Now showing items 747-766 of 942

  • Riverine dominance of a nearshore marine demersal food web: evidence from stable isotope and C/N ratio analysis 

    de Lecea, A.M.; Smit, Albertus J.; Fennessy, S.T. (National Inquiry Services Centre (NISC), 2016)
    The Thukela Bank, KwaZulu-Natal, supports a diverse ecosystem and South Africa’s only prawn fishery. Oceanographic studies suggest riverine input is not important for the biology of this system, whereas biological studies ...
  • A robust spectral method for solving Heston’s model 

    Ngounda, E.; Patidar, Kailash C.; Pindza, E. (Springer Verlag, 2014)
    In this paper, we consider the Heston’s volatility model (Heston in Rev. Financ. Stud. 6: 327–343, 1993]. We simulate this model using a combination of the spectral collocation method and the Laplace transforms method. ...
  • The role of encrusting coralline algae in the diets of selected intertidal herbivores 

    Maneveldt, Gavin; Wilby, Deborah; Potgieter, Michelle; Hendricks, Martin G.J. (Springer Verlag, 2006)
    Kalk Bay, South Africa, has a typical south coast zonation pattern with a band of seaweed dominating the mid-eulittoral and sandwiched between two molluscan-herbivore dominated upper and lower eulittoral zones. Encrusting ...
  • The role of ground water in Sub-Saharan Africa 

    Braune, Eberhard; Xu, Yongxin (Wiley-Blackwell, 2010)
    Although water resources managers speak of a water crisis in Africa, the management of ground water has to date not featured strongly in national and regional African water agendas. Examination of the physical environment of ...
  • The role of Outcome Mapping in developing a rural telemedicine system 

    Tucker, William David; Blake, Edwin H. (International Information Management Corporation, 2008)
    We describe the use of Outcome Mapping to guide the design of a rural telemedicine consultation system in South Africa. While Outcome Mapping was not primarily intended to guide design, we show that it tied in well with a ...
  • The role of Severe Acute Respiratory Syndrome (SARS)-Coronavirus Accessory Proteins in Virus Pathogenesis 

    McBride, Ruth; Fielding, Burtram C. (MDPI, 2012)
    A respiratory disease caused by a novel coronavirus, termed the severe acute respiratory syndrome coronavirus (SARS-CoV), was first reported in China in late 2002. The subsequent efficient human-to-human transmission of ...
  • The roles of star formation and AGN activity of IRS sources in the HerMES fields 

    Feltre, Anna; Hatziminaoglou, Evanthia; Vaccari, Mattia; Hernán-Caballero, Antonio; Fritz, Jacopo; Franceschini, Alberto; Bock, J.; Cooray, Asantha; Farrah, Duncan; Gonzalez-Solares, Eduardo A.; Ibar, Edo; Isaak, Kate G.; Lo Faro, Barbara; Marchetti, L.; Oliver, Seb J.; Page, Matthew J.; Rigopoulou, Dimitra; Roseboom, Isaac G.; Symeonidis, Myrto (Oxford University Press, 2013)
    In this work we explore the impact of the presence of an active galactic nucleus (AGN) on the mid- and far-infrared (IR) properties of galaxies as well as the effects of simultaneous AGN and starburst activity in these ...
  • Rural Wireless Mesh Network Analysis on Mobile Devices 

    Tiemeni, Ghislaine Livie Ngangom; Venter, Isabella; Tucker, William David (Telkom SA, 2014)
    The aim of this research effort is to build an efficient and accurate mobile traffic generator based on open source computer-based traffic generator software. A high performance mobile traffic generator would make the ...
  • Rutin as a potent antioxidant: implications for neurodegenerative disorders 

    Enogieru, Adaze Bijou; Haylett, William; Hiss, Donavon Charles; Bardien, Soraya; Ekpo, Okobi Eko (Hindawi Publishing Corporation, 2018)
    A wide range of neurodegenerative diseases (NDs), including Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, and prion diseases, share common mechanisms such as neuronal loss, apoptosis, mitochondrial ...
  • RuxNb1-xO2 catalyst for the oxygen evolution reaction in proton exchange membrane water electrolysers 

