Now showing items 1111-1130 of 1452

  • Radiations and male fertility 

    Kesari, Kavindra Kumar; Agarwal, Ashok; Henkel, Ralf (Springer Nature, 2018)
    During recent years, an increasing percentage of male infertility has to be attributed to an array of environmental, health and lifestyle factors. Male infertility is likely to be affected by the intense exposure to heat ...
  • Radio continuum surveys with square kilometre array pathfinders 

    Norris, Ray P.; Afonso, J.; Bacon, David; Cress, Catherine (Cambridge University Press, 2013)
    In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (The Netherlands), ASKAP (Australia), ...
  • Radio-loud active calactic nucleus: is there a link between luminosity and cluster environment? 

    Ineson, J.; Croston, J. H.; Jarvis, Matt; Hardcastle, M.J.; Evans, D. A.; Kraft, R. P. (American Physical Society, 2013)
    We present here the first results from the Chandra ERA (Environments of Radio-loud AGN) Large Project, characterizing the cluster environments of a sample of 26 radio-loud active galactic nuclei (AGNs) at z ∼ 0.5 that ...
  • Radon-222 measurements at Cape Point: A characterization of a 15-year time series 

    Botha, R.; Labuschagne, C.; Williams, A.G.; Bosman, G.; Brunke, E.-G.; Rossouw, A.; Lindsay, R. (National Association for Clean Air, 2018)
    The Cape Point (CPT) Global Atmosphere Watch (GAW) research station have been monitoring climatically significant trace gases for four decades. Among these is radon, a naturally occurring noble gas with a large continental ...
  • Rapid assessment of tissue nitrogen in cultivated Gracilaria gracilis (Rhodophyta) and Ulva lactuca (Chlorophyta) 

    Robertson-Andersson, Deborah; Wilson, D.T.; Bolton, John J.; Anderson, Robert J.; Maneveldt, Gavin (NISC, 2009)
    Tissue nitrogen content and thallus colour were quantified using a rapid assessment method based on the Pantone® matt uncoated formula guide for raft-cultivated Gracilaria gracilis Steentoft Irvine et Farnham at Saldanha ...
  • Rare fungal species isolated from Libyan diabetic patients 

    Esmaio, Mustafa; Abrantes, Pedro Miguel dos Santos; Africa, Charlene W.J. (Infection Control Africa Network (ICAN), 2016)
    BACKGROUND AND OBJECTIVES: The emerging resistance of Candida species to antifungals routinely used to treat candidiasis in HIV patients and in patients with diabetes mellitus (DM) has resulted in the frequent isolation ...
  • A re-assessment of the nearest neighbour alignment of the X-ray isophotes of galaxy clusters 

    Koen, Chris; Lombard, Fred (Oxford University Press, 2006)
    Alignment is defined as the tendency of the distribution of pointing angles between the major axes of clusters and their nearest neighbours to be more concentrated towards small values for small nearest neighbour distances, ...
  • Re-engineering of South Africa’s primary health care system: where is the pharmacist? 

    Bheekie, Angeni; Bradley, Hazel A. (South African Academy of Family Physicians, 2016)
    South Africa’s transition towards a district-based health system (DHS) aims to offer health promotion and prevention services at community level, through re-engineered primary health care (PHC) services. Along with pharmacy ...
  • Reactive oxygen species and male reproductive hormones 

    Darbandi, Mahsa; Darbandi, Sara; Agarwal, Ashok; Sengupta, Pallav; Durairajanayagam, Damayanthi; Henkel, Ralf; Sadeghi, Mohammad Reza (BMC, 2018)
    Reports of the increasing incidence of male infertility paired with decreasing semen quality have triggered studies on the effects of lifestyle and environmental factors on the male reproductive potential. There are ...
  • Reactive oxygen species and male reproductive hormones 

    Darbandi, Mahsa; Darbandi, Sara; Agarwal, Ashok; Sengupta, Pallav; Durairajanayagam, Damayanthi; Henkel, Ralf; Sadeghi, Mohammad Reza (BMC, 2018)
    Reports of the increasing incidence of male infertility paired with decreasing semen quality have triggered studies on the effects of lifestyle and environmental factors on the male reproductive potential. There are ...
  • Reactive oxygen species in male reproduction: A boon or a bane? 

