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All forms of life that breathe oxygen--even ones northface that can't be seen with the naked eye, such as bacteria--must fight oxidants roshe run to live. "If they don't," says scientist Colleen Hansel of the Woods Hole Oceanographic Institution in Massachusetts, "there are consequences: cancer and premature aging in humans, death in microorganisms." These same oxidants g by guess also exist in the environment. But neutralizing cheap jordans environmental oxidants such as superoxide was a longchamp handbags worry only for burberry outlet organisms that dwell in sunlight--in habitats that cover a mere 5 percent of the belstaff jackets outlet planet. That marc jacobs was the only place where such burberry outlet online environmental oxidants were thought to exist. Now thomas sabo researchers have discovered the first light-independent source of superoxide.

The adidas shoes key fred perry is bacteria common in the depths of the oceans pandora jewellery and vikings nfl jersey other dark places. The bacteria breathe oxygen, just asics like humans. "And they're everywhere--literally," says Hansel, co-author of a paper reporting the results and published in this nike week's kate spade outlet issue of the journal Science Express. The result expands the known sources of superoxide to the 95 percent of Earth's habitats that are "dark." In fact, 90 percent of the bacteria juicy couture outlet tested in the study produced superoxide in the dark. huarache "Superoxide has been linked with light, such that its production in darkness was a real mystery," says Deborah Bronk of the National Science Foundation's (NSF) Division of Ocean adidas tracksuits Sciences, which co-funded the research with NSF's Division of Earth Sciences.

"This finding shows that bacteria can cowboys nfl jersey produce superoxide in the absence of light." The bacteria are found "miles beneath the seafloor, in hot fluids coming from underwater volcanoes, in every type of underground soil and throughout deep lake and ocean waters," Hansel says.The number of these coach outlet online bacteria in a thimble of seawater or soil is greater than the human population of San Francisco. And they're all releasing large amounts of superoxide. On Earth's surface, nike air "superoxide can kill corals, turning them white," says Hansel. "It can also produce huge fish kills during red tides. But it's not always bad." It also helps ocean microorganisms acquire the nutrients they need to survive.

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