A comparative normative survey of the isokinetic neck strength of senior elite South African rugby players and schoolboy rugby forwards
- Authors: Olivier, Pierre Emile
- Date: 2003
- Subjects: Rugby football -- South Africa -- Physiological aspects , Neck -- Muscles , Muscle strength , Rugby football players -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11026 , http://hdl.handle.net/10948/308 , Rugby football -- South Africa -- Physiological aspects , Neck -- Muscles , Muscle strength , Rugby football players -- South Africa
- Description: The aim of this study was to generate useful isokinetic normative data for various cervical musculature strength, range of motion and ratio variables based on different positional categories in a sample of senior elite South African rugby players. Normative data was generated for the following variables: peak torque, power generated at 0.2 of a second, active and passive range of motion, the ratio of peak torque flexion to peak torque extension (PTF/PTE), the ratio of peak torque lateral flexion left to peak torque lateral flexion right (PTL/PTR), the ratios of peak torque to body weight (PT/BW) and the ratios of peak torque to lean body mass (PT/LBM). Furthermore, the data gathered from the senior elite players was compared to similar data obtained from a sample of schoolboy rugby forwards to detect statistically significant differences (p < .05). A normative survey design was used in which 189 subjects from eight provincial unions participated in a one off evaluation session. The evaluation session comprised of various anthropometrical measurements and an isokinetic cervical musculature assessment. The normative data, displayed in Stanine tables, was generated for four positional categories: the front row (# 1-3), the second row (# 4-5), the back row (# 6-8) and the backline (# 9 -15). The second row positional category performed the best on the peak flexion torque variable (44.04 Nm). The front row positional category achieved the largest average peak extension torque (65.6 Nm). The second row positional category achieved the largest average peak lateral flexion right torque (69.42 Nm). A similar result was observed with the measurement of peak lateral flexion left torque, with the second row positional category achieving the largest average peak lateral flexion left torque (66.31 Nm). The backline positional category achieved the lowest averages on all the abovementioned peak torque variables. The front row positional category performed the best on the flexion power generated at 0.2 of a second variable (160.92 W). The front row positional category again achieved the largest extension power generated at 0.2 of a second average (237.02 W). The second row positional category achieved the largest lateral flexion right power generated at 0.2 of a second average (269.81 W). Similar results were observed with the measurement of lateral flexion left power generated at 0.2 of a second. The second row positional category achieved the largest lateral flexion left power generated at 0.2 of a second average (259.62 W). Again the backline players achieved the smallest power generated at 0.2 of a second averages for all the above-mentioned power variables. The measurement of passive (PROMFE) and active (AROMFE) range of motion for flexion to extension revealed that the second row had the largest average PROMFE (125.44°). The measurement of AROMFE revealed a similar result. The second row again had the largest average AROMFE (108.45°). The measurement of passive (PROMLF) and active (PROMFE) range of motion for lateral flexion left to right revealed smaller and different results to those found for PROMFE and AROMFE. For the variable of PROMLF the backline players had the largest average PROMLF (119.44°). Conversely, the second row had the largest average AROMLF (106.96°). The calculation of the various ratios revealed great variation between the positional categories. This can be attributed to the functional requirements the players have to adhere to, to be successful in their position. Various other statistical calculations were performed to draw the average force distance graphs for the positional categories for the peak torque variables. Furthermore the force distance graphs were assessed to determine the players’ ability to maintain 80% of peak torque. All the senior elite positional categories proved to be significantly (p < .05) older and heavier than the schoolboy forwards. The senior elite forward positional categories were also significantly (p < .05) taller than the schoolboy forward. There however proved to be no significant difference (p > .05) in stature between the backline and schoolboy forwards. All the positional categories proved to have significantly thicker (p < .05) necks, but significantly shorter (p < .05) cervical spines than the schoolboy forwards. The forward positional categories demonstrated to be significantly stronger (p < .05), on all peak torque measures, than the schoolboy forwards. The same was observed between the backline and schoolboy forwards, however no statistically significant difference (p > .05) was observed between the respective sample groups for the measure of peak lateral flexion left torque. For all the measures of power generated at 0.2 of a second, the senior forward positional categories proved to be significantly more powerful (p < .05) than the schoolboy forwards. The senior backline, although significantly more powerful (p < .05) in the flexion movement pattern, proved to be significantly less powerful (p < .05) than the schoolboy forwards in the lateral flexion right movement pattern. No statistically significant differences (p < .05) were found to exist between the senior backline and schoolboy forwards for the extension and lateral flexion left power generated at 0.2 of a second variables. All positional categories proved to have significantly smaller (p < .05) active and passive ranges of motion compared to the schoolboy forwards. Conversely, the senior elite players had significantly larger (p < .05) ratios (PTF/PTE, PTL/PTR, PT/BW and PT/LBM) than the schoolboy forwards. Literature has identified schoolboy rugby as having a much higher incidence of cervical spinal injuries than senior rugby. It can thus be inferred from the above information that the variables of peak torque and power generated at 0.2 of a second play a important role in safeguarding a player from injury on the field of play. Furthermore, calculated ratios show that senior players, especially the forwards, have undergone adaptive changes in cervical musculature strength to meet the requirements of the position they play in, thereby safeguarding themselves from cervical spinal injury. Proper cervical musculature conditioning has been cited in the literature as being an effective but neglected method of preventing cervical spinal injuries. The generation of normative data, concerning cervical musculature performance, can thus be used to prevent the occurrence of cervical injuries and re-injury of the cervical spine by providing a standard of musculature strength for safe participation in rugby, and possibly other collision type sports, and a quantified guide for successful patient rehabilitation respectively.
- Full Text:
- Date Issued: 2003
- Authors: Olivier, Pierre Emile
- Date: 2003
- Subjects: Rugby football -- South Africa -- Physiological aspects , Neck -- Muscles , Muscle strength , Rugby football players -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11026 , http://hdl.handle.net/10948/308 , Rugby football -- South Africa -- Physiological aspects , Neck -- Muscles , Muscle strength , Rugby football players -- South Africa
- Description: The aim of this study was to generate useful isokinetic normative data for various cervical musculature strength, range of motion and ratio variables based on different positional categories in a sample of senior elite South African rugby players. Normative data was generated for the following variables: peak torque, power generated at 0.2 of a second, active and passive range of motion, the ratio of peak torque flexion to peak torque extension (PTF/PTE), the ratio of peak torque lateral flexion left to peak torque lateral flexion right (PTL/PTR), the ratios of peak torque to body weight (PT/BW) and the ratios of peak torque to lean body mass (PT/LBM). Furthermore, the data gathered from the senior elite players was compared to similar data obtained from a sample of schoolboy rugby forwards to detect statistically significant differences (p < .05). A normative survey design was used in which 189 subjects from eight provincial unions participated in a one off evaluation session. The evaluation session comprised of various anthropometrical measurements and an isokinetic cervical musculature assessment. The normative data, displayed in Stanine tables, was generated for four positional categories: the front row (# 1-3), the second row (# 4-5), the back row (# 6-8) and the backline (# 9 -15). The second row positional category performed the best on the peak flexion torque variable (44.04 Nm). The front row positional category achieved the largest average peak extension torque (65.6 Nm). The second row positional category achieved the largest average peak lateral flexion right torque (69.42 Nm). A similar result was observed with the measurement of peak lateral flexion left torque, with the second row positional category achieving the largest average peak lateral flexion left torque (66.31 Nm). The backline positional category achieved the lowest averages on all the abovementioned peak torque variables. The front row positional category performed the best on the flexion power generated at 0.2 of a second variable (160.92 W). The front row positional category again achieved the largest extension power generated at 0.2 of a second average (237.02 W). The second row positional category achieved the largest lateral flexion right power generated at 0.2 of a second average (269.81 W). Similar results were observed with the measurement of lateral flexion left power generated at 0.2 of a second. The second row positional category achieved the largest lateral flexion left power generated at 0.2 of a second average (259.62 W). Again the backline players achieved the smallest power generated at 0.2 of a second averages for all the above-mentioned power variables. The measurement of passive (PROMFE) and active (AROMFE) range of motion for flexion to extension revealed that the second row had the largest average PROMFE (125.44°). The measurement of AROMFE revealed a similar result. The second row again had the largest average AROMFE (108.45°). The measurement of passive (PROMLF) and active (PROMFE) range of motion for lateral flexion left to right revealed smaller and different results to those found for PROMFE and AROMFE. For the variable of PROMLF the backline players had the largest average PROMLF (119.44°). Conversely, the second row had the largest average AROMLF (106.96°). The calculation of the various ratios revealed great variation between the positional categories. This can be attributed to the functional requirements the players have to adhere to, to be successful in their position. Various other statistical calculations were performed to draw the average force distance graphs for the positional categories for the peak torque variables. Furthermore the force distance graphs were assessed to determine the players’ ability to maintain 80% of peak torque. All the senior elite positional categories proved to be significantly (p < .05) older and heavier than the schoolboy forwards. The senior elite forward positional categories were also significantly (p < .05) taller than the schoolboy forward. There however proved to be no significant difference (p > .05) in stature between the backline and schoolboy forwards. All the positional categories proved to have significantly thicker (p < .05) necks, but significantly shorter (p < .05) cervical spines than the schoolboy forwards. The forward positional categories demonstrated to be significantly stronger (p < .05), on all peak torque measures, than the schoolboy forwards. The same was observed between the backline and schoolboy forwards, however no statistically significant difference (p > .05) was observed between the respective sample groups for the measure of peak lateral flexion left torque. For all the measures of power generated at 0.2 of a second, the senior forward positional categories proved to be significantly more powerful (p < .05) than the schoolboy forwards. The senior backline, although significantly more powerful (p < .05) in the flexion movement pattern, proved to be significantly less powerful (p < .05) than the schoolboy forwards in the lateral flexion right movement pattern. No statistically significant differences (p < .05) were found to exist between the senior backline and schoolboy forwards for the extension and lateral flexion left power generated at 0.2 of a second variables. All positional categories proved to have significantly smaller (p < .05) active and passive ranges of motion compared to the schoolboy forwards. Conversely, the senior elite players had significantly larger (p < .05) ratios (PTF/PTE, PTL/PTR, PT/BW and PT/LBM) than the schoolboy forwards. Literature has identified schoolboy rugby as having a much higher incidence of cervical spinal injuries than senior rugby. It can thus be inferred from the above information that the variables of peak torque and power generated at 0.2 of a second play a important role in safeguarding a player from injury on the field of play. Furthermore, calculated ratios show that senior players, especially the forwards, have undergone adaptive changes in cervical musculature strength to meet the requirements of the position they play in, thereby safeguarding themselves from cervical spinal injury. Proper cervical musculature conditioning has been cited in the literature as being an effective but neglected method of preventing cervical spinal injuries. The generation of normative data, concerning cervical musculature performance, can thus be used to prevent the occurrence of cervical injuries and re-injury of the cervical spine by providing a standard of musculature strength for safe participation in rugby, and possibly other collision type sports, and a quantified guide for successful patient rehabilitation respectively.
- Full Text:
- Date Issued: 2003
A study of the structural geology of the Witteberg Group and lowermost Karoo Supergroup, Darlington Dam, Jansenville District, Eastern Cape
- Goossens, Angelique Emily Maria
- Authors: Goossens, Angelique Emily Maria
- Date: 2003
- Subjects: Folds (Geology) -- South Africa -- Eastern Cape , Faults (Geology) -- South Africa -- Eastern Cape , Geology, Structural -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11071 , http://hdl.handle.net/10948/291 , Folds (Geology) -- South Africa -- Eastern Cape , Faults (Geology) -- South Africa -- Eastern Cape , Geology, Structural -- South Africa -- Eastern Cape
- Description: A number of outcrops of the Witteberg Group and lowermost Karoo Supergroup rocks were studied in the area south of the Darlington Dam, Jansenville District, with the aim of documenting structural characteristics of the area. All lithologies are folded with fold styles varying from gentle to near isoclinal (based on interlimb angle). Fold axes are either sub-horizontal or plunging at gentle to moderate angles whereas axial planes dip gently to vertically (predominantly steep to sub-vertical). Folds verge predominantly towards the north but where southward verging they are associated with faulting or strongly folded areas. Folds plunge gently to the east-southeast and west-northwest. The area consists of a large anticlinorium with both first and second order folds occurring. Eastwest striking faults occur in the study area and are classified as normal, reverse and thrust faults. A study of the joint sets shows that there are four dominant joint directions, namely 18o, 33o, 97o and 107o (in order from least to most important). An interpretation of the tectonic history is presented in which the relationships between faults and folds show that faults formed during and after folding. Folding, and reverse and thrust faulting, occurred during the compressional events that formed the Cape Fold Belt, whereas the normal faults formed during the relaxation of these compressional forces or during the break-up of Gondwana.
