In this study we investigated methods to increase tea quality by developing quality markers for the breeder, as well as methods to improve quality during the manufacturing process. The compounds investigated for identifying quality markers were the major green leaf flavan-3-ols, caffeine and the major theaflavins. To be able to analyze the theaflavins in the manufactured black tea, we developed a non-aqueous capillary electrophoresis method. This non-aqueous capillary electrophoresis method can also be used to improve tea quality by optimizing the black tea manufacturing procedure. We also investigated the ability of improving the tea quality by the addition of tannase to alter the contents of the individual theaflavins in the black tea. To identify flavan-3-ols and theaflavins related to tea quality, twenty good and twenty poor quality tea clones were selected from the breeding programme at the Tea Research Foundation of Central Africa. The contents of the individual flavan-3-ols of fresh tea leaves and the contents of the individual theaflavins were analyzed with capillary electrophoresis. Total theaflavin and individual theaflavin content was determined in the black tea manufactured from the same leaves for each clone. The above parameters were correlated with total scores and valuation from two tea tasters with regression analysis. The significance of the differences between the good and poor quality clones was determined with the Student’s t-test and the distribution free Kruskal-Wallis test. Our results suggest that (-)-epicatechin and (-)-epicatechin gallate contents of the fresh leaf can be used to predict the quality potential of new clones early in the breeding programme. The suitability of quality improvement during the manufacturing stage was also investigated by the addition of tannase. The added tannase resulted in statistical significant increase in free theaflavins. With the use of a low dose of tannase, a significant increase in the tea quality was observed by one tea taster. / Thesis (PhD (Biochemistry))--University of Pretoria, 2006. / Biochemistry / unrestricted

This thesis focuses on the design of a lodge and all its components, which include accommodation, exhibition spaces, conference facilities, restaurants, public services, fishing dams and a certain amount of cottages. Regarding accommodation, the proposed lodge would be able to provide for large groups of people, but would still adhere to the more private needs of those individuals who prefer to travel alone. Mkhonda Lodge and Educational farm is situated on farm Madola outside the town of Piet Retief, Mpumalanga. Piet Retief is integrated as part of a major tourist route that connects KwaZulu-Natal with Swaziland and the Kruger National Park. This means that a considerable amount of tourists inevitably pass through the town without adequate available accommodation or restaurants to satisfy their needs. Sustainable building practices and appropriate technologies guide the design process in terms of the use of local materials and labour; construction techniques; and resource and waste management. Local labor plays an important role in an effort to educate the local community. All the buildings are predominantly constructed of straw bales which are used as infill between the timber pole post-and-beam roof structures. Building elements are standardized to create a modular system which adds to the idea of keeping the design simple and easy to construct. The design strives to create spatial balance and harmony for interior and exterior spaces, environmentally friendly yet functional infrastructure and materials, low maintenance, ergonomic solutions, and respect for our environment and resources. The ideal is that visitors are educated in an informal way through experiencing unconventional construction methods and design approaches. In essence, this thesis continuously emphasizes respect for the site, its users through generally integrating a more holistic approach. / Dissertation (MArch (Prof))--University of Pretoria, 2006. / Architecture / unrestricted

no abstract available / Thesis (PhD (Practical Theology))--University of Pretoria, 2007. / Practical Theology / unrestricted

no abstract available / Dissertation (MArch (Prof))--University of Pretoria, 2007. / Architecture / unrestricted

