https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Counter-hair/gemonies: hair as a site of black identity struggle in post-apartheid South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:3024 Wed 12 Oct 2022 10:10:04 SAST ]]> Thermal and photostability studies of furosemide and its cyclodextrin mixtures https://commons.ru.ac.za/vital/access/manager/Repository/vital:4440 Wed 12 May 2021 23:34:27 SAST ]]> Reengineering the business processes in small, medium and micro enterprises (SMME'S) in order to improve profitability https://commons.ru.ac.za/vital/access/manager/Repository/vital:10850 Wed 12 May 2021 23:24:42 SAST ]]> A cyclic approach to business continuity planning https://commons.ru.ac.za/vital/access/manager/Repository/vital:10788 Wed 12 May 2021 22:23:51 SAST ]]> Thermophilic lignin degrading enzymes from actinomycetes for biotechnological applications https://commons.ru.ac.za/vital/access/manager/Repository/vital:4085 Wed 12 May 2021 20:21:15 SAST ]]> The development of a marketing plan for an emergency medical service https://commons.ru.ac.za/vital/access/manager/Repository/vital:10853 Wed 12 May 2021 20:13:23 SAST ]]> The relationship between three anxiety related clusters in projective drawings and anxiety and ego-strength scales of the Minnesota multiphasic personality inventory-2 https://commons.ru.ac.za/vital/access/manager/Repository/vital:2942 Wed 12 May 2021 20:07:37 SAST ]]> Valuation of intellectual capital in South African companies: a comparative study of three valuation methods https://commons.ru.ac.za/vital/access/manager/Repository/vital:877 Wed 12 May 2021 20:03:08 SAST ]]> The effects of control design and working posture on strength and work output: an isokinetic investigation https://commons.ru.ac.za/vital/access/manager/Repository/vital:5118 Wed 12 May 2021 19:45:01 SAST ]]> Speed-related isokinetic and psychophysical responses of female military personnel https://commons.ru.ac.za/vital/access/manager/Repository/vital:21028 Wed 12 May 2021 19:36:12 SAST ]]> An analysis of how to improve customer relations in local government with particular reference to the Buffalo City Municipality in East London https://commons.ru.ac.za/vital/access/manager/Repository/vital:10917 Wed 12 May 2021 19:28:31 SAST ]]> The effect of selenium in the detoxification of the microcystin hepatotoxins https://commons.ru.ac.za/vital/access/manager/Repository/vital:11070 Wed 12 May 2021 19:26:52 SAST ]]> Gender discourse and Malawian rural communities: a study of the meaning the people of traditional authority Likoswe of Chiradzulo make from human rights and gender messages https://commons.ru.ac.za/vital/access/manager/Repository/vital:3456 Wed 12 May 2021 19:17:42 SAST ]]> An investigation of the neuroprotective effects of estrogen in a model of quinolinic acid-induced neurodegeneration https://commons.ru.ac.za/vital/access/manager/Repository/vital:3759 Wed 12 May 2021 19:03:28 SAST ]]> The identification of factors that contribute to the competitive advantage of the catalytic converter industry cluster in the Eastern Cape https://commons.ru.ac.za/vital/access/manager/Repository/vital:10892 Wed 12 May 2021 19:01:59 SAST ]]> A phenomenological investigation of Windhoek Senior Secondary school principals' perceptions and experiences of their leadership roles https://commons.ru.ac.za/vital/access/manager/Repository/vital:1700 Wed 12 May 2021 18:56:53 SAST ]]> The effect of energy and protein nutritional levels on production of breeding ostriches https://commons.ru.ac.za/vital/access/manager/Repository/vital:5805 Wed 12 May 2021 18:53:48 SAST ]]> An investigation of the effects of leadership training on junior managements' (sic) morale at three manufacturing organisations within the Buffalo City Area https://commons.ru.ac.za/vital/access/manager/Repository/vital:10908 Wed 12 May 2021 18:51:49 SAST ]]> The relationship between the leadership, internal quality, and customer satisfaction levels of dealerships in a South African