The source of the fire has still not been pinpointed, but it was widely speculated that a group of oxygen generators in the cargo hold may have caused or contributed to a blaze in the cargo hold of the DC-9.

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The carbon strips the silicon of its oxygen, allowing the silicon atoms to group together into nanoparticles as they cool.

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People in this group were also the only ones who showed a significant increase in their maximum oxygen consumption (which measures the capacity for aerobic exercise) compared to the non-exercising control group.

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"The AAP recognizes that monitors may be helpful to allow rapid recognition of apnea, airway obstruction, respiratory failure, interruption of supplemental oxygen supply, or failure of mechanical respiratory support, " the group states.

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