Browsing Research Output by Title
Now showing items 7621-7640 of 13384
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Metagenomics reveals bacterial and archaeal adaptation to urban land-use: n catabolism, methanogenesis, and nutrient acquisition
(Frontiers Media, 2019)Urbanization results in the systemic conversion of land-use, driving habitat and biodiversity loss. The “urban convergence hypothesis” posits that urbanization represents a merging of habitat characteristics, in turn driving ... -
Metakognitiewe bewustheid, selfgerigtheid in leer en een leerprestasie van voornemende wiskundeonderwysers vir die intermediêre en senior fase
(AOSIS, 2014)Opsomming: Daar is ’n gaping tussen die kennis en vaardighede wat leerders op skool aanleer, en die kennis en vaardighede wat in die werkplek en samelewing in die 21ste eeu nodig is. Metakognitiewe bewustheid en ... -
Metal accumulation in riverine macroinvertebrates from a platinum mining region
(Elsevier, 2020)South Africa is the world’s main supplier of Pt. The Bushveld Igneous Complex in South Africa contains 75% of the world’s Pt resources. Mining of this precious metal requires large volumes of water for production and removal ... -
Metal carbenes in homogeneous alkene metathesis: computational investigations
(Elsevier, 2013)This paper demonstrates the contribution of molecular modeling as a tool to understanding alkene metathesis e by giving an overview of computational studies done of the four main types of metal carbenes tested in homogeneous ... -
Metal concentrations in corals from South Africa and the Mascarene Basin: a first assessment for the Western Indian Ocean
(Elsevier, 2019)Little knowledge exists on the state of metal contamination in corals from the Western Indian Ocean (WIO). Fragments of four soft and five hard coral genera were collected from five sites in the WIO– Sodwana Bay and Aliwal ... -
Metal concentrations in Hydrocynus vittatus (Castelnau 1861) populations from a premier conservation area: relationships with environmental concentrations
(Elsevier, 2016)Metals are known to have deleterious effects on aquatic ecosystems, so monitoring the bioaccumulation of these pollutants is important for the assessment of potential impacts. The aim of the study was therefore to determine ... -
Metal contamination of sediments and fish from the Vaal River, South Africa
(Taylor & Francis, 2014)Mining and other economic activities have led to the pollution of the Vaal River with metals of mainly industrial origin, but the consequences of this for animal and human health are unknown. Based on chemical analysis and ... -
Metal content in street dust as a reflection of atmospheric dust emissions from coal power plants, metal smelters, and traffic
(Springer Link, 2013)Resuspended street dust is a source of inhalable particles in urban environments. Despite contaminated street dust being a possible health risk factor for local population, little is known about the contribution of ... -
Metal enrichment and contamination in a karst cave associated with anthropogenic activities in the Witwatersrand Basin, South Africa
(Springer, 2016)The Wonderfontein Spruit has been severely polluted as a result of anthropogenic activities (i.e. mining and industry) in the Witwatersrand Basin (South Africa). Although the extent of metal pollution within this surface ... -
Metal extent in blood of livestock from Dandora dumping site, Kenya: source identification of Pb exposure by stable isotope analysis
(Elsevier, 2015)Nairobi city in Kenya produces 2000 tons/day of garbage, and most of it is dumped onto the Dandora dumping site, home to a quarter-million residents. This study was conducted (1) to assess the contamination levels of nine ... -
Metal ion transport through a polystyrene-based cobalt arsenate membrane: application of irreversible thermodynamics and theory of absolute reaction rates
(Elsevier, 2012)Polystyrene-based cobalt arsenate membranes have been prepared by sol–gel method for various 1:1 electrolytes (KCl, NaCl and LiCl) at different concentrations. The conductance values of cobalt arsenate membranes have been ... -
Metal ions adsorption affinity of clayey materials from the North West Province of South Africa
(CUMTP, 2014)Local clays that are abundant in the periphery of Potchefstroom in South Africa were characterized and investigated as potential sorbents for the removal of metal ions from effluents. The clay samples mostly contained ... -
Metal nanoparticles decorated phosphorylated carbon nanotube/cyclodextrin nanosponge for trichloroethylene and Congo red dye adsorption from wastewater
(Elsevier, 2020)In this research, insoluble nanosponge β-cyclodextrin (β-CD) polyurethane was modified with phosphorylated multiwalled carbon nanotubes (pMWCNTs) and further decorated with titanium dioxide and silver nanoparticles. This ... -
Metal retention potential of sediment and water quality in the Mooi River, South Africa
(Taylor & Francis, 2017)The potential metal retention by sediments along the Mooi River and connected streams in the vicin - ity of Potchefstroom, South Africa, was evaluated using the four-stage sequential extraction proce - dure. ... -
Metal speciation in the rivers around Potchefstroom based on seasonality
(Water Environment Federation, 2018)About 44 surface water samples were collected in the wet and dry seasons around mining areas near the city of Potchefstroom in South Africa, and physicochemical parameters were analyzed to assess the speciation of pollutants ... -
Metallic elements in Nile Crocodile eggs from the Kruger National Park, South Africa
(Elsevier, 2018)The Nile Crocodile is the largest predator on the African continent. Recent mass mortalities in the Kruger National Park (KNP) raised concerns about possible influence of pollution. We analysed eggs and their eggshells ... -
Metallothionein 1 overexpression does not protect against mitochondrial disease pathology in Ndufs4 knockout mice
(Springer, 2021)Mitochondrial diseases (MD), such as Leigh syndrome (LS), present with severe neurological and muscular phenotypes in patients, but have no known cure and limited treatment options. Based on their neuroprotective effects ... -
Metallothionein induction as indicator of low level metal exposure to aquatic macroinvertebrates from a relatively unimpacted river system in South Africa
(Springer, 2017)The Marico River is relatively unaffected by anthropogenic activities. However, metal concentrations—mainly from natural sources—occasionally exceed environmental quality guidelines. Macroinvertebrates are capable to react ... -
Metaphorical Bridge-building for Promoting understanding and peaceful coexistence
(OpenJournals Publishing, 2009)After briefly sketching the tumultuous nature of life in modern societies, the author calls on the reader to imagine for him- or herself the construction of a metaphorical traffic intersection that would enable those who ... -
Metaphors in the freedom day addresses of South African presidents (1995-2012)
(UNISA Pres, 2014)Political discourse draws quite extensively on metaphor in construing a range of issues. Previous research on South African politicians has focussed mainly on the metaphor of A RAINBOW NATION, except Malan (2008) who ...