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Showing results 162061 to 162070 of 168416

  1. 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. ...
  2. 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 ...
  3. 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 ...
  4. 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 ...
  5. 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 ...
  6. 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 ...
  7. Tumour suppressor proteins in proliferating and differentiating cells
    Bodalina, Umesh Madan, 2014-03-05T11:20:24Z
    Cells have evolved the ability to change continuously and adapt to their environment. An important way in which this dynamic modulation is achieved is by reversible phosphorylation, mediated by protein kinases and phosphatases. This thesis focuses on the temporal variations in expression of the prot ...
  8. Representation of moon phases : a textbook analysis and case study of Grade 8 learners understanding
    Bhulana, Lubabalo Albert, 2014-03-05T11:30:08Z
    The aim of the study was to investigate the quality of diagrams and explanations of moon phases in grade 6 to 8 Natural Science textbooks; to establish whether the textbooks provide scientifically correct content information for learners and teachers and to investigate whether the textbooks used for ...