Word: nitrogenous
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...home snared an unsuspecting cardinal. "I felt so bad about it," says Meryman, "that I decided I ought to give the bird a place in posterity." No taxidermist. Biophysicist Meryman, 39, tried an experiment. Posing the cardinal carefully, he first froze its joints into position with liquid nitrogen, then popped the bird into his kitchen freezer. When the moisture in the bird's body had turned to ice, Meryman used a vacuum pump and a chemical desiccant to remove the water in the form of vapor from the frozen body. The result: a thoroughly dehydrated but intact specimen suitable...
...Director Clark is always on the look out for more; the earth swarms with mi-crospecimens that he feels could do service by taking a long, standardizing sleep in his refrigerators and liquid nitrogen tanks...
...heat until he finds himself suddenly exhausted ; holding his breath during the last 30 ft. of ascent can rupture his lungs as they expand under the rapidly decreasing pressure; successive deep descents can cripple him with the old diver's disease of the bends unless he decompresses the nitrogen bubbles in his blood by lingering at graduated stages...
Most treacherous of all is nitrogen narcosis-"rapture of the depths." Below 140 ft. the buildup of nitrogen in a diver's body somehow drugs his senses as alcohol does. Magnificently drunk, the diver becomes an underwater god. He may offer his mouthpiece to a passing fish. Maurice Fargues, a great diver on the Cousteau team, was brought up dead from 394 ft., his mouthpiece hanging loose around his neck. "I personally am quite receptive to nitrogen narcosis," says Cousteau. "I love it and fear it like doom...
After allowing them to divide in the medium for several days, Sueoka transferred the cells with heavy DNA to a medium with normal nitrogen. Two hours later he extracted some DNA from these cells and found that it had a molecular density half-way between heavy and normal DNA. It appeared as though the heavy DNA had separated into two heavy strands and each had manufactured a new partner containing normal nitrogen...