Browsing Faculty of Natural Sciences by Title
Now showing items 1913-1932 of 2571
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Provenance of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U–Pb detrital zircon geochronology, Hf and Nd model ages, and geochemical data
(Elsevier, 2021)New isotopic and geochemical data for the Paleo- Meso- and Neoproterozoic metasedimentary cover of the southern Dom Feliciano Belt (Brasiliano/Pan-African) are presented and evaluated combined with published information. ... -
Provision of syndromic treatment of sexually transmitted infections by community pharmacists: a potentially underutilized HIV prevention strategy
(Lippincott, Williams & Wilkins, 2003)Background: Sexually transmitted infections (STIs) are known risk factors for HIV infection. Goal: The goal of this study was to assess the current and potential future role that community pharmacists in Western Cape, South ... -
Proximate determinants of fertility in Ethiopia: comparative analysis of the 2005 and 2011 DHS
(SAGE Publications, 2017)Fertility is one of the elements in population dynamics that makes a significant contribution towards changing population size and structure over time. In Ethiopia, for the last 10 years the total fertility rate (TFR) has ... -
Pseudocapacitive effects of multi-walled carbon nanotubes-functionalised spinel copper manganese oxide
(MDPI, 2022)Spinel copper manganese oxide nanoparticles combined with acid-treated multi-walled carbon nanotubes (CuMn2O4/MWCNTs) were used in the development of electrodes for pseudocapacitor applications. The CuMn2O4/MWCNTs ... -
PSRJ1910–5959A: A rare gravitational laboratory for testing white dwarf models
(EDP Sciences, 2023)Context. PSR J1910-5959A is a binary millisecond pulsar in a 0.837 day circular orbit around a helium white dwarf (HeWD) companion. The position of this pulsar is 6.3 arcmin (∼74 core radii) away from the optical centre ... -
Psychosocial reintegration following traumatic spinal cord injury in South Africa: The influence of employment, injury characteristics and living situation
(The Journal of Spinal Cord Medicine,, 2022)1Department of Health and Rehabilitation Sciences, Division of Physiotherapy, Stellenbosch University, Cape Town, South Africa, 2Department of Physiotherapy, University of the Western Cape, Cape Town, South Africa Objectives: ... -
Pt decorated amorphous RuIr alloys as high efficiency electrocatalyst for methanol oxidation
(The Electrochemical Society, 2012)This study focuses primarily on improving the utilization and activity of anodic catalysts for methanol electro-oxidation. The Direct Methanol Fuel Cell (DMFC) anodic catalyst, a carbon supported Pt decorated amorphous ... -
Pt-Sn/C as a possible methanol-tolerant cathode catalyst for DMFC
(Springer Verlag, 2013)An effective method was developed for preparing highly dispersed nano-sized Pt–Sn/C electrocatalyst synthesised by a modified polyol reduction method. From XRD patterns, the Pt–Sn/C peaks shifted slightly to lower 2θ angles ... -
Pulmonary effects and disposition of luteolin and Artemisia afra extracts in isolated perfused lungs
(Elsevier, 2013)ETHNOPHARMACOLOGICAL RELEVANCE: Artemisia afra (Asteraceae) is a traditional medicinal plant frequently used in steam inhalation form to treat respiratory conditions. AIM OF THE STUDY: Quantify luteolin content in Artemisia ... -
Pulsar scintillation studies with LOFAR I. The census
(Hans Publishers, 2022)Interstellar scintillation (ISS) of pulsar emission can be used both as a probe of the ionized interstellar medium (IISM) and cause corruptions in pulsar timing experiments. Of particular interest are so-called scintillation ... -
Pulsars with NenuFAR: Backend and pipelines
(EDP Sciences, 2021)Context. NenuFAR (New extension in Nançay upgrading LOFAR) is a new radio telescope developed and built on the site of the Nançay Radio Observatory. It is designed to observe the largely unexplored frequency window from ... -
Pulsations and eclipse-time analysis of HWVir
(Oxford University Press, 2018)We analysed recent K2 data of the short-period eclipsing binary systemHWVir,which consists of a hot subdwarf-B type primary with an M-dwarf companion.We determined the mid-times of eclipses, calculated O–C diagrams, and ... -
Purification, crystallization and preliminary X-ray diffraction analysis of thermostable nitrile hydratase: research letter
(Academy of Science of South Africa (ASSAf), 2004)Microbial nitrile hydratases are important industrial enzymes that catalyse the conversion of nitriles to the corresponding amides. Bacillus strain RAPc8 nitrile hydratase has recently been cloned and functionally ... -
PZQ Therapy: How close are we in the development of effective alternative anti-schistosomal drugs?
(Bentham Science Publishers, 2019)Today schistosomiasis, caused mainly by the three major schistosome species (S. mansoni, S. haematobium and S. japonicum), has for many decades and still continues to be on a rapid and swift rise globally, claiming ... -
The Q/U imaging experiment instrument
(The American Astronomical Society, 2013)The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the cosmic microwave background, targeting the imprint of inflationary gravitational waves at large angular scales(∼1◦). Between 2008 October and ... -
Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126
(Elsevier, 2023)The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states ... -
A qualitative meta-synthesis of facilitators and barriers to tuberculosis diagnosis and treatment in Nigeria
(Springer Nature, 2021): Despite progress in tuberculosis (TB) control globally, TB continues to be a leading cause of death from infectious diseases, claiming 1.2 million lives in 2018; 214,000 of these deaths were due to drug resistant strains. ... -
A qualitative study of referring agents’ perceptions of access barriers to inpatient substance abuse treatment centres in the Western Cape
(BioMed Central, 2015)Background: Despite empirical support for the individual and public health benefits of treating substance use disorders (SUDs) , access to these services is impeded by several barriers. Although many studies on access ... -
Qualitatively different ways of unpacking visual representations when teaching intermolecular forces in upper secondary school
(Wiley, 2021)Since visual representations play a particularly important role in the teaching and learning of chemistry, the ex-ploration described in this article focuses on them. This is an explorative study of the qualitatively ... -
Quantification and characterisation of microplastics ingested by selected juvenile fish species associated with mangroves in KwaZulu- Natal, South Africa
(Elsevier, 2020)Though the number studies on microplastic ingestion by fish is growing, data on fish species charac- teristic of the South African coastline are scarce. This study quantified and characterised (physically and chemically) ...