Word: nitrogenated
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...first time, however, concerns about the environment-rather than airworthiness-are playing a major role in determining the acceptability of a foreign aircraft. Some scientists have speculated that the Concorde's high-altitude emissions of nitrogen oxides could contribute significantly to the destruction of the ozone layer that screens the earth from an overdose of the sun's ultraviolet rays. Using these reports, the Federal Aviation Administration estimates that simply granting the pending Franco-British request for six flights a day could lead to 200 additional cases of skin cancer a year...
...will be required under present rules by 1978. Automakers get the vast majority of their cars past muster now by attaching catalytic converters that remove pollutants from exhaust after it leaves the engine but before it blows out of the tailpipe (see diagram). In order to get as much nitrogen oxide out of the exhaust as they must by 1978, however, the carmakers will have to resort to lower combustion temperatures, reduced compression ratios and other engine modifications. Those changes, they say, will cut into fuel economy, currently a prime concern of motorists. Critics contend that the industry should never...
...thirds water, the rest nitrogen, carbon, calcium and a myriad of other chemicals-worth only about $5, even at today's inflated prices. That is the strange machinery of the human body. It appears in unprecedented and almost incredible detail this week on the Public Broadcasting Service (see facing page). Produced by the National Geographic Society and Wolper Productions, created by Irwin Rosten and narrated by Actor E.G. Marshall, the hour-long film is entitled, naturally enough, The Incredible Machine. It uses microscopy, X rays and telescopic lenses tiny enough to penetrate the body's innermost recesses...
...former drainage basin. (Viking II's lander is targeted for an area near the planet's north polar hood, where moisture may still exist.) Instead of jet fuel, which would contaminate Mars with hydrocarbons, the landers' descent rockets are powered by purified hydrazine, a nitrogen-hydrogen compound. This, explains Richard S. Young, chief program scientist for the mission, will cause minimal pollution of the Martian environment...
...apparently was highly corrosive nitrogen tetraoxide (N 2 O 4 ), used as an oxidizer (or combustion agent) in Apollo's small attitude-control thrusters. If it is inhaled, the gas may cause only slight pain and coughing at first; but later, as it works its way into the lung tissue, it can lead to burnlike damage called pulmonary edema, filling the lungs with fluid. During their night aboard the carrier, the astronauts experienced considerable discomfort from coughing and were given cortisone in order to reduce lung inflammation. Next day when the carrier docked at Pearl Harbor, the three were...