-dependent activation of cAMP-PDE. Following NA stimulation, verapamil caused a significant decrease in cAMP-PDE levels and an increase in cAMP. The other CCBs showed a similar trend. Glands stimulated with ISO in the presence of verapamil and nifedipine showed no significant differences in cAMP or cAMP-PDE levels. Diltiazem, however, was found to decrease the effect of ISO on cAMP while causing a concomitant increase in cAMP-PDE. This i) supported a possible hypothesis that the observed enhancement is a result of cAMP levels remaining elevated due to an inhibition of cAMP-PDE by the CCEs and ii) pointed to the possible presence of a CaM-sensitive PDE within the rat pineal gland. To test this hypothesis, two drugs which are more specific in their actions on CaM effects were chosen to see if the earlier results could be mimicked and thereby confirmed. Glands stimulated with NA in the presence of the specific CaM inhibitor R 24571 showed increased NAT activity and [¹⁴C]-aMT production. cAMP-PDE levels were clearly down, thus corroborating the possibility of cAMP-PDE inhibition. Glands incubated in the presence of M&B 22948, a CaM-sensitive PDE inhibitor, showed similar increases in NAT activity and [¹⁴C]-aMT. These findings therefore support the initial results and although indirect, confirm the hypothesis that the paradoxical increase following predominantly NA stimulation could be a result of cAMP levels remaining elevated, due to inhibition by the CCEs of the CaM-dependent activation of its regulator cAMP-PDE. In summary, data presented herein concur with proposals that: i) the CCEs are not specific enough to be used as tools to research Ca²⁺ -mediated events, as they appear to have sites of action other than the voltage operated channel (VOC); eg. binding to calmodulin, ii) there are functional differences between the CCEs as shown by diltiazem in this series of experiments, iii) there is a CaM-sensitive-PDE present in the pineal.
- Full Text:
- Date Issued: 1992
Industrial social work : an exploration and an assessment of the practice of social work in industry in South Africa
- Authors: Rankin, Pedro
- Date: 1992
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3279 , http://hdl.handle.net/10962/d1006474
- Description: Industries in South Africa have been employing social workers in increasing numbers during the last decade, and in several of the bigger industries social work seem to have succeeded in establishing itself over the course of time. Certain forces seem to be operating in both industry and social work which could facilitate the introduction and development of industrial social work as a specialised field of practice in South Africa. Very significant variables in this regard are a rapidly changing labour force, and certain socio-political developments in South Africa, that took place especially during the last decade, and in particular during the past two years. A lack of knowledge about the practice of social work in industry exists in South Africa, mainly as a result of a general lack of empirical research into this field. The main purpose of this research project was to add to the knowledge about the nature of industrial social work practice in South Africa, and to contribute to an understanding of the forces influencing its development. In order to achieve this overall purpose, an extensive review of the existing literature was done with the aim of identifying and describing the present trends and issues in industrial social work thinking. This was combined with an empirical investigation into the practice of social workers presently employed in industry in South Africa. In addition to this, the attitude of industries not employing social workers was established with a view of determining factors influencing the further development of industrial social work. A third component of the empirical investigation consisted of a survey of the attitudes and knowledge of community welfare organisations regarding industrial social work practice. This was done in an effort to establish the amount of support for industrial social work from the rest of the profession. The findings of the empirical investigation indicated an emphasis on the individual employee as far as the practice of industrial social work is concerned - an EAP model thus. Industries not employing social workers still seem to need more education as far as the true nature of social work practice is concerned, and there seem to be a reserved acceptance of industrial social work practice amongst community welfare organisations, as well as a lack of knowledge. In conclusion it can be stated that the social work fraternity in South Africa should take more serious notice of occupational social work practice in South Africa in general, and of industrial social work practice in particular, mainly because of its importance to the worker.
