Word: ultraviolet
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Making a profit and protecting the planet don't have to be incompatible. Iceland, which sells kitchen appliances as well as food, has been a leader in marketing freezers and refrigerators that don't damage the atmospheric ozone layer, which protects us from harmful ultraviolet radiation. Old models were cooled by chemicals called chlorofluorocarbons, or CFCs, which can seep out and attack the ozone. And early CFC substitutes, though less destructive, were still not ideal. Last year Iceland brought out a brand of appliances cooled by isobutane, which does no harm to the atmosphere. On the food front, Walker tries...
...natural hormone called Alpha MSH, work for humans? When frogs are given a shot of the stuff, it triggers rapid pigmentation of their skin. Perhaps, the University of Arizona dermatologist thought, Melanotan might help humans develop a tan without their having to expose themselves to the damaging ultraviolet rays...
Calcium is not absorbed by the body without vitamin D. The ultraviolet rays of the sun manufacture D in the skin, but the efficiency of the factory declines with age. It drops even further if you live in the northern half of the country, where the sun is too low on the horizon half the year to help, and even lower if you keep your skin covered to protect it from cancer...
...price of a cab to Logan, paying customers get concentrated zaps of ultraviolet rays for 15 to 20 minutes. Why tough out hours in the sun when a brief rest on a tanning bed is all it takes? Thanks to modern technology, a crispy brown is only moments away...
...probes are supposed to drive themselves 4 ft. into the Martian crust. Once buried, they will deploy tiny drills and begin sampling the chemical makeup of the soil around them. Scientists believe that chemistry could be remarkably rich. "The surface of Mars has been pretty well sterilized by ultraviolet radiation," says Sam Thurman, the mission's flight-operations manager. The subsurface has been spared that scrubbing...