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Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).
Killing coronavirus: U.S. Environmental Protection Agency has released a list of disinfectants and wipes to protect against spread of the coronavirus.
An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics , and at reducing or eliminating second-hand tobacco smoke .
Sonication machines for record cleaning at Swiss National Sound Archives. Sonication is the mechanism used in ultrasonic cleaning—loosening particles adhering to surfaces. In addition to laboratory science applications, sonicating baths have applications including cleaning objects such as spectacles and jewelry.
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Corsi–Rosenthal Boxes have been used in schools to reduce risk of COVID-19 transmission, [29] [30] [31] sometimes also functioning as a STEM lesson with students learning about the science of air filtration and constructing the boxes themselves. [32] At the university level, engineering students are also running tests on the units. [33]
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