Word: oxygenated
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Dates: during 1930-1939
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Northwest chose the light-weight (4 oz.), nose-gripping oxygen masks invented by grey-haired Dr. Walter Meredith Boothby and two other doctors of the Mayo Clinic and already used to cure and prevent seasickness (TIME, Jan. 16). Last week, after demonstrating the oxygen sys tem in an overweather flight of four hours and 50 minutes from Minneapolis to Boston with nine passengers, Chief Pilot Mai Freeburg showed Northwest's new flying wrinkle to Boston and Manhattan scientists and newsmen...
Passengers with hangovers became clear headed when they began breathing a mix ture of 20% oxygen, 80% nitrogen. Others became violently airsick when they took off their masks, quickly recovered when they put them on again. All showed normal pulse and respiration rates, were able to eat comfortably without taking off the masks...
Before the plane began descending at 1,000 feet per minute (normal airline descent rate 300 f.p.m.), the passengers' masks were piped to a mixture of 20% oxygen, 80% helium and they experienced no ear pains. Passengers were told that ear plugging was due to failure of the ears to equalize inner and outer pressure in descent, that highly diffusible helium spreads more swiftly than air through the passages from nose to ears, keeps pressure reasonably even...
...studies on the mechanism of blood supply to muscles, showing that a muscle's capillaries work in squads or shifts, most of them remaining closed when the muscle is resting. His great work on respiration, published in 1916, was on the mechanism of gas exchange (carbon dioxide for oxygen) in lungs. Last week he pointed out that animals make structural adaptations to the available oxygen supply as to any other environmental circumstance. Frogs and toads living in oxygen-deficient waters grow abnormally large, those in oxygen-abundant waters abnormally small. South American lungfish develop extra gills when they...
...Krogh pointed out that the oxygen intake among animals varies enormously according to bodily activity. Per kilogram of body weight, the sluggish mussel uses only 22 cubic centimetres of oxygen per minute while the busy bee consumes 17,000 cc. Man, whose activity rate varies considerably, takes...