motor vehicle organisation https://commons.ru.ac.za/vital/access/manager/Repository/vital:1185 Wed 12 May 2021 18:36:05 SAST ]]> The independent high rate algal pond as a unit operation in tertiary wastewater treatment https://commons.ru.ac.za/vital/access/manager/Repository/vital:4092 Wed 12 May 2021 18:30:08 SAST ]]> Investigation of the bioconversion of constituents of olive effluents for the production of valuable chemical compounds https://commons.ru.ac.za/vital/access/manager/Repository/vital:4078 Wed 12 May 2021 18:28:46 SAST ]]> The impact of media commercialisation on programming: a study of Radio Uganda https://commons.ru.ac.za/vital/access/manager/Repository/vital:3453 Wed 12 May 2021 18:20:40 SAST ]]> Finite element simulations of shear aggregation as a mechanism to form platinum group elements (PGEs) in dyke-like ore bodies https://commons.ru.ac.za/vital/access/manager/Repository/vital:5561 Wed 12 May 2021 18:11:32 SAST ]]> Selecting an appropriate process for the formulating of an operations strategy for Bridgestone/Firestone, Port Elizabeth plant, in a changed market environment https://commons.ru.ac.za/vital/access/manager/Repository/vital:10945 Wed 12 May 2021 18:10:45 SAST ]]> Towards the performer-creator in contemporary mime, with specific reference to the physical theatre of Andrew Buckland, 1988-2000 https://commons.ru.ac.za/vital/access/manager/Repository/vital:2158 Wed 12 May 2021 18:05:58 SAST ]]> The variation of conditions of employment https://commons.ru.ac.za/vital/access/manager/Repository/vital:11043 Wed 12 May 2021 17:56:19 SAST ]]> Physiological and perceptual responses of SANDF personnel to varying combinations of marching speed and backpack load https://commons.ru.ac.za/vital/access/manager/Repository/vital:5128 Wed 12 May 2021 17:30:14 SAST ]]> Identifying the need for the development of an instrument to determine senior phase teachers' science-assessment competence https://commons.ru.ac.za/vital/access/manager/Repository/vital:10786 Wed 12 May 2021 17:30:11 SAST ]]> "The wife of Lucifer" : women and evil in Charles Dickens https://commons.ru.ac.za/vital/access/manager/Repository/vital:2189 Wed 12 May 2021 17:21:49 SAST ]]> The influence of structure, density and direct use benefits on the harvesting of trees in the rural village of Pikoi, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:4771 Wed 12 May 2021 17:08:21 SAST ]]> The development of a financial plan to partly cover the cost of frail care in a retirement village in George https://commons.ru.ac.za/vital/access/manager/Repository/vital:10919 Wed 12 May 2021 16:48:52 SAST ]]> The molecular microbial ecology of sulfate reduction in the Rhodes BioSURE process https://commons.ru.ac.za/vital/access/manager/Repository/vital:4082 Wed 12 May 2021 16:43:32 SAST ]]> The role of cellulases and glucohydrolases in the solubilisation of primary sewage sludge https://commons.ru.ac.za/vital/access/manager/Repository/vital:4080 Wed 12 May 2021 16:35:29 SAST ]]> Design, evaluation and comparison of evolution and reinforcement learning models https://commons.ru.ac.za/vital/access/manager/Repository/vital:4625 Wed 12 May 2021 16:30:45 SAST ]]> Broken vessels : the im-possibility of the art of remembrance and re-collection in the work of Anselm Kiefer, Christian Boltanski, William Kentridge and Santu Mofokeng https://commons.ru.ac.za/vital/access/manager/Repository/vital:2395 Wed 12 May 2021 16:30:11 SAST ]]> Evaluation of broiler performance under small-scale and semi-commercial farming conditions in the Northern Province https://commons.ru.ac.za/vital/access/manager/Repository/vital:10964 Wed 12 May 2021 16:23:33 SAST ]]> The development of effective promotional strategies to market public FET/Technical Colleges in the Eastern Cape Province https://commons.ru.ac.za/vital/access/manager/Repository/vital:10940 Wed 12 May 2021 16:20:18 SAST ]]> 'n Kritiese evaluering na die effektiwiteit van bestuurstrategieë vir ekstensiewe wolskaapboerdery in die groter