صدى البلد: دراسة تحذر ارتداء القناع المستعمل أسوأ من عدمه elbalad.news - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from elbalad.news Daily Mail and Mail on Sunday newspapers.
Researchers looked at the protectiveness of three-layer surgical masks against inhaling coronavirus-infected droplets
They found that air, which contain tiny aerosols, don t enter the mouth and nose at specific points, but through the entire mask surface at low speeds
A computer model found that, when new, surgical masks can filter 65% of droplets and, when used, they can filter just 25%
The team believes this is because the shape of masks can change with each use, and that wearing a used mask can be less effective than no mask at all
Credit: Jinxiang Xi
WASHINGTON, December 15, 2020 Even though it has been widely known that wearing a face mask will help mitigate the community spread of COVID-19, less is known regarding the specific effectiveness of masks in reducing the viral load in the respiratory tracts of those wearing them.
In
Physics of Fluids, by AIP Publishing, researchers from the University of Massachusetts Lowell and California Baptist University examined the effect of wearing a three-layer surgical mask on inspiratory airflows and the mask s effects on the inhalation and deposition of ambient particles in the upper respiratory airways. It is natural to think that wearing a mask, no matter new or old, should always be better than nothing. Our results show that this belief is only true for particles larger than 5 micrometers, but not for fine particles smaller than 2.5 micrometers, said author Jinxiang Xi.
Scientists have used a computational model to further our knowledge of how face masks impact airflow. In a new study, published this month in the journal
Physics of Fluids, from the American Institute of Physics, a team of scientists from the University of Massachusetts Lowell and California Baptist University explains how not all masks protect the same from COVID-19 transmission. They conclude that old masks may be worse than not wearing a mask at all. These findings will likely influence the guidance on mask-wearing and potentially mask design.
Pressure and particle motions with and without a mask. Image Credit: Jinxiang Xi
The Martha s Vineyard Times
âYou can do anything you put your mind toâ
Athlete Noelle Lambert, who lost leg in Vineyard accident, eyes 2021 Paralympics.
After losing her leg in a moped accident on-Island in 2016, multisport athlete Noelle Lambert is eying the 2021 Paralympics in Japan. â Courtesy Noelle Lambert
In the summer of 2016, multisport athlete Noelle Lambert lost her leg in a moped accident on-Island. Now she is looking to compete in the 2021 Paralympics in Tokyo, Japan.Â
After waking up in the hospital with only one leg after her accident, Lambert told The Times, she was convinced she would never walk again, let alone play competitive sports.