The objective with this research project was to contribute to existing theory on product related consumer socialization, more specifically concerning young upcoming consumers in a third world country like the Republic of South Africa. Problems that are experienced by inexperienced consumers were discussed within the context of changing socio political conditions in recent years, which have resulted in the adoption of different lifestyles and spending patterns of previously disadvantaged consumers. During the past decade the living conditions of especially black consumers have improved considerably. Better jobs and higher incomes have resulted in access to home ownership and consequently also the acquisition of expensive, durable commodities such as household appliances to support and reflect their new lifestyles. Unfortunately limited product related exposure and experience might contribute to specific problems that need to be addressed by professionals in Consumer Science in order to contribute to informed, responsible buyer decisions in the market place. The intention was to suggest strategies through which inexperienced consumers could be assisted to cope in a very competitive and materialistic world. The research was positivistic in nature and was conducted within a quantitative paradigm although qualitative methods were included to verify the content and structure of the questionnaire. The geographic area in which the study was conducted, was conveniently located near the University of Pretoria. Unfortunately difficult access to potential participants because of security issues made it difficult to recruit participants. Most of the contacts were made during the evenings. Financial constraints were experienced: participants were unwilling to participate without an incentive and the researcher had to make provision for small gifts as a token of appreciation. Time was another limiting factor: data collection had to be done within a limited period because this study formed part of a larger research project that involved other students and different samples. Field workers were trained to assist with the data collection. The system’s theory was used to direct the content and discussions of the study: product related consumer socialization (i.e. appliance ownership and product experience) was thus considered as an input that affected consumers’ product knowledge and their consequent ability to transform product cues in terms of product decisions which would reflect informed, responsible buyer decisions, or the contrary (outcome). Findings confirmed participants’ limited product related consumer socialization. Limited experience with appliances was evident from limited ownership of most of the appliances over time, except for refrigerators and stoves. Participants’ impression of the usefulness of appliances in households was confirmed by their apparent enthusiasm to acquire almost all of the major appliances that were listed in the future. The product knowledge test confirmed participants’ limited ability to conclude informed buyer decisions and explicated their unrealistic expectations of the service life of appliances as well as their apparent reliance on surrogate indicators to judge the quality of appliances. When participants were confronted with a product complaint scenario, most of the complaints could be ascribed to incorrect use of appliances and/or ignorance, which supported the notion that these consumers would not be able to conclude responsible buyer decisions. A concerted effort by retail to provide augmented customer service in the retail environment so that consumers could be facilitated at point of purchase is recommended. It is also proposed that consumers’ limited product knowledge and the problems that they have indicated concerning the use of appliances should be addressed to enhance informed and responsible buyer and user behaviour. / Dissertation (M (Consumer Science))--University of Pretoria, 2007. / Consumer Science / unrestricted

Church music is in a crisis! The current debate in the Dutch Reformed Church concerning Church Music is not a case of reformed against charismatic. The different kinds of church music as well as the different approaches to church music, is part of the essence and history of the church and church music. Throughout history there has always been a need for a more free and often lighter kind of music (hymn) complimentary to formal church music. This need has often lead to conflict in the church. Often the conflict was caused by the power of the association of a certain kind of music, rather than the music itself. On the positive side, it has not only lead to conflict, but it has also lead to the creation of some of the most beautiful songs of praise and worship throughout history. This need for other and new kinds of music is emphasized by the differences in culture between various churches and congregations. Because of the close relation between music and culture, different cultures and meta-cultures often lead to different kinds of music in the church. Culture, and especially post modern culture, stresses the need for the congregation’s owns song and music alongside the song and music of the broader church. The influence of culture in church music can’t be denied. No music is per se reformed. Reformed spirituality, as an umbrella term, makes provision for differentiation in church music due to the fact that the faces of reformed spirituality differ from place to place and time to time. Because of the latter, reformed spirituality finds expression in different kinds of music. In the light of the above mentioned, the free song could be of great value alongside the formal church music in the reformed churches, especially the Dutch Reformed Church. The hypothesis of this study is not only that there is room for the free song alongside the formal church song, but that it is essentially part of Church song and music. A new approach, based on objective study, and stripped of subjectivism, is needed in this regard. Only the can the conversation of the ages really make benefit the church as a whole. / Dissertation (MA (Practical Theology))--University of Pretoria, 2007. / Practical Theology / unrestricted

