Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 532-551 of 4825
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Catalytic oxidation of alcohols with novel non-heme N4-tetradentate manganese(II) complexes
(RSC, 2018)We report the preparation and characterisation of a series of novel non-heme N4-tetradentate Mn(OTf)2 complexes of the type, [(L)MnOTf2], where L = R,R and S,S enantiomers of BPMCN, its 6-methyl and 6-bromo derivatives as ... -
Category-based phoneme-to-grapheme transliteration
(International Speech Communication Association ( ISCA ), 2013)Grapheme-based speech recognition systems are faster to develop but typically do not reach the same level of performance as phoneme-based systems. In this paper we introduce a technique for improving the performance of ... -
Cavinula lilandae (Bacillariophyta), a new diatom species from the Congo Basin, Central Africa
(Taylor & Francis, 2013)Cavinula lilandae, a small new diatom from the Congo Basin in Central Africa, was observed in acid riverine habitats in an almost pristine tropical rain forest. It occurred in a periphytic diatom community dominated by ... -
Ce0.8Sr0.2CoxFe1-xO3-delta (x=0.2, 0.5, 0.8) - a Perovskite-type nanocomposite for application in the oxygen evolution reaction in alkaline media
(Wiley, 2020)Three perovskite‐type nanocomposites, i. e. Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, CSCF1; 0.5, CSCF2; 0.8, CSCF3), were synthesized employing the sol‐gel technique, subsequent to which they were physically and electrochemically ... -
A cell viability assay to determine the cytotoxic effects of water contaminated by microbes
(Academy of Science of South Africa (ASSAf), 2013)Many South Africans do not have access to safe drinking water, so they have no alternative but to use water from contaminated sources that poses a health hazard. This poor state of affairs appears to be deteriorating. In ... -
Cell-free DNA in a three-dimensional spheroid cell culture model: a preliminary study
(Elsevier, 2017)Background Investigating the biological functions of cell-free DNA (cfDNA) is limited by the interference of vast numbers of putative sources and causes of DNA release into circulation. Utilization of three-dimensional ... -
Cell-free DNA: preanalytical variables
(Elsevier, 2015)Since the discovery of cell-free DNA (cfDNA) in human blood, most studies have focused on diagnostic and prognostic uses of these markers for solid tumors. Except for some prenatal tests and BEAMing, cfDNA analysis has not ... -
Cellular bioenergetics is impaired in patients with chronic fatigue syndrome
(PLOS, 2017)Chronic fatigue syndrome (CFS) is a highly debilitating disease of unknown aetiology. Abnormalities in bioenergetic function have been cited as one possible cause for CFS. Preliminary studies were performed to investigate ... -
Celtis sinensis Pers. (Ulmaceae) naturalised in northern South Africa and keys to distinguish between Celtis species commonly cultivated in urban environments
(AOSIS, 2018)Background: Alien Celtis species are commonly cultivated in South Africa. They are easily confused with indigenous C. africana Burm.f. and are often erroneously traded as such. Celtis australis L. is a declared alien ... -
Centaurus A: hard x-ray and high-energy gamma-ray light curve correlation
(MDPI, 2019)Centaurus A, powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its very-high energy gamma ( γ ) ray ... -
Centaurus A: hard X-ray and soft gamma-ray lightcurve correlation
(Sissa Medialab, 2017)Centaurus A (Cen A), powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its gamma-ray flux, both in the ... -
Central systolic pressure and a nonessential amino acid metabolomics profile: the African prospective study on the early detection and identification of cardiovascular disease and hypertension
(Wolters Kluwer, 2019)Objectives: Early-life exposures to cardiovascular risk factors may manifest as early vascular ageing, a phenomenon to which black populations are more prone. The metabolome provides insight into the current state and ... -
Centre‐based and expedition‐based (wilderness) adventure experiential learning regarding personal effectiveness: an explorative enquiry
(Taylor & Francis, 2011)The purpose of this study is to compare a centre‐based adventure programme (CBAP) with an expedition‐based wilderness programme (EBWP) with regard to personal effectiveness. In comparing these two programmes, this study ... -
Centre‐based and expedition‐based (wilderness) adventure experiential learning regarding personal effectiveness: an explorative enquiry
(Taylor & Francis, 2011)The purpose of this study is to compare a centre-based adventure programme (CBAP) with an expedition-based wilderness programme (EBWP) with regard to personal effectiveness. In comparing these two programmes, this study ... -
A century of taxonomic uncertainty: re-description of two species of tapeworms (Diphyllobothriidea) from Arctic seals
(Springer, 2018)Diphyllobothriid tapeworms are well-known parasites of mammals including humans. Most species are known for centuries, but the validity of many species and their classification are still poorly understood. Based on new ... -
Cephalenchus driekieae n. sp. (Nematoda: Tylenchidae) from South Africa, a new member of the genus with a long pharyngeal overlap
(Exeley, 2020)Cephalenchus driekieae n. sp. is described and illustrated based on its morphological, morphometric, and molecular characteristics. This new species is mainly characterized by its short stylet 11.5 to 13.0 µm, and 13.5 to ... -
Ceratothoa retusa (Schiœdte & Meinert, 1883) (Isopoda, Cymothoidae), a variable species of fish parasitic marine isopod from the Indian Ocean
(Brill Academic Publishers, 2014)Ceratothoa retusa (Schiœdte & Meinert, 1883) is redescribed from the lectotype (here designated) collected from Mozambique, and the range is extended to include the Gulf of Suez in the Red Sea. Ceratothoa retusa is distinctive ... -
Cerebrospinal fluid amino acid profiling of pediatric cases with tuberculous meningitis
(Frontiers Media, 2017)Background: In Africa, tuberculosis is generally regarded as persisting as one of the most devastating infectious diseases. The pediatric population is particularly vulnerable, with infection of the brain in the form of ... -
Cerebrospinal fluid in tuberculous meningitis exhibits only the L-enantiomer of lactic acid
(BioMed Central, 2016)Background: The defining feature of the cerebrospinal fluid (CSF) collected from infants and children with tuberculous meningitis (TBM), derived from an earlier untargeted nuclear magnetic resonance (NMR) metabolomics ... -
Ceropegia terebriformis
(South African National Biodiversity Institute, 2015)