Browsing Faculty of Natural Sciences by Title
Now showing items 2071-2090 of 2571
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The role of Outcome Mapping in developing a rural telemedicine system
(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
(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 ... -
Role of the methoxy group in product formation via TiCl4 promoted 4-phenyldioxolane isomerizations
(ARKAT USA INC, 2010)The product distribution obtained from the TiCl4 initiated intramolecular isomerizations of 4- methoxyphenyl- and trimethoxyphenyldioxolanes at -78 oC, -30 oC and 0 oC provided insights into the important regiochemical ... -
The roles of star formation and AGN activity of IRS sources in the HerMES fields
(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 ... -
Rooibos (Aspalathus linearis) genome size estimation using flow cytometry and k-mer analyses
(MDPI, 2020)Plant genomes provide information on biosynthetic pathways involved in the production of industrially relevant compounds. Genome size estimates are essential for the initiation of genome projects. The genome size of rooibos ... -
Rotational structures in 196Hg
(University of the Western Cape, 2019)High spin states in 196 Hg were populated in the 198 Pt (α,6n) reaction at 65 MeV and γ −γ coincidence measurements were performed using the AFRODITE array at iThemba LABS. The level scheme was extended and new rotational ... -
ROV assessment of mesophotic fish and associated habitats across the continental shelf of the Amathole region
(Nature Research, 2021)Understanding how fsh associate with habitats across marine landscapes is crucial to developing efective marine spatial planning (MSP) in an expanding and diversifying ocean economy. Globally, anthropogenic pressures ... -
Rural Wireless Mesh Network Analysis on Mobile Devices
(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
(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
(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
(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
(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
(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 ... -
Sampling bias in reptile occurrence data for the Kruger National Park
(AOSIS, 2020)To effectively conserve and manage species, it is important to (1) understand how they are spatially distributed across the globe at both broad and fine spatial resolutions and (2) elucidate the determinants of these ... -
Sampling bias in reptile occurrence data for the Kruger National Park
(OpenJournals Publishing AOSIS (Pty) Ltd, 2020)To effectively conserve and manage species, it is important to (1) understand how they are spatially distributed across the globe at both broad and fine spatial resolutions and (2) elucidate the determinants of these ... -
Sandstone reservoir zonation of the north-western Bredasdorp Basin South Africa using core data
(Elsevier, 2021)This study delineates sandstone reservoir flow zones in the north-western Bredasdorp Basin, offshore South Africa, using conventional core porosity and permeability data. The workflow begins by integrating sedimen- tology ... -
SASOCP position statement on the pharmacist’s role in antibiotic stewardship 2018
(AOSIS Publishing, 2018)Antibiotics are the most commonly prescribed medicines in global healthcare practice today. Their effectiveness is crucial and often life-saving in humanity’s battle against pathogens and infectious diseases. Antibiotic/ ... -
Scalar-tensor theories of gravity, neutrino physics, and the H0 tension
(IOP Publishing, 2020)We use Planck 2018 data to constrain the simplest models of scalar-tensor theories characterized by a coupling to the Ricci scalar of the type F(σ)R with F(σ) = N2 pl + ξσ2 . We update our results with previous Planck ... -
Scale insects on ericas : an apparently natural, unnoticeable threat to local biodiversity
(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
(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 ...