- Full Text:
- Date Issued: 1992
- Authors: Rankin, Pedro
- Date: 1992
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3279 , http://hdl.handle.net/10962/d1006474
- Description: Industries in South Africa have been employing social workers in increasing numbers during the last decade, and in several of the bigger industries social work seem to have succeeded in establishing itself over the course of time. Certain forces seem to be operating in both industry and social work which could facilitate the introduction and development of industrial social work as a specialised field of practice in South Africa. Very significant variables in this regard are a rapidly changing labour force, and certain socio-political developments in South Africa, that took place especially during the last decade, and in particular during the past two years. A lack of knowledge about the practice of social work in industry exists in South Africa, mainly as a result of a general lack of empirical research into this field. The main purpose of this research project was to add to the knowledge about the nature of industrial social work practice in South Africa, and to contribute to an understanding of the forces influencing its development. In order to achieve this overall purpose, an extensive review of the existing literature was done with the aim of identifying and describing the present trends and issues in industrial social work thinking. This was combined with an empirical investigation into the practice of social workers presently employed in industry in South Africa. In addition to this, the attitude of industries not employing social workers was established with a view of determining factors influencing the further development of industrial social work. A third component of the empirical investigation consisted of a survey of the attitudes and knowledge of community welfare organisations regarding industrial social work practice. This was done in an effort to establish the amount of support for industrial social work from the rest of the profession. The findings of the empirical investigation indicated an emphasis on the individual employee as far as the practice of industrial social work is concerned - an EAP model thus. Industries not employing social workers still seem to need more education as far as the true nature of social work practice is concerned, and there seem to be a reserved acceptance of industrial social work practice amongst community welfare organisations, as well as a lack of knowledge. In conclusion it can be stated that the social work fraternity in South Africa should take more serious notice of occupational social work practice in South Africa in general, and of industrial social work practice in particular, mainly because of its importance to the worker.
- Full Text:
- Date Issued: 1992
Influence of the oil phase dispersion in a cream base on the in vivo release of betamethasone 17-valerate
- Haigh, J M, Smith, E W, Meyer, E, Fassihi, A R
- Authors: Haigh, J M , Smith, E W , Meyer, E , Fassihi, A R
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6365 , http://hdl.handle.net/10962/d1006065
- Description: Release of betamethasone valerate (betamethasone 17-valerate) from 3 extemporaneous cream formulations (1 control, 1 containing propylene glycol, and 1 containing \b/-cyclodextrin) and a commercial cream formulation (Betnovate) was compared using the human skin blanching assay in 12 healthy male volunteers. All 3 extemporaneous formulations showed similar drug release rates, equivalent to or better than the commercial preparation containing betamethasone in a 10 fold higher concentration. Electron microscopic examination showed considerably finer dispersion of the oil phase in the extemporaneous formulations. It was concluded that the increased surface area available for partitioning of betamethasone between the cream and the skin is responsible for the improved topical availability of the drug from the extemporaneous formulations.
- Full Text: false
- Date Issued: 1992
- Authors: Haigh, J M , Smith, E W , Meyer, E , Fassihi, A R
- Date: 1992
- Language: English
- Type: Article
- Identifier: vital:6365 , http://hdl.handle.net/10962/d1006065
- Description: Release of betamethasone valerate (betamethasone 17-valerate) from 3 extemporaneous cream formulations (1 control, 1 containing propylene glycol, and 1 containing \b/-cyclodextrin) and a commercial cream formulation (Betnovate) was compared using the human skin blanching assay in 12 healthy male volunteers. All 3 extemporaneous formulations showed similar drug release rates, equivalent to or better than the commercial preparation containing betamethasone in a 10 fold higher concentration. Electron microscopic examination showed considerably finer dispersion of the oil phase in the extemporaneous formulations. It was concluded that the increased surface area available for partitioning of betamethasone between the cream and the skin is responsible for the improved topical availability of the drug from the extemporaneous formulations.
