Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 124-143 of 4825
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Aegiochus gracilipes (Hansen, 1895) a senior synonym of Aegiochus tara Bruce, 2009 (Crustacea: Isopoda: Aegidae)
(Magnolia Press, 2020)Aegiochus gracilipes Hansen, 1895 was described from a single immature specimen accompanied by three figures (Hansen 1895). Hansen (1916) subsequently reported the species without figures. Over the next 100 years A. ... -
The AeroCom evaluation and intercomparison of organic aerosol in global models
(EGU, 2014)This paper evaluates the current status of global modeling of the organic aerosol (OA) in the troposphere and analyzes the differences between models as well as between models and observations. Thirty-one global chemistry ... -
Aerosol characterisation including oxidative potential as a proxy of health impact: a case of a residential site in a highly industrialised area
(NACA, 2019)This study aimed to characterise aerosols sampled in the vicinity of a major industrialised area, i.e. the Vaal Triangle. It included the determination of oxidative potential as a predictive indicator of particle toxicity. ... -
Aerosol optical properties and direct radiative effect over Gobabeb, Namibia
(NACA, 2019)Atmospheric aerosols contribute significantly to the uncertainty in radiative forcing effects that influence the climate as well as posing a significant health risk to humans. The climatic implications of aerosols are ... -
Aerosol remote sensing in polar regions
(Elsevier, 2015)Multi-year sets of ground-based sun-photometer measurements conducted at 12 Arctic sites and 9 Antarctic sites were examined to determine daily mean values of aerosol optical thickness τ(λ) at visible and near-infrared ... -
The aerosols, radiation and clouds in Southern Africa field campaign in Namibia: overview, illustrative observations, and way forward
(AMS, 2019)The Aerosol, Radiation and Clouds in southern Africa (AEROCLO-sA) project investigates the role of aerosols on the regional climate of southern Africa. This is a unique environment where natural and anthropogenic aerosols ... -
The aetiology of cardiovascular disease: a role for mitochondrial DNA?
(Clinics Cardive Publishing, 2018)Cardiovascular disease (CVD) is a world-wide cause of mortality in humans and its incidence is on the rise in Africa. In this review, we discuss the putative role of mitochondrial dysfunction in the aetiology of CVD and ... -
Aflatoxins in maize : can their occurrence be effectively managed in Africa in the face of climate change and food insecurity?
(MDPI AG, 2022)The dangers of population-level mycotoxin exposure have been well documented. Climate-sensitive aflatoxins (AFs) are important food hazards. The continual effects of climate change are projected to impact primary agricultural ... -
Aflatoxins in the soil ecosystem: an overview of its occurrence, fate, effects and future perspectives
(Springer, 2020)Aflatoxins are secondary metabolites produced by specific strains of fungi, especially Aspergillus spp. These natural toxins are mainly found in soil, decaying vegetation and food storage systems and are particularly ... -
African Herald snakes, Crotaphopeltis, show population structure for a widespread generalist but deep genetic divergence for forest specialists
(Wiley, 2020)The African colubrid snake genus Crotaphopeltis currently comprises six species and occurs throughout sub‐Saharan Africa. The most widespread of these, Crotaphopeltis hotamboeia , inhabits most biomes, aside from rainforest ... -
African horse sickness virus (AHSV) with a deletion of 77 amino acids in NS3/NS3a protein is not virulent and a safe promising AHS Disabled Infectious Single Animal (DISA) vaccine platform
(Elsevier, 2018)African horse sickness virus (AHSV) is a virus species in the genus Orbivirus of the family Reoviridae. Currently, nine serotypes have been defined showing limited cross neutralization. AHSV is transmitted by species of ... -
African horse sickness virus NS4 is a nucleocytoplasmic protein that localizes to PML nuclear bodies
(Microbiology Society, 2020)African horse sickness virus (AHSV) is the causative agent of the often fatal disease African horse sickness in equids. The non-structural protein NS4 is the only AHSV protein that localizes to the nucleus. Here we report ... -
African Indigenous Knowledge Systems and Natural Disaster Management in North West Province, South Africa
(Kamla-Raj, 2016)Contrary to the western view the Batswana were not mere victims of natural disasters. The case study of their indigenous knowledge systems on natural disaster management, demonstrates the wide knowledge they had on ... -
After-conference report: SACLA ’17. Letter to the editor
(South African Institute of Computer Scientists and Information Technologists, 2017) -
Afterlive: a performant code for Vlasov-Hybrid simulations
(Elsevier, 2018)A parallelized implementation of the Vlasov-Hybrid method Nunn (1993) is presented. This method is a hybrid between a gridded Eulerian description and Lagrangian meta-particles. Unlike the Particle-in-Cell method Dawson ... -
Age, growth rate and size at sexual maturity of Labeobarbus aeneus (Teleostei: Cyprinidae) in the middle Vaal River, South Africa
(Taylor & Francis, 2012)Age structure, growth and size at sexual maturity of smallmouth yellowfish, Labeobarbus aeneus (Burchell), were assessed in 2008–2009. Despite its angling and food importance, little has been published on many aspects of ... -
Age-dating luminous red galaxies observed with the Southern African Large Telescope
(Oxford Univ Press, 2017)We measure a value for the cosmic expansion of H(z) = 89 ± 23(stat) ± 44(syst) km s−1 Mpc−1 at a redshift of z ≃ 0.47 based on the differential age technique. This technique, also known as cosmic chronometers, uses the age ... -
An agenda for ethics and justice in adaptation to climate change
(Taylor & Francis, 2019)As experts predict that at least some irreversible climate change will occur with potentially disastrous effects on the lives and well-being of vulnerable communities around the world, it is paramount to ensure that these ... -
Agistemus aimogastaensis sp. n. (Acari, Actinedida, Stigmaeidae), a recently discovered predator of eriophyid mites Aceria oleae and Oxycenus maxwelli, in olive orchards in Argentina
(Pensoft Publishers, 2013)A new species, Agistemus aimogastaensis, is described with the aid of optical and Scanning Electron Microscopy. This mite is an important predator of two eriophyid mites (Aceria oleae and Oxycenus maxwelli) in olive ...