Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 406-425 of 4825
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Beneficial nematodes as bioindicators of ecosystem health in irrigated soils
(Elsevier, 2018)Irrigated crop production, which accounts for 40% of global produce, is threatened by the deterioration of freshwater resources as a result of pollution originating from anthropogenic activities. While the effects of ... -
The benefits of segmentation: evidence from a South African bank and other studies
(ASSAf, 2017)We applied different modelling techniques to six data sets from different disciplines in the industry, on which predictive models can be developed, to demonstrate the benefit of segmentation in linear predictive modelling. ... -
Benjamin–Bona–Mahony equation with variable coefficients:conservation laws
(MDPI, 2014)This paper aims to construct conservation laws for a Benjamin–Bona–Mahony equation with variable coefficients, which is a third-order partial differential equation. This equation does not have a Lagrangian and so we transform ... -
Bernstein estimation for a copula derivative with application to conditional distribution and regression functionals
(Springer, 2016)Bernstein estimators attracted considerable attention as smooth nonparametric estimators for distribution functions, densities, copulas and copula densities. The present paper adds a parallel result for the first-order ... -
Best practice principles for business incubators: a comparison between South Africa and the Netherlands
(ASERS Publishing, 2016)Many researchers and industry leaders have identified business incubators as an alternative method to develop entrepreneurship and support small businesses. Incubators facilitate the success of a large number of start-ups ... -
Beta diversity of urban floras among European and non-European cities
(Wiley, 2014)Aim Cities represent an ideal study system for assessing how intensive land-use change and biotic interchange have altered beta diversity at broad geographic extents. Here we test the hypothesis that floras in cities ... -
Beyond names: developing a names database and other applications for diatoms
(International Phycological Society, 2017)Names are an important reference for all aspects of Biology, Paleontology, Medicine and many other applications. Nomenclatural databases have been developed to document and identify names that have already been established, ... -
The Bezout-Corona problem revisited: Wiener space setting
(Springer, 2016)The matrix-valued Bezout-corona problem G(z)X(z)=Im, |z|<1, is studied in a Wiener space setting, that is, the given function G is an analytic matrix function on the unit disc whose Taylor coefficients are absolutely ... -
The Bézout equation on the right half-plane in a Wiener space setting
(Springer, 2017)This paper deals with the Bézout equation G(s)X(s)=Im,Rs≤0, in the Wiener space of analytic matrix-valued functions on the right halfplane. In particular, G is an m × p matrix-valued analytic Wiener function, where p ≥ m, ... -
Bias and variance reduction procedures in non-parametric regression
(SASA, 2016)The purpose of this study is to determine the effect of three improvement methods on nonparametric kernel regression estimators. The improvement methods are applied to the Nadaraya-Watson estimator with cross-validation ... -
Bias corrections of global models for regional climate simulations of high-impact weather
(Springer, 2014)All global circulation models (GCMs) suffer from some form of bias, which when used as boundary conditions for regional climate models may impact the simulations, perhaps severely. Here we present a bias correction method ... -
Biases during DNA extraction affect bacterial and archaeal community profile of anaerobic digestion samples
(Springer, 2017)The anaerobic digestion (AD) of organic waste for biogas production has received much attention in recent years due to the increasing need for renewable energy and environmentally friendly waste management systems. ... -
A bimodal pollination system enhances reproductive potential of translocated populations of an endangered grassland succulent
(AOSIS, 2019)A major concern during the translocation of higher plant species is related to habitat suitability and the availability of pollination services. Should these not meet the requirements of the plant, then successful reproduction ... -
Binary Darboux transformation for the coupled Sasa-Satsuma equations
(AIP Publishing, 2017)The binary Darboux transformation method is applied to the coupled Sasa-Satsuma equations, which can be used to describe the propagation dynamics of femtosecond vector solitons in the birefringent fibers with third-order ... -
Bio-oil production from sweet sorghum bagasse via liquefaction using alkaline solutions and identification of phenolic products
(Springer, 2020)The feasibility of converting biomass into bio-oil and the effect of an alkaline treatment during biomass liquefaction was studied. Sweet sorghum bagasse (SSB) was treated with NaOH concentrations of 0.5, 1.0, 3.0 and 6.0 ... -
Bioaccessibility and risk assessment of essential and non-essential elements in vegetables commonly consumed in Swaziland
(Elsevier, 2017)The green leafy vegetables (Mormodica involucrate, Bidens pilosa and Amaranthus spinosus) are economic; seasonal; locally grown and easily available; easy to propagate and store; highly nutritious food substances that form ... -
Bioaccumulation and human health risk assessment of DDT and other organochlorine pesticides in an apex aquatic predator from a premier conservation area
(Elsevier, 2016)With the second highest gross domestic product in Africa, South Africa is known to have a high pesticide usage, including the highly persistent and banned group of organochlorine pesticides (OCPs). South Africa is also one ... -
Bioaccumulation and metal-associated biomarker responses in a freshwater mussel, Dreissena polymorpha, following short-term platinum exposure
(Elsevier, 2019)Due to the increasing presence of platinum (Pt) in the environment, the caveat arises to identify its toxic potential in species at risk of being exposed – especially those found in aquatic environments where pollutants ... -
Bioaccumulation and trophic transfer of total mercury in the subtropical Olifants River Basin, South Africa
(Elsevier, 2019)The present study describes total mercury (THg) levels in surface water, sediment and biota from the Olifants River Basin (ORB) (South Africa) and investigates the trophic transfer of THg by means of trophic magnification ... -
Bioaccumulation of persistent organic pollutants and their trophic transfer through the food web: human health risks to the rural communities reliant on fish from South Africa's largest floodplain
(Elsevier, 2019)The Phongolo River Floodplain (PRF) is South Africa's largest floodplain, unique in being the only large floodplain able to sustain permanent waters throughout the dry season (Kyle, 2002). This highly productive region ...