Word: lac
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Dates: during 1960-1969
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...viruses, the Harvard researchers knew, that invade an intestinal bacteria called E.coli and make off with several of its genes. But the two viruses capture only one bacterial gene in common: the one that enables E.coli to digest lactose, a sugar. Furthermore, the direction in which this so-called lac gene is inserted into the DNA molecule of one virus is opposite to its direction in the other virus...
...researchers placed them in the same test tube, reheated them and then cooled them slowly, a process that causes two chemically complementary strands of DNA to combine in a double helix. But the two strands were complementary only along the segments that had been parts of the original bacterial lac gene. Thus, only these segments could combine (Step 2). The remainder of the viral strands, unable to find properly matched partners, were left dangling. After these stray tails were chemically dissolved, only the single gene remained (Step...
...December issue of An Lac, a Saigon magazine, another professor, Mr. Nguyen Binh Tuyen, risked imprisonment to write the following...
...western outskirts of Paris, but fighting the traffic from there to the headquarters of the North Vietnamese delegation, in the Red-belt suburb of Choisy-le-Roi, proved nearly as difficult as a trip down the Ho Chi Minh Trail. The N.L.F. soon moved to the Chalet du Lac, a rented villa ($1,200 a month) in the sleepy, suburban town of Verrières les Buisson, eight miles southwest of the Paris city limits, but only 15 minutes' drive from the North Vietnamese headquarters, where the two delegations can coordinate strategy...
...changed their hours-5 to 8 in the morning, 5 to 7 in the evening-but on sunny days thousands of cyclists now jam the midday streets. The noisy streetcars are once again so crowded that passengers ride on their footboards. The tree-shaded boulevards around the Petit Lac, the garden spot in Hanoi's center, are daily thronged with strollers. The restaurants are full of people, many of them downing breaded shrimp, the favorite dish of Hanoi's residents. Each weekend, the routes in and out of Hanoi and Haiphong are jammed with parents headed...