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Now showing items 7476-7495 of 7909
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Unpreparedness and uncertainty: a qualitative study of African American experiences during COVID-19 pandemic
(Sociological Spectrum, 2022)During disasters, vulnerable populations are disproportionately affected. COVID-19 disproportionately affected African American (AA) families, increasing their risk for COVID-19 morbidity and mortality. The pandemic also ... -
Unraveling the diversification and systematic puzzle of the highly polymorphic Psammobates tentorius (Bell, 1828) complex (Reptilia: Testudinidae) through phylogenetic analyses and species delimitation approaches
(Wiley-Blackwell, 2020)The high level of phenotypic diversity in southern African tent tortoises (Psammobates tentorius complex) has for decades prevented systematists from developing a stable taxonomy for the group. Here, we used a comprehensive ... -
The unresolved ethnic question in Uganda’s district councils
(Law, Democracy & Development, 2015)This article examines the legal and constitutional framework for the election of district councils in Uganda because the design and practice of elections in Uganda has an impact on Uganda’s ability to follow through on the ... -
Unspoken inequality: How COVID-19 has exacerbated existing vulnerabilities of asylum-seekers, refugees, and undocumented migrants in South Africa
(Springer Nature, 2020)An estimated 2 million foreign-born migrants of working age (15-64) were living in South Africa (SA) in 2017. Structural and practical xenophobia has driven asylum-seekers, refugees, and undocumented migrants in SA to ... -
Unsupervised machine learning for transient discovery in deeper, wider, faster light curves
(Oxford University Press, 2020)Identification of anomalous light curves within time-domain surveys is often challenging. In addition, with the growing number of wide-field surveys and the volume of data produced exceeding astronomers’ ability for manual ... -
Unsustainable and unjust: Criminal justice policy and remand detention since 1994
(Institute for Security Studies (ISS), 2014)The 'tough on crime' approach embodied in bail and sentencing law has had a profound impact on the trends around remand detention, including prison overcrowding of such an extent that it is estimated to have contributed ... -
Untangling the Lion's Tale: Violent masculinity and the ethics of biography in the 'Curious' case of the apartheid-era policeman Donald Card
(Routledge Taylor Francis Group, 2013)Donald Card (1928–) is a former policeman in South Africa who became the subject of international media attention on 21 September 2004. In a highly publicised and symbolic ceremony of reconciliation inaugurating the ... -
An unusual 2,3-secotaraxerene and other cytotoxic triterpenoids from pleiocarpa pycnantha (apocynaceae) leaves collected from Nigeria
(MDPI, 2014)Three known triterpenoids, namely ursolic acid (1), and the 27-E- and 27-Z-pcoumaric esters of ursolic acid (compounds 2, 3), were isolated together with a new triterpene 2,3-seco-taraxer-14-en-2,3-lactone [pycanocarpine ... -
Unveiling the inhibitory potentials of peptidomimetic azanitriles and pyridyl esters towards sars-cov-2 main protease: a molecular modelling investigation
(MDPI, 2023)The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is responsible for COVID-19, which was declared a global pandemic in March 2020 by the World Health Organization (WHO). Since SARS-CoV-2 main protease plays ... -
Unveiling the Inhibitory Potentials of Peptidomimetic Azanitriles and Pyridyl Esters towards SARS-CoV-2Main Protease: A MolecularModelling Investigation
(MDPI, 2023)The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is responsible for COVID-19, which was declared a global pandemic in March 2020 by the World Health Organization (WHO). Since SARS-CoV-2 main protease plays ... -
Unveiling the universe with emerging cosmological probes
(Springer, 2022)The detection of the accelerated expansion of the Universe has been one of the major breakthroughs in modern cosmology. Several cosmological probes (Cosmic Microwave Background, Supernovae Type Ia, Baryon Acoustic Oscillations) ... -
An update on the techniques used to measure oxidative stress in seminal plasma
(Blackwell Publishing Ltd, 2021)Reactive oxygen species (ROS) are produced in significant amounts by spermatozoa and leucocytes. They are necessary to carry out various physiological functions such as sperm capacitation, hyperactivation, acrosome reaction, ... -
Updates and advances to the FAO56 crop water requirements method
(Elsevier, 2021)This study reviews the abundant research on FAO56 crop coefficients, published following introduction ofthe FAO56 paper in 1998. The primary goal was to evaluate, update, and consolidate the mid-season andend-season single ... -
Updates and advances to the FAO56 crop water requirements method
(Elsevier, 2021)This study reviews the abundant research on FAO56 crop coefficients, published following introduction of the FAO56 paper in 1998. The primary goal was to evaluate, update, and consolidate the mid-season and end-season ... -
The upper temperature for life – where do we draw the line?
(Elsevier, 2004)The newly isolated hyperthermophilic archaeal strain 121 grows slowly at 121 8C and even survives short periods at 130 8C. This is another organism that grows best at temperatures well in excess of 100 8C! We should not ... -
Upscaling agriculture and food security in Africa in pursuit of the SDGs: What role does China play?
(Springer Nature, Cham, 2020)China and Africa constitute more than a third of the world’s population and China has become Africa’s largest trading partner. This has led to other forms of engagement with African countries, shaping development policies ... -
Uptake and predictors of early postnatal follow–up care amongst mother–baby pairs in South Africa: Results from three population–based surveys, 2010–2013
(Edinburgh University Global Health Society, 2017)BACKGROUND Achieving World Health Organization (WHO) recommendations for postnatal care (PNC) within the first few weeks of life is vital to eliminating early mother–to–child transmission of HIV (MTCT) and improving ... -
Uptake of, barriers and enablers to the utilization of postnatal care services in Thyolo, Malawi
(BMC, 2023)Postnatal care (PNC) ensures early assessments for danger signs during the postpartum period and is to be provided within 24 h of birth, 48–72 h, 7–14 days, and six weeks after birth. This study assessed the uptake of ... -
Urban agriculture and the sustainability nexus in South Africa: Past, current, and future trends
(Springer, 2023)Urban agriculture remains a topical issue that needs to be better understood in striving for sustainable cities, particularly in sub-Saharan Africa. Through a literature review, this article examines urban agriculture ... -
Urban food insecurity and the impact of China’s affordable food shop (AFS) program: a case study of Nanjing City
(Applied Geography, 2023)Food subsidies are widely implemented as part of government policies globally to mitigate food insecurity amongst the urban poor. Subsidies to retail outlets are one a type of supply-side subsidy designed to make food more ...