- Full Text: false
- Date Issued: 1992
Interaction of selected fungicides with insoluble bovine skin collagen in the presence of the non ionic surfactant Triton X-100
- Authors: Fowler, William Mackenzie
- Date: 1992
- Subjects: Collagenases -- Research Fungicides -- Research Hides and skins -- Preservation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4318 , http://hdl.handle.net/10962/d1004976
- Description: In the leather industry fungicides are often used for the protection of wet-blue leather. These fungicides are usually only sparingly soluble and are therefore formulated together with surfactants in order to increase their solubility and to ensure an even distribution over the surface of the hide after treatment. Solutions containing both fungicides and surfactant are complex. The nature of these solutions was investigated. By means of UV/Vis spectroscopy and viscometry it was shown that the surfactant and fungicides form micelles and mixed micelles in solution. The nature of these micelles and mixed micelles was dependent on the solution temperature as well as on the concentrations of the surfactant and fungicides. At the higher temperatures and concentrations transition to large, possibly rod-shaped, mixed micelles occurred. The interaction between the selected fungicides 2-(thiocyanomethylthio)benzothiazole and n-octyl-4-isothiazol-3-one with bovine skin collagen in the form of both limed and lightly chromed hide powder in the presence of the non ionic surfactant Triton X -100 was investigated. Fungicide uptake was determined by difference measurements on the float solutions at regular intervals during treatment. Binding was rapid with equilibrium being established within the first six hours even for the solutions with the highest surfactant concentration. Binding failed to follow a normal mass-action binding-type isotherm approaching a saturation limit, but increased continuously indicating a co-operative effect whereby binding site affinity actually increased with the amount of ligand bound. Binding was accompanied by a drop in the free surfactant in the solution at the higher biocide levels indicating the formation of complex mixed micelles which bind to the collagen fibres. The uptake and antifungal activity of commercial fomulations of the fungicides on chrome-tanned wet-blue leather was investigated at various treatment temperatures. At lower fungicide treatment concentrations, binding tended to follow a typical mass-action type binding isotherm, increasing slightly with temperature. At higher float concentrations, an inflexion point was apparent beyond which uptake showed a marked increase with concentration. This inflexion point, signifying a change in binding characteristics, occurred at progressively lower concentrations with increasing temperature. Antifungal activity in terms of storage periods to onset of fungal growth was determined on the wet-blue leather cuttings immediately after treatment and drainage and also on sample discs after exhaustive extraction of free fungicide using dichloromethane. Storage performance testing of the various treated wet-blue leathers was carried out by different methods. Residual protective periods showed a curvilinear increase with dosage offer and surface uptake. In the low dosage range treatment temperature had only a relatively slight effect in promoting uptake and improving storage protection. At higher dosages, the influence of temperature on uptake and storage protection was greater due to the increase in surface binding of the fungicides at the elevated temperatures. Only a portion of the fungicide uptake was recovered by direct solvent extraction of the treated wet-blue leather. Solvent extraction reduced storage margins. The storage response in relation to fungicide content was, however comparable after extraction, indicating that both irreversibly bound and physically associated fungicide offered effective protection. Results of the study provide further insight into the mode of interaction of fungicide emulsion dispersion with bovine skin collagen, and the importance of the emulsion dispersions and its stability in determining the uptake of fungicide.
- Full Text:
- Date Issued: 1992
- Authors: Fowler, William Mackenzie
- Date: 1992
- Subjects: Collagenases -- Research Fungicides -- Research Hides and skins -- Preservation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4318 , http://hdl.handle.net/10962/d1004976
- Description: In the leather industry fungicides are often used for the protection of wet-blue leather. These fungicides are usually only sparingly soluble and are therefore formulated together with surfactants in order to increase their solubility and to ensure an even distribution over the surface of the hide after treatment. Solutions containing both fungicides and surfactant are complex. The nature of these solutions was investigated. By means of UV/Vis spectroscopy and viscometry it was shown that the surfactant and fungicides form micelles and mixed micelles in solution. The nature of these micelles and mixed micelles was dependent on the solution temperature as well as on the concentrations of the surfactant and fungicides. At the higher temperatures and concentrations transition to large, possibly rod-shaped, mixed micelles occurred. The interaction between the selected fungicides 2-(thiocyanomethylthio)benzothiazole and n-octyl-4-isothiazol-3-one with bovine skin collagen in the form of both limed and lightly chromed hide powder in the presence of the non ionic surfactant Triton X -100 was investigated. Fungicide uptake was determined by difference measurements on the float solutions at regular intervals during treatment. Binding was rapid with equilibrium being established within the first six hours even for the solutions with the highest surfactant concentration. Binding failed to follow a normal mass-action binding-type isotherm approaching a saturation limit, but increased continuously indicating a co-operative effect whereby binding site affinity actually increased with the amount of ligand bound. Binding was accompanied by a drop in the free surfactant in the solution at the higher biocide levels indicating the formation of complex mixed micelles which bind to the collagen fibres. The uptake and antifungal activity of commercial fomulations of the fungicides on chrome-tanned wet-blue leather was investigated at various treatment temperatures. At lower fungicide treatment concentrations, binding tended to follow a typical mass-action type binding isotherm, increasing slightly with temperature. At higher float concentrations, an inflexion point was apparent beyond which uptake showed a marked increase with concentration. This inflexion point, signifying a change in binding characteristics, occurred at progressively lower concentrations with increasing temperature. Antifungal activity in terms of storage periods to onset of fungal growth was determined on the wet-blue leather cuttings immediately after treatment and drainage and also on sample discs after exhaustive extraction of free fungicide using dichloromethane. Storage performance testing of the various treated wet-blue leathers was carried out by different methods. Residual protective periods showed a curvilinear increase with dosage offer and surface uptake. In the low dosage range treatment temperature had only a relatively slight effect in promoting uptake and improving storage protection. At higher dosages, the influence of temperature on uptake and storage protection was greater due to the increase in surface binding of the fungicides at the elevated temperatures. Only a portion of the fungicide uptake was recovered by direct solvent extraction of the treated wet-blue leather. Solvent extraction reduced storage margins. The storage response in relation to fungicide content was, however comparable after extraction, indicating that both irreversibly bound and physically associated fungicide offered effective protection. Results of the study provide further insight into the mode of interaction of fungicide emulsion dispersion with bovine skin collagen, and the importance of the emulsion dispersions and its stability in determining the uptake of fungicide.