- Full Text:
- Date Issued: 2003
- Authors: Goossens, Angelique Emily Maria
- Date: 2003
- Subjects: Folds (Geology) -- South Africa -- Eastern Cape , Faults (Geology) -- South Africa -- Eastern Cape , Geology, Structural -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11071 , http://hdl.handle.net/10948/291 , Folds (Geology) -- South Africa -- Eastern Cape , Faults (Geology) -- South Africa -- Eastern Cape , Geology, Structural -- South Africa -- Eastern Cape
- Description: A number of outcrops of the Witteberg Group and lowermost Karoo Supergroup rocks were studied in the area south of the Darlington Dam, Jansenville District, with the aim of documenting structural characteristics of the area. All lithologies are folded with fold styles varying from gentle to near isoclinal (based on interlimb angle). Fold axes are either sub-horizontal or plunging at gentle to moderate angles whereas axial planes dip gently to vertically (predominantly steep to sub-vertical). Folds verge predominantly towards the north but where southward verging they are associated with faulting or strongly folded areas. Folds plunge gently to the east-southeast and west-northwest. The area consists of a large anticlinorium with both first and second order folds occurring. Eastwest striking faults occur in the study area and are classified as normal, reverse and thrust faults. A study of the joint sets shows that there are four dominant joint directions, namely 18o, 33o, 97o and 107o (in order from least to most important). An interpretation of the tectonic history is presented in which the relationships between faults and folds show that faults formed during and after folding. Folding, and reverse and thrust faulting, occurred during the compressional events that formed the Cape Fold Belt, whereas the normal faults formed during the relaxation of these compressional forces or during the break-up of Gondwana.
- Full Text:
- Date Issued: 2003
An assessment of bait availability, utilization and management guidelines in Eastern Cape estuaries
- Authors: Jooste, Jakobus Gerrit
- Date: 2003
- Subjects: Upogebia african -- Effects of sediments on -- South Africa -- Eastern Cape , Estuarine ecology -- South Africa -- Eastern Cape , Fishing baits -- Conservation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11073 , http://hdl.handle.net/10948/334 , Upogebia african -- Effects of sediments on -- South Africa -- Eastern Cape , Estuarine ecology -- South Africa -- Eastern Cape , Fishing baits -- Conservation -- South Africa -- Eastern Cape
- Description: Aspects around the management of benthic soft sediment bait organisms, with special focus on the mud prawn (Upogebia africana) of eastern Cape estuaries was investigated. The recreational linefishery of the Gamtoos estuary was described, and compared to previous studies. Target fish species was identified, and a large dependency on bait sourced from estuaries needed for the capture of these species was noted, especially for spotted grunter (Pomadasys commersonnii). A comparison between bait use, success and the natural diet of target fish species was also made. The structure and distribution of sediments in the old channel mud banks was described and compared with historical data. The influence of sediments on mud prawn distribution was investigated, but no significant interactions were found at the study site. The impacts of once-off pumping and digging events, and monthly trampling on the sediments and mud prawn population was studied over a 7-month period. Initial removal rates as well as recovery time varied significantly between the two collection methods, while the largest decline in prawn numbers (to zero) with no recovery visible after seven months was caused by trampling. All disturbances caused some alteration in sediment composition, but not to such an extent that the sediments became unfavorable for mud prawns. Trampling did, however, result in the compaction of sediments to such a degree that prawns could not construct burrows. Issues around current removal quotas of bait species as well as the creation of a small-scale commercial (SSC) bait selling operation at Swartkops estuary were critically evaluated, and suggestions for the future removal rates of mud prawns based on production export calculations were made. The distribution, size, sex ratios and number of gravid females occurring along a tidal gradient as well as along horizontal gradient of the mud bank during growth (January – March) and reproductive (September – October) periods was investigated. Changes in the distribution of females between the two study periods were significant, while the distribution of reproductively active females were closely linked to the low water mark (Lower tidal levels). Females occurring in this zone were also significantly larger than females occurring towards the back of the study site. Some minor changes along the horizontal gradient were also observed. The sediment compos ition of the mud bank was found not to play a role in this distribution, leading to the suggestion that exposure to ebb and flood tide currents could influence female prawn distributions. Management recommendations based on these observations were made.
- Full Text:
- Date Issued: 2003
- Authors: Jooste, Jakobus Gerrit
- Date: 2003
- Subjects: Upogebia african -- Effects of sediments on -- South Africa -- Eastern Cape , Estuarine ecology -- South Africa -- Eastern Cape , Fishing baits -- Conservation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11073 , http://hdl.handle.net/10948/334 , Upogebia african -- Effects of sediments on -- South Africa -- Eastern Cape , Estuarine ecology -- South Africa -- Eastern Cape , Fishing baits -- Conservation -- South Africa -- Eastern Cape
- Description: Aspects around the management of benthic soft sediment bait organisms, with special focus on the mud prawn (Upogebia africana) of eastern Cape estuaries was investigated. The recreational linefishery of the Gamtoos estuary was described, and compared to previous studies. Target fish species was identified, and a large dependency on bait sourced from estuaries needed for the capture of these species was noted, especially for spotted grunter (Pomadasys commersonnii). A comparison between bait use, success and the natural diet of target fish species was also made. The structure and distribution of sediments in the old channel mud banks was described and compared with historical data. The influence of sediments on mud prawn distribution was investigated, but no significant interactions were found at the study site. The impacts of once-off pumping and digging events, and monthly trampling on the sediments and mud prawn population was studied over a 7-month period. Initial removal rates as well as recovery time varied significantly between the two collection methods, while the largest decline in prawn numbers (to zero) with no recovery visible after seven months was caused by trampling. All disturbances caused some alteration in sediment composition, but not to such an extent that the sediments became unfavorable for mud prawns. Trampling did, however, result in the compaction of sediments to such a degree that prawns could not construct burrows. Issues around current removal quotas of bait species as well as the creation of a small-scale commercial (SSC) bait selling operation at Swartkops estuary were critically evaluated, and suggestions for the future removal rates of mud prawns based on production export calculations were made. The distribution, size, sex ratios and number of gravid females occurring along a tidal gradient as well as along horizontal gradient of the mud bank during growth (January – March) and reproductive (September – October) periods was investigated. Changes in the distribution of females between the two study periods were significant, while the distribution of reproductively active females were closely linked to the low water mark (Lower tidal levels). Females occurring in this zone were also significantly larger than females occurring towards the back of the study site. Some minor changes along the horizontal gradient were also observed. The sediment compos ition of the mud bank was found not to play a role in this distribution, leading to the suggestion that exposure to ebb and flood tide currents could influence female prawn distributions. Management recommendations based on these observations were made.
- Full Text:
- Date Issued: 2003
An assessment of selected non-water benefits of the Working for Water Programme in the Eastern and Southern Cape
- Authors: Du Plessis, Lily Lozelle
- Date: 2003
- Subjects: Water resources development -- South Africa -- Eastern Cape -- Cost effectiveness , Water resources development -- South Africa -- Southern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Eastern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Southern Cape -- Cost effectiveness , Land use -- Economic aspects -- South Africa -- Eastern Cape , Land use -- Economic aspects -- South Africa -- Southern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10991 , http://hdl.handle.net/10948/340 , Water resources development -- South Africa -- Eastern Cape -- Cost effectiveness , Water resources development -- South Africa -- Southern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Eastern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Southern Cape -- Cost effectiveness , Land use -- Economic aspects -- South Africa -- Eastern Cape , Land use -- Economic aspects -- South Africa -- Southern Cape
- Description: 1.1 Background to, and motivation for, the study: The Working for Water programme (WfW) is a public works programme designed to clear South Africa of water-consuming invasive alien tree and plants, and to replace them with low water consuming indigenous species. This would prevent a loss of more than 4000 million cubic metres water per annum from the hydrological cycle (DWAF, 1998). The economic viability of the programme has been established in the Western Cape and Kwazulu-Natal (van Wilgen, Little, Chapman, Görgens, Willems and Marais, 1997; Gilham and Haynes, 2001), but questioned in the Eastern and Southern Cape (Hosking, du Preez, Campbell, Wooldridge and du Plessis, 2002). Hosking et al. (2002) investigated the economic case for the programme by performing a Cost Benefit Analysis (CBA), based on increased water yield and livestock potential, on six selected sites in the Eastern and Southern Cape, viz. Albany, Kat River, Pot River, Tsitsikamma, Kouga and Port Elizabeth Driftsands.
- Full Text:
- Date Issued: 2003
- Authors: Du Plessis, Lily Lozelle
- Date: 2003
- Subjects: Water resources development -- South Africa -- Eastern Cape -- Cost effectiveness , Water resources development -- South Africa -- Southern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Eastern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Southern Cape -- Cost effectiveness , Land use -- Economic aspects -- South Africa -- Eastern Cape , Land use -- Economic aspects -- South Africa -- Southern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10991 , http://hdl.handle.net/10948/340 , Water resources development -- South Africa -- Eastern Cape -- Cost effectiveness , Water resources development -- South Africa -- Southern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Eastern Cape -- Cost effectiveness , Water conservation projects -- South Africa -- Southern Cape -- Cost effectiveness , Land use -- Economic aspects -- South Africa -- Eastern Cape , Land use -- Economic aspects -- South Africa -- Southern Cape
- Description: 1.1 Background to, and motivation for, the study: The Working for Water programme (WfW) is a public works programme designed to clear South Africa of water-consuming invasive alien tree and plants, and to replace them with low water consuming indigenous species. This would prevent a loss of more than 4000 million cubic metres water per annum from the hydrological cycle (DWAF, 1998). The economic viability of the programme has been established in the Western Cape and Kwazulu-Natal (van Wilgen, Little, Chapman, Görgens, Willems and Marais, 1997; Gilham and Haynes, 2001), but questioned in the Eastern and Southern Cape (Hosking, du Preez, Campbell, Wooldridge and du Plessis, 2002). Hosking et al. (2002) investigated the economic case for the programme by performing a Cost Benefit Analysis (CBA), based on increased water yield and livestock potential, on six selected sites in the Eastern and Southern Cape, viz. Albany, Kat River, Pot River, Tsitsikamma, Kouga and Port Elizabeth Driftsands.
- Full Text:
- Date Issued: 2003
An evaluation of the Xenopus laevis liver slice model to study the toxic effects of microcystin
- Authors: Coates, Nadya
- Date: 2003
- Subjects: Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11069 , http://hdl.handle.net/10948/307 , Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Description: Blooms of cyanobacteria have increased in occurrence in the past three decades and have been reported to cause severe problems for animals and humans, leading to death in extreme instances. The majority of poisonings that have taken place have been attributed to a hepatotoxin produced by the species Microcystis aeruginosa, namely microcystin. The appearance of a cyanobacterial bloom does not give any indication as to its toxicity and therefore, it is imperative that simple, yet sensitive, bioassays are developed to overcome this problem. This study was undertaken to evaluate the effects of microcystin-LR on the liver of Xenopus laevis both in vitro and in vivo. This animal provides an opportunity to study the long-term hepatotoxic effects of the toxin compared to in vitro studies performed with mice and rats. The use of the liver slice model system as a potential bioassay to study the effects of microcystin-LR on Xenopus laevis liver was evaluated. Liver slices were cultured in RPMI- 1640 culture medium for periods ranging from 30 hours to 10 days and the liver slices were exposed to toxin concentrations ranging from 1nM to 500nM. The use of frog liver slices to study the longer-term effects of low-dose exposure to microcystin-LR was evaluated by observing the ultrastructural changes within hepatocytes using transmission electron microscopy, the release of the enzymes alanine aminotransferase and lactate dehydrogenase into the surrounding culture medium, as well as using a 3-[4,5-dimethylthiazol-2yl]-2,5- diphenyl tetrazolium bromide assay to determine the viability of the liver slices in culture. The amount of lipid peroxidation in the liver slices after exposure to microcystin-LR was assessed using the Thiobarbituric Acid Test. Results showed the frog liver slice culture system to be an inadequate method to evaluate the hepatotoxic effects of microcystin-LR. An in vivo assessment of the effects of microcystin-LR on Xenopus laevis was carried out using a total of 9 frogs (3 groups of 3 frogs). Frogs received a single intraperitoneal dose of 120mg/kg of microcystin-LR and were sacrificed at 8 and 24 hours post exposure. Microcystin-LR caused no significant change in serum lactate dehydrogenase levels, hepatosomatic index (liver weight as a percentage body weight), glutathione peroxidase activity, glycogen or lipid peroxidation. There was, however, an increase in glutathione sii transferase activity in the liver. The presence of the toxin in the liver was confirmed by immunohistochemistry. This study suggests that Xenopus laevis has, in some way, adapted to detoxifying aquatic toxins in the environment.
