Health
“COVID-19 virus survives on the surface inside the thin film”
The COVID-19 virus survives on the surface by adhering to a thin film, according to research by IIT Bombay researchers. Coronavirus It lasts for hours or days on a solid surface under ambient conditions.
The study, published in the journal Physics of Fluids, attributed the long survival of the novel coronavirus on the surface to the slow evaporation of the nanometer-thin film remaining after the evaporation of bulk droplets.
The ability to predict the survival of new coronaviruses on various surfaces COVID-19 (new coronavirus infection) (# If there is no character limit, add parentheses when it first appears, The researcher said.
Typical respiratory droplets dry in seconds, but SARS-CoV-2 virus has a survival time of several hours on various surfaces in recent experiments.
Researchers have suggested that this discrepancy suggests that there is an order of magnitude difference in time between droplet drying and survival time. Surface COVID-19 virus..
Researchers have explained that the Van der Waals forces in London allow nanometer-thick liquid films to adhere to the surface and allow the COVID-19 virus to survive for hours.
Van der Waals forces include attractive and repulsive forces between atoms, molecules, and surfaces, and other intermolecular forces.
“Our model of thin film transport shows that the survival or drying time of thin films on the surface is on the order of hours and days, similar to that observed in viral titer measurements.” Said professor Amit Agrawal. Indian Institute of Technology (IIT) in Bombay.
“It captures a relatively long lifespan in plastics and glass compared to metals,” Agrawal said.
Titer is the lowest concentration of virus that still infects cells.
Nanometer film is supposed to be like pancakes deposited on the surface. Researchers briefly investigated changes in contact angle and drying time as a function of surface type.
“Our biggest surprise was that the drying time for this nanometer film was on the order of hours,” said Professor Rajneesh Bhardwaj of IIT Bombay.
“This suggests that the surface is not completely dry, and the slowly evaporating nanometer film, Survival of coronavirus“Bhardwaj said.
Since the longer survival of Virus In response to the increased likelihood of infection, researchers said it would be desirable to disinfect frequently touched surfaces such as door handles and mobile devices, as well as in hospitals and other prone areas.
“We also recommend heating the surface, as it can help evaporate the nanometer membrane and destroy the virus, even at high temperatures for a short period of time above the ambient temperature,” Bhardwaj added. I did.
(There is input from the institution)
Release date: November 25, 2020 1:27 pm
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