Burgersdorp omgewing https://commons.ru.ac.za/vital/access/manager/Repository/vital:10953 Wed 12 May 2021 16:15:27 SAST ]]> A comprehensive study of the social responsibility practices of two selected financial insitutions https://commons.ru.ac.za/vital/access/manager/Repository/vital:10857 Wed 12 May 2021 15:47:07 SAST ]]> A taxonomic revision of the genus Bergeranthus Schwantes (Mesembryanthemaceae) in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:4248 Wed 07 Jul 2021 14:02:53 SAST ]]> Exploring the suitability of the evaluation criteria used in the MPT projects, by looking at hard and soft components of development programmes https://commons.ru.ac.za/vital/access/manager/Repository/vital:3397 Thu 13 May 2021 16:40:34 SAST ]]> A case study of the language policy in practice in the foundation phase of schooling https://commons.ru.ac.za/vital/access/manager/Repository/vital:1442 Thu 13 May 2021 13:14:16 SAST ]]> "Effulgent in the firmament" the politics of representation and the politics of reception in South Africa's 'poetry of commitment', 1968-1983 https://commons.ru.ac.za/vital/access/manager/Repository/vital:10987 Thu 13 May 2021 13:05:57 SAST ]]> The determination of a strategy for the implementation of learnerships in the catalytic converter canning industry in the Eastern Cape https://commons.ru.ac.za/vital/access/manager/Repository/vital:10851 Thu 13 May 2021 08:20:38 SAST ]]> An investigation into the conflict management styles used in organisations with special reference to some organisations in the northern region of the Eastern Cape Province https://commons.ru.ac.za/vital/access/manager/Repository/vital:10911 Thu 13 May 2021 08:17:51 SAST ]]> The impact of multi-skilling training on the paintshop production environment and its employees at Volkswagen South Africa (VWSA) https://commons.ru.ac.za/vital/access/manager/Repository/vital:10852 Thu 13 May 2021 08:17:50 SAST ]]> A critical review of literature on the expected roles of principals in schools https://commons.ru.ac.za/vital/access/manager/Repository/vital:1914 Thu 13 May 2021 08:09:25 SAST ]]> The adaptation of the Clark (1997) treatment for social phobia into a group therapy format, and a preliminary evaluation https://commons.ru.ac.za/vital/access/manager/Repository/vital:3109 Thu 13 May 2021 07:39:05 SAST ]]> The selection paradox: selecting and evaluating trainee psychologists in the context of narrative theory https://commons.ru.ac.za/vital/access/manager/Repository/vital:3001 Thu 13 May 2021 07:28:43 SAST ]]> The implementation of environmental education policy in Namibia: perceptions of a range of decision-makers https://commons.ru.ac.za/vital/access/manager/Repository/vital:1563 Thu 13 May 2021 07:23:38 SAST ]]> Workshop theatre in post-apartheid South Africa : a case study https://commons.ru.ac.za/vital/access/manager/Repository/vital:2156 Thu 13 May 2021 07:16:39 SAST ]]> Effect of selected physical and production traits on the tick burdens of beef cattle https://commons.ru.ac.za/vital/access/manager/Repository/vital:10966 Thu 13 May 2021 06:47:43 SAST ]]> Formulation and assessment of monolithic beta blocker sustained release tablets prepared by direct compression https://commons.ru.ac.za/vital/access/manager/Repository/vital:3764 Thu 13 May 2021 06:45:58 SAST ]]> Women in paid domestic work and their children : an exploratory study https://commons.ru.ac.za/vital/access/manager/Repository/vital:711 Thu 13 May 2021 06:42:01 SAST ]]> Bad faith: the psychological life of a satanist who committed murder https://commons.ru.ac.za/vital/access/manager/Repository/vital:3152 Thu 13 May 2021 06:33:02 SAST ]]> An investigation into the viability of deploying thin client technology to support effective learning in a disadvantaged, rural high school setting https://commons.ru.ac.za/vital/access/manager/Repository/vital:4627 Thu 13 May 2021 06:32:06 SAST ]]> A history of confession: the dialogue between cynicism and grace in selected novels of J.M. Coetzee