Tests on the ground found that it was possible for the fuel cell to work, even with low oxygen pressure.

The fifteen pounds per square inch around you includes three pounds of oxygen pressure.

He keeps his oxygen partial pressure so low at night.

But at night, when you're sleeping anyway, you can lower the oxygen partial pressure.

If the oxygen pressure got too low, the astronauts could be asphyxiated.

That meant that the oxygen pressure had fallen to zero in the main line.

Materials are easier to ignite and burn more readily as oxygen pressure or concentration increase.

Together they tested the suit's radio, oxygen pressure, heater.

The air in Tibet is much thinner, with oxygen partial pressure being 35% to 40% below that at sea level.

This can cause the brain to malfunction because of low oxygen pressure, he said, so that the person starts breathing water and drowning.