Search
Now showing items 11-20 of 1518
Investigation into the occurrence of the dinoflagellate, Ceratium hirundinella in source waters and the impact thereof on drinking water purification
(North-West University, 2011)
The Ceratium species occurring in the Vaal River since 2000, was identified as Ceratium hirundinella (O.F. Müller) Dujardin as proposed by Van Ginkel et al (2001). Ceratium hirundinella is known to cause problems in drinking ...
Status of resistance of Helicoverpa armigera (Lepidoptera: Noctuidae) and Diparopsis castanea (Lepidoptera: Noctuidae) to Bt cotton in South Africa
(North-West University, 2011)
Genetically modified (GM) cotton expressing Cry1Ac proteins was released in South Africa in 1997 for control of the bollworm complex on this crop. No reports of the failure of Bollgard® cotton to control these pests have ...
Evaluation of a ceramic membrane bioreactor functioning under non-steady state operational parameters for the removal of pollutants from municipal wastewater plant effluent
(North-West University (South Africa), 2011)
In South Africa ill-managed municipal wastewater treatment plants limit the quality and quantity of already exploited surface water resources. Elevated nitrate levels cause eutrophication and chemicals (measured as chemical ...
The association between physical activity, blood pressure and renin in black African teachers : the SABPA study
(North-West University, 2011)
Objectives: The aim of this study was to determine associations between physical activity (PA), blood pressure (BP) and renin in urban black Africans. Methods: The study sample included 137 urban African males (N=68) and ...
Ferrochrome waste management : addressing current gaps
(North-West University (South Africa), Potchefstroom Campus, 2018)
Various chromium (Cr) compounds, Cr metal and/or Cr-containing alloys are used in modern
society. By volume the largest application for Cr is in the production of stainless steel, which
owes its corrosion resistance ...
Determining the ecotoxicity of nanodiamonds and quantum dots using the soil nematode Caenorhabditis elegans
(North-West University (South Africa), 2018)
Engineered nanoparticles (ENP) are being used in many commercial products and applications, such as biological imaging, toothpaste and electronics. As the production, use and disposal of these products increase, environmental ...
Atmospheric deposition of sulphur and nitrogen over Eastern South Africa
(North-West University (South Africa), 2019)
Adverse effects of acid deposition ascribed to increased atmospheric emission rates of acid-forming pollutants on terrestrial and aquatic ecosystems are a global concern. This is largely accorded to the emission of sulphur ...
Unique challenges of clay binders in a pelletised chromite pre–reduction process : a case study
(North-West University, 2011)
As a result of increasing cost, efficiency and environmental pressures ferrochrome producers strive towards lower overall energy consumption. Increases in local electricity prices have placed particular pressure on South ...
Bioprospecting for cellulase enzymes of Soil-Borne Bacteria for possible application into Bioethanol production
(North-West University (South Africa), 2016)
Rising crude oil prices and strict emission standards have prompted a global demand for alternative fuels that are able to reduce the consumption of fossil resources, improve energy security and mitigate climate change. ...
Plant and arthropod diversity of maize agro–ecosystems in the Highveld and Lowveld regions of South Africa
(North-West University, 2011)
Surveys of plant and selected insect species was conducted in Highveld and Lowveld
agro–ecosystems of four provinces of South Africa, namely North–West, Mpumalanga,
KwaZulu–Natal and Limpopo. The objectives of the study ...