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Extra resources for Science (Vol. 312, No. 5770, 3 March 2006)
Sample text
75 million— a recently discovered 17th century manuscript, containing Royal Society minutes recorded by famed physicist Robert Hooke, just before it was due to be auctioned off on 28 March. HOPPERS AND CREEPERS TREED A new amphibian family tree—probably the biggest phylogenetic tree ever completed for a class of vertebrates—was unveiled this month and has already attracted some carping from rival treemakers. The project, detailed in 370 pages in the current issue of the Bulletin of the American Museum of Natural History, was instigated by Darrel Frost, an evolutionary biologist at the American Museum of Natural History in New York City.
But the proposal by Representative Richard Pombo (R–CA) to reauthorize the 30-year-old Magnuson-Stevens Act would also elevate the role of science in fisheries management. And many environmentalists and scientists hope that legislators will tap elements of a second bill introduced last week to produce something more to their liking. “I think we’re moving in the right direction, but there are some things that make me nervous,” says Andrew Rosenberg of the University of New Hampshire, Durham. R. R.
At one electrode, hydrogen molecules are stripped of their electrons, which are then sent through an external circuit to do work. The leftover protons are channeled through the polymer membrane to another electrode, where they meet up with oxygen and the circulating electrons to produce water. But making good proton conductors from polymers isn’t easy. Nafion’s strategy is to link acid groups to the end of fluoropolymer chains. Because acids hold on to their protons only loosely, they are good proton conductors.
Science (Vol. 312, No. 5770, 3 March 2006)
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