Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 3299-3318 of 4825
-
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 ... -
Ozone concentrations and their potential impacts on Vegetation in Southern Africa
(Elsevier, 2013)The tropospheric ozone concentrations over southern Africa are relatively high due to large precursor emissions from biomass burning, vegetation and anthropogenic sources and the intensity of solar radiation. In this study, ... -
Ozone exposure of Flinders Sensitive Line rats is a rodent translational model of neurobiological oxidative stress with relevance for depression and antidepressant response
(Springer, 2015)Rationale Major depression has been associated with higher levels of air pollution that in turn leads to neurodegeneration via increased oxidative stress. There is a need for suitable translational animal models to study ... -
PAHs, OCPs and PCBs in sediments from three catchments in Durban, South Africa
(NISC, 2018)Polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were analysed from sediment samples collected in 2012 from rivers, surface runoff canals and estuaries in three ... -
Pairs trading on the Johannesburg Stock Exchange
(Taylor & Francis, 2013)Pairs trading strategies aim to profit from temporary deviations in some underlying relationship between the prices of two stocks. The trader takes appropriate long and short positions in the two stocks and waits for their ... -
Palladium (II) complexes chelated by 1‐substituted‐4‐pyridyl‐1H‐1,2,3‐triazole ligands as catalyst precursors for selective ethylene dimerization
(Wiley, 2020)A series of neutral as well as cationic palladium methyl complexes bearing 1‐substituted‐4‐pyridyl‐1H‐1,2,3‐triazole ligands were prepared and fully characterized by a range of analytical techniques. Conventional and 2D ... -
Palladium(II) and platinum(II) complexes of N-butyl-N-phenyldithiocarbamate: synthesis, characterization, biological activities and molecular docking studies
(Elsevier, 2016)The reaction of ammonium N-butyl-N-phenyldithiocarbamate with the chloride salts of platinum and palladium, at room temperature, leads to the formation of [PtL2] and [PdL2](L = N-butyl-N-phenyldithiocarbamate). These ... -
Panel-based nuclear and mitochondrial next-generation sequencing outcomes of an ethnically diverse pediatric patient cohort with mitochondrial disease
(Elsevier, 2019)Mitochondrial disease (MD) is a group of rare inherited disorders with clinical heterogeneous phenotypes. Recent advances in next-generation sequencing (NGS) allow for rapid genetic diagnostics in patients who experience ... -
PANGU (PAir-productioN Gamma-ray Unit): a high resolution gamma-ray space telescope
(Sissa Medialab, 2015) -
Paracetamol prevents hyperglycinemia in vervet monkeys treated with valproate
(Springer, 2012)Valproate administration increases the level of the inhibitory transmitter, glycine, in the urine and plasma of patients and experimental animals. Nonketotic hyperglycinemia (NKH), an autosomal recessive disorder of ... -
Paradigm shift in engineering of pluvial floods: from historical recurrence intervals to risk-based design for an uncertain future
(Elsevier, 2020)Precipitation is intrinsically associated with high uncertainty, which is exacerbated exponentially over time—especially concerning climate change. However, the current design practice in urban drainage infrastructure ... -
The paradox between technology adoption and student success: a case study
(Unisa Press, 2011)There are different factors influencing the adoption of technology in the service of learning in open and distance learning (ODL) in a developmental state such as South Africa. While there is ample reason to increasingly ... -
Paragigagnathus iraniensis n. sp. (Acari: Phytoseiidae) from Western Iran
(Acarologia, 2016)A new species belonging to the family Phytoseiidae, Paragigagnathus iraniensis n. sp., is described and illustrated from specimens collected on almond trees, Prunus dulcis (Mill.) D.A. Webb (Rosaceae), infested with ... -
Parasite host-switching from the invasive American red-eared slider, Trachemys scripta elegans, to the native Mediterranean pond turtle, Mauremys leprosa, in natural environments
(REABIC, 2015)The red-eared slider turtle, Trachemys scripta elegans, is among the most over-exploited animals and is still exported annually from the USA all over the world. Once introduced into its new environment, feral populations ... -
Parasite infection directly impacts escape response and stress levels in fish
(Company of Biologists, 2020)Parasites can account for a substantial proportion of the biomass in marine communities. As such, parasites play a significant ecological role in ecosystem functioning via host interactions. Unlike macropredators, such ... -
Parasite infestation increases on coral reefs without cleaner fish
(Springer, 2018)Mutualisms are pivotal in shaping ecological communities. Iconic images of cleaner fish entering the mouths of predatory fish clients to remove ectoparasites epitomize their mutual benefit. Experimental manipulations of ... -
Parasite responses to pollution: what we know and where we go in ‘ Environmental Parasitology ’
(BioMed Central, 2017)Environmental parasitology deals with the interactions between parasites and pollutants in the environment. Their sensitivity to pollutants and environmental disturbances makes many parasite taxa useful indicators of ... -
Parasite-mediated enemy release and low biotic resistance may facilitate invasion of Atlantic coral reefs by Pacific red lionfish (Pterois volitans)
(Springer, 2017)Successful invasions are largely explained by some combination of enemy release, where the invader escapes its natural enemies from its native range, and low biotic resistance, where native species in the introduced range ...