- Full Text:
- Date Issued: 2003
- Authors: Coates, Nadya
- Date: 2003
- Subjects: Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11069 , http://hdl.handle.net/10948/307 , Zenopus laevis , Microcystis aeruginosa -- Toxicology
- Description: Blooms of cyanobacteria have increased in occurrence in the past three decades and have been reported to cause severe problems for animals and humans, leading to death in extreme instances. The majority of poisonings that have taken place have been attributed to a hepatotoxin produced by the species Microcystis aeruginosa, namely microcystin. The appearance of a cyanobacterial bloom does not give any indication as to its toxicity and therefore, it is imperative that simple, yet sensitive, bioassays are developed to overcome this problem. This study was undertaken to evaluate the effects of microcystin-LR on the liver of Xenopus laevis both in vitro and in vivo. This animal provides an opportunity to study the long-term hepatotoxic effects of the toxin compared to in vitro studies performed with mice and rats. The use of the liver slice model system as a potential bioassay to study the effects of microcystin-LR on Xenopus laevis liver was evaluated. Liver slices were cultured in RPMI- 1640 culture medium for periods ranging from 30 hours to 10 days and the liver slices were exposed to toxin concentrations ranging from 1nM to 500nM. The use of frog liver slices to study the longer-term effects of low-dose exposure to microcystin-LR was evaluated by observing the ultrastructural changes within hepatocytes using transmission electron microscopy, the release of the enzymes alanine aminotransferase and lactate dehydrogenase into the surrounding culture medium, as well as using a 3-[4,5-dimethylthiazol-2yl]-2,5- diphenyl tetrazolium bromide assay to determine the viability of the liver slices in culture. The amount of lipid peroxidation in the liver slices after exposure to microcystin-LR was assessed using the Thiobarbituric Acid Test. Results showed the frog liver slice culture system to be an inadequate method to evaluate the hepatotoxic effects of microcystin-LR. An in vivo assessment of the effects of microcystin-LR on Xenopus laevis was carried out using a total of 9 frogs (3 groups of 3 frogs). Frogs received a single intraperitoneal dose of 120mg/kg of microcystin-LR and were sacrificed at 8 and 24 hours post exposure. Microcystin-LR caused no significant change in serum lactate dehydrogenase levels, hepatosomatic index (liver weight as a percentage body weight), glutathione peroxidase activity, glycogen or lipid peroxidation. There was, however, an increase in glutathione sii transferase activity in the liver. The presence of the toxin in the liver was confirmed by immunohistochemistry. This study suggests that Xenopus laevis has, in some way, adapted to detoxifying aquatic toxins in the environment.
- Full Text:
- Date Issued: 2003
An exploration into the reasons for the resignation of ex-employees from the University of Port Elizabeth against international indicators in employee retention
- Authors: Anderson, Amber Cristal
- Date: 2003
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11000 , http://hdl.handle.net/10948/289
- Description: South African organisations have not been left untouched by the impact of globalisation on their business practices. In a bid to maintain and improve on their competitive advantage, they have had to embark on initiatives to secure a place in the global economy. Entwined herein is the challenge to embrace a whole new definition of equality and develop their human capital as described in various legislative interventions of the South African Government. This study reflects the outcomes of an exploratory study into the reasons for the resignation of ex-employees from the University of Port Elizabeth, against international indicators in employee retention. The research was based on the premise that an effective and efficient transformation strategy should originate from a tangible understanding of all the socio-behavioural and influencing aspects of employee retention. The results suggest the development of an employee-retention strategy which could facilitate the realisation of the Employment Equity Plan. The objectives of the study were: to provide critical insight into why employees are resigning from the University of Port Elizabeth (UPE), to determine the social and developmental expectations of ex-UPE employees while in a transforming organisation, to identify and analyse ex-employees’ perceptions of the implementation of UPE’s Employment Equity Plan, to analyse ex-employees’ perceptions of existing retention practices at UPE, to provide recommendations towards an employee-retention strategy for UPE. The study is exploratory and descriptive in nature, and is quantitatively analysed with limited qualitative inferences. The population consisted of ex-UPE employees who had left the service of the university, from 01 January 2000 to 31 October 2002, by resignation. The period coincided with the implementation phase of the UPE Employment Equity Plan. For the purpose of this study, N=69. Twenty-eight ex-employees were untraceable, therefore n=41. Thirty ex-employees took part in the survey, thus making the sample return 73%. Eight of the respondents were dispersed across three continents other than Africa. The survey instrument, administered as an e-mailed and mailed questionnaire, was selected as the most suitable quantitative research method, because respondents were globally dispersed. Content analysis was selected as the most appropriate technique to produce findings in the qualitative aspect of the research. Where appropriate, descriptive statistics (univariate and bivariate analyses) were applied to describe the variables, the results of which were exhibited as tabular or graphical displays. Inferential statistical analyses (Pearson Chi-square and M-L Chisquare tests) were also conducted.
- Full Text:
- Date Issued: 2003
- Authors: Anderson, Amber Cristal
- Date: 2003
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11000 , http://hdl.handle.net/10948/289
- Description: South African organisations have not been left untouched by the impact of globalisation on their business practices. In a bid to maintain and improve on their competitive advantage, they have had to embark on initiatives to secure a place in the global economy. Entwined herein is the challenge to embrace a whole new definition of equality and develop their human capital as described in various legislative interventions of the South African Government. This study reflects the outcomes of an exploratory study into the reasons for the resignation of ex-employees from the University of Port Elizabeth, against international indicators in employee retention. The research was based on the premise that an effective and efficient transformation strategy should originate from a tangible understanding of all the socio-behavioural and influencing aspects of employee retention. The results suggest the development of an employee-retention strategy which could facilitate the realisation of the Employment Equity Plan. The objectives of the study were: to provide critical insight into why employees are resigning from the University of Port Elizabeth (UPE), to determine the social and developmental expectations of ex-UPE employees while in a transforming organisation, to identify and analyse ex-employees’ perceptions of the implementation of UPE’s Employment Equity Plan, to analyse ex-employees’ perceptions of existing retention practices at UPE, to provide recommendations towards an employee-retention strategy for UPE. The study is exploratory and descriptive in nature, and is quantitatively analysed with limited qualitative inferences. The population consisted of ex-UPE employees who had left the service of the university, from 01 January 2000 to 31 October 2002, by resignation. The period coincided with the implementation phase of the UPE Employment Equity Plan. For the purpose of this study, N=69. Twenty-eight ex-employees were untraceable, therefore n=41. Thirty ex-employees took part in the survey, thus making the sample return 73%. Eight of the respondents were dispersed across three continents other than Africa. The survey instrument, administered as an e-mailed and mailed questionnaire, was selected as the most suitable quantitative research method, because respondents were globally dispersed. Content analysis was selected as the most appropriate technique to produce findings in the qualitative aspect of the research. Where appropriate, descriptive statistics (univariate and bivariate analyses) were applied to describe the variables, the results of which were exhibited as tabular or graphical displays. Inferential statistical analyses (Pearson Chi-square and M-L Chisquare tests) were also conducted.
- Full Text:
- Date Issued: 2003
An exploration of adolescent risk-taking behaviour : a case study analysis
- Authors: Dietrich, Valerie
- Date: 2003
- Subjects: Teenagers -- South Africa -- Conduct of life , Risk-taking (psychology) in adolescence
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10989 , http://hdl.handle.net/10948/312 , Teenagers -- South Africa -- Conduct of life , Risk-taking (psychology) in adolescence
- Description: Do adolescents of colour really engage in risk-taking behaviours as often generalised by the public? Are they in fact the alcohol, drugs, sex, and violence generation? This study attempts to investigate the conditions influencing the choices adolescents make prior to their engaging in risk-taking behaviours. In the social sciences, concerns over adolescents’ recklessly irresponsible behaviours have deep roots. In 1904 G. Stanley Hall depicted adolescence as misbehaving because of the storms and stresses of the transition from childhood to adulthood. Subsequently, social scientists produced substantial evidence that the storminess of adolescence is largely an over generalisation, which has not been empirically substantiated. In corroboration of this interpretation, this study also indicates that not all adolescents engage in risk-taking behaviour, and those risky individuals do not necessarily engage in all spheres of risk-taking. The majority of the target group only experimented with certain risk behaviours by engaging in them on one occasion only. The specific high school was selected because the researcher knew the learners, as she was an educator there at the time. She was thus reasonably aware of the frequency, the nature and the severity of the risk-taking behaviours of the target group. In general, the most important findings of the study signified a moderate level of participation in risk-taking activities. However, in certain spheres such as cigarette smoking, alcohol usage and sexual intercourse, an extreme participation level was reported. Certain factors such as gender, age, socio-economic conditions, parental (one or both) absence, and the respondents’ attitude towards the specific behaviour, were discovered to have played an influential role in the target group taking risks. Based on the reasons advanced for engaging in risk-taking behaviour, the researcher concluded that the following theories were applicable in explaining the behaviour of the respondents. These theories are the social learning theory, symbolic interactionist theory, social identity, the theory of reasoned action, and Maslow’s hierarchy of needs. The researcher trusts that this study will assist the reader to understand the complex contributing circumstances that the target group has to contend with in making decisions.
- Full Text:
- Date Issued: 2003
- Authors: Dietrich, Valerie
- Date: 2003
- Subjects: Teenagers -- South Africa -- Conduct of life , Risk-taking (psychology) in adolescence
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10989 , http://hdl.handle.net/10948/312 , Teenagers -- South Africa -- Conduct of life , Risk-taking (psychology) in adolescence
- Description: Do adolescents of colour really engage in risk-taking behaviours as often generalised by the public? Are they in fact the alcohol, drugs, sex, and violence generation? This study attempts to investigate the conditions influencing the choices adolescents make prior to their engaging in risk-taking behaviours. In the social sciences, concerns over adolescents’ recklessly irresponsible behaviours have deep roots. In 1904 G. Stanley Hall depicted adolescence as misbehaving because of the storms and stresses of the transition from childhood to adulthood. Subsequently, social scientists produced substantial evidence that the storminess of adolescence is largely an over generalisation, which has not been empirically substantiated. In corroboration of this interpretation, this study also indicates that not all adolescents engage in risk-taking behaviour, and those risky individuals do not necessarily engage in all spheres of risk-taking. The majority of the target group only experimented with certain risk behaviours by engaging in them on one occasion only. The specific high school was selected because the researcher knew the learners, as she was an educator there at the time. She was thus reasonably aware of the frequency, the nature and the severity of the risk-taking behaviours of the target group. In general, the most important findings of the study signified a moderate level of participation in risk-taking activities. However, in certain spheres such as cigarette smoking, alcohol usage and sexual intercourse, an extreme participation level was reported. Certain factors such as gender, age, socio-economic conditions, parental (one or both) absence, and the respondents’ attitude towards the specific behaviour, were discovered to have played an influential role in the target group taking risks. Based on the reasons advanced for engaging in risk-taking behaviour, the researcher concluded that the following theories were applicable in explaining the behaviour of the respondents. These theories are the social learning theory, symbolic interactionist theory, social identity, the theory of reasoned action, and Maslow’s hierarchy of needs. The researcher trusts that this study will assist the reader to understand the complex contributing circumstances that the target group has to contend with in making decisions.
