What happens if fog comes on roads? First of all, visibility falls down, so the risk for a car accident increases, especially on highways. Scientists from Central Aerological Observatory have constructed a special electrostatic filter, which eliminates the fog at a distance up to 10 meters. The filter looks like a metal frame with a precipitation electrode - thin metal plates, separated with high-voltage isolators. It also has a corona-forming electrode of a twisted wire. The unit is grounded with a metal net.
Current fog dissipation methods are good only for cold fogs, which appear at temperatures below zero. Warm fogs are a bit worse: they are thermodynamically stable, and it requires much energy to dissipate them. There is a good method of electrostatic fog precipitation, used on factories: fog particles caught into electrostatic field between two electrodes - corona-forming and precipitation - acquire electrical charge (because of ionised air) and start moving towards the precipitation electrode. They stick to it and lose their charge.
The scientists tried to apply this method to open air. For testing purposes they created fog and then dissipated it under various weather conditions - on a sunny day with gradual temperature increase, or cloudy day with no temperature change, or in cold evenings. During these experiments, the scientists found the best electrodes shape and corona-forming voltage. So, electrostatic method takes 7 minutes for fog to disappear, while under natural conditions it takes nearly an hour.
Irina Sigunova | alfa
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Thomas Heine, Professor of Theoretical Chemistry at TU Dresden, together with his team, first predicted a topological 2D polymer in 2019. Only one year later, an international team led by Italian researchers was able to synthesize these materials and experimentally prove their topological properties. For the renowned journal Nature Materials, this was the occasion to invite Thomas Heine to a News and Views article, which was published this week. Under the title "Making 2D Topological Polymers a reality" Prof. Heine describes how his theory became a reality.
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Scientists took a leukocyte as the blueprint and developed a microrobot that has the size, shape and moving capabilities of a white blood cell. Simulating a blood vessel in a laboratory setting, they succeeded in magnetically navigating the ball-shaped microroller through this dynamic and dense environment. The drug-delivery vehicle withstood the simulated blood flow, pushing the developments in targeted drug delivery a step further: inside the body, there is no better access route to all tissues and organs than the circulatory system. A robot that could actually travel through this finely woven web would revolutionize the minimally-invasive treatment of illnesses.
A team of scientists from the Max Planck Institute for Intelligent Systems (MPI-IS) in Stuttgart invented a tiny microrobot that resembles a white blood cell...
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