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  2. Latent hypoxia - Wikipedia

    en.wikipedia.org/wiki/Latent_hypoxia

    This is about 4% oxygen in the lungs and 45% oxygen saturation of the arterial blood. At 30 msw (4 bar), 2% by volume oxygen in the lung gas gives a P O 2 of 60 millimetres of mercury (80 mbar). At 10 msw (2 bar), for the same 2% oxygen, the P O 2 would be 30 millimetres of mercury (40 mbar), i.e. marginal. At the surface the same 2% oxygen ...

  3. Decompression practice - Wikipedia

    en.wikipedia.org/wiki/Decompression_practice

    In open circuit scuba the upper limit for oxygen partial pressure is generally accepted as 1.6 bar, [40] equivalent to a depth of 6 msw (metres of sea water), but in-water and surface decompression at higher partial pressures is routinely used in surface supplied diving operation, both by the military and civilian contractors, as the ...

  4. Physiology of decompression - Wikipedia

    en.wikipedia.org/wiki/Physiology_of_decompression

    The sum of these partial pressures (water, oxygen, carbon dioxide and nitrogen) comes to roughly 900 mbar (675 mmHg), which is some 113 mbar (85 mmHg) less than the total pressure of the respiratory gas. This is a significant saturation deficit, and it provides a buffer against supersaturation and a driving force for dissolving bubbles. [26]

  5. Water loss is a growing problem, especially in shrinking US ...

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    Some places in Chicago lose 40% of their treated water to leaks. Some systems in Georgia lose as much as 80%. In Jackson, Mississippi, the water system failed for more than 100,000 people in 2022 ...

  6. Cote: ‘No comfort in the playoffs’: Pressure shifts to ...

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  7. Limiting oxygen concentration - Wikipedia

    en.wikipedia.org/wiki/Limiting_oxygen_concentration

    The limiting oxygen concentration (LOC), [1] also known as the minimum oxygen concentration (MOC), [2] is defined as the limiting concentration of oxygen below which combustion is not possible, independent of the concentration of fuel. It is expressed in units of volume percent of oxygen. The LOC varies with pressure and temperature.

  8. Hypoxia (environmental) - Wikipedia

    en.wikipedia.org/wiki/Hypoxia_(environmental)

    Many organisms require hypoxic conditions. Oxygen is poisonous to anaerobic bacteria for example. [3] Oxygen depletion is typically expressed as a percentage of the oxygen that would dissolve in the water at the prevailing temperature and salinity. A system with low concentration—in the range between 1 and 30% saturation—is called hypoxic ...

  9. Chicago’s Buckingham Fountain closed after pool water dyed red in apparent pro-Palestine demonstration Deanese Williams-Harris, Rebecca Johnson, Claire Malon, Chicago Tribune Updated June 22 ...