- Full Text:
- Date Issued: 2003
An investigation into the induction of oxidative stress and apoptosis by microcystin-LR in the CaCo2 cell line and intestinal tract of Balb/c mice
- Authors: Botha, Nicolette
- Date: 2003
- Subjects: Microcystis aeruginosa -- Toxicology , Apoptosis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11066 , http://hdl.handle.net/10948/349 , Microcystis aeruginosa -- Toxicology , Apoptosis
- Description: This study reports the findings on the effect of Microcystin-LR (MCLR) on the gastrointestinal tract cells of mice and on two different cell lines, Caco2 and MCF-7. The cyanobacterium Microcystis aeruginosa produces the potent toxin, MCLR. This toxin has been implicated in a number of cases of ill-health. It was decided to investigate whether microcystin-LR induced apoptosis in the gastrointestinal tract of mice and also which possible mechanisms were involved in the induction in vitro. Balb/c mice were given a 75% LD50 intraperitoneal dose of pure microcystin -LR and sacrificed at 8, 16, 24 and 32 hours post-exposure. The small intestinal sections were stained with haematoxylin and eosin and examined for apoptotic cells. There was a time-dependent increase in the number of apoptotic cells with most in the duodenum and the jejunum. No change in glycogen content was evident at 24 hours post exposure when PAS-stained sections were examined. To determine that microcystin was the agent responsible for the changes, fluoroscein isothiocyanate (FITC) immunostaining for the toxin was done on the sections. Apoptosis in vitro was investigated in Caco2, a cell line that behaves like normal enterocytes when the cells are differentiated at confluency, and MCF-7, a breast cancer cell line deficient in pro-caspase-3, cells by 3-[dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays and by staining with DAPI and Rhodamine 123. MCLR exposure induced apoptosis, as seen in decreased cell viability and increased leakage of LDH, as well as mitochondrial damage shown by Rhodamine staining. The MCF-7 cells, deficient in pro-caspase-3, and Caco2 cells did not show cleavage of poly(ADP)ribose polymerase (PARP) after exposure to 50μM MCLR after 72 hours exposure. Both micro- and milli-calpain activity was however significantly increased in both cell lines exposed to the toxin. There was a significant increase in H2O2, one of the key reactive oxygen species, production during the first 30 minutes that the cells were exposed to 50 mM MCLR.
- Full Text:
- Date Issued: 2003
- Authors: Botha, Nicolette
- Date: 2003
- Subjects: Microcystis aeruginosa -- Toxicology , Apoptosis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11066 , http://hdl.handle.net/10948/349 , Microcystis aeruginosa -- Toxicology , Apoptosis
- Description: This study reports the findings on the effect of Microcystin-LR (MCLR) on the gastrointestinal tract cells of mice and on two different cell lines, Caco2 and MCF-7. The cyanobacterium Microcystis aeruginosa produces the potent toxin, MCLR. This toxin has been implicated in a number of cases of ill-health. It was decided to investigate whether microcystin-LR induced apoptosis in the gastrointestinal tract of mice and also which possible mechanisms were involved in the induction in vitro. Balb/c mice were given a 75% LD50 intraperitoneal dose of pure microcystin -LR and sacrificed at 8, 16, 24 and 32 hours post-exposure. The small intestinal sections were stained with haematoxylin and eosin and examined for apoptotic cells. There was a time-dependent increase in the number of apoptotic cells with most in the duodenum and the jejunum. No change in glycogen content was evident at 24 hours post exposure when PAS-stained sections were examined. To determine that microcystin was the agent responsible for the changes, fluoroscein isothiocyanate (FITC) immunostaining for the toxin was done on the sections. Apoptosis in vitro was investigated in Caco2, a cell line that behaves like normal enterocytes when the cells are differentiated at confluency, and MCF-7, a breast cancer cell line deficient in pro-caspase-3, cells by 3-[dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays and by staining with DAPI and Rhodamine 123. MCLR exposure induced apoptosis, as seen in decreased cell viability and increased leakage of LDH, as well as mitochondrial damage shown by Rhodamine staining. The MCF-7 cells, deficient in pro-caspase-3, and Caco2 cells did not show cleavage of poly(ADP)ribose polymerase (PARP) after exposure to 50μM MCLR after 72 hours exposure. Both micro- and milli-calpain activity was however significantly increased in both cell lines exposed to the toxin. There was a significant increase in H2O2, one of the key reactive oxygen species, production during the first 30 minutes that the cells were exposed to 50 mM MCLR.
- Full Text:
- Date Issued: 2003
Aplousobranch ascidians (Tunicata: Ascidiacea) from Southern Africa
- Authors: Parker-Nance, Shirley
- Date: 2003
- Subjects: Sea squirts -- South Africa -- Classification , Aplousobranchia -- South Africa -- Classification
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:11078 , http://hdl.handle.net/10948/311 , Sea squirts -- South Africa -- Classification , Aplousobranchia -- South Africa -- Classification
- Description: The ascidian (subphylum Tunicata: class Ascidiacea) fauna along the southern African coast constitutes an important component of the sessile benthic reef fauna. Little is known of the species composition, biodiversity and distribution of ascidians on southern African intertidal and subtidal reefs. Past research on the ascidian fauna of South Africa was sporadic and limited, with only about one hundred and seventy species recorded during the last one hundred and twenty years. This is the first taxonomic study undertaken by a South African resident scientist. The study focused on six genera in four families (Euherdmaniidae, Polyclinidae, Pseudodistomidae and Didemnidae) belonging to the class Ascidiacea and suborder Aplousobranchia. Five species new to science, two Polyclinum, two Pseudodistoma and one Polysyncraton species are described. New additional information on the distribution of five species previously known to science, including one recorded for the first time along the South African coast, is presented. A literature review and comparison of the taxonomic important characteristics is made of all species known globally for the six genera. These six genera comprise twelve Euherdmania, fifteen Aplidiopsis, forty Polyclinum thirty-one Pseudodistoma, six Atriolum and sixty-eight Polysyncraton species.
- Full Text:
- Date Issued: 2003
- Authors: Parker-Nance, Shirley
- Date: 2003
- Subjects: Sea squirts -- South Africa -- Classification , Aplousobranchia -- South Africa -- Classification
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:11078 , http://hdl.handle.net/10948/311 , Sea squirts -- South Africa -- Classification , Aplousobranchia -- South Africa -- Classification
- Description: The ascidian (subphylum Tunicata: class Ascidiacea) fauna along the southern African coast constitutes an important component of the sessile benthic reef fauna. Little is known of the species composition, biodiversity and distribution of ascidians on southern African intertidal and subtidal reefs. Past research on the ascidian fauna of South Africa was sporadic and limited, with only about one hundred and seventy species recorded during the last one hundred and twenty years. This is the first taxonomic study undertaken by a South African resident scientist. The study focused on six genera in four families (Euherdmaniidae, Polyclinidae, Pseudodistomidae and Didemnidae) belonging to the class Ascidiacea and suborder Aplousobranchia. Five species new to science, two Polyclinum, two Pseudodistoma and one Polysyncraton species are described. New additional information on the distribution of five species previously known to science, including one recorded for the first time along the South African coast, is presented. A literature review and comparison of the taxonomic important characteristics is made of all species known globally for the six genera. These six genera comprise twelve Euherdmania, fifteen Aplidiopsis, forty Polyclinum thirty-one Pseudodistoma, six Atriolum and sixty-eight Polysyncraton species.
- Full Text:
- Date Issued: 2003
Apollo, Dionysus, dialectical reason and critical cinema
- Authors: Konik, Adrian
- Date: 2003
- Subjects: Motion pictures and language , Philosophy in motion pictures , Dionysus (Greek deity) in literature , Apollo (Greek deity) in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10990 , http://hdl.handle.net/10948/295 , Motion pictures and language , Philosophy in motion pictures , Dionysus (Greek deity) in literature , Apollo (Greek deity) in literature
- Description: The contemporary era is dominated by an Apollonian visual language, i.e. the visual language of mainstream cinema and the mass media, and this study concerns the role that critical cinema, as Dionysian subverter, plays under such conditions. I argue that critical cinema should not be viewed as something completely ‘new’ but rather as a new, or at least the latest, manifestation of an older subversive ‘Dionysian’ voice that has made its presence felt since the dawn of the hegemony of an Apollonian disposition in Homeric epic. (I maintain that the history of western culture can be understood in terms of the persistent tension between Apollonian and Dionysian dispositions, and I use the distinction Derrida makes in Différance, between restricted and general economies, to distinguish between them, respectively.) I begin by considering the Dionysian echoes within Homer’s Iliad and then consider the way in which they became a ‘roar’ in the tragedies of Aeschylus. After Aeschylus a predominantly Apollonian voice asserted itself once again (to various degrees) through the work of Sophocles and Euripides. This was in keeping with the trend towards a more (Apollonian) restricted economy that is reflected in the writings of Homer’s literary successors, and which reached a crucial stage in Plato’s valorisation of ‘dialectics’, or what I term ‘dialecticis m’, which saw the birth of ‘dialectical language’. Through Plato dialecticism, or dialectical language, became instantiated as the ‘language’ of western philosophy and this predisposed western culture to develop along predominantly Apollonian lines. This continued from Plato, through the Middle Ages, until in the 17th century this Apollonian trend became manifest in the concept of the stable, integral, autonomous and self -transparent Cartesian ego, which is inextricably linked to dialectical language that promises certainty of ‘truth’ and maintains the possibility of representing the world in its entirety (as a system). In the contemporary ‘age of a world picture’, the hegemonic (Apollonian) visual language of mainstream cinema and the mass media propagates and perpetuates the belief in the possibility of representing the world in its entirety through the image, and insofar as it caters to audiences’ needs for stability and certainty (of ‘truth’) through providing such ‘complete’ representations, shapes their subjectivity along the lines of the Cartesian ego. According to Baudrillard, in contemporary society and culture the hyperreal realm of visual language has become far more significant for individuals than their immediate, empirical experiences, and that, as a result, they are far less predisposed to discussion and reflection and far more prone to passive ‘watching’. Also, Adorno maintains that it is impossible to have a form of critical cinema because of the way in which features inherent to cinema predispose it towards being an ideological apparatus. However, if both Baudrillard and Adorno are correct then the future appears increasingly bleak as it involves nothing other than the continuation and propagation of the hegemony of the visual language of mainstream cinema and the mass media, with no possibility for critical resistance. I argue instead that critical cinema is possible because the move towards a more restricted economy, motivated by an Apollonian disposition, did not develop from Homer to the contemporary era without meeting Dionysian resistance. I trace the presence of a subversive Dionysian voice through Homer’s Iliad, through Aeschylus’ Prometheus Bound, and through Plato’s Dialogues, where it echoes in the sentiments of some of Plato’s interlocutors, such as Callicles. In addition, I maintain that a ‘Dionysian’ voice resonates through both Nietzsche’s and Heidegger’s respective criticisms of ‘dialectical language’ and the ‘validity’ of the Cartesian ego. I argue that critical cinema, particularly Aronofsky’s postmodern critical cinema, parallels their similar epistemological and ontological perspectives in the way in which it engages with the (Apollonian) visual language of mainstream cinema and the mass media, and thereby, potentially, facilitates a more porous and protean subjectivity.
