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  2. Liquid breathing - Wikipedia

    en.wikipedia.org/wiki/Liquid_breathing

    Total liquid ventilation, however, has difficulty moving enough liquid to carry away CO 2, because no matter how great the total pressure is, the amount of partial CO 2 gas pressure available to dissolve CO 2 into the breathing liquid can never be much more than the pressure at which CO 2 exists in the blood (about 40 mm of mercury ). [50]

  3. Non-stick surface - Wikipedia

    en.wikipedia.org/wiki/Non-stick_surface

    Not all non-stick pans use Teflon; other non-stick coatings have become available. For example, a mixture of titanium and ceramic can be sandblasted onto the pan surface, and then fired at 2,000 °C (3,630 °F) to produce a non-stick ceramic coating. [19] Ceramic nonstick pans use a finish of silica (silicon dioxide) to prevent sticking.

  4. Bluing (steel) - Wikipedia

    en.wikipedia.org/wiki/Bluing_(steel)

    Bluing is also used in seasoning carbon steel cookware, to render it relatively rust-proof and non-stick. In this case cooking oil, rather than gun oil, acts to displace water and prevent rust. Premium fencing blades are often offered with a blued finish.

  5. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    Liquid oxygen is the liquid form of molecular oxygen. It has a density of 1.141 kilograms per litre (71.2 lb/cu ft), slightly denser than liquid water, and is cryogenic with a freezing point of 54.36 K (−218.79 °C; −361.82 °F) and a boiling point of 90.19 K (−182.96 °C; −297.33 °F) at 1 bar (15 psi).

  6. Mechanical filter (respirator) - Wikipedia

    en.wikipedia.org/wiki/Mechanical_filter_(respirator)

    Filtering half mask, reusable elastomeric respirator with pink replaceable pancake filters and grey exhalation valve Full-face elastomeric respirators seal better. [1] Mechanical filters, a part of particulate respirators, are a class of filter for air-purifying respirators that mechanically stops particulates from reaching the wearer's nose ...

  7. Face shield vs. face mask: Which is better? - AOL

    www.aol.com/article/lifestyle/2020/07/14/face...

    Masks have more containment of the mouth and nose than shields do, but wearing a mask isn’t possible for everyone. “For those who cannot tolerate a mask, a shield could be better.

  8. Thermite - Wikipedia

    en.wikipedia.org/wiki/Thermite

    Oxygen-balanced iron thermite 2Al + Fe 2 O 3 has theoretical maximum density of 4.175 g/cm 3 an adiabatic burn temperature of 3135 K or 2862 °C or 5183 °F (with phase transitions included, limited by iron, which boils at 3135 K), the aluminum oxide is (briefly) molten and the produced iron is mostly liquid with part of it being in gaseous ...

  9. 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.

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