Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 782-801 of 4818
-
Complexities with extractive industries regulation on the African continent: what has ‘best practice’ legislation delivered in South Africa?
(Elsevier, 2017)The legal framework for mine closure and rehabilitation of new and former mine sites in South Africa, including legacy abandoned sites, is comprehensive. This paper discusses legislative provisions for mine site rehabilitation ... -
Complexiton solutions to soliton equations by the Hirota method
(AIP Publishing, 2017)We apply the Hirota direct method to construct complexiton solutions (complexitons). The key is to use Hirota bilinear forms. We prove that taking pairs of conjugate wave variables in the 2N-soliton solutions generates ... -
The composition of ambient and fresh biomass burning aerosols at a savannah site, South Africa
(ASSAf, 2016)Atmospheric aerosols play a key role in climate change, and have adverse effects on human health. Given South Africa’s status as a rapidly-developing country with increasing urbanisation and industrial growth, information ... -
Compositional turnover in ecto- and endoparasite assemblages of an African bat, Miniopterus natalensis (Chiroptera, Miniopteridae): effects of hierarchical scale and host sex
(Cambridge Univ Press, 2020)We studied the compositional turnover in infracommunities and component communities of ecto- and endoparasites infesting a bat, Miniopterus natalensis (Chiroptera, Miniopteridae), across seven sampling sites using the zeta ... -
Compound maximal motor unit response is modulated by contraction intensity, but not contraction type in tibialis anterior
(Wiley, 2019)Determining a single compound maximal motor response (MMAX) or an average superimposed MMAX response (MSUP) are commonly used reference values in experiments eliciting raw electromyographic, motor evoked potentials, ... -
A comprehensive power spectral density analysis of astronomical time series. I. The Fermi-LAT gamma-ray light curves of selected blazars
(IOP Publishing, 2020)We present the results of the Fermi-Large Area Telescope 10 yr long light curve (LC) modeling of selected blazars: six flat-spectrum radio quasars (FSRQs) and five BL Lacertae (BL Lacs), examined in 7, 10, and 14 day ... -
Compression garments and recovery from exercise-induced muscle damage: a meta-analysis
(BMJ Publishing Group, 2014)The purpose of the study was to determine the effects of compression garments on recovery following damaging exercise. A systematic review and meta-analysis was conducted using studies that evaluated the efficacy of ... -
Compression garments and recovery from exercise: a meta-analysis
(Springer, 2017)Background Adequate recovery from exercise is essential to maintain performance throughout training and competition. While compression garments (CG) have been demonstrated to accelerate recovery, the literature is clouded ... -
Computational chemistry study of zirconium monomers in low acid concentration aqueous solutions
(IOP Publishing, 2018)Zirconium and hafnium have to be separated prior to their use in nuclear energy reactors. Therefore, a lot of research has been done on the solvent extraction of zirconium. However, most of this research involved screening ... -
Computational method based on bernstein operational matrices for multi-order fractional differential equations
(Univ Nis, 2014)In this paper, the Bernstein operational matrices are used to obtain solutions of multi-order fractional differential equations. In this regard we present a theorem which can reduce the nonlinear fractional differential ... -
Computational method for non-linear singular boundary value problems
(SASIP, 2017)This paper presents a new numerical approach based on the Chebyshev polynomials of the first kind for solving a class of nonlinear singular boundary value problems arising in physiology. We apply the quasilinearization ... -
Computational methods for the determination of roundness of sedimentary particles
(Springer, 2006)A number of subjective and objective methods have been proposed to determine the roundness of rock particles, roundness being one of three properties describing the shape of a particle. Methods that make use of the Fourier ... -
Computational modelling and optimal control of Ebola virus disease with non-linear incidence rate
(IOP Publishing, 2017)The 2014 Ebola outbreak in West Africa has exposed the need to connect modellers and those with relevant data as pivotal to better understanding of how the disease spreads and quantifying the effects of possible interventions. ... -
A computational probe into the dissolution inhibitation effect of diazonaphthoquinone photoactive compounds on positive tone photosensitive polyimides
(ACS, 2017)Positive tone photosensitive polyimides ( p -PSPIs) composed of poly(amic acid) (PAA) and a diazonaph- thoquinone photoactive compound (DNQ PAC) have been greatly contributed to the progress of microelectronics. ... -
A computational study of pyrazinamide: tautomerism, acid–base properties, micro–solvation effects and acid hydrolysis mechanism
(Elsevier, 2014)Pyrazinamide (PZA) is a prodrug substance utilised in the treatment of tuberculosis related to mycobacterium strains. The activities of this compound are said to occur in acidic medium where it is converted to the active ... -
Concentrations and human health risk assessment of DDT and its metabolites in free-range and commercial chicken products from KwaZulu-Natal, South Africa
(Taylor & Francis, 2017)Organochlorine pesticides such as dichlorodiphenyltrichloroethane (DDT) have been used in agriculture and for disease control purposes over many decades. Reports suggest that DDT exposure may result in a number of adverse ... -
Concentrations and relative compositions of metallic elements differ between predatory squid and filter-feeding sardine from the Indian and South Atlantic oceans
(Elsevier, 2020)Although metallic elements occur naturally, they can occur or accumulate in organisms at levels toxic to the organism and/or their consumers. Concentrations of twenty-nine metallic elements in muscle tissue from sardine ... -
Concentrations of metallic elements in kidney, liver, and lung tissue of Indo-Pacific bottlenose dolphin Tursiops aduncus from coastal waters of Zanzibar, Tanzania
(Elsevier, 2017)Concentrations of metallic elements in kidney, liver and lung tissues of Indo-Pacific bottlenose dolphins Tursiops aduncus from coastal waters of Zanzibar were determined using inductively coupled plasma – optical emission ... -
Concentrations, distributions and critical level exceedance assessment of SO2, NO2 and O3 in South Africa
(Springer, 2010)South Africa has been identified as a source of industrial pollution that is significant at a global scale. This study was designed to provide quantitative information, by direct measurement, across northeastern South ... -
Concept analysis of collaboration in implementing problem-based learning in nursing education
(AOSIS, 2016)Objectives: The purpose of this concept analysis was to better understand and define collaboration as it relates to the implementation of problem-based learning (PBL). Methods: The process of concept analysis was conducted ...