LO2 - اکسیژن مایع

[Computex]

سلام. ضمن تائید فرمایشات دوست خوبمون جناب (ic3_drag0n) پیشنهاد می کنم این مقاله رو در سایت معتبر howstuffworks.com بخوانید. (لینک : http://science.howstuffworks.com/question493.htm )

در قسمتی از این مقاله برای عوارض تنفس اکسیژن خالص آمده:

A highly reactive form of the oxygen molecule, called the oxygen free radical, which destroys proteins and membranes in the epithelial cells, probably causes this damage. In humans breathing 100 percent oxygen at normal pressure, here's what happens:

• Fluid accumulates in the lungs.
• Gas flow across the alveoli slows down, meaning that the person has to breathe more to get enough oxygen.
• Chest pains occur during deep breathing.
• The total volume of exchangeable air in the lung decreases by 17 percent.
• Mucus plugs local areas of collapsed alveoli -- a condition called atelectasis. The oxygen trapped in the plugged alveoli gets absorbed into the blood, no gas is left to keep the plugged alveoli inflated, and they collapse. Mucus plugs are normal, but they are cleared by coughing. If alveoli become plugged while breathing air, the nitrogen trapped in the alveoli keeps them inflated.

البته در ادامه آمده که در شرایط خاص تنفس اکسیژن خالص اون هم به مدت دو هفته وجود داشته اما در چه شرایطی؟

The astronauts in the Gemini and Apollo programs breathed 100 percent oxygen at reduced pressure for up to two weeks with no problems

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