Plasma treatments quickly kill coronavirus on surfaces: Stud
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Researchers from UCLA believe using plasma could promise a significant breakthrough in the fight against the spread of COVID-19.

In Physics of Fluids, by AIP Publishing, modeling conducted in June showed strains of the novel coronavirus on surfaces like metal, leather, and plastic were killed in as little as 30 seconds of treatment with argon-fed, cold atmospheric plasma.

The researchers used an atmospheric pressure plasma jet they built with a 3D printer to spray surfaces that were treated with SARS-CoV-2 cultures. The surfaces included plastic, metal, cardboard, and basketball, football, and baseball leather.

The spray using plasma fed by argon killed all the coronavirus on the six surfaces in less than three minutes, and most of the virus was destroyed after 30 seconds. Additional testing showed the virus was destroyed in similar times on cotton from face masks.

The novel coronavirus can remain infectious on surfaces for several hours. Author Richard E. Wirz said the findings show great potential for the use of plasma in halting the virus's transmission cycle.

Plasma is one of the four basic states of matter and can be created by heating a neutral gas or subjecting it to a strong electromagnetic field. A relatively new technology, cold atmospheric plasma is an ionized, near-room-temperature gas that has proven effective in cancer treatments, wound healing, dentistry, and other medical applications.

The authors ran a similar coronavirus test with helium-fed plasma, but the helium was not effective, even with treatments up to five minutes. The authors believe this was due to lower rates of reactive oxygen and reactive nitrogen when using helium-fed gas, compared to argon.

The researchers hope the benefits of plasma, like those shown in this study, can be made available to people around the world.

Source: https://publishing.aip.org/publications/latest-content/plasma-treatments-quickly-kill-coronavirus-on-surfaces/
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