Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 301-320 of 4825
-
Arsenic-based warfare agents: production, use, and destruction
(Taylor & Francis, 2014)Since the beginning of time, civilizations have looked for more creative ways to dominate and defeat their enemies. The rapid development of the chemical industry just before the Second World War started the era of modern ... -
Artificial neural networks: applications in the drinking water sector
(IWA Publishing, 2018)Artificial neural networks (ANNs) could be used in effective drinking water quality management. This review provides an overview about the history of ANNs and their applications and shortcomings in the drinking water sector. ... -
Artisanal fisheries in the Ndumo area of the Lower Phongolo River floodplain, South Africa
(AOSIS, 2015)The aim of this study was to investigate the status of artisanal fisheries in the lower Phongolo River floodplain in northern KwaZulu-Natal, South Africa. A cross-sectional quantitative survey design was used that included ... -
Aspects influencing the selection of representative urbanization measures to quantify urban-rural gradients
(Springer Science, 2011)The quantification of urban–rural gradients using urbanization measures has become standard practice in many urban ecological studies. Nonetheless, the choice of urbanization measures for a specific urban gradient still ... -
Aspects that need to be addressed during the development of location-based games
(Springer, 2018)To determine the suitability of a software development methodology (SDM) to aid in the development of location-based games, it is necessary to determine to what degree SDMs address certain aspects that need to be addressed ... -
Aspidoglossum albocoronatum (Apocynaceae, Asclepiadoideae), a new species with a remarkable petaloid corona from the northern provinces of South Africa
(Magnolia Press, 2016)Aspidoglossum albocoronatum Bester & Nicholas is a unique species from Sekhukhuneland in Mpumalanga and southern Leolo Mountains in Limpopo, South Africa. In morphological character it belongs to the southern African ... -
Assessing cellular energy dysfunction in CFS/ME using a commercially available laboratory test
(Nature, 2019)The mitochondrial energy score (MES) protocol, developed by the Myhill group, is marketed as a diagnostic test for chronic fatigue syndrome/Myalgic Encephalomyelitis (CFS/ME). This study assessed the reliability and ... -
Assessing predator-prey interactions in a chemically altered aquatic environment: the effects of DDT on Xenopus laevis and Culex sp. larvae interactions and behaviour
(Springer, 2019)Behavioural assays are used as a tool to understand ecotoxicological effects on organisms, but are often not applied in an ecologically relevant context. Assessment of the effect of chemical contaminants on behaviours ... -
Assessing rangeland condition in the Kalahari Duneveld through local ecological knowledge of livestock farmers and remotely sensed data
(Elsevier, 2015)Monitoring of land degradation in remote rangelands, such as the Kalahari Duneveld, presents significant logistical challenges because of the need for systematic measurements of rangeland condition over time and space. ... -
Assessing the application of the water institution in the Wonderfonteinspruit catchment South Africa
(Kamla-Raj, 2016)This paper reviews the water institution: legal framework, water policy and administration, in South Africa with particular reference to the mining areas drained by the Wonderfonteinspruit River. The main aim was to examine ... -
Assessing the DNA methylation status of single cells with the comet assay
(Elsevier, 2010)The comet assay (single cell gel electrophoresis) is a cost-effective, sensitive, and simple technique that is traditionally used for analyzing and quantifying DNA damage in individual cells. The aim of this study was to ... -
Assessing the ecosystem support function of South African coal mining soil environments using earthworm (Eisenia andrei) bioassays
(Elsevier, 2021)Anthropogenic disturbances of soil environments predispose loss of soil ecosystem functions, including its habitat support function. In this study, the potential ecosystem support and habitat functions of soils from ... -
Assessing the ecotoxicity of gold mine tailings utilizing earthworm and microbial assays
(Springer, 2015)Problems associated with mining are the disposal of wastes on tailing disposal facilities (TDFs). The aim of this study was to determine the ecotoxicity of gold mine tailings by using earthworm bioassays, earthworm biomarkers ... -
Assessing the impact of Eskom power plant emissions on ambient air quality over KwaZamokuhle
(National Association for Clean Air, 2019)Coal-fired power plants are considered a major source of criteria air pollutants. The existence of such activities close to densely populated areas has an impact on human health and more generally on the environment. The ... -
Assessing the likelihood of gene flow from sugarcane (Saccharum Hybrids) to wild relatives in South Africa
(Frontiers Media, 2018)Pre-commercialization studies on environmental biosafety of genetically modified (GM) crops are necessary to evaluate the potential for sexual hybridization with related plant species that occur in the release area. The ... -
Assessing the mycotoxicological risk from consumption of complementary foods by infants and young children in Nigeria
(Elsevier, 2018)This study assessed, for the first time, the mycotoxicological risks from consumption of complementary foods by infants and young children in Nigeria. Molds belonging to Aspergillus aculeatinus, A. flavus, A. luchuensis, ... -
Assessment of a statistical approach that facilitates the constraint of pulsar geometry via dualband light curve fitting
(Sissa Medialab, 2017)The Large Area Telescope aboard the Fermi spacecraft has detected more than 200 γ-ray pulsars since its launch in 2008. By concurrently fitting standard geometric model light curves onto Fermi and radio data, researchers ... -
An assessment of applicability of existing approaches to predicting the bioaccumulation of conventional substances in nanomaterials
(Setac, 2018)The experimental determination of bioaccumulation is challenging, and a number of approaches have been developed for its prediction. It is important to assess the applicability of these predictive approaches to nanomaterials ... -
Assessment of arbuscular mycorrhizal fungal spore density and viability in soil stockpiles of South African opencast coal mines
(Taylor & Francis, 2019)The symbioses between arbuscular mycorrhizal (AM) fungi and plant roots is essential for nutrient uptake and growth of most vascular plants. Soil condition and management influence the density and viability of arbuscular ... -
Assessment of atmospheric trace metals in the western Bushveld Igneous Complex, South Africa
(ASSAf, 2014)Trace metal species emitted into the atmosphere from natural and anthropogenic sources can cause various health-related and environmental problems. Limited data exist for atmospheric trace metal concentrations in South ...