Word: oxygenates
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Dates: during 1990-1999
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Doctors have long known that the heart can, in response to a drop in the level of oxygen-rich blood it's receiving, grow extra blood vessels. But the process, called angiogenesis, is often too slow and not extensive enough to stave off a heart attack. About 10 years ago, scientists started identifying certain proteins, called growth factors, that the body uses to build new blood vessels. The proteins act like foremen at a construction site, making sure that all the pieces of the project come together smoothly. Animal experiments showed that there were several ways to get growth factors...
...perhaps 10 million total species, even though we still deeply rely on at least 40,000 species for food, shelter, clothing and fuel. We rely on natural products to replenish genetic diversity in our crops and to produce new medicines. We rely on pristine ecosystems to replenish oxygen, regulate water cycles, control erosion, cycle essential nutrients and restock critical fisheries. We still need these things to sustain life--our life. The irony is that our rampant success in living outside the world's ecosystems has put them all, and thus ourselves, in jeopardy...
...started coming together last month--after she lampooned Sharon Stone's husband on SNL. Stone, unable to contain her boiling rage, burst out with what everyone has been thinking for months: "She lives in a rarefied air that's very thin. It's like she's not getting enough oxygen." Precisely. It's only a matter of time before Gwyneth suffocates. Because on set, off set, Gwyneth has convinced herself that the only way to gain respect is to act. To act continuously. After all, look at the track record--she's told us many times that...
...block the supply of oxygen to tumor cells, then that's an approach to controlling tumors," Corey said. "It's a very interesting scientific hypothesis. [Folkman] has been working in a pioneering way to test that...
...seizures or convulsions, according to Tsien. That's critical. The NMDA receptor shows up throughout the brain, and though calcium is crucial to learning and memory, too much of it can lead to cell death. That's what happens during a stroke: when brain cells are deprived of oxygen, they release huge amounts of glutamate, which overstimulates nearby NMDA receptors and kills their host cells. Nature may have designed NR2B-based receptors to taper off in adult brains for a reason. Some scientists fear that the altered mice may be prone to strokes. "You might worry about what happens when...