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Showing results 161981 to 161990 of 168416

  1. Optimization of microbial adsorption (Biofilm Creation) on activated carbon by surface modification of substrate.
    Sabbagh, Lee-At, 2014-02-25T10:33:03Z
    Conversion of biomass to useful bio-products is a lengthy and often inefficient process. Research has looked at the conversion of cellulose to ethanol by means of termite bacterial consortium in fluidized bed bioreactor, where the bacteria are attached as biofilm to an activated carbon or cellulo ...
  2. Development and evaluation of a dense media cyclone for the Southern African mineral and coal industries
    Singleton, J. D., 2014-02-25T10:42:06Z
    Dense media separation (DMS) plays an integral part in coal processing as well as in the upgrade of low grade ore bodies prior to further processing like flotation and leaching. Various separating vessels are used in DMS; of which the dense media (DM) cyclone is the most common. However, the limi ...
  3. Chemical engineering modelling of a vegetated submerged reedbed for winery effluent treatment
    Sheridan, Craig Michael, 2014-02-25T10:48:33Z
    Environmental concerns for wineries in South Africa cover not only the conversion of effluent into more benign forms, but the reclaiming of water, a resource that is scarce and precious in a drought-prone country. However, not all waste treatment options are available to small wineries, because many ...
  4. Stochastic portfolio theory and its applications to equity management
    Bonney, Lisa, 2014-02-25T12:18:47Z
    Stochastic portfolio theory is a novel methodology, developed by Fernholz (2002), for analysing stock and portfolio behaviour, and equity market structure, constructing portfolios and understanding the structure of equity markets. It thus has immediate applications to equity portfolio management a ...
  5. Molecular variability of cassava Bemisia tabaci and its effects on the spread of cassava mosaic begomoviruses in East Africa
    Mugerwa, Habibu, 2014-02-25T12:29:54Z
    Bemisia tabaci is the vector of cassava mosaic begomoviruses and cassava brown streak viruses which are main production constraints to cassava in sub-Saharan Africa. Current vector dynamics involved in the spread of both viruses in the region was established through comparison of the mitochondria cy ...
  6. Trade in commonly used medicinal bulbs: value and ecological implications
    Brueton, Vanessa Jean, 2014-02-25T12:38:30Z
    The relationship between human activity and the environment has created ecological, socio-economic and cultural patterns and feedback mechanisms that govern the presence, distribution and abundance of plant species assemblages. The trade in traditional medicinal plants in South Africa is estimated t ...
  7. Thermoresponsive behaviour of selected mixed metal oxides
    Nyoni, Michelle Sibonokuhle, 2014-02-25T12:45:32Z
    Low-to-negative thermal expansion is an important property for materials in a wide range of applications including space applications, microwave components, construction, mirrors, dental fillings and high precision ion dilatometers. Powder X-ray diffraction (PXRD) has been used to investigate the th ...
  8. Trends and factors associated with invasive non-typeable and serotype B Haemophilus influenzae disease in persons of all ages in South Africa from 2003-2009
    Fortuin-de Smidt, Melony Cathlin, 2014-02-25T12:51:48Z
    Haemophilus influenzae type b disease (Hib) was a major cause of childhood disease but has nearly been eliminated in developed countries after the introduction of Hib conjugate vaccine. An increase in non-typeable H. influenzae (NTHi) disease was observed in some countries post-Hib vaccination wh ...
  9. Tooth size prediction formulae: a preliminary study on data derived from a sample of South African white and black patients
    Pasquale, Taryn Di, 2014-02-25T13:06:25Z
    The aim of this study was to derive the best combination of teeth with which new prediction equations could be formulated, resulting in more accurate prediction of the combined sizes of the permanent canine and premolar teeth for the white and black South African populations. The mesio-distal too ...