- Full Text:
- Date Issued: 1992
Intermediate shop steward training manual
- CWIU
- Authors: CWIU
- Date: Apr 1992
- Subjects: CWIU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/135509 , vital:37272
- Description: Dismissal is managements main weapon against workers. The union strives for JOB SECURITY for all workers; companies try to create INSECURITY amongst workers. Fighting against dismissals is therefore one of the biggest jobs a shop steward faces. A shop steward must be able to handle individual dismissal cases, without having to call in the organiser. In the old days, foremen / managers could fire workers for any small reason, and get away with it. Since 1973 workers have rebuilt unions to fight for their rights. One of the rights workers have fought for is the right to challenge dismissals. Workers have fought for this right in the factories and in the Industrial Court. Through such struggles, progress has been made, and certain rules have developed about what is " fair " and what is " unfair Management and the government are always trying to find ways to make dismissals easier. For instance the Labour Relations Act was changed in 1988. In the new Act, it was made easier for management to dismiss workers. However, the Unions fought and struggled to take out these changes to the Act. On May 1 1991 the Labour Relations Act was once again changed - this time more in favour of workers. Now, dismissals have to follow certain strict rules.
- Full Text:
- Date Issued: Apr 1992
- Authors: CWIU
- Date: Apr 1992
- Subjects: CWIU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/135509 , vital:37272
- Description: Dismissal is managements main weapon against workers. The union strives for JOB SECURITY for all workers; companies try to create INSECURITY amongst workers. Fighting against dismissals is therefore one of the biggest jobs a shop steward faces. A shop steward must be able to handle individual dismissal cases, without having to call in the organiser. In the old days, foremen / managers could fire workers for any small reason, and get away with it. Since 1973 workers have rebuilt unions to fight for their rights. One of the rights workers have fought for is the right to challenge dismissals. Workers have fought for this right in the factories and in the Industrial Court. Through such struggles, progress has been made, and certain rules have developed about what is " fair " and what is " unfair Management and the government are always trying to find ways to make dismissals easier. For instance the Labour Relations Act was changed in 1988. In the new Act, it was made easier for management to dismiss workers. However, the Unions fought and struggled to take out these changes to the Act. On May 1 1991 the Labour Relations Act was once again changed - this time more in favour of workers. Now, dismissals have to follow certain strict rules.
