M.Comm. / The realities of competing in today’s rapidly changing environment require flexible leadership styles, motivation, empowerment, creativity and innovation to drive maximum performance. The core of leadership today is the art of mobilising and putting together the intellectual resources of all employees (i.e. skills, knowledge and experience) of the organisation to maximise productivity. Most organisations are experiencing the challenges of understanding that leadership styles do have a significant impact on performance and employee motivation. This study investigates the relationship between these concepts (i.e. leadership, motivation and performance) and the impact they have on employees and the organisation. A quantitative research project was conducted within the De Beers Corporate Headquarters through an online survey. A random sample of employees at various job levels and within various disciplines was selected. A total of 310 questionnaires were distributed and a response rate of 79% was achieved. The main findings of the research discovered that a significant relationship exists between the style of leadership demonstrated in a particular situation and the impact it has on the motivation and performance levels of employees in an organisation. Recommendations are made regarding improvements and changes that should be made should the study be repeated in the future. The recommendations include: putting in place measures to recognise and reward the successful implementation of new ideas made by employees; consider providing employees with flexibility in terms of structuring their remuneration packages and negotiating flexible working arrangements; putting in place performance systems that recognise and reward team performance adequately and consistently; putting in place measures to monitor the evaluation and tracking of poor performers within De Beers and regularly benchmark the reward system with ii world-class systems to ensure that De Beers remains competitive and is able to retain its exceptional performers. Limitations of the study were identified and outlined. The main limitation was that the research study was limited only to employees based at the headquarters and did not include employees at the various operations in other regions. This results in limited respondents’ perceptions, which would have been better enhanced if all operations were included in the study. The research has added value in that it will ensure that De Beers leaders are aware of the various leadership styles that they can use. This can establish a broader understanding of how and when to use the various leadership styles to ensure maximum performance, through happy and motivated employees.

This memorandum outlines the role of De Beers and its leading position in the international diamond industry. It is designed to give a brief overview of the “diamond pipeline” that leads from prospecting and mining of diamonds in remote parts of Africa and elsewhere to glamorous jewellers’ shops the world oven It looks particularly at the unique and important role South Africa plays in the diamond pipeline.

Thesis (MPhil)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

Sewage effluents disposed into the marine environment from De Beers Marine Namibia diamond mining vessels have the potential to cause endocrine disruptive effects in marine organisms. Endocrine disruption refers to the alteration of the normal functioning of the endocrine system and various chemicals have the ability to mimic hormones, effecting endogenous hormone synthesis, transport, receptor interaction and intracellular signaling. The potential endocrine disruptive effects, caused by the release of different types of sewage effluents into the ocean, on fish species is a concern due to the commercial importance of fish species found in the mining area e.g. hake, sole, horse mackerel. Increased awareness of marine environmental degradation due to the presence of chemical contaminants has resulted in research being done on early warning systems, in the form of biomarkers. Cytochrome P450 monooxygenase 1A (CYP1A) and vitellogenin (vtg) are important proteins found in fish liver and blood, that have been used as biomarkers for the detection of pollutants in fish. CYP1A is a subfamily of the P450 superfamily of enzymes and catalyzes the oxidation, hydrolysis and reduction of exogenous and endogenous compounds (phase I reactions) and thus has the capacity to regulate the metabolism of several organic contaminants. CYP1A expression is altered by exposure to planar xenobiotic compounds e.g. polyaromatic hydrocarbons. Vtg is an important precursor for egg yolk proteins and plays a role in the growth and development of an oocyte. Expression of this protein is altered upon exposure to estrogenic compounds. The aim of this project was to isolate CYP1A from fish liver by differential centrifugation and optimize conditions for the CYP1A-mediated ethoxyresorufin-Odeethylase (EROD) assay and western blot analysis (to assess CYP1A expression). Another aim of this study was to evaluate the potential effects of biologically disruptive chemicals from sewage effluents, discharged into the marine environment, on the expression of CYP1A in two species of hake, Merluccius capensis and M. paradoxus (Cape hake). CYP1A in Cape hake is approximately a 60 kDa protein and the highest EROD activity was detected in the microsomal fraction after differential centrifugation. Optimal EROD assay conditions were observed at pH 7.5, a temperature of 25 °C, 10 μl of sample and a reaction time of 30 seconds. Enzyme stability assays indicated a drastic decrease in enzyme activity after 30 seconds. The EROD assay was not NADPH dependent but was limited by NADPH supply, with an increase of 300% in EROD activity being observed with the addition of 0.1 M exogenous NADPH. The addition of dicumarol (40 μM), a phase II enzyme inhibitor, showed a 232% increase in EROD activity. This is because dicumarol inhibited enzymes with the capacity to metabolize the product (resorufin) of the EROD reaction. With regard to western blot analysis, the optimal primary (rabbit antifish CYP1A peptide) and secondary (anti-mouse/rabbit antibody-horseradish peroxidase conjugate (POD)) antibody dilutions were determined to be 1:1000 and 1:5000, respectively. The comparison of CYP1A expression in Cape hake samples from De Beers Marine mining area and reference sites showed higher EROD activity (16.29 ± 0.91 pmol/min) in fish samples from the mining area in comparison to the reference site (10.42 ± 2.65 pmol/min). Western blot analysis was in agreement with the EROD assay results and a higher CYP1A expression was observed in fish from the mining sites. The increased CYP1A expression observed in fish from the mining area is not definitively an indication of a pollutant effect in the environment, as several environmental and biological factors (e.g. photoperiod and age) must also be considered before reaching this conclusion. Another aim of this study was to purify vtg from Cape hake blood samples. Cape hake vtg was purified from fish plasma by selective precipitation with MgCl2 and EDTA. Precipitated sample was subjected to anion exchange chromatography using fast protein liquid chromatography (FPLC). Vtg eluted as two broad peaks and had a molecular weight above 200 kDa. SDS-PAGE analysis also resolved smaller molecular weight proteins below 70 kDa, which were thought to be vitellogenin cleavage proteins, lipovitellin and phosphovitins. Western blot analysis was performed; however, it did not produce any conclusive results. The purification of vtg enables further studies in characterizing this protein and developing assay aimed at detecting estrogenic pollutants in the marine environment

