Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 307-326 of 4818
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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 ... -
Assessment of changes in photosystem II structure and function as affected by water deficit in Amaranthus hypochondriacus L. and Amaranthus hybridus L
(Elsevier, 2011)The present study describes the behaviour of photosystem II (PSII) in Amaranthus hypochondriacus and Amaranthus hybridus under water stress conditions, assessed by the analyses of the polyphasic rise in chlorophyll a ... -
Assessment of DDT contamination in house rat as a possible bioindicator in DDT-sprayed areas from Ethiopia and South Africa
(Springer, 2017)Ethiopia and South Africa are among the few countries to still implement indoor residual spraying with dichloro-diphenyl-trichloroethane (DDT) for malaria vector control. In this study, we investigated the levels and ... -
Assessment of land use change in Likangala River catchment, Malawi: a remote sensing and DPSIR approach
(Elsevier, 2016)The provisioning ecosystem services of Likangala River catchment located in Southern Malawi provides food, construction materials, fuel-wood, timber, ornamental products and water for its inhabitants. However, poor land ... -
Assessment of Malawian mothers’ Malaria knowledge, healthcare preferences and timeliness of seeking fever treatments for children under five
(MDPI, 2015)Malaria is one of the major public health problems in Malawi, contributing to the majority of morbidity and mortality among children under five. Ignorance of malaria symptoms results in delayed treatment, which often ... -
An assessment of mercury contamination and the relationship between environmental variables and mercury concentrations in a seasonal wetland
(Springer Verlag, 2013)A study was undertaken to assess the extent of mercury contamination in the water and sediment in a seasonal wetland, as well as to determine the relationship between environmental parameters and the distribution of ... -
The assessment of neuromuscular fatigue during 120 min of simulated soccer exercise
(Springer, 2017)Purpose This investigation examined the development of neuromuscular fatigue during a simulated soccer match incorporating a period of extra time (ET) and the reliability of these responses on repeated test occasions. ...