https://commons.ru.ac.za/vital/access/manager/Repository/vital:2190 Thu 13 May 2021 06:28:27 SAST ]]> The investigation of the hydrolysis reaction of m-phenylene to resorcinol https://commons.ru.ac.za/vital/access/manager/Repository/vital:10961 Thu 13 May 2021 06:08:05 SAST ]]> GIS in participatory catchment management : a case study in the Kat River Valley, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:4868 Thu 13 May 2021 06:04:09 SAST ]]> Case studies of equivalent fuzzy subgroups of finite abelian groups https://commons.ru.ac.za/vital/access/manager/Repository/vital:5401 Thu 13 May 2021 05:48:23 SAST ]]> State or public service broadcasting?: an analysis of the coverage of political issues and debates during an election campaign on television news https://commons.ru.ac.za/vital/access/manager/Repository/vital:3502 Thu 13 May 2021 05:46:34 SAST ]]> The legal effect of a coup d'etat on traditional constitutional concepts https://commons.ru.ac.za/vital/access/manager/Repository/vital:3684 Thu 13 May 2021 05:44:52 SAST ]]> Traditional leaders in post-1996 South Africa, with particular reference to the Eastern Cape https://commons.ru.ac.za/vital/access/manager/Repository/vital:2857 Thu 13 May 2021 05:39:23 SAST ]]> Diamondback Moth, Plutella xylostella (L.), (Lepidoptera: Plutellidae ), and Other Insects of Canola, Brassica napus L., in Gauteng Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:5937 Thu 13 May 2021 05:33:32 SAST ]]> Achieving successful implementation of lean manufacturing control systems, to achieve world class status, at Ford Motor Componay of Southern Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:10909 Thu 13 May 2021 05:30:06 SAST ]]> Towards a broader socio-ecological education : a case study of school based curricular reform https://commons.ru.ac.za/vital/access/manager/Repository/vital:20973 Thu 13 May 2021 05:23:13 SAST ]]> Sensorless speed estimation in three phase induction motors https://commons.ru.ac.za/vital/access/manager/Repository/vital:10810 Thu 13 May 2021 05:15:54 SAST ]]> Participation and dialogue in development https://commons.ru.ac.za/vital/access/manager/Repository/vital:3148 Thu 13 May 2021 05:05:28 SAST ]]> Design, development and analysis of the friction stir welding process https://commons.ru.ac.za/vital/access/manager/Repository/vital:10809 Thu 13 May 2021 05:04:11 SAST ]]> Rumours of war : de-constructing media discourses of HIV/AIDS in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:3177 Thu 13 May 2021 04:44:56 SAST ]]> Teacher responses to the Namibian education reform : a case study of two Caprivi schools https://commons.ru.ac.za/vital/access/manager/Repository/vital:1791 Thu 13 May 2021 04:36:39 SAST ]]> Representations of women in women's magazines https://commons.ru.ac.za/vital/access/manager/Repository/vital:3475 Thu 13 May 2021 04:35:15 SAST ]]> Society, the body and pain : sociological factors in assessing the meaning and experience of pain in myalgic encephalomyelitis ("yuppie flu") sufferers https://commons.ru.ac.za/vital/access/manager/Repository/vital:3360 Thu 13 May 2021 04:15:55 SAST ]]> Alkane oxidation using metallophthalocyanine as homogeneous catalysts https://commons.ru.ac.za/vital/access/manager/Repository/vital:4449 Thu 13 May 2021 04:08:44 SAST ]]> An exploration of the social worker's role in promoting sustainability of poverty alleviating projects https://commons.ru.ac.za/vital/access/manager/Repository/vital:6058 Thu 13 May 2021 04:06:15 SAST ]]> An investigation into the possible neuroprotective properties of phenytoin https://commons.ru.ac.za/vital/access/manager/Repository/vital:3780 Thu 13 May 2021 04:00:04 SAST ]]> The establishment of an effective farming system for the Allan Waters communal area in the Eastern Cape Province https://commons.ru.ac.za/vital/access/manager/Repository/vital:10821 Thu 13 May 2021 03:50:11 SAST ]]> The development of a model on which to base franchise relationships https://commons.ru.ac.za/vital/access/manager/Repository/vital:10920 