Browsing Faculty of Science by Title

Now showing items 1887-1897 of 1897

    • Wax characterisation by instrumental analysis 

      Webber, Glenda Vanessa (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Various companies produce waxes, which are used extensively in various applications, either as produced or as chemically or physically modified value-added products. They are used in the traditional ...

    • Weakening density dependence from climate change and agricultural intensification triggers pest outbreaks : a 37-year observation of cotton bollworms 

      Ouyang, Fang; Hui, Cang; Men, Xin-Yuan; Zhao, Zi-Hua; Shi, Pei-Jian; Zhang, Yong-Sheng; Li, Bai-Lian (John Wiley & Sons Ltd., 2014-08-12)
      Understanding drivers of population fluctuation, especially for agricultural pests, is central to the provision of agro-ecosystem services. Here, we examine the role of endogenous density dependence and exogenous factors ...

    • Western Zambian sable : are they a geographic extension of the giant sable antelope 

      Jansen van Vuuren, Bettine; Robinson, Terence J.; VazPinto, Pedro; Estes, Richard; Matthee, Conrad A. (South African Wildlife Management Association, 2010-04)
      The giant sable (Hippotragus niger variani) is one of Africa's most spectacular large antelope. Years of civil unrest in Angola, a highly localized distribution and Interbreeding with its congener the roan antelope (H. ...

    • White light wavefront control with a spatial light modulator 

      Dirk-Mathys, Spangenberg; Dudley, Angela; Neethling, Pieter H.; Rohwer, Erich G.; Forbes, Andrew (Optical Society of America, 2014-05)
      Spatial light modulators are ubiquitous tools for wavefront control and laser beam shaping but have traditionally been used with monochromatic sources due to the inherent wavelength dependence of the calibration process ...

    • Wild animals on Marion Island 

      Albertyn, Chris (Stellenbosch : Antarctic Legacy Project, 2012-08-29)
      Footage of the indigenous seals and birds that breed on the island. Note the team members engaging with the animals.

    • Wiskunde van binne en van buite 

      Laurie, Dirk (Stellenbosch : Stellenbosch University, 2001)
      Inaugural address delivered by Dirk Laurie during 2001.

    • Writer-independent handwritten signature verification 

      Swanepoel, Jacques Philip (Stellenbosch : Stellenbosch University, 2015-12)
      AFRIKAANSE OPSOMMING : In hierdie verhandeling stel ons 'n nuwe strategie vir outomatiese handtekening-verifikasie voor. Die voorgestelde raamwerk gebruik 'n skrywer-onafhanklike benadering tot handtekening- modellering ...

    • Y-Chromosome Variation in Hominids: Intraspecific Variation Is Limited to the Polygamous Chimpanzee 

      Greve, Gabriele; Alechine, Evguenia; Pasantes, Juan J.; Hodler, Christine; Rietschel, Wolfram; Robinson, Terence J.; Schempp, Werner (PLoSONE, 2011-12-27)
      Background: We have previously demonstrated that the Y-specific ampliconic fertility genes DAZ (deleted in azoospermia) and CDY (chromodomain protein Y) varied with respect to copy number and position among chimpanzees ...

    • Yeast infection in a beached southern right whale (Eubalaena australis) neonate 

      Mouton, Marnel; Reeb, Desray; Botha, Alfred; Best, Peter (Wildlife Disease Association, 2009)
      A female southern right whale (Eubalaena australis) neonate was found stranded on the Western Cape coast of southern Africa. Skin samples were taken the same day from three different locations on the animal’s body and ...

    • α-Diimine complexes of transition metals for the polymerisation of lower α-olefins 

      Fullaway, Phillip V. (Stellenbosch : University of Stellenbosch, 2005-12)
      In this study several potential polymerisation catalysts were synthesised. This was accomplished by coordinating α-diimine ligands such as N,N'-diferrocenyldiazabutadiene (DFDAB), N,N'-dimesityldiazabutadiene (DMDAB) as ...

    • The α-L-arabinofuranosidase of Aureobasidium pullulans 

      Matthew, Mark Kevin Alexander (Stellenbosch : Stellenbosch University, 2006-04)
      ENGLISH ABSTRACT: The euascomycetous fungus Aureobasidium pullulans produces xylanolytic accessory enzymes, including an α-L-arabinofuranosidase. The deduced amino acid sequence of the abfA gene encoding α-L-arabinofuranosidase ...