Today’s consumers demand much more than quality products – they also value the service that is provided in the retail environment highly (Arnold, 2003:78; Samson&Little, 1993:390) From retailers’ perspective, customer service may have become the only way to differentiate them from competitors because the products that they offer often differ insignificantly from one store to another. Excellent customer service therefore may be the only opportunity to attract and to attain customers to the extent that it results in store loyalty. Unfortunately limited research could be found on customer service that would conquer the hearts and wallets of consumers in specific retail settings for the sake of store loyalty. Extant research mostly address single, very specific elements of customer service or customer service in general in terms of its effect on buyer behavior or store patronage in general. It was proposed that retailers could enhance customers’ repeat purchase behaviour if they could successfully increase customer satisfaction through improved service quality. In order to identify the elements of customer service that are considered crucial in terms of excellent customer service and repeat purchase behaviour, an attempt was made to determine why consumers often divide their purchases across different supermarkets that apparently stock the same goods. The research thus required the identification of the elements of customer service that individually and/or collectively affect consumers’ preference for specific supermarket/s and their probable repeat purchase behaviour. This study also explored how consumers rate the service of supermarkets and attempted to make suggestions in terms of how retailers could improve customer service to ensure consumer loyalty. The systems theory approach was used to guide discussions, as it enabled a study and understanding of the sequence, relationship and interdependency of fundamental elements of customer service (as subsystems ) within a larger complex system (retail environment). The cognitive perspective was incorporated in the discussion of the elements of customer service as it enabled the understanding of customers’ interpretation of customer service. Participants were recruited by means of snowball sampling within the area of Pretoria East in the geographical area of Tshwane. In this area, major supermarkets are located within close proximity, which is conducive for shop hopping. It was required that participants either resided and/or shopped in the specific area; they were from LSM groups 5 and higher; older than 25 years, but no requirements were set in terms of race or gender. A quantitative data collection method was used (a survey: questionnaire). A qualitative data collection technique (focus group discussions) was however implemented beforehand to include every day constructs and to include additional constructs that might have been overseen. It became evident that consumers apparently patronage different supermarkets on a regular basis and that the customer service of some of the supermarkets are viewed significantly better than others. The elements of customer service that are more severely criticized seem to be mostly PROCESS and PERSONNEL related. Through factor analysis and linear regression, three elements of customer service were identified as those that are apparently regarded crucial in terms of excellent customer service. Two familiar elements, namely PROCESSES and PERSONNEL as well as a newly structured element, namely VALUE FOR MONEY was identified to design a model that depicts the elements of customer service that were identified to be crucial in terms of excellent customer service. / Dissertation (M (Consumer Science))--University of Pretoria, 2007. / Consumer Science / unrestricted

The purpose of this abstract is to report on the results of the study conducted to identify misconceptions concerning chemical equilibrium concepts, and to investigate the effectiveness of Laboratory Based Teaching (LBT) compared to Traditional Based Teaching (TBT) on University of Limpopo Foundation Year (UNIFY) students' understanding of chemical equilibrium concepts. The subjects of this study consisted of 53 UNIFY students from two chemistry classes. The data were obtained from 27 students receiving LBT and 26 students in the TBT. The validated Misconception Identification Test (MIT) was administered to diagnose students’ misconceptions in different areas of chemical equilibrium. Analysis of the Pre-MIT and open-ended responses revealed widespread misconceptions such as: • Left – and right – sidedness: Students perceive each side of a chemical equation as a separate physical quantity. • The constancy of the equilibrium constant: This includes the ability to judge when and how the chemical equilibrium constant changes. This possible misconception refers to the changes in concentration, pressure and temperature as well as the addition of a catalyst. For example, students fail to grasp the influence of the catalyst on a chemical system, viz., that it has an effect on the reaction rates but not on the equilibrium as such. They perceive the catalysts as leading to a higher yield of the product. • Rate versus extent: Inability to distinguish how fast the reaction proceed (rate) and how far (extent) the reaction goes. • Definition of equilibrium constant expression: Inability to relate the equilibrium concentrations of reactants and products using the equilibrium law. • Misuse of Le Chaterlier’s principle: The application of Le Chaterlier’s type reasoning in inappropriate situations. To address the identified misconceptions, practical based activities on certain aspects of chemical equilibrium were developed as resource material for one group of students (Laboratory Based Teaching - LBT) and similar activities having the same chemistry content consisting of tutorial questions, theoretical background of some aspects and some experiments were used as resource material for the other group (Traditional Based Teaching - TBT). After both instructions, analysis of the Pre MIT and Post MIT results using t – test statistic for each group revealed significant difference between the means of the sample. This implied that both instructions have contributed significantly to the students’ improvement in their misconceptions. Again after both instructions, analysis of the Post MIT results for the two groups using the t-test revealed a significant difference between the two group’s sample means. This implied that the misconceptions in the LBT group were reduced significantly as compared to misconceptions held by students in the TBT group. After both instructions, more students in the LBT group had correct representation of mental models of reactions in equilibrium than the students in the TBT group. Implications for science education classroom practice are also discussed. / Dissertation (MSc (Chemistry))--University of Pretoria, 2007. / Chemistry / unrestricted