- Full Text:
- Date Issued: Apr 1992
International Woman of the Year Award
- Date: 1992 , 2022-10-06
- Subjects: Bam, Brigalia , Bam, Brigalia -- Awards
- Language: English
- Type: award , realia
- Identifier: http://hdl.handle.net/10948/56925 , vital:57204
- Description: Dr. Brigalia Bam received the International Woman of the Year award from the International Biographical Centre of Cambridge, England 1991-1992. She received the award for recognition of her services to women’s struggle for recognition. , Donated/gifted to Nelson Mandela University Archives , Forms part of: Brigalia Bam collection
- Full Text: false
- Date Issued: 1992
- Date: 1992 , 2022-10-06
- Subjects: Bam, Brigalia , Bam, Brigalia -- Awards
- Language: English
- Type: award , realia
- Identifier: http://hdl.handle.net/10948/56925 , vital:57204
- Description: Dr. Brigalia Bam received the International Woman of the Year award from the International Biographical Centre of Cambridge, England 1991-1992. She received the award for recognition of her services to women’s struggle for recognition. , Donated/gifted to Nelson Mandela University Archives , Forms part of: Brigalia Bam collection
- Full Text: false
- Date Issued: 1992
Intersolid pyrotechnic reactions of silicon
- Authors: Rugunanan, Rajan Anil
- Date: 1992
- Subjects: Thermochemistry , Thermal analysis , Chemistry, Analytic , Chemistry, Organic , Silicon
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4527 , http://hdl.handle.net/10962/d1015571
- Description: A study of the role of different oxidants with silicon as the fuel in simple binary pyrotechnic compositions is reported. Several oxidants were examined, but only three (Sb₂0₃, Fe₂0₃ and Sn0₂) satisfied the restrictions that the combustion temperatures should be below the melting point of platinum/rhodium thermocouples (1760°C), that burning rates should not exceed the response of the thermocouples, and that burning should occur without significant mass-transport. A fourth oxidant, KN0₃, was selected on account of its low melting point and general importance as a pyrotechnic oxidant. The oxidation of silicon in the presence of either Sb₂0₃ or KN0₃ could be identified from thermal analysis curves. No thermal events were noted when Si/Sn0₂ and SiFe₂0₃ compositions were heated under similar conditions. The oxidation of Si powder in oxygen was also studied. All four binary systems sustained burning over a reasonably wide range of compositions. The range of burning rates measured (2 to 35 mm s⁻¹) depended on the oxidant used. Fe₂0₃ and Sb₂0₃ gave slow burning mixtures compared to Sn0₂ and to KN0₃ compositions with a high Si content. Burning rates generally increased with increasing specific surface area of silicon, but decreased in the presence of inert diluents and moisture. The burning rates of the Si/Fe₂0₃ and Si/Sn0₂ systems increased with increasing compaction of the samples. Kinetic parameters derived from the temperature proftles recorded during combustion were generally low (6 to 37 kJ mol⁻¹). This is in keeping with proposals that burning is diffusion controlled. The values of kinetic parameters derived from thermal analysis curves were considerably greater ( > 250 kJ mol⁻¹). Two other fuels, FeSi₇ and CaSi₂, gave similar thermal analysis curves when used instead of silicon. There were considerable differences in the burning rates for binary mixtures of these fuels compared to silicon. Ternary systems with two fuels or two oxidants showed that only limited interaction occurs during thermal analysis. The use of a second fuel or oxidant did, however, modify the burning behaviour considerably. Other techniques used in this study to probe the details of the reaction processes included bomb calorimetry, measurement of thermal conductivities, infrared spectroscopy, X-ray diffraction and scanning electron micoscropy.
- Full Text:
- Date Issued: 1992
- Authors: Rugunanan, Rajan Anil
- Date: 1992
- Subjects: Thermochemistry , Thermal analysis , Chemistry, Analytic , Chemistry, Organic , Silicon
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4527 , http://hdl.handle.net/10962/d1015571
- Description: A study of the role of different oxidants with silicon as the fuel in simple binary pyrotechnic compositions is reported. Several oxidants were examined, but only three (Sb₂0₃, Fe₂0₃ and Sn0₂) satisfied the restrictions that the combustion temperatures should be below the melting point of platinum/rhodium thermocouples (1760°C), that burning rates should not exceed the response of the thermocouples, and that burning should occur without significant mass-transport. A fourth oxidant, KN0₃, was selected on account of its low melting point and general importance as a pyrotechnic oxidant. The oxidation of silicon in the presence of either Sb₂0₃ or KN0₃ could be identified from thermal analysis curves. No thermal events were noted when Si/Sn0₂ and SiFe₂0₃ compositions were heated under similar conditions. The oxidation of Si powder in oxygen was also studied. All four binary systems sustained burning over a reasonably wide range of compositions. The range of burning rates measured (2 to 35 mm s⁻¹) depended on the oxidant used. Fe₂0₃ and Sb₂0₃ gave slow burning mixtures compared to Sn0₂ and to KN0₃ compositions with a high Si content. Burning rates generally increased with increasing specific surface area of silicon, but decreased in the presence of inert diluents and moisture. The burning rates of the Si/Fe₂0₃ and Si/Sn0₂ systems increased with increasing compaction of the samples. Kinetic parameters derived from the temperature proftles recorded during combustion were generally low (6 to 37 kJ mol⁻¹). This is in keeping with proposals that burning is diffusion controlled. The values of kinetic parameters derived from thermal analysis curves were considerably greater ( > 250 kJ mol⁻¹). Two other fuels, FeSi₇ and CaSi₂, gave similar thermal analysis curves when used instead of silicon. There were considerable differences in the burning rates for binary mixtures of these fuels compared to silicon. Ternary systems with two fuels or two oxidants showed that only limited interaction occurs during thermal analysis. The use of a second fuel or oxidant did, however, modify the burning behaviour considerably. Other techniques used in this study to probe the details of the reaction processes included bomb calorimetry, measurement of thermal conductivities, infrared spectroscopy, X-ray diffraction and scanning electron micoscropy.
