1.   The advantage lay in their using less oxygen, being less tired and being able to carry more samples and equipment about.

2.   More recent studies have recommended that nasal oxygen be used for elderly patients or for patients in general.

3.   Because active brain cells use more oxygen, they can be seen as hot spots against a background of less active cells.

4.   Aerobic bacteria, Richter explained, process energy by using oxygen to break down carbohydrates, which provide energy to cells and release carbon dioxide and water.

5.   But when the plant is cut, said Bell, its respiration reverses so that it uses oxygen and gives off carbon dioxide.

6.   Conventional rockets use oxygen stored on board.

7.   Grinko is a big proponent of this training method, believing higher elevation levels force an athlete to learn to use oxygen more effectively.

8.   He uses the oxygen by his bed more often.

9.   His research showed how white blood cells use oxygen to strengthen their defenses against bacterial intruders.

10.   Karen Johnson thought her house was on a priority repair list because her husband and mother both use oxygen.