The study investigates the establishment and development of the Kimberley Africana Library and its mother institution, the Kimberley Public Library within the broader social, economical and political environment in which they took place. The history of these institutions is inextricable until 1984 when the public and Africana sections of the Library were separated and the Kimberley Africana Library was opened to the public in 1986. It was the exceptional collections of Africana and rare books which distinguished the Kimberley Public Library and the main factor which bound the history of these two institutions. The Kimberley Public Library and its progeny the Kimberley Africana Library are the products of a new industrialised era which came about after the discovery of diamonds in South Africa. They emanated from an environment which produced the new wealth of the country, an almost uncharted region which was relatively new to the established British colonies. In order to place the origins of and motivation for the establishment of the Kimberley Public Library and the Kimberley Africana Library in perspective, it is necessary in this study also to include an overview of the development of the diamond mining industry in Kimberley. This development, peculiar as it was to Kimberley, gave rise to the type of social and cultural milieu in which the Public Library was founded by the immigrants to this area. Also included in the study is a brief survey of the development of the library movement in South Africa and the role played by the Kimberley Public Library in the growth of this movement and in the expansion of public library services to the people of the country. The history of the Kimberley Public/Africana Library which covers a period of more than a century is divided into three distinct periods, namely that which deals with the institution as a Subscription Library from 1882 until 1960 and, from 1961 as a free library under the jurisdiction of the Kimberley Municipality and affiliated to the Cape Provincial Library Service. The third period concerns the dichotomisation of the Kimberley Public Library and the establishment of the Kimberley Africana Library in 1986 to house the Library’s renowned collection of Africana and rare books. This section also deals with the period after 1994 when the Kimberley Libraries functioned under the new political dispensation in South Africa. Emphasis is laid on the formation, nature and scope of the Africana Collection which was the raison d’etre for the establishment of the Kimberley Africana Library and the most significant of the items in the collection are broadly described. The study concludes with an assessment of the challenges the Kimberley Africana Library faces and suggests ways and means of resolving these. An Appendix entitled The Founders and the Builders is added in order to elaborate on the exceptional contributions of several prominent Committee members and Librarians who controlled and managed these institutions from their inception in 1882 until 2008. / Information Science / M. Inf. (Information Science)

The study investigates the establishment and development of the Kimberley Africana Library and its mother institution, the Kimberley Public Library within the broader social, economical and political environment in which they took place. The history of these institutions is inextricable until 1984 when the public and Africana sections of the Library were separated and the Kimberley Africana Library was opened to the public in 1986. It was the exceptional collections of Africana and rare books which distinguished the Kimberley Public Library and the main factor which bound the history of these two institutions. The Kimberley Public Library and its progeny the Kimberley Africana Library are the products of a new industrialised era which came about after the discovery of diamonds in South Africa. They emanated from an environment which produced the new wealth of the country, an almost uncharted region which was relatively new to the established British colonies. In order to place the origins of and motivation for the establishment of the Kimberley Public Library and the Kimberley Africana Library in perspective, it is necessary in this study also to include an overview of the development of the diamond mining industry in Kimberley. This development, peculiar as it was to Kimberley, gave rise to the type of social and cultural milieu in which the Public Library was founded by the immigrants to this area. Also included in the study is a brief survey of the development of the library movement in South Africa and the role played by the Kimberley Public Library in the growth of this movement and in the expansion of public library services to the people of the country. The history of the Kimberley Public/Africana Library which covers a period of more than a century is divided into three distinct periods, namely that which deals with the institution as a Subscription Library from 1882 until 1960 and, from 1961 as a free library under the jurisdiction of the Kimberley Municipality and affiliated to the Cape Provincial Library Service. The third period concerns the dichotomisation of the Kimberley Public Library and the establishment of the Kimberley Africana Library in 1986 to house the Library’s renowned collection of Africana and rare books. This section also deals with the period after 1994 when the Kimberley Libraries functioned under the new political dispensation in South Africa. Emphasis is laid on the formation, nature and scope of the Africana Collection which was the raison d’etre for the establishment of the Kimberley Africana Library and the most significant of the items in the collection are broadly described. The study concludes with an assessment of the challenges the Kimberley Africana Library faces and suggests ways and means of resolving these. An Appendix entitled The Founders and the Builders is added in order to elaborate on the exceptional contributions of several prominent Committee members and Librarians who controlled and managed these institutions from their inception in 1882 until 2008. / Information Science / M. Inf. (Information Science)