Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 1292-1311 of 4825
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Drivers of changing urban flood risk: a framework for action
(Elsevier, 2019)This study focuses on drivers for changing urban flood risk. We suggest a framework for guiding climate change adaptation action concerning flood risk and manageability in cities. The identified key drivers of changing ... -
Drivers of regional crop variability in Chad
(Elsevier, 2020)Highlights • Combines environmental and livelihood data to analyze regional crop production in Chad. • Structural breaks are identified and used to detrend the crop statistics. • Combines quantitative and qualitative ... -
Drivers, opportunities and barriers for a retailer in the pursuit of more sustainable packaging redesign
(Elsevier, 2018)Redesign can reduce the environmental impact generated by product packaging. The literature presents the elements to be observed in a packaging redesign, as well as the important role of the retailer in delivering more ... -
Drought-associated absence of alien invasive anchorworm, Lernaea cyprinacea (Copepoda: Lernaeidae), is related to changes in fish health
(Elsevier, 2017)Recently, Mozambique tilapia (Oreochromis mossambicus Peters, 1852) were listed on the IUCN Red List as near-threatened as their populations are at risk due to hybridization. Another factor that potentially contributes to ... -
Dual radiolabeling as a technique to track nanocarriers: the case of gold nanoparticles
(MDPI, 2015)Gold nanoparticles (AuNPs) have shown great potential for use in nanomedicine and nanotechnologies due to their ease of synthesis and functionalization. However, their apparent biocompatibility and biodistribution is still ... -
A dual-channel gas chromatography method for the quantitation of low and high concentrations of NF3 and CF4 to study membrane separation of the two compounds
(Elsevier, 2013)A dual-channel gas chromatographic method is described in this paper that can be conveniently used for quantitation of NF3/CF4 mixtures with a thermal conductivity detector (TCD) on one channel for the quantitation of ... -
The dynamic heliosphere, solar activity, and cosmic rays
(Elsevier, 2010)This brief review addresses the relation between solar activity, cosmic ray variations and the dynamics of the heliosphere. The global features of the heliosphere influence what happens inside its boundaries on a variety ... -
Dynamical masses of brightest cluster galaxies. I. Stellar velocity anisotropy and mass-to-light ratios
(Oxford Univ press, 2020)We investigate the stellar and dynamical mass profiles in the centres of 25 brightest cluster galaxies (BCGs) at redshifts of 0.05 ≤ z ≤ 0.30. Our spectroscopy enables us to robustly measure the Gauss–Hermite higher order ... -
Dynamical modelling of brightest cluster galaxies: constraints on the IMF
(Cambridge Univ Press, 2020)We study the stellar and dynamical masses, as well as the stellar populations, of brightest cluster galaxies (BCGs) located in 32 massive clusters, and for a sub-sample of these use the results to place constraints on the ... -
Dynamical models of interactions between herds forage and water resources in Sahelian Region
(2014)Optimal foraging is one of the capital topics nowadays in Sahelian region. The vast majority of feed consumed by ruminants in Sahelian region is still formed by natural pastures. Pastoral constraints are the high variability ... -
The dynamics of toxic microcystis strains and microcystin production in two hypertrofic South African reservoirs
(Elsevier, 2012)The South African impoundments of Hartbeespoort and Roodeplaat experience excessive blooms of Microcystis species each year. Microcystins, produced primarily by strains of cyanobacteria belonging to the genera Microcystis, ... -
Dynamics on noncommutative Orlicz spaces
(Springer, 2020)Quantum dynamical maps are defined and studied for quantum statistical physics based on Orlicz spaces. This complements earlier work [26] where we made a strong case for the assertion that statistical physics of regular ... -
An early alert feedback system in learning
(IADIS, 2017)The fields of teaching and learning are evolving as a result of new techniques like blended-, online-, and exploratory learning being implemented. Lecturers need to ensure successful teaching and also create an environment ... -
Early science with the Karoo Array Telescope: a mini-halo candidate in galaxy cluster Abell 3667
(Oxford University Press, 2015)Abell 3667 is among the most well-studied galaxy clusters in the Southern hemisphere. It is known to host two giant radio relics and a head–tail radio galaxy as the brightest cluster galaxy. Recent work has suggested the ... -
Earthworm (Eisenia Fetida) bioassay to assess the possible effects of platinum tailings disposal facilities on the environment along a gradient
(ALÖKI Applied Ecological Research and Forensic Institute Ltd., 2008)Platinum mines produce large amounts of inorganic tailings containing high levels of metals which are disposed of on tailings disposal facilities (TDFs) and there is no information available on their possible effects on ... -
Earthworms and mesofauna from an isolated, alkaline chemical waste site in Northwest England
(Elsevier, 2017)Post-industrial sites across Europe may have developed over periods in excess of a century, often leading to poor nutrient soils with noxious constituents and extreme pH values. One such site, Nob End (Bolton, UK), a toxic ... -
Easterly wave contributions to seasonal rainfall over the tropical Americas in observations and a regional climate model
(Springer, 2020)Easterly waves (EWs) are important moisture carriers and their variability can impact the total May–November rainfall, defined as seasonal precipitation, over the Tropical Americas. The contribution of EWs to the seasonal ... -
Easy chairs: the conformational preferences of polyfluorocyclohexanes
(Royal Society of Chemistry, 2013)Polyfluorocyclohexanes present an interesting challenge to our current understanding of fundamental organic chemistry. In part to improve molecular mechanics methods and facilitate drug design, a systematic survey of ... -
EBL inhomogeneity and hard-spectrum gamma-ray sources
(IOP Publishing, 2017)The unexpectedly hard very-high-energy (VHE; E > 100 GeV) γ-ray spectra of a few distant blazars have been interpreted as evidence of a reduction of the γγ opacity of the universe due to the interaction of VHE γ-rays with ... -
The echo of pulmonary tuberculosis: mechanisms of clinical symptoms and other disease-induced systemic complications
(American Society for Microbiology, 2020)Clinical symptoms of active tuberculosis (TB) can range from a simple cough to more severe reactions, such as irreversible lung damage and, eventually, death, depending on disease progression. In addition to its clinical ...