- Full Text:
- Date Issued: 2003
- Authors: Konik, Adrian
- Date: 2003
- Subjects: Motion pictures and language , Philosophy in motion pictures , Dionysus (Greek deity) in literature , Apollo (Greek deity) in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10990 , http://hdl.handle.net/10948/295 , Motion pictures and language , Philosophy in motion pictures , Dionysus (Greek deity) in literature , Apollo (Greek deity) in literature
- Description: The contemporary era is dominated by an Apollonian visual language, i.e. the visual language of mainstream cinema and the mass media, and this study concerns the role that critical cinema, as Dionysian subverter, plays under such conditions. I argue that critical cinema should not be viewed as something completely ‘new’ but rather as a new, or at least the latest, manifestation of an older subversive ‘Dionysian’ voice that has made its presence felt since the dawn of the hegemony of an Apollonian disposition in Homeric epic. (I maintain that the history of western culture can be understood in terms of the persistent tension between Apollonian and Dionysian dispositions, and I use the distinction Derrida makes in Différance, between restricted and general economies, to distinguish between them, respectively.) I begin by considering the Dionysian echoes within Homer’s Iliad and then consider the way in which they became a ‘roar’ in the tragedies of Aeschylus. After Aeschylus a predominantly Apollonian voice asserted itself once again (to various degrees) through the work of Sophocles and Euripides. This was in keeping with the trend towards a more (Apollonian) restricted economy that is reflected in the writings of Homer’s literary successors, and which reached a crucial stage in Plato’s valorisation of ‘dialectics’, or what I term ‘dialecticis m’, which saw the birth of ‘dialectical language’. Through Plato dialecticism, or dialectical language, became instantiated as the ‘language’ of western philosophy and this predisposed western culture to develop along predominantly Apollonian lines. This continued from Plato, through the Middle Ages, until in the 17th century this Apollonian trend became manifest in the concept of the stable, integral, autonomous and self -transparent Cartesian ego, which is inextricably linked to dialectical language that promises certainty of ‘truth’ and maintains the possibility of representing the world in its entirety (as a system). In the contemporary ‘age of a world picture’, the hegemonic (Apollonian) visual language of mainstream cinema and the mass media propagates and perpetuates the belief in the possibility of representing the world in its entirety through the image, and insofar as it caters to audiences’ needs for stability and certainty (of ‘truth’) through providing such ‘complete’ representations, shapes their subjectivity along the lines of the Cartesian ego. According to Baudrillard, in contemporary society and culture the hyperreal realm of visual language has become far more significant for individuals than their immediate, empirical experiences, and that, as a result, they are far less predisposed to discussion and reflection and far more prone to passive ‘watching’. Also, Adorno maintains that it is impossible to have a form of critical cinema because of the way in which features inherent to cinema predispose it towards being an ideological apparatus. However, if both Baudrillard and Adorno are correct then the future appears increasingly bleak as it involves nothing other than the continuation and propagation of the hegemony of the visual language of mainstream cinema and the mass media, with no possibility for critical resistance. I argue instead that critical cinema is possible because the move towards a more restricted economy, motivated by an Apollonian disposition, did not develop from Homer to the contemporary era without meeting Dionysian resistance. I trace the presence of a subversive Dionysian voice through Homer’s Iliad, through Aeschylus’ Prometheus Bound, and through Plato’s Dialogues, where it echoes in the sentiments of some of Plato’s interlocutors, such as Callicles. In addition, I maintain that a ‘Dionysian’ voice resonates through both Nietzsche’s and Heidegger’s respective criticisms of ‘dialectical language’ and the ‘validity’ of the Cartesian ego. I argue that critical cinema, particularly Aronofsky’s postmodern critical cinema, parallels their similar epistemological and ontological perspectives in the way in which it engages with the (Apollonian) visual language of mainstream cinema and the mass media, and thereby, potentially, facilitates a more porous and protean subjectivity.
- Full Text:
- Date Issued: 2003
Constructive dismissal in labour law
- Van Loggerenberg, Johannes Jurgens
- Authors: Van Loggerenberg, Johannes Jurgens
- Date: 2003
- Subjects: Employees -- Dismissal of -- Law and legislation -- South Africa , Unfair labor practices -- South Africa , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11054 , http://hdl.handle.net/10948/301 , Employees -- Dismissal of -- Law and legislation -- South Africa , Unfair labor practices -- South Africa , Labor laws and legislation -- South Africa
- Description: The history of constructive dismissals in South Africa imitated from the English law in 1986, when an employee successfully challenged the employer on this particular concept after an incident relating a forced resignation. From the literature it is clear that constructive dismissal, as we know it today, originated from our English counterparts. Being a relatively new concept, the South African labour laws caught on at a rapid pace. The leading case on which the South African authors leaned towards was the English case of Woods v WM Car Services (Peterborough). In South Africa constructive dismissals were given statutory force in unfair dismissal law and is defined as the coerced or forced termination of a contract of employment resultant in from the conduct of the employer. There are many forms in which constructive dismissals would postulate that could justify an employee to lay claim to constructive dismissal. Examples thereof are the amendment of the contract of employment, rude language and sexual harassment. It is eminent that certain elements should be present before an employee would have reasonable prospects of succeeding with such a claim. Constructive dismissal comes into the equation when an employer behaves in such a manner that eventually and ultimately leads to the employee, being the receiving party, in the employment relationship, to terminate the employment contract. This termination must be the direct result of the conduct of the employer that irreparably frustrated the relationship and made it impossible for the employee to remain in the service of the employer in question. It appears that the courts have taken a firm stance on coerced or forced resignation, in its various forms tantamount to breach of contact, that any sufficiently unreasonable conduct by an employer may justify that the employee to terminate services and lay claim to the fact that he had been constructively dismissed. It needs to be mentioned that the fact that the mere fact that the employer acted in an unreasonable manner would not suffice and it is up to the employee to prove how the conduct of the employer justified the employee to leave and claim that the employer’s conduct resulted in a material or fundamental beach of the employment contract. In dealing with the contingency of the concept of constructive dismissals it has been expressly provided for in numerous systems of labour law. As is seen herein, a constructive dismissal consists in the termination of the employment contract by reason of the employee’s rather than the employer’s own immediate act. The act of the employee is precipitated by earlier conduct on the part of the employer, which conduct may or may not be justified. Various authors and academics endeavoured to defined constructive dismissal and all had the same or at least some of the elements present, to justify constructive dismissal. The most glaring element being the termination of employment as a result of the any conduct that is tantamount to a breach going to the root of the relationship by the employer, that frustrated the relationship between the employer and the employee and rendered it irreparable. The employee resigns or repudiates the employment contract as a result of the employer normally not leaving the employee any other option but to resign. This can also be termed as coerced or forced resignations and are commonly better known as “constructive dismissal”. The employee is deemed to have been dismissed, even though it is the employee who terminated the employment contract. The most important element to mention is the employee terminated the employment contract, ie resigned yet this is regarded as a dismissal, it is however for the employee to first lay a claim at the proper authority and the employee must prove his / her allegation before it can be a constructive dismissal. As will become clear, that the onus of proof is on the employee to show that the termination of employment resulted from the conduct of the employer. Equally true as in all cases of constructive dismissal, including cases of sexual harassment, being a ground for constructive dismissal, the employee must prove that to remain in service would have been unbearable and intolerable. Sexual harassment is one of the most difficult forms of constructive dismissals, in many cases there are no witnesses and the employee either “suffers in silence or opt to place her dignity at stake to prove her case. It seems as though the test is to determine if the employer’s conduct evinced a deliberate and oppressive intention to have the employment terminated and left the employee with only one option that of resignation to protect her interests. Employees have a right to seek statutory relief and needs to be protected. If a coerced or forced resignation had taken place irrespective whether the employee resigned or not. It is against this back drop that constructive dismissals was given legality and are now recognized as one of the four forms of dismissals in terms of the Act.
- Full Text:
- Date Issued: 2003
- Authors: Van Loggerenberg, Johannes Jurgens
- Date: 2003
- Subjects: Employees -- Dismissal of -- Law and legislation -- South Africa , Unfair labor practices -- South Africa , Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11054 , http://hdl.handle.net/10948/301 , Employees -- Dismissal of -- Law and legislation -- South Africa , Unfair labor practices -- South Africa , Labor laws and legislation -- South Africa
- Description: The history of constructive dismissals in South Africa imitated from the English law in 1986, when an employee successfully challenged the employer on this particular concept after an incident relating a forced resignation. From the literature it is clear that constructive dismissal, as we know it today, originated from our English counterparts. Being a relatively new concept, the South African labour laws caught on at a rapid pace. The leading case on which the South African authors leaned towards was the English case of Woods v WM Car Services (Peterborough). In South Africa constructive dismissals were given statutory force in unfair dismissal law and is defined as the coerced or forced termination of a contract of employment resultant in from the conduct of the employer. There are many forms in which constructive dismissals would postulate that could justify an employee to lay claim to constructive dismissal. Examples thereof are the amendment of the contract of employment, rude language and sexual harassment. It is eminent that certain elements should be present before an employee would have reasonable prospects of succeeding with such a claim. Constructive dismissal comes into the equation when an employer behaves in such a manner that eventually and ultimately leads to the employee, being the receiving party, in the employment relationship, to terminate the employment contract. This termination must be the direct result of the conduct of the employer that irreparably frustrated the relationship and made it impossible for the employee to remain in the service of the employer in question. It appears that the courts have taken a firm stance on coerced or forced resignation, in its various forms tantamount to breach of contact, that any sufficiently unreasonable conduct by an employer may justify that the employee to terminate services and lay claim to the fact that he had been constructively dismissed. It needs to be mentioned that the fact that the mere fact that the employer acted in an unreasonable manner would not suffice and it is up to the employee to prove how the conduct of the employer justified the employee to leave and claim that the employer’s conduct resulted in a material or fundamental beach of the employment contract. In dealing with the contingency of the concept of constructive dismissals it has been expressly provided for in numerous systems of labour law. As is seen herein, a constructive dismissal consists in the termination of the employment contract by reason of the employee’s rather than the employer’s own immediate act. The act of the employee is precipitated by earlier conduct on the part of the employer, which conduct may or may not be justified. Various authors and academics endeavoured to defined constructive dismissal and all had the same or at least some of the elements present, to justify constructive dismissal. The most glaring element being the termination of employment as a result of the any conduct that is tantamount to a breach going to the root of the relationship by the employer, that frustrated the relationship between the employer and the employee and rendered it irreparable. The employee resigns or repudiates the employment contract as a result of the employer normally not leaving the employee any other option but to resign. This can also be termed as coerced or forced resignations and are commonly better known as “constructive dismissal”. The employee is deemed to have been dismissed, even though it is the employee who terminated the employment contract. The most important element to mention is the employee terminated the employment contract, ie resigned yet this is regarded as a dismissal, it is however for the employee to first lay a claim at the proper authority and the employee must prove his / her allegation before it can be a constructive dismissal. As will become clear, that the onus of proof is on the employee to show that the termination of employment resulted from the conduct of the employer. Equally true as in all cases of constructive dismissal, including cases of sexual harassment, being a ground for constructive dismissal, the employee must prove that to remain in service would have been unbearable and intolerable. Sexual harassment is one of the most difficult forms of constructive dismissals, in many cases there are no witnesses and the employee either “suffers in silence or opt to place her dignity at stake to prove her case. It seems as though the test is to determine if the employer’s conduct evinced a deliberate and oppressive intention to have the employment terminated and left the employee with only one option that of resignation to protect her interests. Employees have a right to seek statutory relief and needs to be protected. If a coerced or forced resignation had taken place irrespective whether the employee resigned or not. It is against this back drop that constructive dismissals was given legality and are now recognized as one of the four forms of dismissals in terms of the Act.
- Full Text:
- Date Issued: 2003
Correlates and outcomes of emotional intelligence in organisations
- Authors: Bosman, Leon Abraham
- Date: 2003
- Subjects: Leadership , Emotional intelligence , Organizational behavior
- Language: English
- Type: Thesis , Doctoral , DCom
- Identifier: vital:11006 , http://hdl.handle.net/10948/337 , Leadership , Emotional intelligence , Organizational behavior
- Description: Emotional Intelligence and Leadership are two very important constructs to organizations. Likewise concepts like OCB, conflict handling and intention to quit of employees are equally important constructs to organizations. The primary aim of the present study was to determine how well Organisational Citizenship Behaviour and intention to quit as well as the conflict handling style of subordinates could be predicted by means of leadership style, and the emotional intelligence of leaders. A secondary aim was to determine whether a causal model could be built to represent the relationships among the variables included in the study. Relationships among these constructs were investigated in a South African sample of employees (N=470) working for various organisations. The construct validity and internal consistency of the measuring instruments were investigated. The finally accepted factor structure of not one of the measuring instruments matched the original structure as found by the authors/developers of the measuring instruments. It was therefore decided that in all cases the factor pattern as determined on the responses of the present sample would be used in further analyses of the data. Emotional intelligence of leaders as seen by subordinates and the self - perceived conflict handling styles of subordinates seem to be related in the case of Integrating and Obliging conflict handling styles and both the emotional intelligence sub-scales, i.e. Motivation and Vigilance. The Multiple Regression analysis indicated that the emotional intelligence sub-scales scores played a minor role in the prediction of Organizational Citizenship Behaviour. Models of the relationships among the variables were built by studying the results of v previous as well as the present study. The model, in which emotional intelligence is depicted as a causal variable influencing - through leadership behaviour – organizational citizenship behaviour and the integrating style of handling interpersonal conflict represented a good fit with the data. These results seem to provide some structure for thinking about the relationships among the variables and can possibly serve as frames of reference in future studies.
