Word: tracer
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...already had permanent impact--in the form of radioactive isotopes. Radioisotopes play roles of tremendous importance in the treatment of cancer, materials testing, and in archaeological dating. Many physiological secrets, Woodbury predicts, will shed their mystery with the aid of new techniques of radioactive tracing. Woodbury briefly explains the tracer clues in photosynthesis, which scientists are now pursuing in an attempt to uncover the mysterious catalysts that hold the key to synthetic food...
...hierarchy of devils. Sheen remarked that, 'I have read every single line that Karl Marx ever wrote. I took a year off to study him.' His discourse on Marx and Communism was so brilliant that the editor had the sense of looking into a machine gun firing tracer bullets...
...line on the system: one year he spent 200 nights on sleepers. The son of a baggage master, Symes (rhymes with hymns) grew up near the tracks in his native Glen Osborne, Pa., got a job at 18 on the Pennsy. From clerk he was soon promoted to car tracer, to statistician in Cleveland, to freight movement director in Pittsburgh, to passenger superintendent in Chicago, to freight chief for the entire system. For the job he did heading up the Pennsy's western region during World War II, he was named operational vice president, then executive vice president...
Bloch, who received his Ph.D. from Columbia in 1938 after graduating from the Technical Center in Munich, has recently made use of radioactive carbon as a tracer in investigating the metabolism of amino acids. He holds the Harvey Medal for medical research...
Carved into the memory of every combat pilot are moments of total recall-the unforgettable glimpses of a foeman starting to smoke, the inescapable sounds of the typewriter-tapping of tracer on fuselage and rudder. Captain Heinz Knoke, winner of Nazi Germany's coveted Rit-terkreuz and the youngest squadron commander in the Luftwaffe, pinpoints his most vivid memory high above Helgoland, one July day in 1943. In I Flew for the Führer, Knoke tells how his Messerschmitt squadron loaded up with 500-lb. fragmentation bombs and climbed high above a formation of U.S. Flying Fortresses...