Browsing Faculty of Natural Sciences by Title
Now showing items 283-302 of 2571
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A census of the pulsar population observed with the international LOFAR station FR606 at low frequencies (25–80 MHz)
(EDP Sciences, 2020)ontext. To date, only 69 pulsars have been identified with a detected pulsed radio emission below 100 MHz. A LOFAR-core LBA census and a dedicated campaign with the Nançay LOFAR station in stand-alone mode were carried out ... -
Ceria-Spiderweb Nanosheets Unlock the Energy-Storage Properties in the “Sleeping” Triplite (Mn2(PO4)F)
(American Chemical Society, 2021)Rechargeable aqueous mobile-ion batteries (RAMIBs) are attractive next-generation battery technologies. Manganese fluorophosphate (triplite), Mn2(PO4)F (MFP), and its ceria- and carbon-coated composites (i.e., MFP-CeO2 and ... -
Challenges faced by African healthcare workers during the third wave of the pandemic
(Wiley, 2022)Africa experienced the third wave of the coronavirus disease in 2019, which caused an 18% rise in cases in most parts of the continent. As of January 2022, the region had an estimated 10.4 million cumulative cases and ... -
Challenges for the adoption of ICT for diabetes selfmanagement in South Africa
(University of the Western Cape, 2019)The increasing disease burden in developing countries inhibits the provision of quality care to citizens. However, the increased availability of information communication and technology (ICT) tools makes this a viable ... -
Challenges of biobanking in South Africa to facilitate indigenous research in an environment burdened with human immunodeficiency virus, tuberculosis, and emerging non-communicable diseases
(Mary Ann Liebert, Inc., 2013)The high burden of infectious diseases and the growing problem of noncommunicable and metabolic disease syndromes in South Africa (SA) forces a more focused research approach to facilitate cutting-edge scientific growth ... -
Challenges relating to comparison of flavonoid glycosides dissolution profiles from Sutherlandia frutescens products
(De Gruyter Open, 2017)Unlike the case of conventional drug formulations, dissolution tests have hitherto not been required for herbal medicinal products commercially available in South Africa. This study investigated dissolution of the South ... -
A CHANDRA STUDY OF TEMPERATURE SUBSTRUCTURES IN INTERMEDIATE-REDSHIFT GALAXY CLUSTERS
(2009)By analyzing the gas temperature maps created from the Chandra archive data, we reveal the prevailing existence of temperature substructures on ∼ 100 h −1 70 kpc scales in the central regions of nine intermediate-redshift ... -
Changes in mangroves at their southernmost African distribution limit
(Elsevier, 2020)Mangroves in South Africa occur at one of the most southerly locations in the world, which provides a unique opportunity to study their dynamic responses to anthropogenic and natural perturbations. The exposed high-energy ... -
Changes in subcutaneous adipose tissue microRNA expression in response to exercise training in African women with obesity
(Nature Research, 2022)The mechanisms that underlie exercise-induced adaptations in adipose tissue have not been elucidated, yet, accumulating studies suggest an important role for microRNAs (miRNAs). This study aimed to investigate miRNA ... -
Characterisation of campylobacter concisus strains from South Africa using amplified fragment length polymorphism (AFLP) profiling and a genomospecies-specific polymerase chain reaction (PCR) assay: Identification of novel genomospecies and correlation with clinical data
(Academic Journals, 2013)Amplified Fragment Length Polymorphism (AFLP) profiling was used to evaluate the distribution of phenotypically indistinguishable, but genetically distinct, among Campylobacter concisus strains from South Africa. A Polymerase ... -
Characterisation of human coronavirus-NL63 nucleocapsid protein
(Academic Journals, 2012)Coronavirus N is a multifunctional protein that plays an essential role in enhancing the efficiency of virus transcription and assembly. This manuscript reports the analysis of HCoV-NL63 N protein by comparing the amino ... -
Characterisation of hydro-geochemical processes influencing groundwater quality in rural areas: A case study of Soutpansberg region, Limpopo Province, South Africa
(MDPI, 2022)Groundwater is often the main or only source of fresh water supply in arid to semi-arid rural areas owing to decreasing rainfall patterns, reduced availability of surface water and socioeconomic activities. It is important ... -
Characterisation of the arsenic resistance genes in Bacillus sp. UWC isolated from maturing fly ash acid mine drainage neutralised solids
(Academy of Science of South Africa, 2010)An arsenic resistant Bacillus sp. UWC was isolated from fly ash acid mine drainage (FA-AMD) neutralised solids. A genomic library was prepared and screened in an arsenic sensitive mutant Escherichia coli strain for the ... -
Characterising the water use and hydraulic properties of riparian tree invasions: A case study of Populus canescens in South Africa
(Water Research Commission, 2018)Invasive alien plants (IAPs) pose a serious threat to the already limited water resources in dry countries like South Africa which are facing increasing water shortages. Much of South Africa is expected to get drier in ... -
Characterization and activity test of commercial Ni/Al2O3, Cu/ZnO/Al2O3 and prepared NieCu/Al2O3 catalysts for hydrogen production from methane and methanol fuels
(Elsevier, 2013)In this study, methane and methanol steam reforming reactions over commercial Ni/Al2O3, commercial Cu/ZnO/Al2O3 and prepared NieCu/Al2O3 catalysts were investigated. Methane and methanol steam reforming reactions catalysts ... -
Characterization and Cradiovascular Effects of (13S)-9α,13α-epoxylabda-6β(19),15(14)diol dilactone, a Diterpenoid Isolated from Leonotis leonurus
(South African Chemical Institute, 2008)A new diterpenoid, (13S)-9 ,13 -epoxylabda-6 (19),15(14)diol dilactone (1), was isolated from Leonotis leonurus and the structure determined via NMR analysis. The compound causes significant changes in blood pressure of ... -
Characterization and expression analysis of heme oxygenase genes from sorghum bicolor
(SAGE Publications, 2019)Heme oxygenases (HOs) have a major role in phytochrome chromophore biosynthesis, and chromophores in turn have antioxidant properties. Plant heme oxygenases are divided into the HO1 sub-family comprising HO1, HO3, and ... -
The characterization and phylogenetic relationship of the trichoplusia ni single capsid nuclear polyhedrosis virus polyhedrin gene
(Kluwer Academic Publishers, 1999)The polyhedrin gene (polh) was identified from the Trichoplusia ni (Tni) single capsid nuclear polyhedrosis virus (SNPV). An EcoRI fragment containing the truncated polyhedrin gene was detected by hybridization with an ... -
Characterization and Toxicity of Hypoxoside Capped Silver Nanoparticles
(MDPI, 2022)The reducing potential of plant extracts in the green synthesis of nanoparticles has been associated with their phytochemicals. Although pharmacologically inactive, a norlignan diglucoside “hypoxoside” (HP) occurs in large ... -
Characterization of a highly xylose tolerant β-xylosidase isolated from high temperature horse manure compost
(BMC, 2021): There is a continued need for improved enzymes for industry. β-xylosidases are enzymes employed in a variety of industries and although many wild-type and engineered variants have been described, enzymes that are highly ...