Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1345-1364 of 4818
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The effect of acid mine drainage on the hatching success of branchiopod egg banks from endorheic wetlands in South Africa
(Springer, 2014)Endorheic wetlands are abundant in South Africa, and are more commonly referred to as pans. The pan environment experiences daily and seasonal fluctuations in physico-chemical conditions, caused by variable hydroperiods. ... -
The effect of acid washing on the pyrolysis products derived from a vitrinite-rich bituminous coal
(Elsevier, 2015)Extensive characterization of the pyrolysis products, derived from raw and acid washed samples of a vitrinite-rich South African bituminous coal is reported. Pyrolysis experiments were carried out with use of a modified ... -
The effect of added minerals on the pyrolysis products derived from a vitrinite-rich demineralised South African coal
(Elsevier, 2016)A better understanding of the behaviour of the inorganic matter present in coal will assist in more cost-effective operations and more consistency in product yield and composition during thermal processing. In this study, ... -
Effect of age on production characteristics of Boschveld indigenous chickens of South Africa reared intensively
(South African Society for Animal Science (SASAS), 2017)The Boschveld indigenous chicken is a breed that was developed in South Africa for rural household free-range production of meat and eggs. A performance test was carried out to identify their production characteristics ... -
The effect of an offset polar cap dipolar magnetic field on the modeling of the Vela pulsar's γ-ray light curves
(IOP Publishing, 2016)We performed geometric pulsar light curve modeling using static, retarded vacuum, and offset polar cap (PC) dipole B-fields (the latter is characterized by a parameter epsilon), in conjunction with standard two-pole caustic ... -
The effect of an offset-dipole magnetic field on the Vela pulsar’s γ-ray light curves
(SAIP, 2015)Over the past six years, the Fermi Large Area Telescope has detected more than 150 γ-ray pulsars, discovering a variety of light curve trends and classes. Such diversity hints at distinct underlying magnetospheric and/or ... -
Effect of aqueous extracts of Mangifera indica linn. on the testes of adult male Wistar Rats
(Kamla-Raj, 2016)The use of various medicinal plants in the treatment and prevention of various ailments especially in developing countries of the world cannot be overlooked. Among these medicinal plants is Mangifera indica linn. whose ... -
Effect of award, incentives and competition on entrepreneurial development among female farmers in North-West Province, South Africa: a review
(Allied Business Academies, 2017)The terms "entrepreneur" and "entrepreneurship" are used by people interchangeably, hence the need to differentiate between an entrepreneur and an entrepreneurship. An entrepreneur is a person who starts and owns a business ... -
Effect of Bacillus cereus on the ecotoxicity of metal-based fungicide spiked soils: earthworm bioassay
(Springer, 2019)Soil microorganisms exhibit varying levels of metal tolerance across a diverse range of environmental conditions. The use of metal-based fungicides such as mancozeb and copper oxychloride could potentially result in increased ... -
Effect of bacterial inoculation of strains of pseudomonas aeruginosa, alcaligenes feacalis and bacillus subtilis on germination, growth and heavy metal (cd, cr, and ni) uptake of brassica juncea
(Taylor & Francis, 2016)Bacterial inoculation may influence Brassica juncea growth and heavy metal (Ni, Cr, and Cd) accumulation. Three metal tolerant bacterial isolates (BCr3, BCd33, and BNi11) recovered from mine tailings, identified as Pseudomonas ... -
Effect of biofumigants on soil microbial communities and ecotoxicology of earthworms (Eisenia andrei)
(Springer, 2016)Biofumigation is considered a good alternative to chemical fumigation because it can control crop pathogens and diseases with lower health and environmental risks than chemical fumigants. Glucosinolates are volatile compounds ... -
The effect of BPR on organizational strategy and the role of SDMS: a case of South Africa’s merged higher education institutions
(IBIMA, 2012)Changes in organisations due to various factors such as technological advancements or competition may bring the effect of change to certain business processes. This in turn invokes business process re-engineering (BPR) and ... -
The effect of Busseola fusca infestation, fungal inoculation and mechanical wounding on Fusarium ear rot development and fumonisin production in maize
(Elsevier, 2017)Fusarium verticillioides and Busseola fusca are among the most significant biotic constraints to maize production in South Africa. In this study, the effect of B. fusca damage and mechanical wounding to maize ears on ... -
The effect of canola (Brassica napus) as a biofumigant on soil microbial communities and plant vitality: a pot study
(Taylor & Francis and NISC, 2013)Canola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil ... -
The effect of carbonaceous reductant selection on chromite pre-reduction
(Springer, 2017)Ferrochrome (FeCr) production is an energy-intensive process. Currently, the pelletized chromite pre-reduction process, also referred to as solid-state reduction of chromite, is most likely the FeCr production process ... -
The effect of coal size on PM2.5 and PM-bound polycyclic aromatic hydrocarbon (PAH) emissions from a domestic natural cross-draft stove
(Elsevier, 2020)Residential coal combustion has played an important role in the domestic energy supply of Northern China for many decades and will do so for the foreseeable future, although it is also an important contributor to severe ... -
The effect of crystalline phase (anatase, brookite and rutile) and size on the photocatalytic activity of calcined polymorphic titanium dioxide (TiO2)
(Elsevier, 2018)The effect of thermal treatment on the morphology (crystalline phase and size) and photocatalytic activity of freshly prepared TiO2 nano-powder is communicated. TiO2 nano-powders, prepared by hydrolyzing titanium ... -
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 ... -
The effect of different host plants on development and survival of Nysius natalensis (Hemiptera: Orsillidae)
(Oxford University Press, 2015)Nysius natalensis Evans (Hemiptera: Orsillidae) is a pest of sunflower in South Africa. Adults invade sunflower fields from their weedy hosts. The host plant suitability for development and survival and the effect of ...