Word: oxygenated
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Dates: during 2000-2009
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...airline seats, it came to be known as economy-class syndrome. (Former Vice President Al Gore, however, developed DVT in aircraft with plenty of leg room while he was campaigning for the presidency.) Many doctors suspected that the clots might be caused by low air pressure or changes in oxygen concentration during flight, in part because mountain climbers are known to develop DVT at high altitudes. But no one knew for sure...
...Journal of the American Medical Association caused such a stir. Scientists in Scotland asked 73 healthy volunteers to spend eight hours in a hypobaric chamber in conditions that simulated a plane flying at nearly 8,000 ft. Blood drawn after the test showed no evidence that air- pressure or oxygen levels had activated the clotting mechanism...
...help control the spread of cancers like leukemia that flare from the blood to the bone marrow and other tissues. Blocking a stem cell's source of nutrients might be another effective strategy for drug development. Unlike normal stem cells, which tap into many different blood supplies for the oxygen and growth factors they need to survive, cancerous stem cells seem to have more addictive personalities, zeroing in on one source and siphoning off everything they need. Exploiting that dependency by finding and cutting off the source would provide another way to tackle malignancies...
Those archaic plants prepared the way for the tetrapods. The plants created new aquatic habitats by stabilizing the banks of rivers and streams. They pumped oxygen into the atmosphere, making the earth habitable for large, air-breathing creatures. And they shed organic debris that formed the basis of a new food chain. Bacteria, fungi and small arthropods (the animal group that includes crustaceans and insects) moved in to feed on the debris; small fish moved in to eat the arthropods; bigger fish moved in to eat the small fish. Among them were the fishapod's lobe-finned ancestors, which found...
...amount of carbon dioxide in the atmosphere is climbing fast. Most of it comes from burning fuels for energy--gasoline in cars or coal for electricity, for example. The U.S., with less than 5% of the world's population, produces one-quarter of all greenhouse gases BURNING FORESTS REDUCES OXYGEN AND INCREASES DROUGHT SPREADING THE PAIN Deforestation, through clear-cutting or burning, sows havoc far beyond the affected area. The fires release still more carbon into the atmosphere, fewer plants survive to convert CO2 into oxygen, and scorched soil absorbs more heat and retains less water, increasing droughts ?Plants...