Browsing Faculty of Natural Sciences by Title
Now showing items 1377-1396 of 2571
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Low- And medium-spin negative-parity bands in the Os 187 nucleus
(American Physical Society, 2021)Low- and medium-spin negative-parity bands of Os187 have been studied using the AFRican Omnipurpose Detector for Innovative Techniques and Experiments (AFRODITE) array, following the W186(He4,3n)Os187 reaction at a beam ... -
Low-Cost feedstock conversion to biodiesel via ultrasound technology
(MDPI, 2009)Biodiesel has attracted increasing interest and has proved to be a good substitute for fossil-based fuels due to its environmental advantages and availability from renewable resources such as refined and waste vegetable ... -
A low-cost flow cytometric assay for the detection and quantification of apoptosis using an anionic halogenated fluorescein dye
(Future Science Group, 2008)We describe here a technical improvement of an established colorimetric method used to detect and measure the occurrence of apoptosis in mammalian cells during in vitro cell culture. This assay uses an anionic halogenated ... -
Low-operational temperature for selective detection of xylene gas using a p-n CuO-ZnO heterostructure-based sensor
(Elsevier Ltd, 2023)Xylene is not just considered detrimental to the environment but also hazardous to humans. Herein we report on xylene vapour detection using CuO-ZnO heterostructures containing various concentrations (0.1–2.0 wt%) of Zn, ... -
The low-redshift circumgalactic medium in SIMBA
(Oxford University Press, 2021-08)We examine the properties of the low-redshift circumgalactic medium (CGM) around star-forming and quenched galaxies in the SIMBA cosmological hydrodynamic simulations, focusing on comparing H I and metal line absorption ... -
Lyman α absorption beyond the disc of simulated spiral galaxies
(Oxford University Press, 2020)We present an analysis of the origin and properties of the circumgalactic medium (CGM) in a suite of 11 cosmological zoom simulations resembling present-day spiral galaxies. On average the galaxies retain about 50 per cent ... -
MACRODONTIA: A brief overview and a case report of KBG syndrome
(Elsevier, 2021)Macrodontia is a dental condition where a tooth or group of teeth are abnormally larger than average. Functional and aesthetic discrepancies may arise in affected individuals resulting in lowering the quality of life. It ... -
The macrophage response to mycobacterium tuberculosis and opportunities for autophagy inducing nanomedicines for Tuberculosis therapy
(Frontiers Media S.A., 2021)The major causative agent of tuberculosis (TB), i.e., Mycobacterium tuberculosis (Mtb), has developed mechanisms to evade host defense responses and persist within host cells for prolonged periods of time. Mtb is also ... -
Magnesium- and intermetallic alloys-based hydrides for energy storage: Modelling, synthesis and properties
(IOP Publishing, 2022)Hydrides based on magnesium and intermetallic compounds provide a viable solution to the challenge of energy storage from renewable sources, thanks to their ability to absorb and desorb hydrogen in a reversible way with a ... -
Magnesium–carbon hydrogen storage hybrid materials produced by reactive ball milling in hydrogen
(Elsevier, 2013)Time-resolved studies uncovered kinetics and mechanism of Mg–hydrogen interactions during High energy reactive ball milling in hydrogen (HRBM) in presence of various types of carbon, including graphite (G), activated carbon ... -
Making a community network legal within the South African regulatory framework
(ACM, 2015)Community networks often operate at the fringe of legality with respect to spectrum, network infrastructure and providing services. We have been involved with such a network in a rural community, and together with them, ... -
Male age and progressive sperm motility are critical factors affecting embryological and clinical outcomes in oocyte donor ICSI cycles
(Reproductive Sciences, 2021)This retrospective cohort study aimed to explore whether paternal age and semen quality parameters affect the embryological and clinical outcomes of ICSI with oocyte donation. A total of 339 oocyte donation (OD)-ICSI cycles ... -
Male infertility
(Lancet Publishing Group, 2021)It is estimated that infertility affects 8–12% of couples globally, with a male factor being a primary or contributing cause in approximately 50% of couples. Causes of male subfertility vary highly, but can be related to ... -
Male infertility, oxidative stress and antioxidants
(IntechOpen, 2021)Within the male reproductive system, oxidative stress (OS) has been identified as prevailing etiology of male infertility. The effects of reactive oxygen species (ROS) on male fertility depend on the dimensions, “modus ... -
MAMMOTH: Confirmation of two massive galaxy overdensities at z = 2.24 with Hα emitters
(Oxford University Press, 2021)Massive galaxy overdensities at the peak epoch of cosmic star formation provide ideal testbeds for the formation theories of galaxies and large-scale structure. We report the confirmation of two massive galaxy overdensities ... -
Managing information in education: a view from South Africa
(Emerald, 2017)PURPOSE – A three-year study of information technology and information systems management in South Africa has delivered (amongst other things) a bibliography and a new reference model. The paper aims to discuss this ... -
Mapping and characterisation of the sorghum cell suspension culture secretome
(Academic Journals, 2011)Here we reported the first secretomic study of sorghum (Sorghum bicolor), a naturally drought tolerant cereal crop. In this study, we used a gel-based proteomic approach in combination with mass spectrometry to separate ... -
Mapping rangeland ecosystems vulnerability to Lantana camarainvasion in semi-arid savannahs in South Africa
(Journal of Ecology, 2022)We mapped and modelled the potential areas vulnerable to Lantana camara (L. camara) invasion in semi-arid savannah ecosystems in the communal lands of Bushbuckridge and Kruger National Park, South Africa. Specifically, we ... -
Marburg virus disease amid Covid-19 in West Africa: An emerging and re-emerging zoonotic epidemic threat, future implications and way forward
(2023)Amid the coronavirus 2019 (COVID-19) pandemic, several African countries including Ghana and Equatorial Guinea have reported several zoonotic outbreaks. The COVID-19 pandemic has added more strain on the already ... -
Marburg virus disease outbreak amidst COVID-19 in the Republic of Guinea: A point of contention for the fragile health system?
(Elsevier, 2022)In August 2021, the Marburg virus disease (MVD) outbreak was confirmed amid the coronavirus disease 2019 (COVID-19) pandemic in the Republic of Guinea. This is the first time it is detected in Guinea and West Africa. Marburg ...