- Full Text:
- Date Issued: 1992
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream
- Cooper, J, Crafford, J E, Hecht, Thomas
- Authors: Cooper, J , Crafford, J E , Hecht, Thomas
- Date: 1992
- Subjects: Anadromous fishes -- Marion Island
- Language: English
- Type: Article
- Identifier: vital:6767 , http://hdl.handle.net/10962/d1008044
- Description: Brown trout were introduced to the Van den Boogaard River on subantarctic Marion Island in 1964, and a small population became established. The last individual was seen in 1984, and the species is now considered to be extinct on the island. Their diet was exclusively allochthonous, with snails and spiders predominating. Ages estimated at six to eleven years showed that spawning must have occurred since the original introduction. Since the Van den Boogaard River enters the sea via a waterfall, it is postulated that trout were not able to practice an anadromous life-style, and that this, as well as other factors connected with the impoverished nature of the stream, led to dwarfing of the resident population. No further introductions of alien fish to Marion Island should be contemplated.
- Full Text:
- Date Issued: 1992
- Authors: Cooper, J , Crafford, J E , Hecht, Thomas
- Date: 1992
- Subjects: Anadromous fishes -- Marion Island
- Language: English
- Type: Article
- Identifier: vital:6767 , http://hdl.handle.net/10962/d1008044
- Description: Brown trout were introduced to the Van den Boogaard River on subantarctic Marion Island in 1964, and a small population became established. The last individual was seen in 1984, and the species is now considered to be extinct on the island. Their diet was exclusively allochthonous, with snails and spiders predominating. Ages estimated at six to eleven years showed that spawning must have occurred since the original introduction. Since the Van den Boogaard River enters the sea via a waterfall, it is postulated that trout were not able to practice an anadromous life-style, and that this, as well as other factors connected with the impoverished nature of the stream, led to dwarfing of the resident population. No further introductions of alien fish to Marion Island should be contemplated.
- Full Text:
- Date Issued: 1992
Kuhauzela
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96527 , vital:31290 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-04
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96527 , vital:31290 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-04
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Local responses to political policies and socio-economic change in the Keiskammahoek district, Ciskei: anthropological perspectives
- De Wet, Christopher J, Manona, Cecil W, Palmer, Robin C G
- Authors: De Wet, Christopher J , Manona, Cecil W , Palmer, Robin C G
- Date: 1992
- Subjects: Burnshill -- Economic conditions Burnshill -- Social conditions Gymnothorax -- Economic conditions Gymnothorax -- Social conditions Land tenure -- South Africa -- Ciskei Keiskammahoek (South Africa) -- Economic conditions Keiskammahoek (South Africa) -- Social conditions
- Language: English
- Type: book , text
- Identifier: http://hdl.handle.net/10962/1810 , vital:20229 , ISBN 086810230x
- Description: This report relates to research done in the Keiskammahoek district of the Ciskei (see Map No. l) during 1989 and early 1990, with the financial support of the Programme for Development Research (PRODDER) of the Human Sciences Research Council (HSRC) of South Africa. The project was designed and conducted against the background of previous research, and has served as a pilot project for a larger project, entitled "Socio- Economic Change and Development Planning in the Keiskammahoek District of the Ciskei". This larger project which is currently in progress, (and which has been funded by the Institute for Research Development of the HSRC, by the Chairman's Fund of Anglo-American and De Beers, and by Johannesburg Consolidated Investments Co Ltd), is intended to give rise to a process of consultation and planning, leading to various local-level development initiatives in the District. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1992
- Authors: De Wet, Christopher J , Manona, Cecil W , Palmer, Robin C G
- Date: 1992
- Subjects: Burnshill -- Economic conditions Burnshill -- Social conditions Gymnothorax -- Economic conditions Gymnothorax -- Social conditions Land tenure -- South Africa -- Ciskei Keiskammahoek (South Africa) -- Economic conditions Keiskammahoek (South Africa) -- Social conditions
- Language: English
- Type: book , text
- Identifier: http://hdl.handle.net/10962/1810 , vital:20229 , ISBN 086810230x
- Description: This report relates to research done in the Keiskammahoek district of the Ciskei (see Map No. l) during 1989 and early 1990, with the financial support of the Programme for Development Research (PRODDER) of the Human Sciences Research Council (HSRC) of South Africa. The project was designed and conducted against the background of previous research, and has served as a pilot project for a larger project, entitled "Socio- Economic Change and Development Planning in the Keiskammahoek District of the Ciskei". This larger project which is currently in progress, (and which has been funded by the Institute for Research Development of the HSRC, by the Chairman's Fund of Anglo-American and De Beers, and by Johannesburg Consolidated Investments Co Ltd), is intended to give rise to a process of consultation and planning, leading to various local-level development initiatives in the District. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1992
