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Showing results 165391 to 165400 of 182197

  1. Classical lie point symmetry analysis of models arising in contaminant transport theory
    Mkhonta, Zwelithini Fanelo, 2014-03-05T07:49:47Z
    Groundwater contamination and soil salinisation are a major environmental problem worldwide. Living organisms depend largely on groundwater for their survival and its pollution is of course of major concern. It therefore goes without saying that remedial processes and understanding of the mathema ...
  2. Geophysical studies of the crust and uppermost mantle of South Africa.
    Kgaswane, Eldridge Maungwe, 2014-03-05T07:56:51Z
    The general aim of this thesis is to investigate heterogeneity in the structure of the crust and uppermost mantle of Archaean and Proterozoic terrains in southern Africa and to use the findings to advance our understanding of Precambrian crustal genesis. Teleseismic, regional and local seismic re ...
  3. The impact of long-term partial sleep deprivation in unipara mothers
    Strous, Terri Tanya, 2014-03-05T08:39:45Z
    Most sleep deprivation studies show increased body mass, increased hypertension, increased Type 2 Diabetes, obesity, cardiovascular issues and even death. There is a paucity of research in sleeping patterns of first time Caucasian mothers of babies between six and twelve months old in South Africa. ...
  4. Novel syntheses of 5- and 7- azaindole derivatives
    Leboho, Tlabo Caiphus, 2014-03-05T08:46:27Z
    This thesis describes the application of the Sonogashira coupling reaction to access a variety of 5-and 7-azaindoles derivatives. The background chapter paints a picture about the importance of indole-containing compounds and azaindole-containing compounds. In this first chapter, discovery, synth ...
  5. A theoretical investigation of structural, electronic and optical properties of some group 10, 11 and 12 transition-metal nitrides
    Suleiman, Mohammed Suleiman Hussein, 2014-03-05T08:53:25Z
    Nitrides of late transition metals possess interesting properties leading to different technological applications, yet, due to many factors, synthesis and reliable characterization of the physical properties of these materials constitute a big challenge. In this work, we present a detailed firstprin ...
  6. Genotypic and phylogeographic investigation of indigenous and alien Tamarix species in Southern Africa.
    Mayonde, Samalesu Guelor, 2014-03-05T10:01:12Z
    Tamarix (Tamaricaceae) is from the Old World, but has become naturalized and invaded other parts of the world including South Africa. Tamarix usneoides is the only species native to southern Africa, but the exotic species T. aphylla, T. chinensis, T. parviflora and T. ramosissima have been reported ...
  7. The optimization and calibration of spark-optical emission spectroscopy for the analysis of trace impurities in ultra-pure Pt, Pd and Rh
    Mogorosi, Moleboge Prudence, 2014-03-05T11:09:40Z
    Since the industrialization of platinum group metals (PGMs), particularly platinum (Pt), palladium (Pd) and rhodium (Rh), the control of trace impurities in these metals has become vital. Reliable analysis of impurities in these metals is, however a difficult task. Nobel metals are difficult to diss ...
  8. Chemical vapor growth of nitrogen doped carbon nanotube and graphene materials for application in organic photovoltaic devices.
    Bepete, George, 2014-03-05T11:15:42Z
    Application of carbon nanomaterials like fullerene, carbon nanotubes, and graphene in solar cells using solution processable methods presents a great potential to reduce the cost of producing electricity from solar energy. However, carbon nanotubes and graphene materials are predominantly metalli ...