Word: oxygenating
(lookup in dictionary)
(lookup stats)
Dates: during 2000-2009
Sort By: most recent first
(reverse)
...VBAC is real--and can be fatal to both mom and baby--but rupture occurs in just 0.7% of cases. That's not an insignificant statistic, but the number of catastrophic cases is low; only 1 in 2,000 babies die or suffer brain damage as a result of oxygen deprivation...
...draws political oxygen from confrontation with the U.S., reacted to Obama's charge by suggesting that the new U.S. leader has the "same stench" as Bush (whom Chávez accused of backing a failed 2002 coup against him). But anyone who has ever sat down with Chávez knows he's a more reasonable personality one-on-one than he is with a microphone in front of 50,000 people. As a result, say Chávez supporters, Obama should rely on the more dialogue-oriented foreign policy he promised in dealing with Chávez. (The President...
...branching of a tree. Every now and then, DNA moves between species. Viruses ferry genes from one host to another. Bacteria swap genes inside our bodies, evolving resistance to antibiotics in our own gut. Some 2 billion years ago, one of our single-celled ancestors took in an oxygen-consuming bacterium. That microbe became the thousands of tiny sacs found in each of our cells today, known as mitochondria, that let us breathe oxygen. When genes move this way, it's as if two branches of the tree of life are being grafted together...
...activated areas of the brain receive more blood and more oxygen, the optical properties [of the brain tissue] change," says Luu. "This allows us to infer the pattern of activity beneath." As it turned out, they inferred very well. Blood flow was not a perfect predictor, but fully 80% of the time, the pattern on the brain monitor did suggest the preferences the subjects had indicated earlier...
...playing sports with concussion symptoms so risky? During a concussion, arteries constrict, slowing blood flow to the brain. At the same time, calcium floods the energy-producing portions of brain cells. That calcium plays a mean defense, blocking oxygen- and glucose-rich blood from replenishing neurons' energy supply. Brain cells get sluggish, and a concussed athlete who can't focus or suffers from slower reaction times is left more susceptible to a slew of other injuries, including another concussion. A second blow to the head could lead to more arterial constriction and more calcium infusions. "Concussion produces an energy crisis...