Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1821-1840 of 4825
-
First report of perfluoroalkyl substances in South African Odonata
(Elsevier, 2017)Perfluorinated substances are global and ubiquitous pollutants. However, very little is known about these substances in invertebrates, and even less in terrestrial invertebrates in particular. We analysed adult male ... -
First report of the concentrations and implications of DDT residues in chicken eggs from a malaria–controlled area
(Elsevier, 2015)In malaria-endemic areas, where DDT is still used for vector control by indoor residual spraying (IRS), the concentrations of DDT in human blood and breast milk are high, and there are indications of human health impacts. ... -
First report on OH-PAHs in South African Clarias gariepinus bile from an urban impacted system
(NISC, 2018)The concentrations of selected hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) were determined in the bile of the African sharptooth catfish Clarias gariepinus from impoundments in the urban impacted Klip River ... -
The Fischer-Clifford matrices and character table of the split extension 26:S8
(Hacettepe Univ, 2014) -
Fischer-Clifford matrices of the generalized symmetric group - (a computational approach)
(Taylor & Francis, 2017)Let be the cyclic group of order m and N be the direct product of n copies of . Let Sn be the symmetric group of degree n. The wreath product of with Sn is a split extension of N by Sn, called the generalized symmetric ... -
The Fischer–Clifford matrices and character table of the split extension 2⁶:S₈
(2014)The sporadic simple group Fi₂₂ is generated by a conjugacy class D of 3510 Fischer's 3-transpositions. In Fi₂₂ there are 14 classes of maximal subgroups up to conjugacy as listed in the ATLAS [10] and Wilson [31]. ... -
Fish and macroinvertebrate community composition of a floodplain wetland associated with the Harts River, South Africa, in relation to water quality and habitat parameters
(Natl Inquiry Services Centre Pty Ltd, 2015)The Harts River and its associated floodplain, Northern Cape province, South Africa, are closely associated with the Vaalharts Irrigation Scheme. This floodplain has been poorly studied in the past, with no published ... -
Fish consumption from urban impoundments: what are the health risks associated with DDTs and other organochlorine pesticides in fish to township residents of a major inland city
(Elsevier, 2018)Organochlorine pesticides (OCPs) in South Africa have for the most part been banned, except dichlorodiphenyltrichloroethane (DDT) which is still used as malaria vector control. The aim of this study was to determine OCP ... -
Fish-parasitic gnathiid isopods metamorphose following invertebrate-derived meal
(ASP, 2019)Organisms with a parasitic lifestyle comprise a high proportion of biodiversity in aquatic and terrestrial environments. However, there is considerable variation in the ways in which they acquire nutrients. Hematophagy is ... -
A Fisk-Parker hybrid heliospheric magnetic field with a solar-cycle dependence
(IOP Publishing, 2008)We present a refinement of the Fisk-Parker hybrid field of Burger and Hitge which now includes a region bordering the solar rotational equator where magnetic field footpoint motion occurs only through diffusive reconnection. ... -
A fixed point theorem in non-Archimedean asymmetric normed linear spaces
(House Book Science-casa Cartii Stiinta, 2015)Jointly with H.-P. K¨unzi we started investigating a concept of spherical completeness in ultra-quasipseudometric spaces which we called q-spherical completeness. In this article we study fixed point theorems in a space ... -
Fixed point theorems in T0-ultra-quasi-metric spaces
(Yokohama Publishers, 2016) -
Flagging potential fraudulent investment activity
(Emerald, 2016)Purpose: This paper aims to investigate the use of the bias ratio as a possible early indicator of financial fraud - specifically in the reporting of hedge fund returns. In the wake of the 2008-2009 financial crisis, ... -
The flight activity of Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) and Teretrius nigrescens Lewis (Coleoptera: Histeridae) in Kenya
(Elsevier, 2011)The invasive storage pest, the larger grain borer (LGB) Prostephanus truncatus (Horn), was introduced into the maize-deficit, semi-arid areas of the eastern region in Kenya in the early 1980s. In spite of containment efforts ... -
Flight activity of the groundnut leafminer (Aproaerema modicella Deventer) (Lepidoptera: Gelechiidae) in the groundnut production areas of South Africa
(Taylor & Francis, 2011)The groundnut leafminer (GLM), Aproaerema modicella (Deventer) is a pest of groundnut and soybean and also attacks lucerne. No information exists on the flight patterns of this invasive species that established in the ... -
The flip-or-flop boutique: marine debris on the shores of St Brandon's rock, an isolated tropical atoll in the Indian Ocean
(Elsevier, 2016)Isolated coral atolls are not immune from marine debris accumulation. We identified Southeast Asia, the Indian sub-continent, and the countries on the Arabian Sea as most probable source areas of 50 000 items on the shores ... -
Floristic analysis of domestic gardens in the Tlokwe City Municipality, South Africa
(South African National Biodiversity Institute, 2011) -
Floristic analysis of semi-arid mountain ecosystems of the Griqualand West centre of plant endemism, Northern Cape, South Africa
(Society for Indonesian Biodiversity, 2020)The Griqualand West Centre (GWC) is one of 13 centres of plant endemism in South Africa. Despite its unique flora, it remains poorly conserved and studied. A recent study identified an extensive geographical core area for ... -
Fluid-assisted granulite metamorphism: a continental journey
(Elsevier, 2012)Lower crustal granulites, which constitute the base of all continents, belong to two series: high-pressure granulites generated by crustal thickening (subduction) and (ultra)high-temperature granulites associated with ... -
Fluid-rock interaction during high-grade metamorphism: Instructive examples from the Southern Marginal Zone of the Limpopo Complex, South Africa
(Elsevier, 2014)The Southern Marginal Zone of the Limpopo Complex documents strong evidence that CO2-rich (View the MathML sourceXCO2fluid=0.7–0.9, View the MathML sourceXH2Ofluid=0.1–0.3) and brine fluids of greatly reduced water activity ...