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Peter Tsai (蔡秉燚; born February 6, 1952) is a Taiwanese-American inventor and material scientist who is best known for inventing and patenting improved meltblown filtration manufacturing techniques, used in respirators (like N95 respirators, which is a 1995 NIOSH standard made to address the shortcomings of USBM standards).
He is the inventor of the Wu mask, which is the forerunner of today's N95 respirator. Wu was the first medical student of Chinese descent to study at the University of Cambridge. [2] He was also the first Malayan nominated for the Nobel Prize in Physiology or Medicine, in 1935. [3]
Distinctive styles of masks began to emerge in pre-Hispanic America about 1200 BC, although there is evidence of far older mask forms. In the Andes, masks were used to dress the faces of the dead. These were originally made of fabric, but later burial masks were sometimes made of beaten copper or gold, and occasionally of clay.
Peter Tsai, 68, who invented the technology for the N95 mask originally for construction workers, was called out of retirement to help during the coronavirus pandemic.
A surgical mask serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices (i.e. nose and mouth).Most commonly used surgical masks are designed to only trap respiratory droplets, and therefore do not filter or block fine airborne particles that are smaller than the designed filtration ratings, which may be transmitted by coughs, sneezes, unintentional ...
A World War I British P Helmet, c. 1915 Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo) Indian muleteers and mule wearing gas masks, France, February 21, 1940 A Polish SzM-41M KF gas mask, used from the 1950s through to the 1980s
Irish physicist John Tyndall took Stenhouse's mask, added a filter of cotton wool saturated with lime, glycerin, and charcoal, and in 1871 invented a 'fireman's respirator', a hood that filtered smoke and gas from air, which he exhibited at a meeting of the Royal Society in London in 1874. [9]
Cloth masks are also reusable, and the CDC recommends that you wash your cloth mask as soon as it becomes dirty either by hand or in the washing machine. One time cost: $4.00 Surgical