Word: hydrogenate
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...have now been shut down. They are the pioneering Hanford facility in Washington, where eight reactors have been deactivated and the remaining one is on indefinite standby; the Savannah River complex, where all three operational reactors are down, knocking out the only means of producing tritium, a hydrogen isotope that boosts the explosive power of nearly all the 22,000 U.S. nuclear warheads; the plutonium-processing plant at Rocky Flats near Boulder, Colo.; and the deceptively named Feed Materials Production Center, in Fernald, Ohio, where some workers are striking for higher wages and safer conditions...
Thursday morning, as I sat in front of the television watching NASA technicians worry the Discovery through its countdown, I ate a star for breakfast. The star was in the form of a waffle. It consisted mostly of carbon, nitrogen, oxygen and hydrogen, with a sprinkling of other elements. Except for the hydrogen, those atoms had been forged in a star that exploded and died long before our sun and solar system were born. The hydrogen was made in the big bang that allegedly began the universe. Some astronomers think that it was on dust grains floating in interstellar space...
...computer-enhanced photograph shows the galaxy as a brightly colored, amoeba-shaped mass. Next, the scientists determined the distance of the galaxy by taking an optical spectrum that revealed what one team member, Kenneth Chambers of Johns Hopkins University, calls cosmic fingerprints -- emission lines with sharp features characteristic of hydrogen and carbon. In distant galaxies, these lines occur at much redder wavelengths than those emitted by the same elements on earth; this so-called red shift, believed to be caused by the expansion of the universe, is what astronomers use to measure distance...
Several promising replacements are already being tested. One group, called HCFCs, or CFCs with an extra hydrogen atom, is already used in some home air- conditioners...
...five aborted engine tests so far have been due to fueling problems, specifically in lines that carry liquid hydrogen from ground equipment to the tank. After two of the failures, several hours were required to unload more than half a million gallons of liquid hydrogen and oxygen from Discovery's tanks before technicians could examine problems. NASA engineers are not certain exactly what caused last week's problem. Said Joseph Lombardo, who oversees the shuttle's main-engine project at Marshall Space Flight Center in Alabama: "We don't know whether it was a faulty indication or really a malfunction...