Word: containing
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Dates: during 1960-1969
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Damaged Spots. The General Electric dating method, which was developed with Air Force backing, depends on the fact that nearly all rocks, including tektites and impactites, contain small traces of uranium. The uranium atoms split, at a slow, known rate and the fission fragments damage the glassy material in which they are embedded. The damaged spots are microscopic, but they can be made visible by a special etching technique. When they are carefully counted and compared with the amount of uranium present, those spots tell how long they have been accumulating and the date when the rock solidified...
...chapter on reform is essentially a synopsis of Wilson's The Amateur Democrat and fails consider what has happened to New York's reform movement in the last eighteen months. The chapter on the Negroes is also slightly dated, but to ask that a book published early this fall contain references to the events of last summer would be unfair...
Although geneticists agree that the giant molecules of DNA (deoxyribonucleic acid) contain the coded information that controls the development of living organisms, they have yet to decipher the message. But the varieties of experimental attack seem almost unlimited as stubborn scientific cryptologists continue to study one of nature's most intractable secrets...
...this one phenomenon Karlson has built a sweeping theory of how DNA controls the development of an organism, and how nature reads its own code. The great store of hereditary information that DNA contains, says Karlson, is not needed all at once. It comes into play gradually, as if it were being looked up, item by item, in a book of instructions. When the time comes for a larva to turn into a pupa, ecdysone secreted by its glands circulates among the cells and comes in contact with the long, ropelike molecules of the DNA in the chromosomes. The hormone...
...companies that are gunning for a share of the world's second largest natural gas deposit (after Texas). The Dutch government conservatively estimates that 1,100 billion cubic meters of gas bubbles under the Waddenzee Islands and the northern provinces. Others reckon that the fields contain five times that amount...