Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 4633-4652 of 4825
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Unusual haemogregarines parasitizing intertidal teleosts from the subtropical east coast of South Africa, with the description of Haemogregarina kunegemina sp. nov.
(Cambridge University Press, 2012)Of three intertidal fish species collected on the east coast of South Africa, 67% (127/190) had haemogregarine infections. Horned rockskippers, Antennablennius bifilum Günther, 1861, demonstrated 77% parasite prevalence, ... -
An unusual nesting site of a Mascarene Martin Phedina borbonica on Mauritius
(Taylor & Francis & National Inquiry Services Centre (NISC), 2011) -
An updated plant checklist for Tankwa Karoo National Park, South Africa
(Elsevier, 2013)An updated checklist is provided for the flora of Tankwa Karoo National Park, which occupies an area of 143,600 ha. A total of 730 species and 780 plant taxa (species, subspecies and varieties), representing 267 genera in ... -
Upper limits from HESS active galactic nuclei observations in 2005-2007
(EDP Sciences, 2008)Aims.Very high energy (VHE; GeV) γ-ray studies were performed for 18 active galactic nuclei (AGN) from a variety of AGN classes. Methods.VHE observations of a sample of 14 AGN, considered candidate VHE emitters, were ... -
Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with H.E.S.S.
(EDP Sciences, 2019)Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurable gamma-ray emission. We searched for ... -
Uranium pollution of the Wonderfonteinspruit, 1997-2008 Part 2: Uranium in water concentrations, loads and associated risks
(Water Researchh Commission, 2010) -
Uranium recovery and purification from simulated waste streams containing high uranium concentrations with dispersion liquid membranes
(Springer, 2018)The suitability of dispersion liquid membranes (DLMs) to recover and purify uranium from simulated waste streams containing nitric acid, high uranium concentrations and radionuclide contaminants with tributyl phosphate ... -
Uranium recovery from simulated molybdenum-99 production residue using non-dispersive membrane based solvent extraction
(Elsevier, 2016)Commercial alkaline dissolution molybdenum-99 (99Mo) producers are currently not recovering enriched uranium (U) from 99Mo production waste which has a unique actinide and fission product composition. During the development ... -
Urban critical infrastructure interdependencies in emergency management: findings from Abeokuta, Nigeria
(Emerald, 2017)Purpose - The purpose of this paper is to map the cascade effects of emergencies on critical infrastructure in a fast-growing city of a developing country. The paper specifically seeks to refocus the attention of decision ... -
Urban ecology in Cape Town: South African comparisons and reflections
(Ecology & Society, 2012)Little urban ecological research has been done in South Africa. The papers in the Ecology and Society special feature Urban Ecological and Social-Ecological Research in the City of Cape Town make, therefore, an important ... -
Urban ecology: policy issues resolved and unresolved
(Edward Elgar Publishing, 2011)Our contemporary world is an urban world (Pacione, 2005). In 2008 the proportion of people living in urban areas equalled their rural counterparts and it is expected that 70 per cent of the world population will inhabit ... -
Urban environmental policy in Africa: the real story
(Edward Elgar Publishing, 2007) -
Urban green infrastructure and ecosystem services in sub-Saharan Africa
(Elsevier, 2018)Africa is urbanizing at an astonishing rate. To meet many of the Sustainable Development Goals there will be a requirement for cities in sub-Saharan Africa to plan for, and manage, the rapid rise in the urban population. ... -
Urban land planning: the role of a master plan in influencing local temperatures
(ELSEVIER, 2013)Land use planning (LUP) is central for managing issues related to climatic variation in urban environments. However, Master Plans (MPs) usually do not include climatic aspects, and few studies have addressed climate ... -
Urban planning as an enabler of urban health: challenges and good practice in England following the 2012 planning and public health reforms
(Elsevier, 2019)This article synthesises the challenges faced by the English (urban) spatial planning system to become an enabler of urban health and explores some keys features of the evidence base, policy tools and policy implementation ... -
Urban socioeconomic inequality and biodiversity often converge, but not always: a global meta-analysis
(Elsevier, 2020)It is through urban biodiversity that the majority of humans experience nature on a daily basis. As cities expand globally, it is increasingly important to understand how biodiversity is shaped by human decisions, institutions, ... -
Urbanization affects frog communities at multiple scales in a rapidly developing African city
(Springer, 2015)Urbanization is worldwide among the biggest threats to amphibian populations. However, hardly any studies have been conducted on the effects thereof in developing countries. Amphibian distribution and community assemblages ... -
Urbanization erodes ectomycorrhizal fungal diversity and may cause microbial communities to converge
(Springer Nature, 2017)Urbanization alters the physicochemical environment, introduces non-native species and causes ecosystem characteristics to converge. It has been speculated that these alterations contribute to loss of regional and global ... -
Uridine diphosphate-glucuronosyltransferase (UGT) 2B subfamily interspecies differences in carnivores
(Oxford Univ Press, 2017)UDP-glucuronosyltransferases (UGTs) are among the most important xenobiotic metabolizing enzymes that conjugate a wide range of chemicals. Previous studies showed that Felidae and Pinnipedia species have very low UGT ...