Word: carbons
(lookup in dictionary)
(lookup stats)
Dates: during 1990-1999
Sort By: most recent first
(reverse)
...faster than predicted. That warning from scientists has led 93 nations to agree to speed up phasing out use of chemicals that destroy the atmospheric shield. Updating the timetable known as the Montreal Protocol, delegates at a United Nations conference in Copenhagen moved up elimination of chlorofluorocarbons (CFCs) and carbon tetrachloride to 1996, four years ahead of schedule. Halons and methyl chloroform will be banned earlier too, in 1994 and 1996, respectively. Researchers forecast more skin cancer as the ozone layer disappears...
...waves, plowed open by ice or formed by lava. But to speleologists, the most interesting are those that have been etched out of limestone by acidic water flowing underground. For a long time, researchers believed that nature could accomplish this feat in only one way: through the action of carbonic acid, which is produced when water reacts with carbon dioxide. The weak acid slowly dissolves bedrock. An underground stream forms, and an elaborate network of chambers like those found at Mammoth Cave in Kentucky takes shape. The unusual limestone terrains where this process occurs are known as karst, named...
...soccer ball has been dubbed "Fullerene C-60" as a tribute to the architect's innovative dome design. The late R. Buckminster Fuller, an eminent architect who was twice forced to leave the College, created the geodesic dome--which resembles both a soccer ball and a carbon molecule in shape...
...carbon molecule, which was discovered in liquid form in 1985 and in solid form in 1990, was named the "Buckyball," also in honor of Fuller. "It's named after him because of the similarityof his architectural structure," said Lowell D.Lamb, a member of the team that discovered thesolid form of Carbon 60 at the University ofArizona. "It's the third form of pure crystallinecarbon other than graphite and diamond...
Hoey said the carbon molecule and the soccerball, which is made of carbon, are closely relatedto one another--and to Fuller's architecturaldesign...