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Your search has returned 22 articles:
  • News

    Tea compound aids dying brain cells

    From Washington, D.C., at the Fourth International Scientific Symposium on Tea and Human Health

    A constituent of green tea can revive moribund brain cells, Israeli researchers report. The team experimented with animal neurons that had been chemically poisoned to model the death of dopamine-producing cells in Parkinson's disease.

    In a test-tube study, low doses of epigallocatechin...

    09/26/2007 - 12:04 Biomedicine
  • Feature

    Squirt Alert

    As scientific adviser to a group of Maine watermen, ecologist Larry Harris had heard his share of stories. But one tale, told to him 2 years ago, proved unforgettable. A fisherman related how he had been hauling up a dredge used to scout for scallops in nearby Cobscook Bay when he snagged something novel: a life form resembling blobs of pancake batter.

    In all his...

    12/18/2005 - 18:25 Ecology
  • Food for Thought

    Organic Doesn't Mean Free of Pesticides

    In the United States, farmers treat most crops with pesticides to increase yields and the foods' eye appeal. Inevitably, studies have shown, traces of these pesticides remain on the food after harvest and are in the food we eat. However, switching to organically grown produce for as little as 2 weeks eliminated urine residues of potentially toxic organophosphate pesticides in children, a...

    11/23/2005 - 12:41 Agriculture
  • Feature

    A Galling Business

    As a consultant to the International Fund for Animal Welfare, Jill Robinson walked onto her first bear farm 12 years ago. At this facility in southern China, she found each bear standing not on a solid floor but on bars in a cage too small for the animal to take even one step. Although the Asiatic black bear is normally a solitary and clean animal, these cages were crowded together in...

    10/06/2005 - 12:25 Humans & Society
  • News

    Chimps ape others to learn tool use

    Much like people, chimpanzees are inveterate conformists whose copycat tendencies enable them to develop cultural traditions, a new study suggests.

    Andrew Whiten of the University of St. Andrews in Fife, Scotland, and his colleagues trained a high-ranking female in each of two chimpanzee groups to use a stick to release a food pellet from a ramp in a rectangular box.

    One...

    08/30/2005 - 12:56
  • Feature

    Armor-Plated Puzzle

    A few years after Francis H. Crick and James D. Watson unveiled the structure of DNA in 1953, they rocked the fledgling field of molecular biology again with a bold notion: Viruses are, in part, structured as crystals are. That idea captivated Donald L.D. Caspar and Aaron Klug, who then systematically applied what they knew about crystal geometry to classify and predict the structures that...

    08/29/2005 - 10:49 Numbers
  • Food for Thought

    Star Wars Goes Organic

    M&M chocolate-candy commercials are among the more entertaining on television. In the latest one, a plain and a peanut M&M character meet with Darth Vader of Star Wars. After a little muscular persuasion by Darth, the M&M guys announce they'll join "the dark side."

    M&M/Mars calls this its first installment in "Chocolate M-pire," an ad...

    05/19/2005 - 15:31 Nutrition
  • News

    First Plant Genome Thrills Biologists

    An international team of scientists has published the first nearly complete genetic blueprint of a plant. Now, thale cress—a small weed related to the mustard plant—joins more than 30 bacteria, baker's yeast, the nematode worm, the fruit fly, and the human in a growing roster of genetically decoded organisms.

    Hailed by many as plant biology's breakthrough of the decade, the...

    11/15/2004 - 12:00
  • News

    Keeping Cells under Control: Enzyme suppression inhibits cancer spread

    Shutting down an enzyme can slow the spread of cancer in mice, scientists in Israel report. The finding suggests that further study of this enzyme, called heparanase, might lead to a treatment for cancer patients.

    Normally, heparanase facilitates cell migration in the body. This enables immune cells, for example, to travel to sites of infection. To provide this service, heparanase...

    08/25/2004 - 12:11 Biomedicine
  • Feature

    Starting from Square One

    Quarks are the smaller-than-a-proton particles without which there would be no stars, dogs, or breakfast burritos. In 1986, after a dozen frustrating years of trying to find ways of using computers to calculate properties of quark-containing entities such as protons and neutrons, Kenneth G. Wilson threw in the towel at a physics meeting. Wilson, who had already won a Nobel prize for previous...

    08/03/2004 - 10:16 Physics