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Mitochondrial DNA polymorphisms in Southern African populations.Soodyall, Himladevi January 1993 (has links)
A thesis submitted to the Faculty of Medicine, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. / The subject of this thesis is mitochondrial DNA (mtDNA) variation in southern African populations. The purpose of this study was twofold. Firstly, mtDNA variations were used to investigate the genetic affinities of Negroid, Khoisan, Caucasoid and "Coloured" populations in an attempt to refine theories on southern African population affinities and prehistory.
MtDNA variations were detected using two different methods. The first method makes use of restriction fragment length polymorphisms (RFLPs) detected with the restriction enzymes Hpal, BamUI, Haell, Mspl, Avail and Hindi in 795 unrelated individuals from twenty ethnic groups within the Khoisan, Negroid, Caucasoid and "Coloured" populations from South Africa and Namibia. The combinations of the various restriction enzyme patterns (morphs) for the enzymes Hpal, Bam HI, Hae II, Mspl, Avail and Hindi (in this order), were used to derive the mtDNA type for each individual studied. This resulted in the discovery of 52 distinct mtDNA types: 30 of which had been previously reported, 28 out of 32 resulted from new combinations of enzyme morphs and 4/32 were due to the discovery of new enzyme morphs (MspI-17 in the Ashkenazi Jewish population and AvaII-31, AvaII-32 and AvaII-33 in the South African "Coloured" population).
The second method involves sequencing approximately 750 base pairs of mtDNA contained within the two hypervariable segments within the non-coding control region of the mtDNA molecule in 144 individuals, most of whom where investigated for mtDNA RFLP variations. Pairwise comparisons of mtDNA sequences revealed 119 variant sites which gave rise to 129 unique mtDNA types. / WHSLYP2017
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Funding of Southern African water projects by international donors : a study of ORASECOMMthembu, Hazel Duduzile. January 2015 (has links)
M. Tech. Business Administration / The scarcity of sustainable adequate water resources is one of the world’s leading problems and is currently affecting more than 1.1 billion people in Africa. This research study contributes towards the existing body of knowledge on the criteria applied by the International Co-operating Partners (ICPs) or Donors in financing water projects in Southern Africa. The primary purpose of the study was to explore the rationale behind why ICPs are motivated to fund water projects within Orange-Senqu River Commission (ORASECOM) and also to describe the expectations by ICPs from funding developing countries water infrastructure projects.
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A palynological study of Heliophila (Brassicaceae) in southern AfricaKumwenda, Mphamba Wayera 04 1900 (has links)
On t.p.: Systematics and Biodiversity Science. / Thesis (MSc)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: Pollen grains of the southern African genus Heliophila L. (Brassicaceae), were examined using light microscopy (77
taxa), scanning electron microscopy (82 taxa) and transmission electron microscopy (IOtaxa). The present study
emanates from a pilot study by Kose (200 I) in which palynology was identified as one of the taxonomically
informative data sources that can be used in the classification and subdivision of the genus Heliophila. The aim of
this study was to assess the taxonomic significance of palynological data in the genus Heliophila.
All pollen grains of Heliophila taxa are prolate in shape and tricolpate. The exine surface sculpture varies and two
main groups are identified. In the majority of the taxa the sculpture is psilate or psilate micro-perforate with
suprateetal spinules (Pollen Type A), whereas in the remaining taxa the sculpture is micro-reticulate to reticulate
with or without suprateetal spinules (Pollen Type B). Pollen Type B may be divided further into three subgroups
based on the shape of the lumina and the position of the suprateetal spinules. TEM results also confirm the two main
groups as proposed by the SEM. The structural and sculptural features of the exine proved important in the
demarcation of the pollen grains into two distinctively different pollen types and the other pollen morphological data
such as pollen grain sizes, pollen grain shape are discussed in relation to the groups/subgroups of pollen types. The
sculpturing types are discussed with regard to their evolution and pollination discussed with regard to plant habit
and pollen size.
Cluster analysis, based on vegetative and reproductive characters, excluding palynological characters, was
performed only after the pollen types were identified. These groups were well supported by plant habit, life form,
leaf type, presence or absence of appendages on the filaments, indumentum of filaments and presence of the stipe on
the ovary and divided the genus Heliophila into two main clades. It was observed that this division followed a
sim ilar pattern as the species arrangement in the classification by Marais (1970). AIthough the two main pollen
types occur in both clusters proposed by the morphological analysis, the specific pollen types are restricted to
distinct subclusters.
