5. 6 FIGURE 5.3: TOLERABLE PRESSURES OF OXYGEN-INERT GAS MIXTURES FOR HUMAN BREATHING 760 700 600 80000 tJ, N e I 500 '- 60000 z QJ 400 QJ ,... ,... ;::l ;::l ~ rJ) 300 40000 rJ) QJ QJ ,... ,... "' "' 200 20000 100 0 ---~-----....__...__.,___..____ 0 10 20 30 40 50 60 70 80 90 100 Percentage of oxygen (by volume) in mixture Shaded area is acceptable zone for unadapted humans. Adaptation extends the zone to the Min/Max tolerable lines. From Mitchell R. Sharpe, La Vie dans l'Espace, tr. Th. de Galiana, Larousse, (Paris, 1970), p. 111.
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