Browsing Research Articles (Chemistry) by Title
Now showing items 161-180 of 221
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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 ... -
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 ... -
Polysaccharides from the South African medicinal plant Artemisia afra: Structure and activity studies
(Elsevier, 2018)Artemisia afra (Jacq. Ex. Willd), is an indigenous plant in South Africa and other parts of the African continent, where it is used as traditional medicine mostly for respiratory conditions. The objective of this study was ... -
Potential broad spectrum inhibitors of the coronavirus 3CLpro: a virtual screening and structure-based drug design study
(MDPI, 2015)Human coronaviruses represent a significant disease burden; however, there is currently no antiviral strategy to combat infection. The outbreak of severe acute respiratory syndrome (SARS) in 2003 and Middle East respiratory ... -
Potential broad spectrum inhibitors of the coronavirus 3CLpro: A virtual screening and structure-based drug design study
(MDPI, 2015)Human coronaviruses represent a significant disease burden; however, there is currently no antiviral strategy to combat infection. The outbreak of severe acute respiratory syndrome (SARS) in 2003 and Middle East respiratory ... -
The potential of leucosidea sericea against propionibacterium acnes
(Elsevier, 2014)The present study reports on the potential of Leucosidea sericea addressing acne vulgaris. Four known compounds namely phytol acetate, triacontanol, phytol and alpha kosin and one new compound namely, (E)-3,7,11,15-tetra ... -
The production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift reactor
(Elsevier, 2016)Hydrogen as an energy carrier has the potential to decarbonize the energy sector. This work presents the application of a palladium-silver (PdeAg) membrane-based reactor. The membrane reactor which is made from PdeAg ... -
Progress on perovskite materials for energy application
(Elsevier, 2021)Energy underlies the human development and welfare. Today energy depends on combustion of fossil fuels (coal, natural gas, oil) sources. These sources have not only led to severe environmental issues because it emits greenhouse ... -
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 ... -
Quantifying the contribution of riparian total evaporation to streamflow transmission losses: Preliminary investigations along the Groot Letaba river
(Elsevier, 2019-11-08)The Groot Letaba River, situated in the semi-arid north-eastern region of South Africa is an example of a river system in which the uncertainty associated with transmission losses (TL) has limited the effective management ... -
Quantum dot nanotoxicity investigations using human lung cells and toxor electrochemical enzyme assay methodology
(American Chemical Society, 2017)Recent studies have suggested that certain nanomaterials can interfere with optically based cytotoxicity assays resulting in underestimations of nanomaterial toxicity. As a result there has been growing interest in the ... -
A quarter century of marine biodiscovery in Algoa bay, South Africa
(Journal of Natural Products, 2023)Algoa Bay, the largest crenulate bay on the south-eastern coast of South Africa, is currently one of the most well-studied marine ecosystems in southern Africa. A plethora of endemic marine invertebrates inhabits the benthic ... -
Recent advances in the detection of interferon‑gamma as a TB biomarker
(Springer, 2021)Tuberculosis (TB) is one of the main infectious diseases worldwide and accounts for many deaths. It is caused by Mycobacterium tuberculosis usually afecting the lungs of patients. Early diagnosis and treatment are essential ... -
Removal of pharmaceutical residues from water and wastewater using dielectric barrier discharge methods—A review
(MPDI, 2021)Persistent pharmaceutical pollutants (PPPs) have been identified as potential endocrine disruptors that mimic growth hormones when consumed at nanogram per litre to microgram per litre concentrations. Their occurrence in ... -
A review of combined advanced oxidation technologies for the removal of organic pollutants from water
(Springer Verlag, 2014)Water pollution through natural and anthropogenic activities has become a global problem causing short-and long-term impact on human and ecosystems. Substantial quantity of individual or mixtures of organic pollutants enter ... -
A review of pharmaceuticals and endocrine-disrupting compounds: sources, effects, removal, and detections
(Springer, 2013)There are growing concerns about the increasing trends of emerging micropollutants in the environment due to their potential negative impacts on natural ecosystems and humans. This has attracted attention from both ... -
A review of the green synthesis of zno nanoparticles utilising Southern African indigenous medicinal plants
(MDPI, 2022)Metal oxide nanoparticles (NPs), such as zinc oxide (ZnO), have been researched extensively for applications in biotechnology, photovoltaics, photocatalysis, sensors, cosmetics, and pharmaceuticals due to their unique ... -
Role of the methoxy group in product formation via TiCl4 promoted 4-phenyldioxolane isomerizations
(ARKAT USA INC, 2010)The product distribution obtained from the TiCl4 initiated intramolecular isomerizations of 4- methoxyphenyl- and trimethoxyphenyldioxolanes at -78 oC, -30 oC and 0 oC provided insights into the important regiochemical ...