- Full Text:
- Date Issued: 2003
- Authors: Bosman, Leon Abraham
- Date: 2003
- Subjects: Leadership , Emotional intelligence , Organizational behavior
- Language: English
- Type: Thesis , Doctoral , DCom
- Identifier: vital:11006 , http://hdl.handle.net/10948/337 , Leadership , Emotional intelligence , Organizational behavior
- Description: Emotional Intelligence and Leadership are two very important constructs to organizations. Likewise concepts like OCB, conflict handling and intention to quit of employees are equally important constructs to organizations. The primary aim of the present study was to determine how well Organisational Citizenship Behaviour and intention to quit as well as the conflict handling style of subordinates could be predicted by means of leadership style, and the emotional intelligence of leaders. A secondary aim was to determine whether a causal model could be built to represent the relationships among the variables included in the study. Relationships among these constructs were investigated in a South African sample of employees (N=470) working for various organisations. The construct validity and internal consistency of the measuring instruments were investigated. The finally accepted factor structure of not one of the measuring instruments matched the original structure as found by the authors/developers of the measuring instruments. It was therefore decided that in all cases the factor pattern as determined on the responses of the present sample would be used in further analyses of the data. Emotional intelligence of leaders as seen by subordinates and the self - perceived conflict handling styles of subordinates seem to be related in the case of Integrating and Obliging conflict handling styles and both the emotional intelligence sub-scales, i.e. Motivation and Vigilance. The Multiple Regression analysis indicated that the emotional intelligence sub-scales scores played a minor role in the prediction of Organizational Citizenship Behaviour. Models of the relationships among the variables were built by studying the results of v previous as well as the present study. The model, in which emotional intelligence is depicted as a causal variable influencing - through leadership behaviour – organizational citizenship behaviour and the integrating style of handling interpersonal conflict represented a good fit with the data. These results seem to provide some structure for thinking about the relationships among the variables and can possibly serve as frames of reference in future studies.
- Full Text:
- Date Issued: 2003
Food choices of tactile defensive children
- Authors: Smith, Anna Magdalena
- Date: 2003
- Subjects: Children -- Nutrition -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11034 , http://hdl.handle.net/10948/d1020371
- Description: This research explores a different view of the picky or fussy eater. Although occupational therapists and speech therapists are aware that children with sensory defensiveness and specific tactile defensiveness have different eating habits, this has not been described before.
- Full Text:
- Date Issued: 2003
- Authors: Smith, Anna Magdalena
- Date: 2003
- Subjects: Children -- Nutrition -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11034 , http://hdl.handle.net/10948/d1020371
- Description: This research explores a different view of the picky or fussy eater. Although occupational therapists and speech therapists are aware that children with sensory defensiveness and specific tactile defensiveness have different eating habits, this has not been described before.
- Full Text:
- Date Issued: 2003
Grade six and seven learners' perceptions of the HIV/AIDS life skills education programme
- Authors: Julies, Zainuneesa
- Date: 2003
- Subjects: AIDS (Disease) -- Study and teaching (Primary) -- South Africa -- Evaluation , AIDS (Disease) -- South Africa -- Prevention
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10988 , http://hdl.handle.net/10948/315 , AIDS (Disease) -- Study and teaching (Primary) -- South Africa -- Evaluation , AIDS (Disease) -- South Africa -- Prevention
- Description: At present there is no cure or vaccine for Human Immuno-deficiency Virus (HIV) or Acquired Immune Deficiency Syndrome (AIDS) therefore prevention programmes are seen as the only means of reducing the spread of the disease. HIV/AIDS education programmes in schools have been identified as the most effective intervention because billions of children can be reached worldwide and because schools are the one social institution with which most children come into contact. Young people in particular have been identified as the age group most in need of a preventative programme. The aim of this study is to explore the perceptions of grade six and seven learners with regard to the Life Skills programme focusing on HIV/AIDS education in the Port Elizabeth region. In order to fulfill the above aim a qualitative study was undertaken within an exploratory descriptive approach. A non-probability, convenient sample of six schools were selected. Focus groups, utilising an unstructured interview, were used to gather qualitative data about the perceptions of grade six and seven learners. The focus groups consisted of 10-12 participants. The data was thematically analysed using Tesch’s approach. The major findings of the present study included the following: 1. Learners’ perceptions of completing the questionnaire were generally positive in nature. Negative perceptions related to practical issues such as the length of the questionnaire and the time of administration. 2. Learner’s perceptions of the programme were generally positive. 3. Learners’ felt more comfortable discussing HIV/AIDS with parents and teachers. xi 4. Learners’ appeared to be well informed about high-risk behaviour related to HIV/AIDS and existing myths. 5. Contact with HIV+ people is non-existent. However, learner’s felt that the programme had fostered positive attitudes towards HIV+ people. 6. Learner’s felt that schools had an important role to play in sharing information about HIV/AIDS. These findings seem to indicate positive outcomes for the programme as a whole, in that is was successful in terms of conveying information regarding HIV/AIDS; it led to positive changes in attitudes, especially towards HIV+ people; and it confirmed the school as the best setting for implementing HIV/AIDS Life Skills programmes.
- Full Text:
- Date Issued: 2003
- Authors: Julies, Zainuneesa
- Date: 2003
- Subjects: AIDS (Disease) -- Study and teaching (Primary) -- South Africa -- Evaluation , AIDS (Disease) -- South Africa -- Prevention
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10988 , http://hdl.handle.net/10948/315 , AIDS (Disease) -- Study and teaching (Primary) -- South Africa -- Evaluation , AIDS (Disease) -- South Africa -- Prevention
- Description: At present there is no cure or vaccine for Human Immuno-deficiency Virus (HIV) or Acquired Immune Deficiency Syndrome (AIDS) therefore prevention programmes are seen as the only means of reducing the spread of the disease. HIV/AIDS education programmes in schools have been identified as the most effective intervention because billions of children can be reached worldwide and because schools are the one social institution with which most children come into contact. Young people in particular have been identified as the age group most in need of a preventative programme. The aim of this study is to explore the perceptions of grade six and seven learners with regard to the Life Skills programme focusing on HIV/AIDS education in the Port Elizabeth region. In order to fulfill the above aim a qualitative study was undertaken within an exploratory descriptive approach. A non-probability, convenient sample of six schools were selected. Focus groups, utilising an unstructured interview, were used to gather qualitative data about the perceptions of grade six and seven learners. The focus groups consisted of 10-12 participants. The data was thematically analysed using Tesch’s approach. The major findings of the present study included the following: 1. Learners’ perceptions of completing the questionnaire were generally positive in nature. Negative perceptions related to practical issues such as the length of the questionnaire and the time of administration. 2. Learner’s perceptions of the programme were generally positive. 3. Learners’ felt more comfortable discussing HIV/AIDS with parents and teachers. xi 4. Learners’ appeared to be well informed about high-risk behaviour related to HIV/AIDS and existing myths. 5. Contact with HIV+ people is non-existent. However, learner’s felt that the programme had fostered positive attitudes towards HIV+ people. 6. Learner’s felt that schools had an important role to play in sharing information about HIV/AIDS. These findings seem to indicate positive outcomes for the programme as a whole, in that is was successful in terms of conveying information regarding HIV/AIDS; it led to positive changes in attitudes, especially towards HIV+ people; and it confirmed the school as the best setting for implementing HIV/AIDS Life Skills programmes.
- Full Text:
- Date Issued: 2003
Investigations into the asymmetric reduction of ketones
- Authors: Bena, Luvuyo Clifford
- Date: 2003
- Subjects: Ketones , Asymmetric synthesis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11065 , http://hdl.handle.net/10948/323 , Ketones , Asymmetric synthesis
- Description: A six-step synthesis of salbutamol from methyl salicylate with an overall yield of 17% has been completed, although the yield was not optimised. In the process, Zn(BH4)2 was found to selectively reduce a ketone carbonyl group in the presence of an ester unit. In contrast, borane was found to reduce both the ketone and ester carbonyl groups. Reduction of phenacyl bromide with borane in the presence of chiral catalysts based on (R)-alaninol and (R,S)-ephidrine resulted a measure of enantioselectivity in the product. However, the configuration of the alcohol obtained in the case of (R)-alaninol was contrary to expectations based both on experimental trends observed elsewhere as well as our own theoretical predictions. The asymmetric reduction of methyl 5-bromoacetyl-2-benzyloxybenzoate was accomplished with both borane and Zn(BH4)2 in the presence of a range of chiral catalysts. Optically active products were obtained in all cases, although the optical rotations were significantly smaller in the case of Zn(BH4)2. Unfortunately, we were not successful in determining the enantiomeric excesses of these reactions. The use of a NMR lanthanide shift reagent resulted in a complex spectrum that was impossible to interpret unambiguously. This presumably arises from the presence of several Lewis base sites in the product at which complexation with the shift reagent can take place. It was also not possible to determine the optical rotation of salbutamol itself owing to the relatively small amount of material obtained. A conformational analysis of salbutamol, where NMR data was correlated with molecular modelling results, was successfully carried out and revealed a strong preference for that conformer family characterised by O–C–C–N and Ar–C–C–N torsion angles of ca. 60º and 180º, respectively. Interestingly, these conformers are found to be stabilised by OH…N rather than NH…O hydrogen bonding. This study has also confirmed the effectiveness of the MMFF94 force field for conformational analysis studies in compounds of this kind. Lastly, a relatively simple method for modelling the BH3/oxazaborolidine reduction of ketones at the PM3 semiempirical MO level of approximation was devised. This approach has provided insights into the mechanism of the reaction and has furthermore enabled us to predict the enantioselectivities likely to result from various catalysts and ketones. In comparing our theoretical and experimental findings, an anomalous result was observed in the case of (R)-alaninol; this will have to be investigated further, particularly at the experimental level. However, we believe that our approach provides a sound basis for aiding the design and screening of new, potentially better catalysts.
- Full Text:
- Date Issued: 2003
- Authors: Bena, Luvuyo Clifford
- Date: 2003
- Subjects: Ketones , Asymmetric synthesis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11065 , http://hdl.handle.net/10948/323 , Ketones , Asymmetric synthesis
- Description: A six-step synthesis of salbutamol from methyl salicylate with an overall yield of 17% has been completed, although the yield was not optimised. In the process, Zn(BH4)2 was found to selectively reduce a ketone carbonyl group in the presence of an ester unit. In contrast, borane was found to reduce both the ketone and ester carbonyl groups. Reduction of phenacyl bromide with borane in the presence of chiral catalysts based on (R)-alaninol and (R,S)-ephidrine resulted a measure of enantioselectivity in the product. However, the configuration of the alcohol obtained in the case of (R)-alaninol was contrary to expectations based both on experimental trends observed elsewhere as well as our own theoretical predictions. The asymmetric reduction of methyl 5-bromoacetyl-2-benzyloxybenzoate was accomplished with both borane and Zn(BH4)2 in the presence of a range of chiral catalysts. Optically active products were obtained in all cases, although the optical rotations were significantly smaller in the case of Zn(BH4)2. Unfortunately, we were not successful in determining the enantiomeric excesses of these reactions. The use of a NMR lanthanide shift reagent resulted in a complex spectrum that was impossible to interpret unambiguously. This presumably arises from the presence of several Lewis base sites in the product at which complexation with the shift reagent can take place. It was also not possible to determine the optical rotation of salbutamol itself owing to the relatively small amount of material obtained. A conformational analysis of salbutamol, where NMR data was correlated with molecular modelling results, was successfully carried out and revealed a strong preference for that conformer family characterised by O–C–C–N and Ar–C–C–N torsion angles of ca. 60º and 180º, respectively. Interestingly, these conformers are found to be stabilised by OH…N rather than NH…O hydrogen bonding. This study has also confirmed the effectiveness of the MMFF94 force field for conformational analysis studies in compounds of this kind. Lastly, a relatively simple method for modelling the BH3/oxazaborolidine reduction of ketones at the PM3 semiempirical MO level of approximation was devised. This approach has provided insights into the mechanism of the reaction and has furthermore enabled us to predict the enantioselectivities likely to result from various catalysts and ketones. In comparing our theoretical and experimental findings, an anomalous result was observed in the case of (R)-alaninol; this will have to be investigated further, particularly at the experimental level. However, we believe that our approach provides a sound basis for aiding the design and screening of new, potentially better catalysts.
