Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 3281-3300 of 4825
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An overview of mechanisms of Cry toxin resistance in Lepidopteran insects
(Oxford Univ Press, 2017)Arthropods have the capacity to evolve resistance to insecticides and insecticidal traits in genetically modified crops. Resistance development among Lepidoptera is a common phenomenon, and a repertoire of resistance ... -
An overview of mesoscale aerosol processes, comparisons, and validation studies from DRAGON networks
(EGU, 2018)Over the past 24 years, the AErosol RObotic NETwork (AERONET) program has provided highly accu- rate remote-sensing characterization of aerosol optical and physical properties for an increasingly extensive ... -
An overview of pedogenesis in Technosols in South Africa
(Taylor & Francis, 2018)Technosols are soils dominant in technical artifacts, formed from anthropogenic deposits or transported materials. While anthropogenic in origin, it is clear that pedogenic processes are active within Technosols, i.e. ... -
An overview of regional and local characteristics of aerosols in South Africa using satellite, ground, and modeling data
(European Geosciences Union, 2015)We present a comprehensive overview of particulate air quality across the five major metropolitan areas of South Africa (Cape Town, Bloemfontein, Johannesburg and Tshwane (Gauteng Province), the Industrial Highveld Air ... -
An overview of the Dactylosomatidae (Apicomplexa: Adeleorina: Dactylosomatidae), with the description of Dactylosoma kermiti n. sp. parasitising Ptychadena anchietae and Sclerophrys gutturalis from South Africa
(Elsevier, 2020)Haemogregarine (Apicomplexa: Adeleorina) blood parasites are commonly reported from anuran hosts. Dactylosomatidae (Jakowska and Nigrelli, 1955) is a group of haemogregarines comprising Dactylosoma Labbé, 1894 and Babesiosoma ... -
An overview of the first decade of PollyNET: an emerging network of automated Raman-polarization lidars for continuous aerosol profiling
(EGU, 2016)A global vertically resolved aerosol data set covering more than 10 years of observations at more than 20 measurement sites distributed from 63 N to 52 S and 72 W to 124 E has been achieved within the Raman and ... -
Overview of the influences of mining-related pollution on the water quality of the Mooi River system's reservoirs, using basic statistical analyses and self organised mapping
(South African Water Research Commission, 2013)The Mooi River catchment, in particular the Wonderfonteinspruit (WFS), has been the subject of a large number of studies regarding significant pollution sources, generally attributed to mining in the area. However, very ... -
An overview of the MHONGOOSE survey: observing nearby galaxies with MeerKAT
(Sissa Medialab, 2016)MHONGOOSE is a deep survey of the neutral hydrogen distribution in a representative sample of 30 nearby disk and dwarf galaxies with H I masses from ∼ 10 6 to ∼ 10 11 M , and luminosities from M R ∼ 12 ... -
Oxidation of fatty acids are associated with Russian wheat aphid resistance in wheat
(Akadémiai Kiadó, 2015)The oxidation of fatty acids, which is responsible for changes in lipid composition, were investigated in a comparative study using the Russian wheat aphid (RWA) (Diuraphis noxia), infested and un-infested resistant (Tugela ... -
Oxidation of sodium thiocyanate (NaSCN) in Stretford aqueous liquor using air and commercial hydrogen peroxide (H2O2)
(ACS, 2016)Stretford processes are most widely utilized for the absorption of H2S from gaseous streams from the coal gasification process and converting the absorbed H2S into elemental sulfur. Hydrogen cyanide in the gaseous streams ... -
Oxidative copolymerization of p-phenylenediamine and 3-aminobenzenesulfonic acid
(Elsevier, 2016)The sulfonation of poly(p-phenylenediamine) (P(pPD)) was achieved by oxidative copolymerization of p-phenylenediamine (pPD) and 3-aminobenzenesulfonic acid (3ABSA) monomers using ammonium persulfate ((NH4)2S2O8). The yield, ... -
Oxidative stress and respiratory symptoms due to human exposure to polycyclic aromatic hydrocarbons (PAHs) in Kumasi, Ghana
(Elsevier, 2017)Studies of polycyclic aromatic hydrocarbons (PAHs) and its metabolites in PM10, soils, rat livers and cattle urine in Kumasi, Ghana, revealed high concentrations and cancer potency. In addition, WHO and IARC have reported ... -
Oxidative stress biomarkers in the Mediterranean pond turtle (Mauremys leprosa) reveal contrasted aquatic environments in Southern France
(Elsevier, 2017)Increasing anthropogenic activities, like agricultural practices, constitute the main causes of the loss of water quality and disruption of freshwater ecosystems. High concentrations of pesticides, as shown under experimental ... -
Oxidative stress biomarkers in West African Dwarf goats reared under intensive and semi-intensive production systems
(South African Society for Animal Science (SASAS), 2017)This study explored the variation in physiological oxidative status of West African Dwarf (WAD) goats as the rainy season progressed in a humid climate in south-west Nigeria. A total of 24 growing WAD bucks, averaging 10.5 ... -
Oxidative stress induced by glyphosate-based herbicide on freshwater turtles
(SETAC, 2017)Freshwater ecosystems face very strong anthropogenic pressures, among which overexploitation, habitat degradation, flow modification, species invasion, and water pollution lead to growing threats on biodiversity. Urbanization ... -
OXPHOS gene expression and control in mitochondrial disorders
(Elsevier, 2009)The cellular consequences of deficiencies of the mitochondrial OXPHOS system include a variety of direct and secondary changes in metabolite homeostasis, such as ROS, Ca2+, ADP/ATP, and NAD/NADH. The adaptive responses to ... -
Oxygen consumption rate of Caenorhabditis elegans as a high-throughput endpoint of toxicity testing using the Seahorse XFe96 Extracellular Flux Analyze
(Nature Research, 2020)Caenorhabditis elegans presents functioning, biologically relevant phenotypes and is frequently used as a bioindicator of toxicity. However, most C. elegans in vivo effect-assessment methods are laborious and time consuming. ... -
The oxygen consumption rate of three lepidopteran maize pest species measured by a Clark polarographic oxygen electrode using an air-to-water respirometer chamber of novel design - short communication
(ESSA, 2018)In the past, traditional oxygen consumption mea - surements on air-breathers have been made by means of chemical (Winkler titration) (Winkler 1888), physical (Cartesian divers) (Howard et al . 1965) ... -
Ozone concentration dependant autohaemotherapy effects on baboon antioxidant capacity and DNA integrity and repair capacity of lymphocytes
(Academic Journals, 2009)Although ozone is widely used as an alternative medicine, its safety and efficiency are met with scepticism. To shed some light on this, we assessed the effect of ozone-autohaemotherapy, using an O2/O3 gas mixture ...