Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 114-133 of 4825
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Adsorption behavior of glucosamine-based, pyrimidine-fused heterocycles as green corrosion inhibitors for mild steel: experimental and theoretical studies
(American Chemical Society, 2016)Effects of electron donating (−CH3 and −OH) and electron withdrawing (−NO2) substituents on the corrosion inhibition efficiency of four glucosamine-based, substituted, pyrimidine-fused heterocycles (CARBs) on mild steel ... -
Adsorption characteristics of Iota-carrageenan and Inulin biopolymers as potential corrosion inhibitors at mild steel/sulphuric acid interface
(Elsevier, 2017)The corrosion inhibition efficiency performance of biopolymers Iota-carrageenan (IC) and Inulin (INU) on mild steel in 0.5 M H2SO4 solution was evaluated using weight loss, potentiodynamic polarization and electrochemical ... -
Adsorption, Thermodynamic and Quantum Chemical Studies of 1–hexyl–3–methylimidazolium Based Ionic Liquids as Corrosion Inhibitors for Mild Steel in HCl
(MDPI, 2015)The inhibition of mild steel corrosion in 1 M HCl solution by some ionic liquids (ILs) namely, 1-hexyl-3-methylimidazolium trifluoromethanesulfonate [HMIM][TfO], 1-hexyl-3-methylimidazolium tetrafluoroborate [HMIM][BF4], ... -
Adsorption, uptake and distribution of gold nanoparticles in Daphnia magna following long term exposure
(Elsevier, 2016)Gold nanoparticles (nAu) have recently been studied and developed within the biological and photothermal therapeutic contexts. The major clinical interest is within the application of novel drug delivery systems. Environmental ... -
Adult dragonflies are indicators of environmental metallic elements
(Elsevier, 2018)Adult dragonflies (Insecta; Odonata) are aerial predatory arthropods that occur globally except in the polar regions. However, we know of no research on adult dragonflies as potential indicators of metallic elements in the ... -
Advancing the theory and practice of impact assessment: setting the research agenda
(ELSEVIER, 2013)Impact assessment has been in place for over 40 years and is now practised in some form in all but two of the world's nations. In this paper we reflect on the state of the art of impact assessment theory and practice, ... -
The advent of GPU ray tracers
(IBIMA, 2010)Ever since it's introduction in 1980 the ray tracing algorithm has been a tricky puzzle. On the one hand it offers photo-realistic rendering superior to the more common rasterization algorithm, but on the other it's much ... -
The adversarial threat posed by the NSA to the integrity of the internet
(IEEE, 2015)In 2013, Edward Snowden, a NSA Contractor leaked thousands of highly classified documents about the activities of the USA's National Security Agency (NSA) and its foreign intelligence partners known as the "Five Eyes" ... -
Adverse effect of heavy metals (As, Pb, Hg, and Cr) on health and their bioremediation strategies: a review
(Springer, 2018)Currently, heavy metal pollution becomes a severe problem whole over the world, and these toxic metals enter into the environment either by natural phenomena or due to extensive industrialization. The discharged effluents ... -
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 ...