    Finelli, Renata; Henkel, Ralf; Baskaran, Saradha (Wiley, 2020)
    Reactive oxygen species (ROS) are free radicals derived from oxygen during normal cellular metabolism. ROS play a crucial role in the physiological processes and signalling pathways associated with male fertility. At ...
  • Reactive oxygen species in male reproduction: A boon or a bane? 

    Henkel, R; Baskaran, S; Finelli, R (Blackwell Publishing Ltd, 2021)
    Reactive oxygen species (ROS) are free radicals derived from oxygen during normal cellular metabolism. ROS play a crucial role in the physiological processes and signalling pathways associated with male fertility. At ...
  • Real-time gesture recognition using eigenvectors 

    Segers, Vaughn; Connan, James (2009)
    This paper discusses an implementation for gesture recognition using eigenvectors under controlled conditions. This application of eigenvector recognition is trained on a set of defined hand images. Training images are ...
  • Reasons for missed appointments linked to a public-sector intervention targeting patients with stable chronic conditions in South Africa: results from in-depth interviews and a retrospective review of medical records 

    Magadzire, Bvudzai P.; Mathole, Thubelihle; Ward, Kim (BioMed Central, 2017)
    BACKGROUND Missed appointments serve as a key indicator for adherence to therapy and as such, identifying patient reasons for this inconsistency could assist in developing programmes to improve health outcomes. In this ...
  • Reconstructing the deep-branching relationships of the papilionoid legumes 

    Cardoso, D.; Pennington, R.T.; de Queiroz, L.P.; Boatwright, James S.; van Wyk, Brian Eduard; Wojciechowski, M.F.; Lavin, M. (Elsevier, 2013)
    Resolving the phylogenetic relationships of the deep nodes of papilionoid legumes (Papilionoideae) is essential to understanding the evolutionary history and diversification of this economically and ecologically important ...
  • Reconstruction of major maternal and paternal lineages of the Cape Muslim population 

    Isaacs, Shafieka; Geduld-Ullah, Tasneem; Benjeddou, Mongi (Sociedade Brasileira de Genética, 2013)
    The earliest Cape Muslims were brought to the Cape (Cape Town - South Africa) from Africa and Asia from 1652 to 1834. They were part of an involuntary migration of slaves, political prisoners and convicts, and they ...
  • Records of ctenophores from South Africa 

    Gibbons, Mark J.; Haddock, Steven H.D.; Matsumoto, George I. (PeerJ, 2021)
    Although ctenophores can be conspicuous components of the plankton in coastal marine ecosystems, only six species have been formally described from around South Africa. Using photographs from local community scientists, ...
  • Records of ctenophores from South Africa 

    Gibbons, M.J; Haddock, S.H.D; Matsumoto, G.I (PeerJ Inc., 2021)
    Although ctenophores can be conspicuous components of the plankton in coastal marine ecosystems, only six species have been formally described from around South Africa. Using photographs from local community scientists, ...
  • Recursion relations for gravitational lensing 

    Clarkson, Chris; Normann, Ben David (Springer Nature, 2019)
    The weak gravitational lensing formalism can be extended to the strong lensing regime by integrating a nonlinear version of the geodesic deviation equation. The resulting ‘roulette’ expansion generalises the notion of ...
  • Reflecting on the current scenario and forecasting the future demand for medical doctors in South Africa up to 2030: towards equal representation of women 

    Karangwa, I; Tiwari, R; Wildschut-February, A (Springer Nature, 2021)
    Increasing feminization of medical professions is well-acknowledged. However, this does not always equate to equitable representation of women within medicine, regarding their socio-demographic indicators, regions, sectors ...