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“#Floating a boat on the underside of a liquid” Plastic boats floating above and below a levitating liquid layer. Credit: Benjamin Apffel et al., Nature. A team of researchers from Institut Langevin and Sorbonne Université has shown that it is possible to float boats on both the top and underside of a suspended fluid. In their paper…
“#Face shields, masks with valves ineffective against COVID-19 spread: study” Although face shields block the initial forward motion of the jet, the expelled droplets move around the visor with relative ease and spread out over a large area depending on light ambient disturbances. Credit: Florida Atlantic University’s College of Engineering and Computer Science If the…
“#Effectiveness of cloth masks depends on type of covering” Schlieren images of coughs with varying degrees of face covering. Credit: Padmanabha Prasanna Simha, Indian Space Research Organisation Months into the COVID-19 pandemic, wearing a mask while out in public has become the recommended practice. However, many still question the effectiveness of this. To allay these…
“#Using physics to improve root canal efficiency” Left: Streamlines of the irrigation fluid; right: Velocity vectors at the recirculation zone next to the needle tip. Credit: Hanhui Jin Scientists used computational fluid dynamics to determine the effect of temperature on root canal cleaning efficiency. Higher temperatures can, to a point, improve cleansing, but this benefit…
“#Making masks and PPE with hydrophilic surfaces, could reduce infection risk” Drying time of a 5-nanoliter droplet as a function of the contact angle on the surface. Credit: R. Bhardwaj and A. Agrawal Since the COVID-19 virus spreads through respiratory droplets, researchers in India set out to explore how droplets deposited on face masks or…
“#Scientists investigate radiolabeling of calcium carbonate particles in vivo” Credit: Pixabay/CC0 Public Domain Сalcium carbonate particles are among the most promising bioactive compounds. However, before their use for drug delivery, their toxicity should be established, as well as their distribution inside laboratory animals. A team of investigators from ITMO University’s Department of Physics and Engineering…