Word: prevented
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Dates: during 1960-1969
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...Warsaw. Police turned a water-gun truck and tear-gas launchers on the mob, waded into its midst with rubber truncheons and hustled some 300 off to police headquarters. At least six students accused of being ringleaders got jail sentences of four to six months. To prevent a spread of violence to factories, the government transported busloads of workers to antiprotest rallies...
Last week Cavett interviewed Comic Pat McCormick, who discussed the possible effects of a steel strike on the California Christmas-tree market. Cavett is still too innocent to prevent a veteran pitchman like Art Linkletter from wresting the show away from him and giving a 15-minute spiel for a new game he helped invent. But in defense, Cavett, a former gag writer, can fall back on old material. Once, he said, when he was out of work, he used to write dirty jokes for kids to use on Linkletter's TV House Party...
Hematologists have long sought ways to prevent the formation of dangerous and possibly fatal blood clots. First there was heparin, extracted from the livers and lungs of beef cattle. Then came coumarins, made from rotted sweet clover. Now some British researchers believe they have found what they want in the venom of a Malayan pit viper, close kin to American rattlesnakes...
...trouble with heparin and some other anticoagulants is that they not only prevent clotting, but may overshoot the mark and make a patient liable to hemorrhage. Doctors in Malaya, treating victims of pit viper bites, noticed that they never seemed to have trouble with clots, and neither did they bleed excessively. Years of research to purify the active part of the venom yielded a substance named Arvin by London's Twyford Laboratories. Now, reports in the Lancet testify to the potential of Arvin, given intravenously...
...Warren Center plans a similar revision every five years, to prevent a repetition of this massive task. Tentative plans also call for a paperback supplement every year...