Mabandla
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96531 , vital:31291 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-05
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96531 , vital:31291 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-05
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Making pupils think: the development of a microcomputer-inspired adaptation of the Standard 7 mathematics curriculum
- Authors: Norman, Maxie
- Date: 1992
- Subjects: Mathematics -- Study and teaching (Secondary) -- Data processing Computer-assisted instruction
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1667 , http://hdl.handle.net/10962/d1003550
- Description: This half-thesis gives an overview of the influence of the microcomputer on the way in which mathematics is done, taught and learnt. The nature of mathematics and the nature of the tutor, tool and tutee modes of microcomputer usage are discussed as background. A case is made for the use of action research methods and a classroom-based curriculum development model to facilitate innovation and the integration of the microcomputer into the mathematics classroom. A curriculum development cycle of situation analysis. planning, trial and evaluation is advocated. This approach is used to develop a microcomputer-based course aimed at enhancing the reasoning skills of standard 7 pupils. Pupils, working in groups of three, interact with the PROLOG system to build up databases of facts and rules. The microcomputer is used in tutee mode. In "teaching" this tutee, pupils discover the need for formal language and logical reasoning. Active learning is promoted by pupils' interaction with the PROLOG system and by discussions within groups. In this environment the teacher becomes a consultant and constructive critic rather than a lecturer. Findings suggest that the microcomputer plays an important role in terms of pupil motivation and that the microcomputer-based course enables pupils to experience formal language usage and logical reasoning·as relevant activities. Pupil databases provide evidence of the pupils' ability to make appropriate use of rules and to distinguish between and-conditions and or-conditions. The objective of making pupils think was largely achieved. It is recommended that the course be incorporated in the standard 1 or standard 8 curriculum to complement or replace parts of the Euclidean geometry sections as a vehicle for developing logical reasoning skills. Suggestions for the further use of the microcomputer as an investigative tool in mathematics classes and for further microcomputer-inspired courses are also made. The provision of appropriate training to enable teachers to make effective and innovative use of the microcomputer in mathematics lessons is advocated.
- Full Text:
- Date Issued: 1992
- Authors: Norman, Maxie
- Date: 1992
- Subjects: Mathematics -- Study and teaching (Secondary) -- Data processing Computer-assisted instruction
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1667 , http://hdl.handle.net/10962/d1003550
- Description: This half-thesis gives an overview of the influence of the microcomputer on the way in which mathematics is done, taught and learnt. The nature of mathematics and the nature of the tutor, tool and tutee modes of microcomputer usage are discussed as background. A case is made for the use of action research methods and a classroom-based curriculum development model to facilitate innovation and the integration of the microcomputer into the mathematics classroom. A curriculum development cycle of situation analysis. planning, trial and evaluation is advocated. This approach is used to develop a microcomputer-based course aimed at enhancing the reasoning skills of standard 7 pupils. Pupils, working in groups of three, interact with the PROLOG system to build up databases of facts and rules. The microcomputer is used in tutee mode. In "teaching" this tutee, pupils discover the need for formal language and logical reasoning. Active learning is promoted by pupils' interaction with the PROLOG system and by discussions within groups. In this environment the teacher becomes a consultant and constructive critic rather than a lecturer. Findings suggest that the microcomputer plays an important role in terms of pupil motivation and that the microcomputer-based course enables pupils to experience formal language usage and logical reasoning·as relevant activities. Pupil databases provide evidence of the pupils' ability to make appropriate use of rules and to distinguish between and-conditions and or-conditions. The objective of making pupils think was largely achieved. It is recommended that the course be incorporated in the standard 1 or standard 8 curriculum to complement or replace parts of the Euclidean geometry sections as a vehicle for developing logical reasoning skills. Suggestions for the further use of the microcomputer as an investigative tool in mathematics classes and for further microcomputer-inspired courses are also made. The provision of appropriate training to enable teachers to make effective and innovative use of the microcomputer in mathematics lessons is advocated.