- Full Text:
- Date Issued: 2003
Jane Austen re-visited a feminist evaluation of the longevity and relevance of the Austen Oeuvre
- Authors: Kollmann, Elizabeth
- Date: 2003
- Subjects: Austen, Jane, 1775-1817 -- Criticism and interpretation , Feminist literary criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10994 , http://hdl.handle.net/10948/299 , Austen, Jane, 1775-1817 -- Criticism and interpretation , Feminist literary criticism
- Description: Although many might consider Jane Austen to be outdated and clichéd, her work retains an undying appeal. During the last decade the English-speaking world has experienced an Austen renaissance as it has been treated to a number of film and television adaptations of her work, including Pride and Prejudice, Emma, Mansfield Park and Sense and Sensibility. Film critics such as Bill De Lapp (1996) and Sherry Dean (1996) have commented on the phenomenal response these productions received and have been amazed by Austen’s ability to compete with current movie scripts. The reasons for viewers and readers enjoying and identifying with Austen’s fiction are numerous. Readers of varying persuasions have different agendas and hence different views and interpretations of Austen. This thesis follows a gynocritical approach and applies a feminist point of view when reading and discussing Austen. Austen’s novels - Pride and Prejudice, Mansfield Park, Emma, Northanger Abbey, Sense and Sensibility, and Persuasion – are re-read and reevaluated from a feminist perspective in order to call attention to Austen’s awareness of women’s second-class position in her society. Women’s experiences in Austen’s time are compared to women’s experiences in society today in order to illustrate, in some way, the tremendous progress the feminist movement has made. In addition, by examining what Austen reveals about the material reality of women in her time, it is possible to explore the legacy that modern women have inherited. Literary critics such as André Brink (1998), Claudia Johnson (1988), and Gilbert and Gubar (1979) believe Austen to create feminist awareness in her novels. There are critics, however, who do not view Austen as necessarily feminist in her writing. Nancy Armstrong writes in Desire and Domestic Fiction (1987) that Austen’s objective is not a critique of the Abstract iv old order but rather a redefinition of wealth and status. In Culture and Imperialism (1993) Edward Said implicates Austen in the rationale for imperial expansion, while Barbara Seeber argues in “The Schooling of Marianne Dashwood” (1999) that Austen’s texts should be understood as dialogic. Others, such as Patricia Beer (1974), believe Austen’s fiction primarily to be about marriage since all her novels end with matrimony. My own reading of Austen takes into consideration her social milieu and patriarchal inheritance. It argues that Austen writes within the framework of patriarchy (for example by marrying off her heroines) possibly because she is aware that in order to survive as a woman (writer) in a male-favouring world and in a publishing world dominated by men, her critique needs to be covert. If read from a feminist perspective, Austen’s fiction draws our attention to issues such as women’s (lack of) education, the effects of not being given access to knowledge, marriage as a patriarchal institution of entrapment, and women’s identity. Her fiction reveals the effects of educating women for a life of domesticity, and illustrates that such an education is biased, leaving women powerless and without any means of self-protection in a male-dominated world. Although contemporary women in the Western world mostly enjoy equal education opportunities to men, they suffer the consequences of a legacy which denied them access to a proper education. Feminist writers such as Flis Henwood (2000) show that contemporary women believe certain areas of expertise belong to men exclusively. Others such as Linda Nochlin (1994) reveal that because women did not have access to higher education for so many years, they failed to produce great women artists like Chaucer or Cézanne. Austen’s fiction also exposes the economic and social system (of which education constitutes a major part) for enforcing marriage and for enfeebling women. In addition, it illustrates some of the realities and pitfalls of marriage. While Austen only subtly refers to Abstract v women’s disempowerment within marriage, contemporary feminist scholars such as Germaine Greer (1999) and Arnot, Araújo, Deliyanni, and Ivinson (2000) explicitly warn women that marriage is a patriarchal institution of entrapment and that it often leaves women feeling unfulfilled. The issue of marriage as a patriarchal institution has been thought important and has been addressed by feminists because it contributes to women’s powerlessness. Feminist scholars today find it imperative to expose all forms of power in order to eradicate women’s subordination. bell hooks comments in Feminist Theory: From Margin to Center (2000) on the importance of revealing unfair power relations in order to eliminate oppression of any kind. Austen does not necessarily express the wish to eradicate forms of power or oppression in her novels. Yet, if we read her work from a feminist point of view, we are made aware of the social construction of power. From her fiction we can infer that male power is enshrined in the very structure of society, and this makes us aware of women’s lack of power in her time. Austen’s novels, however, are not merely novels of powerlessness but of empowerment. By creating rounded women characters and by giving them the power to judge, to refuse and to write, Austen challenges the stereotyped view of woman as either overpowering monster or weak and fragile angel. In addition, her novels seem to question women’s inherited identity and to suggest that qualities such as emotionality and mothering are not natural aspects of being a woman. Because she suggests ways in which women might empower themselves, albeit within patriarchal parameters, one could argue that she contributes, in a small way, to the transformation of existing power relations and to the eradication of women’s servile position in society.
- Full Text:
- Date Issued: 2003
- Authors: Kollmann, Elizabeth
- Date: 2003
- Subjects: Austen, Jane, 1775-1817 -- Criticism and interpretation , Feminist literary criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10994 , http://hdl.handle.net/10948/299 , Austen, Jane, 1775-1817 -- Criticism and interpretation , Feminist literary criticism
- Description: Although many might consider Jane Austen to be outdated and clichéd, her work retains an undying appeal. During the last decade the English-speaking world has experienced an Austen renaissance as it has been treated to a number of film and television adaptations of her work, including Pride and Prejudice, Emma, Mansfield Park and Sense and Sensibility. Film critics such as Bill De Lapp (1996) and Sherry Dean (1996) have commented on the phenomenal response these productions received and have been amazed by Austen’s ability to compete with current movie scripts. The reasons for viewers and readers enjoying and identifying with Austen’s fiction are numerous. Readers of varying persuasions have different agendas and hence different views and interpretations of Austen. This thesis follows a gynocritical approach and applies a feminist point of view when reading and discussing Austen. Austen’s novels - Pride and Prejudice, Mansfield Park, Emma, Northanger Abbey, Sense and Sensibility, and Persuasion – are re-read and reevaluated from a feminist perspective in order to call attention to Austen’s awareness of women’s second-class position in her society. Women’s experiences in Austen’s time are compared to women’s experiences in society today in order to illustrate, in some way, the tremendous progress the feminist movement has made. In addition, by examining what Austen reveals about the material reality of women in her time, it is possible to explore the legacy that modern women have inherited. Literary critics such as André Brink (1998), Claudia Johnson (1988), and Gilbert and Gubar (1979) believe Austen to create feminist awareness in her novels. There are critics, however, who do not view Austen as necessarily feminist in her writing. Nancy Armstrong writes in Desire and Domestic Fiction (1987) that Austen’s objective is not a critique of the Abstract iv old order but rather a redefinition of wealth and status. In Culture and Imperialism (1993) Edward Said implicates Austen in the rationale for imperial expansion, while Barbara Seeber argues in “The Schooling of Marianne Dashwood” (1999) that Austen’s texts should be understood as dialogic. Others, such as Patricia Beer (1974), believe Austen’s fiction primarily to be about marriage since all her novels end with matrimony. My own reading of Austen takes into consideration her social milieu and patriarchal inheritance. It argues that Austen writes within the framework of patriarchy (for example by marrying off her heroines) possibly because she is aware that in order to survive as a woman (writer) in a male-favouring world and in a publishing world dominated by men, her critique needs to be covert. If read from a feminist perspective, Austen’s fiction draws our attention to issues such as women’s (lack of) education, the effects of not being given access to knowledge, marriage as a patriarchal institution of entrapment, and women’s identity. Her fiction reveals the effects of educating women for a life of domesticity, and illustrates that such an education is biased, leaving women powerless and without any means of self-protection in a male-dominated world. Although contemporary women in the Western world mostly enjoy equal education opportunities to men, they suffer the consequences of a legacy which denied them access to a proper education. Feminist writers such as Flis Henwood (2000) show that contemporary women believe certain areas of expertise belong to men exclusively. Others such as Linda Nochlin (1994) reveal that because women did not have access to higher education for so many years, they failed to produce great women artists like Chaucer or Cézanne. Austen’s fiction also exposes the economic and social system (of which education constitutes a major part) for enforcing marriage and for enfeebling women. In addition, it illustrates some of the realities and pitfalls of marriage. While Austen only subtly refers to Abstract v women’s disempowerment within marriage, contemporary feminist scholars such as Germaine Greer (1999) and Arnot, Araújo, Deliyanni, and Ivinson (2000) explicitly warn women that marriage is a patriarchal institution of entrapment and that it often leaves women feeling unfulfilled. The issue of marriage as a patriarchal institution has been thought important and has been addressed by feminists because it contributes to women’s powerlessness. Feminist scholars today find it imperative to expose all forms of power in order to eradicate women’s subordination. bell hooks comments in Feminist Theory: From Margin to Center (2000) on the importance of revealing unfair power relations in order to eliminate oppression of any kind. Austen does not necessarily express the wish to eradicate forms of power or oppression in her novels. Yet, if we read her work from a feminist point of view, we are made aware of the social construction of power. From her fiction we can infer that male power is enshrined in the very structure of society, and this makes us aware of women’s lack of power in her time. Austen’s novels, however, are not merely novels of powerlessness but of empowerment. By creating rounded women characters and by giving them the power to judge, to refuse and to write, Austen challenges the stereotyped view of woman as either overpowering monster or weak and fragile angel. In addition, her novels seem to question women’s inherited identity and to suggest that qualities such as emotionality and mothering are not natural aspects of being a woman. Because she suggests ways in which women might empower themselves, albeit within patriarchal parameters, one could argue that she contributes, in a small way, to the transformation of existing power relations and to the eradication of women’s servile position in society.
- Full Text:
- Date Issued: 2003
Labour law implications of organisational restructuring
- Authors: Grootboom, Linda Henry
- Date: 2003
- Subjects: Labor laws and legislation -- South Africa , Organizational change -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11041 , http://hdl.handle.net/10948/303 , Labor laws and legislation -- South Africa , Organizational change -- South Africa
- Description: It is beyond debate that each job lost due to restructuring means a lost taxpayer, and hence lost tax revenue, more poverty and increased crime. South Africa and the world at the large have to deal with this problem head – on in view of the acute need to better the lives of people and encourage investment. Technological advancement should be embraced and used to benefit people and stimulate economies, and that is further challenge in its own right. In Chapter 8 of the White Paper on Transformation of the Public Service dated 15 November 1995 (hereinafter, the White Paper), it is said that: “The Government of National Unity has embarked upon a concerted and comprehensive programme of administrative restructuring and rationalisation (my emphasis) with the object of: (a) Creating a unified and integrated service. (b) Creating a leaner and more cost-effective service.” Various strategies are listed in the White Paper, and the fundamental approach advocated is to right size, adjust remuneration structures, retrench and contract – out services.
- Full Text:
- Date Issued: 2003
- Authors: Grootboom, Linda Henry
- Date: 2003
- Subjects: Labor laws and legislation -- South Africa , Organizational change -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11041 , http://hdl.handle.net/10948/303 , Labor laws and legislation -- South Africa , Organizational change -- South Africa
- Description: It is beyond debate that each job lost due to restructuring means a lost taxpayer, and hence lost tax revenue, more poverty and increased crime. South Africa and the world at the large have to deal with this problem head – on in view of the acute need to better the lives of people and encourage investment. Technological advancement should be embraced and used to benefit people and stimulate economies, and that is further challenge in its own right. In Chapter 8 of the White Paper on Transformation of the Public Service dated 15 November 1995 (hereinafter, the White Paper), it is said that: “The Government of National Unity has embarked upon a concerted and comprehensive programme of administrative restructuring and rationalisation (my emphasis) with the object of: (a) Creating a unified and integrated service. (b) Creating a leaner and more cost-effective service.” Various strategies are listed in the White Paper, and the fundamental approach advocated is to right size, adjust remuneration structures, retrench and contract – out services.
