Browsing by Author "Jansen van Rensburg, P.J."
Now showing items 1-15 of 15
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Assessment and monitoring of rehabilitation efforts by analysis of soil microbial communities as biological indicators of sustainability
Liebenberg, Leon (North-West University, 2005)The disposal of solid waste material produced by mining activities can have vastly negative environmental impacts with regards to soil ecosystems. Global and South African legislation requires the mining company to ... -
The assessment of soil microbial and plant physiological changes during the treatment of soil containing bromacil, tebuthiuron and ethidimuron
De Beer, Misha (North-West University, 2005)Increased amounts of pesticide production and application of pesticides for agriculture, plant protection and animal health has resulted in soil, water and air pollution, consequently relating a serious risk to the ... -
Earthworm (Eisenia Fetida) bioassay to assess the possible effects of platinum tailings disposal facilities on the environment along a gradient
Maboeta, M.S.; Van Rensburg, L.; Jansen van Rensburg, P.J. (ALÖKI Applied Ecological Research and Forensic Institute Ltd., 2008)Platinum mines produce large amounts of inorganic tailings containing high levels of metals which are disposed of on tailings disposal facilities (TDFs) and there is no information available on their possible effects on ... -
Elucidating the dual physiological induced effect of gliotoxin on plants
Bezuidenhout, Johannes Jacobus (North-West University, 2011)Fungi and Oomycetes represent the two most important groups of eukaryotic plant pathogens. Besides chemical and physical control of these pathogens, biological control is an approach enjoying increasingly more focus. One ... -
Evaluation of fluidised-bed reactors for the biological treatment of synthol reaction water, a high-strength COD petrochemical effluent
Swabey, Katharine Gaenor Aske (North-West University, 2004)Reaction water, a high-strength COD (chemical oxygen demand) petrochemical effluent, is generated during the Fischer-Tropsch reaction in the SASOL Synthol process at SASOL SynFuels, Secunda, South Africa. Distillation of ... -
Evaluation of the suitabil[i]ty of Fischer-Tropsch gas-to-liquid (GTL) Primary Column Bottoms as process cooling water : analysis of microbial community dynamics, fouling, scaling and corrosion
Slabbert, Savia Susanna (North-West University, 2007)Water in South Africa is becoming limiting due to economic growth, social development and the country's water demand that exceed its water availability. Water conservation in the industry can be accomplished by the reuse ... -
Functional and structural diversity of the microbial communities associated with the use of Fischer–Tropsch GTL Primary Column Bottoms as process cooling water
Van Niekerk, Bertina Freda (North-West University, 2011)Despite emerging water shortages, most water is only used once, and often with low efficiency. However, with appropriate treatment, water can be re–used to reduce the demand on freshwater sources. The Department of Water ... -
Implementing an LC-QQQ method for the quantification of vitamin D analogues from serum accounting for epimers and isobars
Van der Westhuizen, Jacobus Cornelius (2014)In the early 19th century a ground-breaking discovery was made that linked a dietary deficiency of a fat-soluble vitamin with the childhood disease known as rickets. The vitamin was named vitamin D and extensive research ... -
Metabolite profiling of Bacillus species with nematicidal activity
Engelbrecht, Gerhard (North-West University (South Africa). Potchefstroom Campus, 2019)Root-knot nematodes continue to be a global problem in agriculture causing major economic losses. Various Bacillus spp. have the potential to inhibit the Meloidogyne root-knot nematode populations. Although many studies ... -
Rehabilitation of asbestos mining waste: a rehabilitation prioritisation index (RPI) for South Africa
Van Rensburg, L.; Claassens, S.; Bezuidenhout, J.J.; Jansen van Rensburg, P.J. (Springer, 2008)The much publicised problem with major asbestos pollution and related health issues in South Africa, has called for action to be taken to negate the situation. The aim of this project was to establish a prioritisation index ... -
Soil microbial community function and structure as assessment criteria for the rehabilitation of coal discard sites in South Africa
Claassens, Sarina (North-West University, 2003)Mining activities cause severe disturbance to the soil environment in terms of soil quality and productivity and are of serious concern worldwide. Under South African legislation, developers are required to ecologically ... -
Soil microbial community function and structure in a post-mining chronosequence
Claassens, S.; Jansen van Rensburg, P.J.; Maboeta, M.S..; Van Rensburg, L. (Springer, 2008)Temporal changes in microbial community function (enzymatic activities) and structure (phospholipid fatty acids) were studied in a post-mining chronosequence of coal discard sites of different rehabilitation ages. The ... -
Soilborne disease suppressiveness / conduciveness : analysis of microbial community dynamics
Habig, Johannes Hendrikus (North-West University, 2003)Take-all is the name given to the disease caused by a soilborne fungus Gaeumannomyces graminis (Sacc.) von Arx and Olivier var. tritici Walker (Ggt), an ascomycete of the family Magnaportheaceae (Cook, 2003). This fungus ... -
Stripped gas liquor (SGL) as process cooling water: analysis of the effects of operational conditions on microbial community dynamics, fouling, scaling and corrosion
Gubuza, D.M.; Riedel, K.J.; Jansen van Rensburg, P.J.; Bezuidenhout, C.C. (Elsevier, 2008)More than 30 million tons per annum of coal are gasified at the various Sasol plants in South Africa via the Fischer–Tropsch process. This process results in the production of synthesis gas and a condensate stream (van Dyk ... -
The use of different ecosystem components as indicators of ecosystem development during platinum mine tailings rehabilitation
Rossouw, Johanna Martina (North-West University, 2005)Platinum mining activities contribute substantially to South Africa's economy since it exceeded gold as economical contributor in 2001. Mining activities contribute to large amounts of waste production in the form of ...