Word: tugged
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Dates: during 1960-1969
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...Cornell, Holley studied both the genetic code and its function in building proteins by analyzing "transfer RNA," a form of ribonucleic acid. RNA collects amino acids floating in the cell and, like a tug towing a barge, pulls them to an assembly site where, in the sequence dictated by the master DNA molecule, they are combined into the appropriate protein. Holley worked out the complete structure of a transfer RNA molecule, demonstrating how it attaches to a particular amino acid and brings it to the growing protein chain at the proper time and place...
Pennsylvania Pressure. While the vote was certainly a moral victory for the durable Minnesotan, few powers in the party yet view him as a serious possibility for the nomination. By slowing Kennedy, he increased Humphrey's already strong pulling power in the tug of war for convention delegates. The Vice President was adding to his long lead even before Oregon's votes were counted. In Florida, a slate of delegates pledged to Senator George Smathers as a favorite son, but favorable to Humphrey, captured 55 of the state's 63 convention votes. Members of Pennsylvania...
LAST Friday's agreement on Paris negotiations is an encouraging break-through, but despite Administration jubilance, the development is not a blanket vindication of U.S. peace policies to date. Waging a quibbling tug of war, the U.S. has dragged a concession on negotiating sites from Hanoi, but substantive talks are going to demand more flexibility and consistency than U.S. diplomats showed during last month's peace campaign...
Year-Round Passage. During its first full-scale tests on Lake Ontario, the Alexbow, attached to a 65-ft. barge pushed by a 1,320-h.p. tug, cleared a 30-ft. channel in unbroken blue ice 14 inches thick. It also knifed 180° turns as though the ice were butter. Running at speeds from 21 to 31 knots, the tug accelerated easily in thinner ice because there was no friction along the sides of the barge - the Alexbow had thrown all the troublesome chunks clear...
Since the trials, Alexander has refined his Alexbow. Pushed by a 2,500-h.p. tug, he says, it can now tackle ice from three to four feet thick. He also proposes a detachable version that could be fitted to any vessel, and a plow that could be built onto the bow of a ship during construction. "There is no question in my mind," he says, "that one day icebreakers will no longer be used. Cargo ships themselves will do the ice-breaking." In a prelude to such an era, two Alexbow-equipped barges will be driven...