Word: coate
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Dates: during 1990-1999
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Every family should have a painting like this -- huge (10 ft. by 6 ft.) and vastly heroic. The man in the white coat is none other than Richard Nixon, memorialized as Vice President in 1956, when he consoled Hungarian refugees in Austria after the Hungarian revolution. The painting, by Hungarian emigre Ferenc Daday, is on display in the Nixon Library in Yorba Linda, California...
...many as 12 million. Animal-rights activists have crippled the fur trade, and killing helpless animals for sport is no longer fashionable. The result is that these mindlessly multiplying creatures are chewing up more trees than anyone can count. It is foolhardy to suggest that the anti-fur-coat folks should now retreat and give thousands of women -- not to say the environment -- a break. It is not crazy, however, to provide the beavers with contraceptives, so Wildlife 2000 has arranged to trap beavers, sort out the females and fit them with Norplant, the birth-control device. It might work...
...formidable enough opponent, mainly because researchers still don't understand the method to its madness. Like all viruses, HIV is simply a strand of genetic material (in this case the nucleic acid RNA) surrounded by a protein coat. A virus lacks the tools to reproduce unless it invades a living cell and takes over the host's molecular machinery. The intruder can then produce many copies of itself, eventually killing the cell. One of HIV's favorite targets is the CD4 T-cell, an important player in the human immune system...
Neutralizing HIV is especially tough because its coat is laced with sugar molecules that shield it from the human immune system. Some viruses, such as the one that causes polio, have no sugar in their protein coat. Others, like flu viruses, have only a little. It is no coincidence that the most effective vaccines have been made to fight these kinds of viruses. Never before have scientists tried to devise a vaccine against a pathogen as well protected...
...meantime, Dr. Robert Redfield of the Walter Reed Army Institute of Research in Washington and his colleagues are trying to develop a vaccine that helps people who are already infected. By injecting a slightly modified form of the virus' protein coat, the Army researchers hope to kick-start the patients' immune systems into mounting an effective counterattack. Redfield thinks that his version of the viral coat may share enough characteristics with all the known mutant strains of HIV to overcome the variability problem. Said Redfield, a rare, unabashed optimist at the Amsterdam meeting: "I believe HIV is very simple, very...