- Full Text:
- Date Issued: 2003
Observed metabolic changes in male Wistar rats after treatment with an antidepressant implied in undesirable weight gain, or Sutherlandia frutescens for Type II diabetes
- Authors: Chadwick, Wayne
- Date: 2003
- Subjects: Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11068 , http://hdl.handle.net/10948/313 , Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Description: Type II diabetes is fast becoming a growing problem in developed countries worldwide. Traditionally the median age for diagnosis was around sixty, but recent surveys have shown that the entire age distribution curve has shifted to the left. Western countries boast the worst statistics in which type II diabetes is being reported in children under the age of ten. At such a young age the disease often goes undiagnosed for long periods of time allowing considerable damage to occur. The incidence of type II diabetes is thought to be parallel with the growing rate of obesity associated with a characteristically unhealthy western diet. Type II diabetes is an extremely expensive disease to manage, and with the rapid growth of this pandemic our country will soon feel the economic burden of this disease. It is for this reason that cheaper medication needs to be investigated in the form of traditional plants, such as Sutherlandia frutescens. Prescription medication, such as tricyclic antidepressants, may also increase body weight or appetite thereby playing a role in obesity. The cause of weight gain in such cases may go unrecognized or lead to cessation of the medication with or without the practitioner’s knowledge or approval. It is therefore necessary to investigate the causative agents responsible for the excessive weight gain. Drinking water containing extracts of the S. frutescens, metformin (a well known type II diabetes medication) and amitriptyline (a common tricyclic antidepressant) was administered to three groups of ten male Wistar rats. The control group received water without any medication. The rat’s weight and food consumption was monitored throughout the trial and their oxygen consumption was also determined. Rats were sacrificed after four months of medicinal compliance and glucose uptake, in the presence and absence of insulin, was tested in epididymal fat, liver and muscle. Fasting plasma glucose levels, lipoprotein, cholesterol and triglyceride concentrations were also determined.
- Full Text:
- Date Issued: 2003
- Authors: Chadwick, Wayne
- Date: 2003
- Subjects: Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11068 , http://hdl.handle.net/10948/313 , Rats -- Metabolism , Non-insulin-dependent diabetes -- Research , Rats as laboratory animals
- Description: Type II diabetes is fast becoming a growing problem in developed countries worldwide. Traditionally the median age for diagnosis was around sixty, but recent surveys have shown that the entire age distribution curve has shifted to the left. Western countries boast the worst statistics in which type II diabetes is being reported in children under the age of ten. At such a young age the disease often goes undiagnosed for long periods of time allowing considerable damage to occur. The incidence of type II diabetes is thought to be parallel with the growing rate of obesity associated with a characteristically unhealthy western diet. Type II diabetes is an extremely expensive disease to manage, and with the rapid growth of this pandemic our country will soon feel the economic burden of this disease. It is for this reason that cheaper medication needs to be investigated in the form of traditional plants, such as Sutherlandia frutescens. Prescription medication, such as tricyclic antidepressants, may also increase body weight or appetite thereby playing a role in obesity. The cause of weight gain in such cases may go unrecognized or lead to cessation of the medication with or without the practitioner’s knowledge or approval. It is therefore necessary to investigate the causative agents responsible for the excessive weight gain. Drinking water containing extracts of the S. frutescens, metformin (a well known type II diabetes medication) and amitriptyline (a common tricyclic antidepressant) was administered to three groups of ten male Wistar rats. The control group received water without any medication. The rat’s weight and food consumption was monitored throughout the trial and their oxygen consumption was also determined. Rats were sacrificed after four months of medicinal compliance and glucose uptake, in the presence and absence of insulin, was tested in epididymal fat, liver and muscle. Fasting plasma glucose levels, lipoprotein, cholesterol and triglyceride concentrations were also determined.
- Full Text:
- Date Issued: 2003
Occupational medical examinations and labour law
- Authors: Lapere, Jan Noel Romain
- Date: 2003
- Subjects: Employees -- Medical examinations -- South Africa , Labor laws and legislation -- South Africa , Medical screening -- South Africa , Industrial hygiene -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11045 , http://hdl.handle.net/10948/302 , Employees -- Medical examinations -- South Africa , Labor laws and legislation -- South Africa , Medical screening -- South Africa , Industrial hygiene -- South Africa
- Description: South Africa’s Constitution and the Employment Equity Act have a major impact on the performance of medical examinations within the employment relationship. Health and safety statutes list a number of occupational medical examinations, which an employer must perform. Other legislation permits the execution of medical examinations. After listing the different statutory references to occupational medical examinations, this treatise examines under which conditions medical testing is required or permissible. The fairness of employment discrimination based on medical facts, employment conditions, social policy, distribution of employee benefits and inherent job requirement is analysed through a study of the legal texts, experts’ opinions and case studies. The particularities of the ethical and legal duties of the medical professional, performing the occupational medical examination, are also examined. Finally, a comprehensive analysis of the different forms of occupational medical examinations is compiled by combining legal and policy-related job requirements and is attached as an annexure. This is the practical result of the research in this treatise combined with the personal experience of the author.
- Full Text:
- Date Issued: 2003
- Authors: Lapere, Jan Noel Romain
- Date: 2003
- Subjects: Employees -- Medical examinations -- South Africa , Labor laws and legislation -- South Africa , Medical screening -- South Africa , Industrial hygiene -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11045 , http://hdl.handle.net/10948/302 , Employees -- Medical examinations -- South Africa , Labor laws and legislation -- South Africa , Medical screening -- South Africa , Industrial hygiene -- South Africa
- Description: South Africa’s Constitution and the Employment Equity Act have a major impact on the performance of medical examinations within the employment relationship. Health and safety statutes list a number of occupational medical examinations, which an employer must perform. Other legislation permits the execution of medical examinations. After listing the different statutory references to occupational medical examinations, this treatise examines under which conditions medical testing is required or permissible. The fairness of employment discrimination based on medical facts, employment conditions, social policy, distribution of employee benefits and inherent job requirement is analysed through a study of the legal texts, experts’ opinions and case studies. The particularities of the ethical and legal duties of the medical professional, performing the occupational medical examination, are also examined. Finally, a comprehensive analysis of the different forms of occupational medical examinations is compiled by combining legal and policy-related job requirements and is attached as an annexure. This is the practical result of the research in this treatise combined with the personal experience of the author.
- Full Text:
- Date Issued: 2003
Personality traits of patients participating in a group programme at a private psychiatric day clinic
- Authors: Oakes, Elizabeth Jean
- Date: 2003
- Subjects: Personality assessment -- South Africa -- Port Elizabeth , NEO Personality Inventory -- South Africa -- Port Elizabeth , Psychotherapy -- Outcome assessment -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11028 , http://hdl.handle.net/10948/331 , Personality assessment -- South Africa -- Port Elizabeth , NEO Personality Inventory -- South Africa -- Port Elizabeth , Psychotherapy -- Outcome assessment -- South Africa -- Port Elizabeth
- Description: The current trend in psychiatric health care is towards comprehensive primary healthcare for all South Africans. This has been has been achieved by the restructuring of the National Health System (NHS) into national, provincial, district, and community levels, which provide outpatient and inpatient care at primary, secondary, and tertiary care levels. Assessment and treatment in the form of physical and psychosocial interventions form an integral part of psychiatric care. The value of personality assessment and, in particular, the potential for matching patient personality types with effective treatment options, may play a role in facilitating effective health care in the future. An overview of the literature indicates that little research has been done regarding the area of personality traits of psychiatric patients in South Africa. This study aims to explore and describe the personality traits or profile of individuals attending a private psychiatric day care facility in The Nelson Mandela Metropole (i.e., Parkwood Day Clinic). The sample consisted of 196 participants (104 male and 92 female) who attended a group programme from April 2000 to April 2001. As part of the programme, patients were required to com plete a series of pencil-and-paper measures. The questionnaires selected for this study included a biographical questionnaire, which was used to describe the biographical variables of the sample with regard to gender, age and marital status, and The Revised NEO Personality Inventory (NEO PI-R) (Costa & McCrae, 1992a), which was used as a measure of personality. The NEO PI-R is considered a concise measure of the five major domains of personality and some of the more important traits that define each domain. Together, the five domains Neuroticism (N), Extraversion (E), Openness (O), Agreeableness (A) and Conscientiousness (C), and the six facets within each domain, allow for a comprehensive assessment of adult personality. xiv An exploratory, descriptive method was used in the study, and the data was analysed using descriptive and inferential statistics, including correlations, cluster analysis, and multivariate analysis of variance. Key findings include the following: Results from the NEO PI-R domains showed a personality profile of very high scores for N, and average scores for E, O, A, and C. Within the sample, cluster analysis revealed five distinct personality profile clusters. For the biographical variable gender, significant differences were found between males and females on N, with the majority of males scoring in the category of Very High and High, and the majority of females scoring in the Average category. For the variable age, the results indicated significant differences on A, with participants in the young adulthood group scoring significantly lower on A than participants in the middle adulthood group. For marital status, on the domain of O, significant differences were found between the divorced or widowed and the married, with the married scoring in the Low category and the divorced or widowed in the Average category. On the domain of C, significant differences were noted between the singles group and the currently or previously married groups, with the single group tending to score lower on C than both other groups. These findings reveal a need for further research into personality traits and psychiatric samples, as consideration of personality traits based on the profile established, may be useful in matching patients’ characteristics with optimal treatment options.
- Full Text:
- Date Issued: 2003
- Authors: Oakes, Elizabeth Jean
- Date: 2003
- Subjects: Personality assessment -- South Africa -- Port Elizabeth , NEO Personality Inventory -- South Africa -- Port Elizabeth , Psychotherapy -- Outcome assessment -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11028 , http://hdl.handle.net/10948/331 , Personality assessment -- South Africa -- Port Elizabeth , NEO Personality Inventory -- South Africa -- Port Elizabeth , Psychotherapy -- Outcome assessment -- South Africa -- Port Elizabeth
- Description: The current trend in psychiatric health care is towards comprehensive primary healthcare for all South Africans. This has been has been achieved by the restructuring of the National Health System (NHS) into national, provincial, district, and community levels, which provide outpatient and inpatient care at primary, secondary, and tertiary care levels. Assessment and treatment in the form of physical and psychosocial interventions form an integral part of psychiatric care. The value of personality assessment and, in particular, the potential for matching patient personality types with effective treatment options, may play a role in facilitating effective health care in the future. An overview of the literature indicates that little research has been done regarding the area of personality traits of psychiatric patients in South Africa. This study aims to explore and describe the personality traits or profile of individuals attending a private psychiatric day care facility in The Nelson Mandela Metropole (i.e., Parkwood Day Clinic). The sample consisted of 196 participants (104 male and 92 female) who attended a group programme from April 2000 to April 2001. As part of the programme, patients were required to com plete a series of pencil-and-paper measures. The questionnaires selected for this study included a biographical questionnaire, which was used to describe the biographical variables of the sample with regard to gender, age and marital status, and The Revised NEO Personality Inventory (NEO PI-R) (Costa & McCrae, 1992a), which was used as a measure of personality. The NEO PI-R is considered a concise measure of the five major domains of personality and some of the more important traits that define each domain. Together, the five domains Neuroticism (N), Extraversion (E), Openness (O), Agreeableness (A) and Conscientiousness (C), and the six facets within each domain, allow for a comprehensive assessment of adult personality. xiv An exploratory, descriptive method was used in the study, and the data was analysed using descriptive and inferential statistics, including correlations, cluster analysis, and multivariate analysis of variance. Key findings include the following: Results from the NEO PI-R domains showed a personality profile of very high scores for N, and average scores for E, O, A, and C. Within the sample, cluster analysis revealed five distinct personality profile clusters. For the biographical variable gender, significant differences were found between males and females on N, with the majority of males scoring in the category of Very High and High, and the majority of females scoring in the Average category. For the variable age, the results indicated significant differences on A, with participants in the young adulthood group scoring significantly lower on A than participants in the middle adulthood group. For marital status, on the domain of O, significant differences were found between the divorced or widowed and the married, with the married scoring in the Low category and the divorced or widowed in the Average category. On the domain of C, significant differences were noted between the singles group and the currently or previously married groups, with the single group tending to score lower on C than both other groups. These findings reveal a need for further research into personality traits and psychiatric samples, as consideration of personality traits based on the profile established, may be useful in matching patients’ characteristics with optimal treatment options.
- Full Text:
- Date Issued: 2003