11.   Rather, they use solvents the way people use oxygen, for the cycle of biochemical reactions known as respiration.

12.   She learned she could take a few deep breaths when someone cut her off in traffic, using oxygen to clear her mind instead of fan her flames.

13.   The chemical is added to lakes and reservoirs, where it kills all the fish by inhibiting their ability to use oxygen.

14.   The major effect of his ailment, he said, has been on his ability to use oxygen during a race to refresh his muscles.

15.   Zinc-air batteries use normal oxygen to fuel a chemical reaction that generates their charge.

16.   Aerobic exercise, which requires the body to use more oxygen, raises levels of free radicals.

17.   Arnon was best known for his discovery of photosynthetic phosphorylation, the method by which plants use oxygen to obtain energy in the same way humans breath.

18.   He said the former autocrat was conscious but was occasionally using oxygen to help him breathe.

19.   He was best known for his discovery of photosynthetic phosphorylation, the method by which organisms use oxygen to obtain energy in the same way humans breath.

20.   Hillary said Tuesday he doubted Mallory and Irvine, who were not using oxygen, reached the top.