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Your search has returned 18 articles:
  • News

    Gold quantum dots

    From Philadelphia, at a meeting of the American Chemical Society

    Scientists have created a new type of quantum dot that could find applications in everything from biological imaging to computer displays. Like their semiconductor counterparts (SN: 2/15/03, p. 107: NanoLights! Camera! Action!), these tiny clusters of gold atoms fluoresce brightly and emit different wavelengths of light...

    09/07/2004 - 15:38 Physics
  • News

    Molecular machines split water

    From Philadelphia, at a meeting of the American Chemical Society

    Instead of running fuel cells on hydrogen derived from fossil fuels, a future hydrogen economy might be driven by water and sunlight. Inspired by natural photosynthesis, chemists at Virginia Polytechnic Institute and State University in Blacksburg have devised complex molecular machines that use the sun's energy to split...

    09/07/2004 - 15:31 Chemistry
  • News

    Juice could ward off cancer in smokers

    From Philadelphia, at a meeting of the American Chemical Society

    Although citrus products confer numerous health benefits to the population as a whole, a new study shows that citrus is a particularly wise dietary choice for smokers. According to researchers at the University of Hawaii's Cancer Research Center in Honolulu, drinking grapefruit juice every day could reduce the risk of...

    09/07/2004 - 15:25 Nutrition
  • News

    Compost reduces landfill gas

    Mountains of decomposing garbage release about 10 million metric tons of methane each year in the United States alone. To reduce gas from landfills, communities should start treating them more like backyard gardens, a report in an upcoming Environmental Science & Technology suggests.

    In field tests at a landfill in Louisville, Ky., Morton A. Barlaz of North Carolina State...

    09/07/2004 - 15:06 Earth & Environment
  • News

    Owls use tools: Dung is lure for beetles

    Burrowing owls' habit of bringing mammal dung to their burrows is an example of tool use, researchers say. The dung attracts beetles, an important part of owl diets, the scientists have found.

    Owl watchers have long known that Athene cunicularia collects dung from mammals such as cows. They've also observed that if this dung disappears from the birds' burrows during the...

    09/07/2004 - 14:50 Animals
  • News

    Immune reaction to poison gas brings delayed effects

    In the weeks following their poisoning by carbon monoxide gas, some survivors develop concentration problems, personality changes, or sensory impairments. The causes of these neurological symptoms and their delayed onset have perplexed scientists.

    Now, researchers at the University of Pennsylvania in Philadelphia have identified a potential explanation: a misguided immune response to a...

    09/07/2004 - 14:36 Biomedicine
  • Feature

    The Ultimate Crop Insurance

    In late summer 2002, looters threatened war-engulfed Afghanistan's agricultural heritage. Unknown pillagers dumped stocks of carefully labeled seeds as they ransacked buildings in Ghazni and Jalalabad, where the material had been hidden for safekeeping. All the looters wanted, apparently, were the plastic and glass jars in which the seeds were stored. The scattered seeds weren't the starter...

    09/07/2004 - 14:12 Agriculture
  • Feature

    Figuring Out Fibroids

    There was a lot that Cynthia Morton didn't know about uterine fibroids when she began studying them in 1989. She didn't know, for instance, that she already had or would soon develop one. That revelation came during her pregnancy in 1991, when a fibroid showed up on an ultrasound test she had received to monitor the pregnancy. For Morton, a geneticist at Brigham and Women's Hospital in Boston...

    09/07/2004 - 13:00 Biomedicine