Health
Cotton face mask that can be disinfected in just 60 minutes of sunlight
among COVID-19 (new coronavirus infection) (# If there is no character limit, add parentheses when it first appears Pandemic researchers have developed a special type of cotton face mask that kills up to 99.9999 percent of bacteria and viruses within 60 minutes of exposure to sunlight.
Studies have shown that the outbreak of the COVID-19 pandemic has made many people accustomed to wearing cotton face masks in public places. However, viruses and bacteria attached to the mask can move to other places when the wearer removes or touches the mask.
“Face masks made of various fabric materials can filter nanoscale aerosol particles, such as those released by coughing and sneezing, which may help reduce the spread of diseases such as: There is. COVID-19 (new coronavirus infection) (# If there is no character limit, add parentheses when it first appears“A university researcher said Davis, California, USA.
However, these live bacteria and viruses on the surface of the mask can still be contagious.
Face mask that can be disinfected even when exposed to sunlight
The research team wants to develop a new cotton fabric that releases reactive oxygen species (ROS) when exposed to sunlight, is washable, reusable, safe for the wearer, and kills microorganisms on the surface of the fabric. I was thinking.
Second, one can disinfect the cloth mask at lunch outside in the sun or spend a long time in office or building lighting, which is much weaker than sunlight.
Researchers Antibacterial agent Fabric by attaching a chain of positively charged 2-diethylaminoethyl chloride (DEAE-Cl) to ordinary cotton.
The modified cotton was then stained with a solution of a negatively charged photosensitizer (a compound that releases ROS when exposed to light) attached to the DEAE chain due to strong electrostatic interactions.
A fabric made of a dye called rose bengal killed 99.9999% of bacteria
The team found that a fabric made of a dye called rose bengal as a photosensitizer killed 99.9999 percent. Bacteria It was added to the fabric within 60 minutes of exposure to sunlight, and within 30 minutes 99.9999 percent of T7 bacteriophage (a virus believed to be more resistant to ROS than some coronaviruses) was inactivated. It was.
Further testing has shown that the material can be hand-washed at least 10 times and always exposed to sunlight for at least 7 days without losing the material. Antibacterial activity..
The fabric shows the potential to make reusable antibacterial / antiviral cloth masks and protective clothing, the researchers said.
The number of COVID-19 cases in India increased to 86,83,916
In India, 47,905 infections increased in one day. Country COVID-19 Case Road To 86,83,916, while the number of people recovering from illness surged to 80,66,501.
Includes 45,560 from Maharashtra, 11,453 from Karnataka, 11,415 from Tamil Nadu, 7,452 from West Bengal, 7,281 from Uttar Pradesh, 7,228 from Delhi, 6,828 from Andhra Pradesh, 4,389. A total of 1,28,121 deaths have been reported so far. 3,776 from Punjab and from Gujarat.
(With input from the agency)
Release date: November 12, 2020 15:05
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