    Puthiyapura, Vinod Kumar; Pasupathi, Sivakumar; Basu, Suddhasatwa; Wu, Xu; Su, Huaneng; Varagunapandiyan, N.; Pollet, Bruno G.; Scott, Keith (Elsevier, 2013)
    Bimetallic catalyst system of ruthenium oxide (RuO2) and niobium oxide (Nb2O5) was prepared using the Adams method and the hydrolysis method. Physical and electrochemical characterizations of the catalysts were studied ...
  • Salicylaldiminato chromium complex supported on chemically modified silica as highly active catalysts for the oxidation of cyclohexene 

    Titinchi, Salam J.J.; Abbo, Hanna S. (Elsevier, 2013)
    Immobilization of chromium complexes on modified silica support was achieved via two different synthetic routes using 3-aminopropyl triethoxysilane (APTS) as a linking group. The FTIR spectra, elemental and solid-state NMR ...
  • Salinity of irrigation water in the Philippi farming area of the Cape Flats, Cape Town, South Africa 

    Aza-Gnandji, Ruben C.D.; Xu, Yongxin; Raitt, Lincoln; Levy, Jonathan (Water Research Commission, 2013)
    This paper explores the nature, source and spatial variation of the salinity of water used for irrigation in a coastal urban farming area in Cape Town, South Africa, where water from the Cape Flats aquifer is drawn into ...
  • Sample variance, source clustering and their influence on the counts of faint radio sources 

    Heywood, Ian; Jarvis, Matt; Condon, James J. (Oxford University Press, 2013)
    The shape of the curves defined by the counts of radio sources per unit area as a function of their flux density was one of the earliest cosmological probes. Radio source counts continue to be an area of astrophysical ...
  • Scale insects on ericas : an apparently natural, unnoticeable threat to local biodiversity 

    Maneveldt, Gavin (Botanical Society of South Africa, 2008)
    Introduction: An excursion into the Limietberg Nature Reserve in the Bain's Kloof Mountains during the winter of 2006, one that I have undertaken regularly over the past ten years or so, had revealed a noticeably high ...
  • Scale-dependent orientation in movement paths: a case study of an African viper 

    Maritz, Bryan; Alexander, Graham J. (Wiley, 2016)
    Decisions relating to the orientation of movement by animals and how this translates into movement patterns can occur at multiple spatial scales simultaneously, but this interaction is poorly understood for many groups of ...
  • The scientific merit of Carpobrotus mellei L. based on antimicrobial activity and chemical profiling 

    Springfield, E. P.; Weitz, Frans (Academic Journals, 2006)
    Species of the genus Carpobrotus are similar in appearance and have been used for medicinal purposes over many generations. Carpobrotus mellei is endemic to the south-Western Cape of South Africa, and also used for various ...
  • A search for p-mode pulsations in white dwarf stars using the Berkeley Visible Imaging Tube detector 

    Kilkenny, David; Welsh, B.Y.; Koen, Chris; Gulbis, A.A.S.; Kotze, M.M. (Oxford University Press, 2014)
    We present high-speed photometry (resolution 0.1 s) obtained during the commissioning of the Berkely Visible Imaging Tube system on the Southern African Large Telescope (SALT). The observations were an attempt to search ...
  • The search for the ideal biocatalyst 

    Burton, Stephanie G.; Cowan, Donald A.; Woodley, John M. (Nature Publishing Group, 2002)
    While the use of enzymes as biocatalysts to assist in the industrial manufacture of fine chemicals and pharmaceuticals has enormous potential, application is frequently limited by evolution-led catalyst traits. The advent ...
  • Seasonal variation of citrinin in traditionally brewed African beer 

    Ikalafeng, B.K.; Pool, Edmund John; Lues, R.; Groenewald, W.H. (Academic Journals, 2013)
    A seasonal study on citrinin concentrations in traditional beer was conducted using a standardised enzyme-linked immunosorbent assay. Representative samples of indigenous South African beer were collected during the hot, ...
  • Seaweed diversity associated with a Brazilian tropical rhodolith bed 

    Amado-Filho, Gilberto M.; Maneveldt, Gavin; Pereira-Filho, G.H.; Manso, R.C.C.; Bahia, Ricardo (Universidad Autónoma de Baja California, 2010)
    This study describes the predominantly tropical, subtidal seaweed populations growing on rhodoliths between 4 and 18 m depth in the southern part of Espírito Santo State (Brazil). Qualitative and quantitative sampling ...