Browsing Faculty of Natural and Agricultural Sciences by Subject "Minerals"
Now showing items 1-7 of 7
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Comparison of sintering and compressive strength tendencies of a model coal mineral mixture heat-treated in inert and oxidizing atmospheres
(Elsevier, 2011)The chemical interactions responsible for sintering in a coal mineral mixture were investigated in air and in N2. A mineral mixture was made up by mixing kaolin, pyrite, quartz, calcite, hydromagnesite, FeCO3 and anatase ... -
Effect of cultivar, nitrogen application rate and stage of harvesting on yield and nutritive value of perennial ryegrass (Lolium perenne L.)
(Range Management Society of India, 2016)This experiment consisted of a factorial combination of seven perennial ryegrass cultivars, two levels of nitrogen fertilizer (30 and 60 kg ha?1), and three harvesting stages (60, 75 and 90 days after planting; DAP) and ... -
Effect of sodium compounds on the sintering propensity of coal-associated minerals
(Elsevier, 2015)This study focused on the chemistry involved in sintering of coal-associated minerals during combustion and inert conditions. Changes in mechanical strength were recorded with compressive strength measurements. This method ... -
Is the Extractive Industry Transparency Initiative (EITI) sufficient to generate transparency in environmental impact and legacy risks? The Zambian minerals sector
(Elsevier, 2016)Developing administrative and financial mechanisms to achieve transparency and compliance with legal frameworks related to mine operation and closure is a major challenge. Ensuring the appropriate level of disclosure, ... -
Minerals, trace elements and antioxidant phytochemicals in wild African dark-green leafy vegetables (morogo)
(ASSAf, 2009)Wild African dark-green leafy vegetables (morogo) are an important constituent of the traditional starch-based African diet. Three wild morogo types were sampled from different geographical regions in South Africa to ... -
The possible association between selected sediment characteristics and the occurrence of benthic macroinvertebrates in a minimally affected river in South Africa
(Taylor & Francis, 2017)Forty-two families of which the vast majority associated with particles >2000 µm were found. Sediment particle sizes <2000 µm had a detrimental effect on biodiversity. The highest biodiversity was recorded at sites ... -
RAPD profiling of Bacillus spp with PGPR potential and their effects on mineral composition of tomatoes
(Kamla-Raj, 2016)Bacillus species have been known to antagonize and inhibit the growth of various plant pathogens but quality of crop from such plants is yet to be investigated. The aim of this study is to analyze the mineral composition ...