Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1117-1136 of 4825
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Development and worldwide use of non-lethal, and minimal population-level impact, protocols for the isolation of amphibian chytrid fungi
(Nature, 2018)Parasitic chytrid fungi have emerged as a significant threat to amphibian species worldwide, necessitating the development of techniques to isolate these pathogens into culture for research purposes. However, early ... -
Development in astronomy and space science in Africa
(Nature, 2018)The development of astronomy and space science in Africa has grown significantly over the past few years. These advancements make the United Nations Sustainable Development Goals more achievable, and open up the possibility ... -
The development of a Cu(I)/pyrazolylpyridineamine catalyst system for the hydroxylation of aryl halides
(Elsevier, 2020)A catalyst system comprising of pyrazolylpyridineamine/Cu(I)/CsOH is reported. for the hydroxylation of aryl iodides and bromides with moderate to outstanding yields, without the use of an inert atmosphere. A comprehensive ... -
Development of a low purity aluminum alloy (Al6082) anodization process and its application as a platinum-based catalyst in catalytic hydrogen combustion
(Elsevier, 2020)In this study, we present a process to prepare a Pt/anodized aluminum oxide (AAO) catalyst for catalytic hydrogen combustion applications using low cost and low aluminum (Al) purity Al6082 alloy (97.5% Al) as the substrate. ... -
Development of a solar desalination plant
(Geological Soc South Africa, 2016)South Africa is predominantly a water scarce country with many parts having limited access to water. Water quality is an additional stressor affecting available water supply. In the semi-arid to arid regions of the country, ... -
The development of a systems development methodology for location-based games
(ACM, 2018)Currently, there is a lack of systems development methodologies (SDMs) suitable for the development of location-based games. This research introduced a newly developed SDM to aid in the development process of location-based ... -
Development of an SNP‐based parentage verification panel for lovebirds
(Wiley, 2019)The genus Agapornis, or lovebirds, are popular pet parrots worldwide. Currently, breeders are dependent on pedigree records as a selection tool as no molecular parentage verification test is available for any of the nine ... -
Development of microporous drug-releasing films cast from artificial nanosized latexes of poly (styrebe-co-methyl methacrylate) or poly (styrene-co-ethyl methacylate)
(Elsevier, 2008)Two sets of copolymers comprising of styrene and either methyl or ethyl methacrylate as comonomer were conveniently synthesized by microemulsion copolymerization. The purified materials were characterized by GPC-MALLS and ... -
Development of real-time RT-PCR assays for detection and typing of epizootic haemorrhagic disease virus
(Wiley, 2017)Epizootic haemorrhagic disease virus (EHDV) is an emerging arboviral pathogen of wild and domestic ruminants worldwide. It is closely related to bluetongue virus (BTV) and is transmitted by adult females of competent ... -
The development, validation and standardisation of a questionnaire for ICT professional development of mathematics teachers
(AOSIS, 2015)This article reports on the development of a custom-made questionnaire. The questionnaire was developed with the aim to compile guidelines for the professional development (PD) of mathematics teachers for the pedagogical ... -
A DFT computational study of phosphine ligand dissociation versus hemilability in a Grubbs-type precatalyst containing a bidentate ligand during alkene metathesis
(Taylor & Francis, 2008)Using density functional theory, the metathesis reaction of 1-octene in the presence of a Grubbs-type ruthenium alkylidene complex bearing a chelating pyridinyl alcoholate ligand, [RuCl(L)(O∧ N)( = CHPh)] (L = H2IMes or ... -
DFT investigation of the 1-octene metathesis reaction mechanism with the Phobcat precatalyst
(Springer, 2009)The productive self-metathesis reaction of 1-octene in the presence of the Phobcat precatalyst [RuCl2(Phoban-Cy)2(=CHPh)] using density functional theory was investigated and compared to the Grubbs 1 precatalyst ... -
DFT modelling of tantalum pentafluoride extraction with phosphorus-based extractants – a molecular dynamics study
(Elsevier, 2019)Solvent extraction (SX) is a powerful method for both the separation and extraction of metals, resulting in high purity metals. The transition metals tantalum (Ta) and niobium (Nb) are of considerable significance, for ... -
DFT–based QSAR Study of Substituted Pyridine–Pyrazole Derivatives as Corrosion inhibitors in Molar Hydrochloric Acid
(ESG, 2014)Quantum chemical calculations, based on DFT methods at B3LYP/6-31G** level of theory, were performed, by means of the G03 set of programs, on four pyridine-pyrazole compounds. The objective of this work was ... -
Diagnosing emerging fungal threats: a one health perspective
(Frontiers Media, 2018)Emerging fungal pathogens are a growing threat to global health, ecosystems, food security, and the world economy. Over the last century, environmental change and globalized transport, twinned with the increasing application ... -
Diagnosing relativistic particle acceleration in AGN jets
(AIP, 2017)Mildly relativistic, oblique shocks are generally considered to be among the most plausible sites of relativistic particle acceleration and the subsequent production of strongly variable, polarized multi-wavelength emission ... -
A diagnostic biomarker profile for fibromyalgia syndrome based on an NMR metabolomics study of selected patients and controls
(BioMed Central, 2017)Background: Fibromyalgia syndrome (FMS) is a chronic pain syndrome. A plausible pathogenesis of the disease is uncertain and the pursuit of measurable biomarkers for objective identification of affected individuals is a ... -
Diagnostic DIVA tests accompanying the Disabled Infectious Single Animal (DISA) vaccine platform for African horse sickness
(Elsevier, 2018)African Horse Sickness Virus (AHSV) (Orbivirus genus, Reoviridae family) causes high mortality in naïve domestic horses with enormous economic and socio-emotional impact. There are nine AHSV serotypes showing limited cross ... -
Diagnostic tests for the distribution of random effects in multivariate mixed effects model
(Taylor & Francis, 2016)Fourier methods are proposed for testing the distribution of random effects in classical and robust multivariate mixed effects models. The test statistics involve estimation of the characteristic function of random effects. ... -
Diamond formation by carbon saturation in C–O–H fluids during cold subduction of oceanic lithosphere
(Elsevier, 2014)Microdiamonds in garnet of graphite-free ultrahigh pressure metamorphic (UHPM) rocks from Lago di Cignana (western Alps, Italy) represent the first occurrence of diamond in a low-temperature subduction complex of oceanic ...