Thu 13 May 2021 03:28:56 SAST ]]> Action research : exploring the use [of] print media as a resource in the teaching of English as a second language https://commons.ru.ac.za/vital/access/manager/Repository/vital:2376 Thu 13 May 2021 03:21:41 SAST ]]> Assessing the need for specific services for HIV/AIDS affected people using participatory needs assessment processes https://commons.ru.ac.za/vital/access/manager/Repository/vital:713 Thu 13 May 2021 03:20:14 SAST ]]> Exploring the perceived value of work as part of psychosocial rehabilitation of the state patient : Komani Hospital, Queenstown https://commons.ru.ac.za/vital/access/manager/Repository/vital:5953 Thu 13 May 2021 02:36:04 SAST ]]> The development assumptions of Botswana television : an assessment https://commons.ru.ac.za/vital/access/manager/Repository/vital:3511 Thu 13 May 2021 02:23:17 SAST ]]> An investigation to determine the readiness of management at selected manufacturing organisations in the Buffalo City area to manage the HIV/AIDS epidemic https://commons.ru.ac.za/vital/access/manager/Repository/vital:10906 Thu 13 May 2021 02:22:55 SAST ]]> Accelerated carbon dioxide deliming of cattle hides and sheepskins https://commons.ru.ac.za/vital/access/manager/Repository/vital:3918 Thu 13 May 2021 02:17:58 SAST ]]> Psychological resilience: the role of unconscious and conscious coping strategies in the mediation of stress in high risk occupational contexts https://commons.ru.ac.za/vital/access/manager/Repository/vital:3092 Thu 13 May 2021 02:16:56 SAST ]]> A multivariate model of the offence behaviours of South African serial killers https://commons.ru.ac.za/vital/access/manager/Repository/vital:3169 Thu 13 May 2021 02:00:04 SAST ]]> The evolution of online news: a comparative case study of the process of implementation at two South African news organisations https://commons.ru.ac.za/vital/access/manager/Repository/vital:3447 Thu 13 May 2021 01:53:14 SAST ]]> Aspects pertinent to the provision of sustainable water supply projects in the Eastern Cape Province: a case study of Nomzamo Water Supply Project https://commons.ru.ac.za/vital/access/manager/Repository/vital:5952 Thu 13 May 2021 01:34:30 SAST ]]> Economic impact of international labour migration on Lesotho's development, 1986-1998: towards an international labour migration policy for the Southern African region https://commons.ru.ac.za/vital/access/manager/Repository/vital:1058 Thu 13 May 2021 01:32:41 SAST ]]> Leaders' and participants' perceptions of the management of the Life Science Project in Namibia https://commons.ru.ac.za/vital/access/manager/Repository/vital:1662 Thu 13 May 2021 01:18:36 SAST ]]> A critical investigation into the managerial implications of inclusive education https://commons.ru.ac.za/vital/access/manager/Repository/vital:1477 Thu 13 May 2021 01:16:39 SAST ]]> The remote configuration of devices within home entertainment networks https://commons.ru.ac.za/vital/access/manager/Repository/vital:4685 Thu 13 May 2021 00:56:50 SAST ]]> The evaluation of waste minimization/waste treatment strategies for a commercial production process of 4-methyl-3-thiosemicarbazide https://commons.ru.ac.za/vital/access/manager/Repository/vital:10951 Thu 13 May 2021 00:49:02 SAST ]]> An analysis of the trawl and longline fisheries for Merluccius capensis off the west coast of South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:5218 Thu 13 May 2021 00:48:32 SAST ]]> In the best interests of the child? : a case study of the psychological discourses of the custody decision-making process in a South African context https://commons.ru.ac.za/vital/access/manager/Repository/vital:3153 Thu 13 May 2021 00:43:39 SAST ]]> The biology and molecular ecology of floating sulphur biofilms https://commons.ru.ac.za/vital/access/manager/Repository/vital:4056 Thu 13 May 2021 00:37:11 SAST ]]> Process for the preparation of vanillin from a mixed m-cresol/p-cresol stream https://commons.ru.ac.za/vital/access/manager/Repository/vital:10968 