The objectives of this study were to evaluate the quantity and quality of cashmere produced by South African indigenous goats under different environmental conditions and to compare two techniques (Video Image Analyser-VIA and Optical Fibre Diameter Analysis-OFDA) which were used for fibre diameter analysis. The study was conducted in Irene, University of Pretoria, Mara, Delftzyl, Roodeplaat and Centurion. In this study three breeds namely Indigenous, Boer and Savanna goats were used and a total of 217 animals were combed during the moulting season (July to September) in 1997. Location and colour of the animals had significant effects on fibre yield and diameter (P<0.05). The Boer goats produced significantly (P<0.05) more fibre, which was coarser, compared to the indigenous goats, irrespective of age of the animal. The savanna goats produced good quality cashmere which was comparable to that produced by Boer goats and indigenous goats. Males produced significantly more and coarser fibre than females (P< 0.05). Reproductive status did not show any significant effects (P>0.05) on yield but the lactating animals produced very little cashmere per annum. Age had no significant effects (P>0.05) on total yield and diameter although both yield and diameter increased with age. According to the results of this experiment, the VIA technique resulted in more accurate fibre diameter values compared to the OFDA technique. The cashmere fibre diameters measured by the VIA were 5 <font face="symbol">m</font>m finer than with the OFDA, while guard hair diameters by the OFDA were 27 <font face="symbol">m</font>m thicker than diameters by the VIA. The correlation between these two techniques was very low, with r2 of 27.1 for cashmere and 16.0 for guard hair respectively. The South African indigenous goats produced good quality (fine) fibre, with fibre diameter ranging between 9 and 14 <font face="symbol">m</font>m, although the quantity was very small. This fibre diameter range meets the requirements for cashmere diameter as recommended by the cashmere industry. / Dissertation (MSc (Animal Production))--University of Pretoria, 2007. / Animal and Wildlife Sciences / unrestricted

Field data were collected and analysed on the feeding and spatial ecology of brown hyaenas living in the Makgadikgadi National Park and in an adjacent Wildlife Management Area where local subsistence pastoralists live. The responses of the pastoralists to a questionnaire designed to document their perceptions of and attitudes towards brown hyaenas and other carnivores that live in the vicinity of their residences, were also analysed. Brown hyaenas living in the Makgadikgadi National Park have different diets from hyaenas living in the vicinity of pastoralists. In pastoralist areas livestock carcasses were the most important food source and other less important food types were fed on as they became seasonally available. In the Makgadikgadi National Park zebra was the most important food source although several other food types were seasonally important. In the pastoralist areas dietary breadth was similar over the lean and the peak seasons, while in the Makgadikgadi National Park, when food availability was low in the lean season, the brown hyaenas increased their dietary breadth and fed off a greater number of species of food. In the lean season they also changed their foraging behaviour. There was no evidence to suggest that any livestock species were hunted by the brown hyaenas as springhares and Cape hares were the only mammals observed to be hunted, and only occasionally. Home range sizes were smaller for brown hyaenas living in the vicinity of pastoralists than for hyaenas living in the Makgadikgadi National Park. The size of the home range was found to be dependent on the average distance between the significant food sources. In the Makgadikgadi National Park the seasonal home range size fluctuated greatly due to the variability of seasonal food available, while in the pastoralist areas food availability was less varied and as a consequence seasonal home range size varied less than in the national park. Although pastoralists believed that black-backed jackals killed the most number of individual livestock animals, lions had the greatest perceived negative economic impact, followed by black-backed jackals, spotted hyaena and then brown hyaena. Wild dog, caracal, cheetah and leopard were also believed to have killed a small number of livestock animals. The general understanding of the brown hyaena is that it is a predator that survived by feeding on hunted livestock. As a consequence of this they were hated and frequently killed by the farmers. In spite of their persecution the brown hyaena populations are viable in the cattle areas and appear not to be under any immediate threat. However, efforts to reduce the number of brown hyaenas killed in the long-term would be beneficial in ensuring that brown hyaena populations in cattle areas remain viable. / Dissertation (MSc (Zoology))--University of Pretoria, 2007. / Zoology and Entomology / unrestricted