Word: tracers
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...night in careful inhalations, silent exhalations, and the clack of bamboo signal sticks used by the Viet Cong patrols that passed within 50 feet of its hideout. Then, at 2 a.m., a single shot blasted the night: Brown's radio man, shifting his M16, had accidentally triggered a tracer round -almost certainly disclosing the team's position. Brown hung tough, hoping that the cross-wave of jungle echoes would confuse the enemy searchers. It did, and at dawn the team moved back in to hunt out the Viet Cong base camp...
Marines at the artillery base at Gio Linh, about five miles south of the DMZ, witnessed the first successful deployment of SAM missiles in the area. Looking like a giant tracer bullet against the night sky, one Russian missile soared up, its firetail swishing as it chased a Marine A-4 Skyhawk maneuvering violently to escape. A sudden fireball erupted as the SAM hit its target. The use of SAMs along the DMZ could curtail the now frequent use of B-52 bombers along the much-buffeted buffer zone. The threat of SAMs has kept the less maneuverable eight-engine...
...candied than candid, Leslie Uggams and Robert Hooks perform with unblemished, infectiously likable honesty. Apart from being lovely to look at, Uggams has a shy sly smile that burgles the theater house. She can cradle a song with her voice or rifle it toward the night sky like a tracer bullet. At 23, she is a Broadway find with a future...
...Lactose Tracer. Although the brilliant concept of Jacob and Monod had become generally accepted by 1965, when it helped to win for them the Nobel Prize in Medicine, no one had ever been able to provide direct laboratory proof that their concept was correct. Now the evidence has begun to come in. Harvard University scientists have succeeded in isolating and analyzing two of the Hitherto theoretical substances that repress gene activity...
...Harvard scientists devised their experiment on the premise that the lactose must have prevented the represser from turning off the appropriate gene -probably because it was attracted by the represser and combined with it chemically. With a sophisticated technique, they allowed radioactive lactose-like molecules that served as tracers to be attracted by a concentrate of bacteria cell material. Isolating and analyzing the substance that had combined with the tracer molecules, they discovered that it was a large protein molecule - their long-sought "lactose represser...