Browsing Faculty of Natural Sciences by Title
Now showing items 2264-2283 of 2571
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Surveys with small optical telescopes
(Oxford academic, 2019)odern astrophysics owes its existence to small-telescope surveys dating back to the 18th century, for example Flamsteed (1725). In the 19th century, Argelander’s survey based on visual observations with small telescopes and ... -
Sustainable agriculture through the enhancement of microbial biocontrol agents: Current challenges and new perspectives
(MDPI, 2023)The future of pesticide usage in agriculture is uncertain due to its unsustainability, adverse environmental impacts, and its association in enhanced phytopathogen resistance. Hence, this situation urges the development ... -
Sustainable fuels: Lower alcohols perspective
(Wiley, 2023)In the coming years, energy sources will play a vital role in global development. Biofuels made from sustainable sources are essential for the global economy's long-term viability and the reduction of greenhouse gas ... -
Sustainable groundwater use, the capture principle, and adaptive management
(Water Research Commission, 2006)The purpose of this paper is to review the case for using ‘capture’ rather than recharge as the conceptual basis for sustainable groundwater use in South Africa. Capture refers to the sum of the increase in recharge and ... -
Sutherlandia frutescens: The meeting of science and traditional knowledge
(Mary Ann Liebert, 2013)Sutherlandia frutescens (L.) R.Br. (syn. Lessertia frutescens (L.) Goldblatt and J.C. Manning) is an indigenous medicinal plant extensively used in South Africa to treat a variety of health conditions. It is a fairly ... -
Symptom evolution following the emergence of maize streak virus
(eLife Sciences Publications, 2020)For pathogens infecting single host species evolutionary trade-offs have previously been demonstrated between pathogen-induced mortality rates and transmission rates. It remains unclear, however, how such trade-offs ... -
Symptom number and reduced preinfection training predict prolonged return to training after sars-cov-2 in athletes: Aware IV
(Lippincott, Williams & Wilkins, 2023)Symptom Number and Reduced Preinfection Training Predict Prolonged Return to Training after SARS-CoV-2 in Athletes: AWARE IV. Med. Sci. Sports Exerc., Vol. 55, No. 1, pp. 1-8, 2023. Purpose: This study aimed to ... -
Synarthrophyton papillatum sp. nov.: a new species of non-geniculate coralline algae (Rhodophyta, Corallinales, Hapalidiaceae) from South Africa and Namibia
(Elsevier, 2008)Polychaete worm tubes within the mid to lower intertidal zone along the South African west coast were frequently observed to be overgrown by a minutely papillate species of encrusting coralline algae. Analysis of the ... -
Synergies between intensity maps of hydrogen lines
(Oxford University Press, 2018)We study synergies between Hi 21cm and Hα intensity map observations, focusing on SKA1- like and SPHEREx-like surveys. We forecast how well such a combination can measure features in the angular power spectrum on the ... -
The synergistic and neuroprotective effects of alcohol–antioxidant treatment on blood–brain barrier endothelial cells
(Wiley-Blackwell, 2020)Background: Alcohol (EtOH) is reported to adversely affect one of the most crucial roles of the blood–brain barrier (BBB), the regulation of its permeability, thereby compromising the stability of the homeostatic environment ... -
Synthesis and biological evaluations of NO-donating oxa- and aza-pentacycloundecane derivatives as potential neuroprotective candidates
(MDPI, 2018)In order to utilize the neuroprotective properties of polycyclic cage compounds, and explore the NO-donating ability of nitrophenyl groups, an array of compounds was synthesized where the different nitrophenyl groups ... -
Synthesis and characterisation of a polysulfone-polyvinyl alcohol hydrogelic material
(ESG, 2016)Hydrogels are flexible materials that have found a niche in membrane science owing to their ability to absorb water without dissolving. The synthesis of polyvinyl alcohol-polysulfone hydrogel in the presence of N-hydroxy ... -
Synthesis and characterization of carbon doped TiO2 photocatalysts supported on stainless steel mesh by sol-gel method
(Korean Carbon Society, 2017)This study synthesized pure anatase carbon doped TiO2 photocatalysts supported on a stainless steel mesh using a sol-gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide (DMF)/TiCl4. The influence of the pyrolysis ... -
Synthesis and characterization of Sn‑doped TiO2 flm for antibacterial applications
(Springer, 2021)Simple sol–gel method has been exploited to deposit Sn-doped TiO2 thin flms on glass substrates. The resultant coatings were characterized by X-ray difraction (XRD), UV–visible techniques (UV–Vis), Fourier transform ... -
Synthesis and characterization of two new TiO2-containing benzothiazole-based imine composites for organic device applications
(Beilstein-Institut, 2018)The effect of the presence of titanium dioxide in two new imines, (E,E)-(butane-1,4-diyl)bis(oxybutane-4,1-diyl) bis(4- {[(benzo[d][1,3]thiazol-2-yl)methylidene]amino}benzoate) (SP1) and (E)-N-[(benzo[d][1,3]thiazol-2-y ... -
Synthesis and cytotoxic evaluation of gum arabic surface modified cadmium telluride quantum dots
(American Scientific Publishers, 2020)Water-soluble cadmium telluride (CdTe) quantum dots (QDs) were capped with gum Arabic (GA) is a non-toxic, water-soluble glycoprotein polymer commonly used in the food and pharmaceutical industries. The GA was used to ... -
Synthesis and electronic properties of Alkyl- and alkyloxy-cucuminoids
(Elsevier, 2013)Two series of p‐alkyl‐ and p‐alkoxy‐substituted curcuminoids were synthesized. The validity of the proposed structures was checked on the basis of their high resolution mass spectra as well as NMR, IR and electronic ... -
Synthesis and optimisation of IrO2 electrocatalysts by Adams fusion method for solid polymer electrolyte electrolysers
(Bentham Science Publishers, 2012)IrO2 as an anodic electrocatalyst for the oxygen evolution reaction (OER) in solid polymer electrolyte (SPE) electrolysers was synthesised by adapting the Adams fusion method. Optimisation of the IrO2 electrocatalyst was ... -
Synthesis and photovoltaics of novel 2,3,4,5-tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) donor polymer for organic solar cell
(MPDI, 2021)This report focuses on the synthesis of novel 2,3,4,5-tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) (TTT-co-P3HT) as a donor material for organic solar cells (OSCs). The properties of the synthesized TTT-co-P3HT ... -
Synthesis and reactivities of conducting hexathienylbenzene-co-poly(3-hexylthiophene) star-branched copolymer as donor material for organic photovoltaic cell
(Frontiers Media, 2022)The hexathienylbenzene-co-poly(3-hexylthiophene-2,5diyl) (HTB-co-P3HT) conducting polymer was synthesized by oxidative co-polymerization of hexathienylbenzene (HTB) and 3-hexylthiophene using iron chloride (FeCl3) as an ...