95%) and selectivities (>95%) may be obtained. However, the use of DMF, which poses a serious chronic health risk, is unacceptable in this process since the products are intended for use as food and flavouring chemicals. In view of the above the main objectives of this study were: · To find a suitable alternative solvent system, which could produce comparable results while still being economically viable; · To develop an appropriate experimental protocol in the laboratory based on the alternative solvent system; · To determine the important reaction variables by conducting statistically designed experiments; · To optimise the reaction to produce a reproducible and robust experimental protocol; and · To test the reaction thoroughly at bench-scale level and to obtain experimental data for scale-up to pilot plant The most promising alternative solvent system was a methanol/methyl acetate mixture, which produced satisfactory results in the preliminary assessment (conversion of 98.3% and selectivity of 92.0%). DMA and acetonitrile also produced promising results but were not considered for further investigation because of toxicity and cost issues. A set of statistically designed experiments was carried out on the methanol/methyl acetate solvent system where four variables were tested i.e., substrate concentration, temperature, catalyst loading, and methanol to methyl acetate volume ratio. The experimentally determined response surface model showed that the most important variable was catalyst loading (63.2%) for conversion. With respect to selectivity, the most important variables were catalyst loading (31.9%) and methanol to methyl acetate ratio (33.1%). The optimum reaction conditions were as follows: · Temperature: 120°C · Methanol:methyl acetate: 15:1 vol/vol · Catalyst loading: 8 mol % to substrate · Substrate concentration: 22 %m/m on solvent · Catalyst: Copper(I) bromide · Sodium Equivalents: 2.7 wrt substrate · Time: 3 hours The optimum conditions were tested for reproducibility in a 1 Labmax pressure reactor. Replicated reactions, two at a 10% and two at a 20% substrate concentration gave conversions and selectivities all greater than 90%. Although the reaction mixture was a slurry at these concentrations, the reactions were very fast and virtually complete within the first hour (~95% conversion). Initial scale-up studies were conducted in an 8 Parr reactor where five reactions were carried out using the optimum conditions described above. The conversion of substrate and vanillin selectivity was consistently high and compared favourably to the Labmax reactions. The average conversion was 97.3% (96.3 to 98.5%) at an average selectivity of 98.2% (97.4 to 99.1%). A study of the reaction kinetics confirmed that the reaction was first order with respect to the substrate as a plot of substrate concentration versus reaction rate gave a straight line. The rate constant was calculated as 1.1096 k(h-1). The reaction mechanism proposed for the copper assisted nucleophilic aromatic substitution involves the formation of an adduct between sodium methoxide, methyl acetate and copper(I) bromide. The formation of a transient intermediate with the substrate allows intramolecular delivery of the methoxide ion to the aryl moiety through a CuI – CuIII type cycle.]]> Thu 13 May 2021 00:19:35 SAST ]]> Relationship between temparament and linear body parameters of beef cattle under communal grazing system https://commons.ru.ac.za/vital/access/manager/Repository/vital:10965 Thu 13 May 2021 00:16:19 SAST ]]> Permaculture as an aspect of environmental learning: an investigation into secondary school communities in Zimbabwe https://commons.ru.ac.za/vital/access/manager/Repository/vital:1960 Thu 13 May 2021 00:04:06 SAST ]]> Promotion of liberal values in South African foreign policy : beyond the structural imperatives of the international system? https://commons.ru.ac.za/vital/access/manager/Repository/vital:2865 Thu 01 Feb 2024 09:45:35 SAST ]]>