单词：chitinolytic activity
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This is Scientific America's Sixty-Second-Science. I am Steve Mirsky. Got a minute? Some interesting electrical activity in the clouds of ash drifting around Europe as a result of that Icelandic volcano. Models predicted that electrical charge should
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Health Report - With Physical Activity, No Need to Be an Olympian This is the VOA Special English Health Report. Watching the Olympics probably made some people feel a little guilty about not exercising. The truth is, if physical inactivity were a sp
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Diplomatic activity aimed at ending the violence in eastern Democratic Republic of Congo is intensifying. The United Nations mediator for eastern Congo, former Nigerian President Olusegun Obasanjo, arrived Thursday in Kinshasa for talks with Congole
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By Zulima Palacio Washington 25 February 2008 A permanent, live butterfly exhibit recently open at the National Museum of Natural History in Washington. And for the first time, the museum is charging visitors an admission price. But as VOA producer Z
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By David McAlary Washington 11 July 2006 Former dancer Ann Smith leads a stretch class at Munson Community Health Clinic in Traverse City New medical research shows that elderly people can prolong their lives without vigorous exercise. The study of
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By David McAlary Washington 13 July 2006 We often hear that imagining something will not make it so. But scientists have now overturned that adage, making a science-fiction dream come true. U.S. researchers have shown that a paralyzed patient can us
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