| liquid oxygen | 2.04 | The tank truck was filled with liquid oxygen. | ||
| pure oxygen | 1.84 | Pure oxygen. | ||
| supplemental oxygen | 1.65 | Almost all needed supplemental oxygen. | ||
| reactive oxygen | 1.51 | Among the putative mediators are reactive oxygen species. | ||
| dissolved oxygen | 1.38 | Dissolved oxygen, a sign of marine health, is well below acceptable levels. | ||
| extra oxygen | 1.38 | Extra oxygen tanks were being rushed to the scene. | ||
| low oxygen | 1.32 | The climbers adapted to the low oxygen flow in a variety of ways. | ||
| atomic oxygen | 1.12 | Theoretically, the work could lead to a hand-held atomic oxygen cleaner. | ||
| breathing oxygen | 1.05 | She was breathing oxygen through a tube. | ||
| bottled oxygen | 0.99 | He will not use bottled oxygen. | ||
| hyperbaric oxygen | 0.99 | The hyperbaric oxygen chamber is commonly known for treating the bends in scuba divers. | ||
| emergency oxygen | 0.79 | They were saved by the emergency oxygen system. | ||
| available oxygen | 0.72 | Plant growth also surges in the sunlight, reducing available oxygen. | ||
| home oxygen | 0.72 | Home oxygen at night can help you greatly. | ||
| portable oxygen | 0.66 | And behind the sofa where we sit is a portable oxygen tank. | ||
| fresh oxygen | 0.46 | The fresh oxygen set off a string of explosions. | ||
| new oxygen | 0.46 | The new oxygen generator will be tested over the weekend. | ||
| arterial oxygen | 0.39 | Directly measured tissue oxygen tension and arterial oxygen tension assess tissue perfusion. | ||
| existing oxygen | 0.39 | The existing oxygen supply lasts for several days and the crew also has a supply of air canisters. | ||
| free oxygen | 0.39 | So could malaria parasites be destroyed by assaulting them with free oxygen radicals? |