In conclusion, pollen data reveals that Heliophila is a heterogeneous genus. The present study also reveals that it is
difficult to subdivide the Heliophila taxa into infrageneric units on the basis of palynological evidence alone. In
conjunction with other data sources, it does, however appear to have systematic significance. Therefore, the results
of the present palynological study can be used as an additional source of evidence to support the subdivision of the
Heliophila taxa into infrageneric units in the near future if a better understandinz and classification of the zenus is to b b
be achieved. / AFRIKAANSE OPSOMMING: Stuifmeelkorrels van die suider Afrikaanse genus Heliophila L. (Brassicaceae) is met behulp van ligmikroskopie (77
taksons), skandeerelektronmikroskopie (82 taksons) en transmissie-elektronmikroskopie (IOtaksons) bestudeer. Die
huidige studie is 'n uitvloeisel van 'n lootsprojek deur Kose (200 I) waarin palinologie geïdentifiseer is as een van
die taksonomies-belangrike data-bronne wat in die klassifikasie en subdivisie van die genus Heliophila gebruik kan
word. Die doel van die studie was om die taksonomiese waarde van palinologiese data van die genus Hettophila te
bepaal.
Alle stuifmeelkorrels van Heliophila taksons is prolaat in vorm en trikolpaat. Die oppervlak-skulptuur van die
eksien varieer en twee hoofgroepe word onderskei. In die meerderheid van die taksons is die skulptuur psilaat of
psilaat-mikroperforaat met supratektale uitsteeksels (stuifmeeltipe A), terwyl die skulptuur in die oorblywende
taksons rnikro-retikulaat tot retikulaat met of sonder supratektale uitsteeksels (stuifmeeltipe B) is. Stuifmeeltipe B
kan verder in drie subgroepe, gebaseer op die vorm van die lumens en die posisie van die supratektale uitsteeksels,
verdeel word. Resultate verkry vanaf die TEM bevestig die twee hoofgroepe soos voorgestel deur die SEM-studies.
Die strukturele en skulpturele kenmerke van die eksien blyk belangrik te wees in die verdeling van die
stuifmeelstruktuur in twee duidelike stuifmeeltipes en ander morfologiese kenmerke, byvoorbeeld die grootte en
vorm van die stuifmeelkorrels word bespreek in hul verhouding tot die groepe / subgroepe van die stuifmeeltipes.
Die tipes stuifmeel-skulptuur word bespreek ten opsigte van hul evolusie en bestuiwing word bespreek ten opsigte
van groeiwyse en stuifmeelgroottes.
Groepanalise, gebaseer op vegetatiewe en reproduktiewe kenmerke, uitsluitend palinologiese kenmerke, is
saamgestel nadat die stuifmeeltipes geïdentifiseer is. Die groepe word gevorm op grond van groeiwyse, groeivorm,
blaartipe, aan- of afwesigheid van aanhangsels aan die helmdrade, die indumentum van die helmdrade en die
aanwesigheid van 'n stipe op die vrugbeginsel en verdeel die genus Heliophila in twee hoofgroepe. Daar is
waargeneem dat hierdie analise 'n soortgelyke patroon volg as die spesie-rangskikking in die klassifikasie van
Marais (1970). Alhoewel die twee stuifmeeltipes in beide die morfologiese hoofgroepe aanwesig is, stem die
stuifmeeltipes duidelike ooreen met die sub-groepe wat deur die morfologiese analise gevorm is.
Ten slotte, stuifmeeldata dui daarop dat Heliophila 'n heterogene genus is. Die huidige studie dui ook daarop dat' n
onderverdeling van Heliophila in infrageneriese eenhede op grond van palinologiese kenmerke alleen ook baie
moeilik is, maar saam met ander kenmerke kan stuifmeeldata wel van taksonomiese waarde wees. Dus, die resultate
van hierdie studie kan as 'n aanvullende bron van data gebruik word om 'n onderverdeling van die genus te steun en
'n klassifikasie van die genus daar te stel.
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Decentralisation in SADC countries :transformation and challenges of decentralisation.Issa, Abdul-hakim Ameir January 2004 (has links)
This study focussed on the transformation of the institutions of local government from deconcentration, delegation to devolution. This transformation can be looked at starting with the institutions inherited from the colonial era, which started after the Berlin Conference of 1884, which divided Africa among the western powers. Then the transformation, which took place immediately after independence / that is the period of 1960s, the changes made in the 1980s and finally the transformation taking place following the multiparty democracy in the 1990s. The study looked at decentralisation during the colonial period / decentralisation after independence, with a particular focus on the institutions under a single party system / transformation of local government under multiparty system. It also examined the challenges facing decentralisation in the SADC region.
