Browsing Faculty of Natural Sciences by Title
Now showing items 1805-1824 of 2571
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Planck 2018 results: VII. Isotropy and statistics of the CMB
(EDP Sciences, 2020)Analysis of the Planck 2018 data set indicates that the statistical properties of the cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using the 2013 and 2015 data ... -
Planck 2018 results: VIII. Gravitational lensing
(EDP Sciences, 2020)We present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization data. Using polarization maps filtered to account for the noise anisotropy, we ... -
Planck 2018 results: X. Constraints on inflation
(EDP Sciences, 2020)We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic microwave background (CMB) anisotropy measurements. The results are fully consistent with those reported using the data from the ... -
Planck 2018 results: XII. Galactic astrophysics using polarized dust emission
(EDP Sciences, 2020)Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky ... -
Planck intermediate results. LVII. Joint Planck LFI and HFI data processing
(ESO, 2020)We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data from the Planck Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) using ... -
Planned, ongoing and completed tuberculosis treatment trials in Brazil, Russia, India, China and South Africa: A 2019 cross-sectional descriptive analysis
(BMJ Publishing Group, 2022)Tuberculosis (TB) remains a deadly challenge globally and Brazil, Russia, India, China and South Africa (BRICS) are among the countries with the highest TB burden. The objective of this study is to identify and ... -
Plant antimicrobial peptides (pamps): Features, applications, production, expression and challenges
(MDPI, 2022)The quest for an extraordinary array of defense strategies is imperative to reduce the challenges of microbial attacks on plants and animals. Plant antimicrobial peptides (PAMPs) are a subset of antimicrobial peptides ... -
A plant-produced SARS-CoV-2 spike protein elicits heterologous immunity in hamsters
(Frontiers Media, 2023)Molecular farming of vaccines has been heralded as a cheap, safe and scalable production platform. In reality, however, differences in the plant biosynthetic machinery, compared to mammalian cells, can complicate the ... -
Plasmonic metal decorated titanium dioxide thin films for enhanced photodegradation of organic contaminants
(Elsevier, 2017)Photocatalysis using titanium dioxide as photocatalyst is an efficient way for the removal of organic contaminants in water using solar energy. In this study, thin films of copper and silver were deposited on fused ... -
Plastic ingestion by estuarine mullet Mugil cephalus (Mugilidae) in an urban harbour, KwaZulu-Natal, South Africa
(National Inquiry Services Centre (NISC), 2016)Coastal urban environments have high plastic pollution levels, and hence interactions between plastic debris and marine life are frequent. We report on plastic ingestion by mullet Mugil cephalus in Durban Harbour, ... -
Platinum overlaid PdCulr/C: an Improved Methanol Oxidation Elextrocatalyst
(ESG, 2013)A platinum overlaid PdCuIr/C (Pt-PdIrCu/C) anodic catalyst for direct methanol fuel cell was prepared by a two-step reduction method. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) results show that the ... -
Plausible explanation for the third COVID-19 wave in India and its implications
(KeAi Communications, 2023)Recently some of us used a random-walk Monte Carlo simulation approach to study the spread of COVID-19. The calculations were reasonably successful in describing secondary and tertiary waves of infection, in countries such ... -
Please call ME.N.U.4EVER: designing for “Callback” in rural Africa
(Product & Systems Internationalisation, Inc, 2011)Designers and developers are naïve about the ways impoverished people in rural Africa innovate new uses of mobile technology to circumvent access difficulties. Here, we report on the local appropriation of an USSD ‘Callback’ ... -
PM2.5 chemical composition and geographical origin of air masses in Cape Town, South Africa
(Springer Science and Business Media Deutschland GmbH, 2021)PM2.5 in the indoor and outdoor environment has been linked in epidemiology studies to the symptoms, hospital admissions and development of numerous health outcomes including death. The study was conducted during April ... -
Poisoning-tolerant metal hydride materials and their application for hydrogen separation from CO2/CO containing gas mixtures
(Elsevier, 2013)Metal hydride materials offer attractive solutions in addressing problems associated with hydrogen separation and purification from waste flue gases. However, a challenging problem is the deterioration of hydrogen charging ... -
Policy implementation for water resources protection: Assessing spatio-temporal trends of results from process-based outcomes of resource-directed measures projects in South Africa
(MDPI, 2022)Governments are continuously developing strategies for policy implementation toward water resource protection. However, little is known about the practical application of such plans to test their effectiveness in policy ... -
Policy-based network management of legacy equipment in Next Generation Networks
(Telkom, 2001)Next Generation Networks use policy-based network management and QoS protocols to provide voice services on IP networks. Large numbers of older equipment still push IP packets. We present several solutions that include ... -
Polyaniline entrapped water-dispersible 3mpa-znse quantum dots and their application for the development of an enzymatic electrochemical nanobiosensor for the detection of 17β-estradiol, an endocrine-disrupting compound
(SpringerLink, 2023)17β-estradiol is used as a growth and fertility stimulant in the agronomic sector to induce fertility and manipulate reproductive characteristics in animals. However, unintended or unregulated distribution and exposure to ... -
Polyester sulphonic acid interstitial nanocomposite platform for peroxide biosensor
(MDPI, 2009)A novel enzyme immobilization platform was prepared on a platinum disk working electrode by polymerizing aniline inside the interstitial pores of polyester sulphonic acid sodium salt (PESA). Scanning electron microscopy ... -
Polyethylene glycol (peg-400): An efficient one-pot green synthesis and anti-viral activity of novel α-diaminophosphonates
(Taylor & Francis Online, 2019)An efficient and eco-friendly protocol has been accomplished for a series of novel a-diaminophosphonates by a one-pot, three-component system via Kabachnik-Fields reaction of 4,40 -methylenedianiline, a variety of ...