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Your search has returned 61 articles:
  • Science & the Public

    Growth-promoting antibiotics: On the way out?

    In 1950, Science News ran a story showing for the first time that a potent antibiotic could do more than knock out disease. New animal experiments, we reported, “cast the antibiotic in a spectacular new role” as a livestock growth promoter. Lacing the food of hogs with trace quantities of this drug increased meat yields by up to 50 percent, scientists at Lederle Laboratories had reported at a...

    03/23/2012 - 13:30 Humans & Society, Nutrition, Earth & Environment, Biomedicine, Agriculture
  • Science & the Public

    Coffee perks up memory and balance in geriatric animals

    CHICAGO Millions of Americans start their day with a cup of coffee and then reach for refills when their energy or attention flags. But new research in rats suggests that for the aging brain, coffee may serve as more than a mere stimulant. It can boost memory and the signaling essential to motor coordination.

    But here's the rub: If the same effects hold for humans, downing a morning...

    07/22/2010 - 16:11 Body & Brain, Chemistry, Nutrition, Humans & Society
  • Science & the Public

    BPA and babies: Feds acknowledge concerns

    Federal health and research officials outlined new guidance today for parents on the use of hard, clear plastics made from bisphenol-A, a hormonelike chemical. Their bottom line: Minimize BPA-based products that could make contact with foods or drinks that infants or toddlers might consume — especially hot foods and drinks.

    But the Food and Drug Administration stopped short of...

    01/15/2010 - 18:37 Body & Brain, Earth & Environment, Humans & Society
  • News

    Floral Shocker: Blooms shake roots of flowering-plant family

    Imagine discovering a mammal without mammary glands or an insect with eight legs. Aquatic herbs in the genus Hydatella pose a similar paradox—they lack a defining developmental feature of flowering plants, raising questions about their evolution and rampant speciation during the past 135 million years.

    Evolutionary biologists group together organisms that share unique traits,...

    03/19/2008 - 13:25 Plants
  • Food for Thought

    Troubling Meaty 'Estrogen'

    Women take note. Researchers find that a chemical that forms in overcooked meat, especially charred portions, is a potent mimic of estrogen, the primary female sex hormone. That's anything but appetizing, since studies have linked a higher lifetime cumulative exposure to estrogen in women with an elevated risk of breast cancer.

    Indeed, the new finding offers a "biologically...

    10/17/2007 - 01:38 Nutrition
  • Food for Thought

    Sour Genes, Yes—Salty Genes, No

    Some people abhor broccoli, complaining about its intensely bitter taste. Others (myself included) find broccoli's flavor interesting and pleasing—decidedly, not bitter. What leads to our differing culinary opinions is the possession of, or lack of, (in my case, evidently) genes conferring a super sensitivity to bitter taste. Science has recognized such genetic differences for at least a...

    07/18/2007 - 09:52 Science & Society
  • News

    A smart pill for seniors?

    From Washington, D.C., at the Experimental Biology 2007 Conference

    Many people approaching retirement age find that memories fade and quick-wittedness flags. Scientists at the University of Massachusetts in Lowell have formulated what they call a "smart pill" to optimize brain health in such people. In pilot trials, its combination of dietary supplements boosted performance on simple...

    05/08/2007 - 14:49 Nutrition
  • Food for Thought

    Crusty Chemistry

    Want to make a piece of pizza healthier? Try using whole-wheat dough. Give it a full 2 days to rise, and then cook the tomato pie a little longer and hotter than usual. That was the recipe shared last week by researchers at the American Chemical Society meeting in Chicago.

    Jeffrey Moore and Liangli Lucy Yu of the University of Maryland at College Park have been experimenting with...

    04/03/2007 - 19:28 Nutrition
  • Feature

    Herbal Herbicides

    Certain plants are picky about the company they keep. Once established, walnuts and some sandy shrubs, for instance, create a virtually barren border of ground around them. Many other plants aren't quite so antisocial. They permit numerous species into their neighborhoods, while barring a few plant types.

    Chemical defenses play a major role in...

    03/13/2007 - 10:44 Agriculture
  • News

    Mafia Cowbirds: Do they muscle birds that don't play ball?

    Cowbirds in Illinois that sneak their eggs into other birds' nests retaliate violently if their scam gets foiled, researchers say.

    The brown-headed cowbirds of North America outsource nest building and chick raising. Female cowbirds dart into other birds' nests, quickly lay eggs, and rush away. The nest owners are left to care for big, demanding cowbird chicks.

    ...
    03/07/2007 - 11:56 Animals