Browsing Faculty of Science by Title
Now showing items 2184-2200 of 2200
-
Wax characterisation by instrumental analysis
(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
(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
(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. ...
-
What is the possible origin of the 195Pt NMR shielding in the solid state? X-ray diffraction, solid-state NMR studies of deceptively simple C2[PtX6] salts (C = various cations, X = Cl- and Br-)
(Stellenbosch : Stellenbosch University, 2015-03)ENGLISH ABSTRACT: The primary objective of the work presented in this thesis is to investigate the sensitivity and nature of the 195Pt chemical shift in the solid-state, as a function of temperature. We have carried out ...
-
When homoplasy mimics hybridization : a case study of Cape hakes (Merluccius capensis and M. paradoxus)
(PeerJ, 2016)In the marine environment, an increasing number of studies have documented introgression and hybridization using genetic markers. Hybridization appears to occur preferentially between sister-species, with the probability ...
-
White light wavefront control with a spatial light modulator
(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 ...
-
Whole body modelling of glucose metabolism in malaria patients
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT : Diagnosing a patient with a disease is typically done by considering a list of clinical symptoms. For severe malaria two of the key pathophysiological indicators for poor chances of survival are ...
-
Wild animals on Marion Island
(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
(Stellenbosch : Stellenbosch University, 2001)Inaugural address delivered by Dirk Laurie during 2001.
-
The world without birds : an experimental test of the ecological significance of pollinating birds for plant communities
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT: Since pollinators are declining in many parts of the world, it is vital to understand the consequences of pollinator loss. How will plant communities be affected? If pollinators are keystone mutualists, ...
-
Writer-independent handwritten signature verification
(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
(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
(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 ...
-
Young grapevine response and root colonisation following inoculation with arbuscular mycorrhizal fungi
(South African Society for Enology and Viticulture, 2004)The host plant response following inoculation with commercially available arbuscular mycorrhizal (AM) fungi was determined in young grapevines under field conditions which would prevail on a typical farm. Measurements ...
-
Zeta diversity as a concept and metric that unifies incidence-based biodiversity patterns
(The University of Chicago Press, 2014-11)Patterns in species incidence and compositional turnover are central to understanding what drives biodiversity. Here we propose zeta (ζ) diversity, the number of species shared by multiple assemblages, as a concept and ...
-
α-Diimine complexes of transition metals for the polymerisation of lower α-olefins
(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
(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 ...