Word: carbons
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Dates: during 1990-1999
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...never thought my one year of Harvard education would mean very much in the real world, but I still hoped for something more interesting than handing out casino coupons and inhaling carbon monoxide fumes on a bus platform...
Smoke from burning coal and car exhausts contains carbon monoxide, a host of carcinogens and sulfur dioxide, which helps form the acid rain that is withering Europe's once lush forests. In Poland more than 50,600 hectares (125,000 acres) of woodland have been destroyed, and nearly half the remaining trees are damaged. More than 32,400 hectares (80,000 acres) of Czechoslovakia's forests have been lost...
...final chapters of his book on Stalin. Medvedev showed my essay to friends (which I had given him permission to do), and he passed on their comments. After making a few changes, I gave the manuscript back to Medvedev. He was going to produce a dozen or more carbon copies. Some, he warned me, might end up abroad. I replied that I had taken that into account. (We were communicating in writing to foil eavesdroppers...
...with a child in tow, bicycle frames undergo incredible stress, especially where the hollow tubular pieces are joined. For decades, engineers struggled to strengthen frames while making them lighter. That task seemed impossible until manufacturers turned to materials used for jet fighters and missiles. Frames constructed of aluminum, titanium, carbon fiber and various metal combinations have proved to be stronger, stiffer, more shock absorbent and lighter than steel ones. The popular Kestrel frames from Cycle Composites, based in Watsonville, Calif., are made of molded carbon fiber. One-piece and aerodynamically designed, they are stronger and up to 1 kg lighter...
...shape. In the mid-'80s, solid "disk" wheels made of Kevlar improved matters but were somewhat hard to control in crosswinds. A solution came early this year from Specialized Bicycle Components of Morgan Hill, Calif.: a three-spoke wheel developed with Du Pont. Specialized's wheel, a composite of carbon fiber, epoxy resin, Kevlar and aluminum, has an air-foil shape, and was designed with a Cray supercomputer. Tests proved the wheels are faster and more durable than traditional ones...