- Full Text:
- Date Issued: 1992
Managing historical primary and secondary sources : a study of the efficacy of a teaching handbook prepared for first-year Vista University students
- Authors: Watson, Kelvin Innes
- Date: 1992
- Subjects: History -- Study and teaching (Secondary) -- South Africa History -- Study and teaching (Higher) -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1670 , http://hdl.handle.net/10962/d1003553
- Description: This study examines the teaching of primary and secondary sources in history at secondary and tertiary level. The various methods used to teach these aspects of the nature of history are compared to the Vista University teaching model. To establish the effectiveness of the vista Block A module for HIS100 students, two test instruments were devised to assess their skills in handling primary and secondary sources. Their skills in identifying relevant points from a passage of historical prose were also tested. A number of statistical techniques were applied to the data from the test instruments. This data was analysed in qualitative and quantitative terms. The results of this analysis suggested that students would probably benefit from a skills-orientated approach to studying history. On the basis of this study, it is recommended that the existing Vista teaching model be revised or amended so that a more effective method of teaching students about the nature of historical sources can be introduced.
- Full Text:
- Date Issued: 1992
- Authors: Watson, Kelvin Innes
- Date: 1992
- Subjects: History -- Study and teaching (Secondary) -- South Africa History -- Study and teaching (Higher) -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1670 , http://hdl.handle.net/10962/d1003553
- Description: This study examines the teaching of primary and secondary sources in history at secondary and tertiary level. The various methods used to teach these aspects of the nature of history are compared to the Vista University teaching model. To establish the effectiveness of the vista Block A module for HIS100 students, two test instruments were devised to assess their skills in handling primary and secondary sources. Their skills in identifying relevant points from a passage of historical prose were also tested. A number of statistical techniques were applied to the data from the test instruments. This data was analysed in qualitative and quantitative terms. The results of this analysis suggested that students would probably benefit from a skills-orientated approach to studying history. On the basis of this study, it is recommended that the existing Vista teaching model be revised or amended so that a more effective method of teaching students about the nature of historical sources can be introduced.
- Full Text:
- Date Issued: 1992
Mchuyo
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96466 , vital:31281 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-01
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96466 , vital:31281 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049b-01
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mgeniso
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96448 , vital:31278 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-07
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96448 , vital:31278 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-07
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mtsitso 1
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96402 , vital:31272 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-01
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96402 , vital:31272 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-01
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mtsitso 2
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96407 , vital:31273 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-02
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96407 , vital:31273 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-02
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mtsitso 3
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96421 , vital:31274 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-03
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96421 , vital:31274 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-03
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mtsitso 4
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96426 , vital:31275 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-04
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96426 , vital:31275 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-04
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
Mtsitso 5
- Venancio Mbande and his Chopi timbila xylophone group, Tracey, Andrew T N
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96439 , vital:31276 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-05
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992
- Authors: Venancio Mbande and his Chopi timbila xylophone group , Tracey, Andrew T N
- Date: 1992
- Subjects: Chopi (African people) -- South Africa , Folk music , Xylophone music , Rattle (Musical instrument) , Drum (Musical instrument) , Africa South Africa Rustenburg f-sa
- Language: Chopi
- Type: sound recordings , field recordings , Sound recording material
- Identifier: http://hdl.handle.net/10962/96439 , vital:31276 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC049a-05
- Description: Traditional dance song accompanied by timbila xylophone rattles and one drum
- Full Text: false
- Date Issued: 1992