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Energievraag- en aanbodprojeksies vir die TBVC-lande en Front-linie state09 February 2015 (has links)
M.Phil. / Please refer to full text to view abstract
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Factors influencing the design and implementation of EAP content-based courses for second-language underprepared students at tertiary level : a Southern African perspective.Kotecha, Piyushi. January 1993 (has links)
A thesis submitted to the Faculty of Education, in
fulfillment of the requirements for the degree of Master of
Education / This study explores the factors which influence the design
and implementation of EAP content-based courses for second-language
learners at tertiary level. It draws upon
international experience in this area, information from a
case study of an adjunct EAP, content-based engineering
course at the University of the Witwatersrand and the
experience of other EAP practitioners in Southern Africa.
A set of key ,comprehensive factors which affect the
success and effectiveness of EAP content based courses are
identified. / Andrew Chakane 2018
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Factors influencing the design and implementation of EAP content-based courses for second-language underprepared students at tertiary level : a Southern African perspective.Kotecha, Piyushi January 1993 (has links)
A thesis submitted to the Faculty of Education, in
fulfillment of the requirements for the degree of Master of
Education / This study explores the factors which influence the design
and implementation of EAP content-based courses for second language
learners at tertiary level. It draws upon
international experience in this area, information from a
case study of an adjunct EAP, content-based engineering
course at the University of the Witwatersrand and the
experience of other EAP practitioners in Soutllern Africa.
A set of key, comprehensive factors which affect the
success and effectiveness of EAP content-based courses are
identified. / Andrew Chakane 2019
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Major developments in the rural indigenous architecture of southern Africa of the Post-Difaqane periodFrescura, Franco 08 August 2014 (has links)
Thesis (Ph.D.)--University of the Witwatersrand, Faculty of Architecture,1985.
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Discerning and explaining shape variations in Later Stone Age tanged arrowheads, southern AfricaSmeyatsky, Ilan Ryan January 2017 (has links)
A dissertation submitted in fulfilment of the requirements for the Degree of Master of Science in Archaeology of the University of Witwatersrand in 2017. / Over the past decade a new method of statistical shape analysis, geometric morphometrics, has been applied to the study of artefact shapes. Later Stone Age (LSA) tanged stone arrowheads, hypothesized to act as stylistic markers among prehistoric southern African hunter-gatherer groups, have been analysed with geometric morphometrics and reveal spatially coherent variations in their shape. After being tested against several variables that may have had an effect on arrowhead shape, these stylistic spatial variations could very well indicate large scale linguistic or other kinds of boundaries between different elements of prehistoric San populations. Understanding them can shed light on the social and economic organization of southern African hunter-gatherers during the later Holocene. / LG2017
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The politics of liberation heritage in postcolonial southern Africa, with special reference to MozambiqueJopela, Albino Pereira de Jesus January 2017 (has links)
A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. Johannesburg, 2017. / This study analyses the politics of liberation heritage in postcolonial southern Africa with special reference to Mozambique. The aim is to scrutinise the different ways in which liberation heritage discourse is used and mobilised to construct a range of socioeconomic and political values in the southern African region and to examine the processes of heritagization in Mozambique based on field observations at two national heritage sites: Chilembene and Matchedje. I adopt the conceptualisation of heritage as discourse and put the hegemonic Western heritage discourses into historical perspective in order to explore how this Western understanding of the past has influenced the official discourse and practice in southern Africa in both colonial and postcolonial periods. I argue that the process of re-appropriation and ‘mimicry’ which allow the perpetuation of Western paradigms in the conception of heritage result from a combination of geopolitical and socio-economic contexts and circumstances at play nationally, regionally and globally, combined with the strategies adopted by former national liberation movement’s ruling elites to pursue their own nationalist agendas related to state-crafting and nation-building. I also argue that the recent traction that has led to the institutionalisation of liberation heritage discourse in southern Africa, represents a specific way in which former national liberation movements, now in government, have tried to respond to changes in circumstances marked by an increasing contestation by the different social groups over the content of the official discourse of ‘the past’, based on selective memories of the liberation struggle, in an increasingly disputed multi-party democratic dispensation. To understand the politics of heritagization of the liberation struggle in postcolonial Mozambique, I look at FRELIMO’s efforts to undertake selective celebrations and to silence particular ‘pasts’ for particular ‘presents’ during the struggle years as well as through the different socio-political and economic contexts of the successive presidencies: Samora Machel (1975-86), Joaquim Chissano (-2004) and Armando Guebuza (-2014). By (1) addressing the question of why and how the heritagization of this particular category of the past (i.e. liberation heritage) accomplishes the reproduction of state power held by ruling elites of former national liberation movements, and by (2) illustrating the networks of meanings and practices on which liberation heritage rests, and by (3) analysing the socioeconomic, cultural and political work it does, this study contributes to the embryonic body of knowledge about heritage processes in southern Africa. / LG2017
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