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Your search has returned 18 articles:
  • News

    Spermicide Flip Side: Compound may promote papillomavirus infection

    A widely used spermicide may increase a woman's risk of contracting human papillomavirus from a sex partner, a study in mice suggests. On the other hand, a thickening agent in many vaginal lubricants sold commercially impedes the virus' ability to infect female mice via their genital tracts—even in the presence of the spermicide.

    It remains to be seen whether the findings will translate...

    07/03/2007 - 11:55 Biomedicine
  • News

    Dropping the Ball: Air pressure helps objects sink into sand

    Here's good news if you happen to drop something while you're strolling across a sandy section of Mars: You should be able to find what you dropped more easily than if you had dropped it into desert sands on Earth. And that's not just because of Mars' weaker gravity. Two teams of physicists have shown that a denser atmosphere, such as Earth's, makes a falling metal ball penetrate much deeper...

    07/03/2007 - 11:06 Physics
  • News

    Allergy Nanomedicine: Buckyballs dampen response of cells that trigger allergic reactions

    Scientists have shown that soccer ball–shaped carbon molecules, commonly called buckyballs, can block allergic responses in both human cells and mice. The findings point to a new way of treating allergies using these nanoscale particles.

    In recent years, several labs have begun harnessing the unusual physical and chemical properties of buckyballs to develop new drugs and diagnostic...

    07/03/2007 - 10:44 Materials
  • News

    Hidden Smarts: Abstract thought trumps IQ scores in autism

    There's more to the intelligence of autistic people than meets the IQ. Unlike most individuals, children and adults diagnosed as autistic often score much higher on a challenging, nonverbal test of abstract reasoning than they do on a standard IQ test, say psychologist Laurent Mottron of H´pital Rivière-des-Prairies in Montreal and his colleagues.

    The same autistic individuals who score...

    07/03/2007 - 10:05
  • News

    Bad News for Cats: Cat allergen hits all allergic people

    For people who have asthma or respiratory problems that are triggered by cats, living with Fluffy is obviously a bad idea. Now, researchers have found evidence suggesting that people who know that they have other allergies may also want to avoid the furry felines.

    Scientists who conducted a study across 14 European countries say that people allergic to irritants such as dust...

    07/03/2007 - 09:27 Biomedicine
  • News

    Faker Crayfish: Males keep bluffing but don't get caught

    Many males of an Australian crayfish species consistently fake their way through macho confrontations, a new analysis of rivalries indicates, even though evolutionary theory says that such bluffing should be rare.

    When two male slender crayfish (Cherax dispar) encounter each other, the one waving bigger claws typically sends the smaller-clawed creature fleeing, say Robbie...

    07/03/2007 - 08:53 Animals
  • News

    Polymer Breakdown: Reaction offers possible way to recycle nylon

    Each year, thousands of tons of nylon end up in landfills. But small-scale experiments may offer big hope for efficient recycling of some types of the material.

    Nylon-6, an artificial polymer used in carpets, clothing, and car parts, is made by chemically linking large numbers of molecules derived from a petroleum product called caprolactam. Current processes to break apart...

    07/03/2007 - 08:39 Earth & Environment
  • News

    Antibiotics in infancy tied to asthma

    Children given multiple doses of antibiotics before their first birthdays have a heightened risk of asthma later, a study shows.

    Researchers analyzed the medical records of 13,116 children born in Manitoba in 1995. Roughly 6 percent of the group developed asthma by age 7.

    Kids getting more than four courses of antibiotics during the first year of life were 1.5 times as likely to...

    07/02/2007 - 15:06 Biomedicine
  • News

    Smallest laser minds the gap

    The smallest, most efficient laser yet, a nanoscale device that consumes just 1 microwatt of power, could one day be a component of faster computers.

    Toshihiko Baba of Yokohama National University in Japan and his colleagues constructed the tiny laser out of a photonic crystal—a material with internal microstructure that controls the behavior of selected wavelengths of light...

    07/02/2007 - 14:51 Physics
  • News

    Oldest siblings show slight IQ advantage

    For more than a century, researchers have argued about whether first-born children tend to surpass their later-born siblings in intelligence. A large study now indicates that eldest sons indeed score slightly higher on IQ tests than boys with older siblings do.

    This IQ effect reflects how participants were raised, not absolute birth order, say Petter Kristensen of the National Institute...

    07/02/2007 - 14:37