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  2. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.

  3. N95 respirator - Wikipedia

    en.wikipedia.org/wiki/N95_respirator

    An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.

  4. Code of Federal Regulations - Wikipedia

    en.wikipedia.org/wiki/Code_of_Federal_Regulations

    A few volumes of the CFR at a law library (titles 12–26) In the law of the United States, the Code of Federal Regulations (CFR) is the codification of the general and permanent regulations promulgated by the executive departments and agencies of the federal government of the United States. The CFR is divided into 50 titles that represent ...

  5. Range safety - Wikipedia

    en.wikipedia.org/wiki/Range_safety

    SpaceX expected the vehicle to be given the destruct command at the point the vehicle lost thrust vector control at T+1:30, but this was done much later. [55] Upon activation, the explosive ordnance detonated as expected, but destruction was delayed; [ 56 ] the vehicle was only destroyed at T+3:59, [ 36 ] 40 seconds after the AFTS was estimated ...

  6. Arthur Kill Vertical Lift Bridge - Wikipedia

    en.wikipedia.org/wiki/Arthur_Kill_Vertical_Lift...

    After the bridge opened in 1959 upon having replaced the Arthur Kill Bridge, [6] rail traffic declined due to loss of manufacturing facilities on Staten Island. Bethlehem Steel closed in 1960, U.S. Gypsum in 1972, U.S. Lines-Howland Hook Marine Terminal in 1986, and Procter and Gamble in 1991.

  7. Turtle farming - Wikipedia

    en.wikipedia.org/wiki/Turtle_farming

    In 2004, 72 turtle farms were licensed by the State of Louisiana. [30] The industry is said to have started "70-some years" ago (i.e., in the 1930s) with farmers collecting eggs laid by wild turtles, getting them to hatch, and selling the hatchlings as pets.

  8. Ibadism - Wikipedia

    en.wikipedia.org/wiki/Ibadism

    Ibadi Islam (Arabic: الإباضية, romanized: al-ʾIbāḍiyya, Arabic pronunciation: [alʔibaːˈdˤijja]) is a school of Islam concentrated in Oman established from within the Kharijites. [3]