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Your search has returned 81 articles:
  • News

    Herbal therapy for beleaguered lawns

    Many people don't like the biting taste of mustard. Neither, it turns out, do sting nematodes—small, parasitic roundworms that siphon food from plant roots. That finding could prove good news for maintaining golf courses, sports fields, and other picture-perfect lawns.

    Some weeds and other plants naturally resist sting nematodes (Belonolaimus longicaudatus Rau). Suspecting that these...

    06/21/2006 - 09:33 Plants
  • News

    Two drugs are equal in preventing breast cancer

    A commonly prescribed anti-osteoporosis drug works as well at preventing breast cancer in postmenopausal women as the sole drug currently prescribed for the task, a head-to-head trial shows.

    Scientists designed the study to compare oral doses of the osteoporosis drug raloxifene (Evista) with tamoxifen (Nolvadex) taken for 5 years. Roughly half of the nearly 20,000 women received...

    05/02/2006 - 11:15 Biomedicine
  • News

    Leaden streets

    From San Diego, at a meeting of the Society of Toxicology

    When Arlene L. Weiss and her colleagues found that urban house dust tends to contain more lead the closer it is to a frequently opened window, they reasoned that most of the heavy metal arrives from outside. Their new survey now confirms that street grit is the probable source of lead in urban homes and that flaking paint from...

    03/21/2006 - 11:06 Earth & Environment
  • Food for Thought

    Protozoa Aid Food-Poisoning Germs

    Seemingly innocent microorganisms may have harmful consequences: Ubiquitous waterborne protozoa appear capable of aiding the survival of several types of bacteria responsible for gut-wrenching food poisoning.

    Maria T. Brandl and her colleagues focused on protozoa known as Tetrahymena after finding copious quantities of these renowned bacteria eaters...

    03/15/2006 - 17:06 Nutrition
  • Feature

    Magnetic Overthrow

    While conducting experiments for his physics Ph.D. in the early 1990s, Dan Ralph suddenly found himself in unfamiliar terrain without a compass. Examining nanoscale sandwiches of magnetic and nonmagnetic materials in a Cornell University lab, Ralph discovered that voltages caused by electric currents passing perpendicularly through these layers would sometimes increase abruptly for no...

    01/02/2006 - 15:31 Physics
  • News

    Urban fish show perturbed spawning cycle

    From Baltimore, at a meeting of the Society of Environmental Toxicology and Chemistry

    Sediment-dwelling English sole living in and around Seattle's urban waterfront exhibit spawning anomalies that might compromise their reproductive success, a team of aquatic biologists finds. The changes indicate chronic exposure to environmental contaminants that mimic the animals' own estrogen, the...

    12/04/2005 - 17:03
  • News

    Dairy fats cut colon cancer risk

    A diet high in dairy products dramatically reduces the risk of colon cancer, the third most lethal type of cancer, a Swedish study finds. The catch: To have the effect, these foods must be rich in fat, the component that nutritionists have been trying to pull out of whole milk and other foods for years.

    Previous studies of the protective effect of dairy foods against colon cancer had...

    11/14/2005 - 14:09 Nutrition
  • News

    Revisiting Einstein's incomplete theory

    Scientists have long known that Albert Einstein skipped something a century ago when he analyzed Brownian motion—the jiggling of particles in a fluid, such as pollen in water. Now, researchers using measurements of unprecedented precision have observed the discrepancy between Einstein's model and a single particle's path.

    In a landmark 1905 study that helped establish the existence of...

    11/08/2005 - 13:29 Physics
  • Food for Thought

    Leaden Chocolates

    Here's something that might give you pause after Halloween: Chocolates are among the more lead-contaminated foods. A new study has probed the source of chocolate's lead and concludes it's not the cocoa bean. Its concentrations of the toxic metal were among the lowest recorded for any foodstuff.

    The issue of lead-tainted chocolates is hardly new....

    11/03/2005 - 16:10 Nutrition
  • News

    Light Pedaling: Photonic brakes are vital for circuits

    Just as optical fibers have replaced most electrical wires for long-distance telecommunications, light-based circuits may replace electrical ones in applications involving vast flows of data within computers and networks. Now, a team of industrial researchers has taken what may be a crucial step toward such photonic circuitry: They've found a way to dial down the speed of light within...

    11/02/2005 - 12:01 Physics