Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 3690-3709 of 4825
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Recent Asian origin of chytrid fungi causing global amphibian declines
(AAAS, 2018)Globalized infectious diseases are causing species declines worldwide, but their source often remains elusive. We used whole-genome sequencing to solve the spatiotemporal origins of the most devastating panzootic to date, ... -
Recent business transformation in intermediate-sized cities in South Africa
(Elsevier Science, 2011)Significant spatial and structural changes have occurred in the business sector of intermediate-sized cities in South Africa since the mid-1990s. These changes can largely be ascribed to responses of entrepreneurs, from ... -
Recent progress in the development of semiconductor-based photocatalyst materials for applications in photocatalytic water splitting and degradation of pollutants
(Wiley, 2017)Photocatalytic approaches in the visible region show promising potential in photocatalytic water splitting and water treatment to boost water purification efficiency. For this reason, developing cost-effective and efficient ... -
Receptor modelling and risk assessment of volatile organic compounds measured at a regional background site in South Africa
(Elsevier, 2018)Volatile organic compounds (VOCs) can have significant impacts on climate and human health. Certain VOCs are proven to be carcinogenic and toxic, which can affect human health directly and indirectly. In order to develop ... -
Receptor-mediated potencies of polycyclic aromatic hydrocarbons in urban sediments: comparisons of toxic equivalency risk assessment
(Springer, 2019)The Klip River, flowing through South Africa’s most populated urban area—Soweto and Lenasia—is subject to various pollution and anthropogenic influences, including great concentrations of polycyclic aromatic hydrocarbons. ... -
Recessive germline SDHA and SDHB mutations causing leukodystrophy and isolated mitochondrial complex II deficiency
(BMJ Publishing Group, 2012)Background Isolated complex II deficiency is a rare form of mitochondrial disease, accounting for approximately 2% of all respiratory chain deficiency diagnoses. The succinate dehydrogenase (SDH) genes (SDHA, SDHB, SDHC ... -
Recombinant Newcastle disease viruses with targets for PCR diagnostics for rinderpest and peste des petits ruminants
(Elsevier, 2018)Since February 1st 2011, rinderpest (RP) has been officially declared eradicated worldwide. National authorities have been requested to destroy all their RP related materials. Nonetheless, their national reference laboratories ... -
Recombinant rotaviruses rescued by reverse genetics reveal the role of NSP5 hyperphosphorylation in the assembly of viral factories
(ASM, 2020)Rotavirus (RV) replicates in round-shaped cytoplasmic viral factories, although how they assemble remains unknown. During RV infection, NSP5 undergoes hyperphosphorylation, which is primed by the phosphorylation of a single ... -
Reconceptualising sustainability assessment
(Elsevier, 2017)Sustainability assessment as an ex ante tool for directing decision-making towards sustainability has emerged in a diverse range of forms across the world over the past decade or so. This broad practice of sustainability ... -
Reconsidering disaster resilience: a nonlinear systems paradigm in agricultural communities in Southern Africa
(Springer, 2018)Disasters continue to have a dramatic impact on lives, livelihoods and environments communities depend on. In response to these losses, the global community has developed various theories, assessment methodologies and ... -
Recover of KAu (CN)2 from granular activated carbon using supercritical CO2
(Elsevier, 2008)The recovery of KAu(CN)2 preloaded onto activated carbon by pure and cosolvent entrained supercritical carbon dioxide (sc-CO2) was investigated using a laboratory-size supercritical extractor. Gold on the carbon surface ... -
Recovering the damping rates of cyclotron damped plasma waves from simulation data
(Cambridge Univ Press, 2017)Plasma waves with frequencies close to the particular gyrofrequencies of the charged particles in the plasma lose energy due to cyclotron damping. We briefly discuss the gyro-resonance of low frequency plasma waves and ... -
Recovery of uranium from nuclear conversion plant waste
(SAIMM, 2017)The ammonium diuranate (ADU) conversion process that was operated at the Nuclear Energy Corporation of South Africa (Necsa) in the past generated a significant amount of waste containing high concentrations of uranium, ... -
Recycling pre-oxidized chromite fines in the oxidative sintered pellet production process
(SAIMM, 2019)The chromium (Cr) content of stainless steel originates from recycled scrap and/or ferrochrome (FeCr), which is produced mainly by the carbothermic reduction of chromite ore. The oxidative sintered pellet production process ... -
Redescription and molecular characterisation of the fish ectoparasite Anilocra capensis Leach, 1818 (Isopoda: Cymothoidae), with description of six new species of Anilocra Leach, 1818 from Africa
(BioMed Central, 2019)Background: Anilocra capensis Leach, 1818 is the only named species of Anilocra Leach, 1818 from South Africa. Anilocra is a large genus (>40 species) with high levels of diversity reported from the Caribbean and Indo-West ... -
Redescription and molecular characterisation of the fish parasitic isopod Norileca indica (Milne Edwards, 1840) (Crustacea: Isopoda: Cymothoidae) with a key to the genus
(Taylor & Francis, 2017)Norileca indica (Milne Edwards, 1840) is fully redescribed based on ovigerous females collected from Maputo Bay, Mozambique, from the branchial cavity of the fish host Selar crumenophthalmus Bloch, 1793. An identification ... -
Redescription and molecular diagnosis of Hepatozoon theileri (Laveran, 1905) (Apicomplexa: Adeleorina: Hepatozoidae), infecting Amietia quecketti (Anura: Pyxicephalidae)
(Praha : Academia, 2014)Blood smears prepared from the peripheral blood of 20 wild caught Amietia quecketti (Boulenger) from the North-West University Botanical Gardens, North West Province, South Africa, were examined for the presence of ... -
Redescription of Ichthyoxenus puhi (Bowman, 1962) (Isopoda, Cymothoidae), parasite of the moray eel Gymnothorax griseus (Lacépède, 1803) from Mauritius
(Brill Academic Publishers, 2014)Ichthyoxenus puhi (Bowman, 1962) is reported for the first time from Mauritius on the host Gymnothorax griseus (Lacépède, 1803), expanding its distribution from Hawaii to the western Indian Ocean. I. puhi is characterized ...