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Your search has returned 15 articles:
  • News

    Laser links segue to chemical bonds

    From Long Beach, Calif., at a meeting of the American Physical Society

    The light touch of a laser beam can shackle microscopic particles together to make an unusual form of matter. Now, a team of Tennessee researchers finds that this optical binding can set the stage for a chemical encore.

    In the late 1980s, scientists at the Rowland Institute for Science and Harvard University,...

    11/05/2002 - 16:50 Physics
  • News

    Electron cycling in quantum confines

    From Long Beach, Calif., at a meeting of the American Physical Society

    Like a race car forced to stay within certain lanes of a speedway, a lone electron in a circular path should whirl along exclusively in specific allowed orbits, the rules of quantum mechanics say.

    In a Harvard University laboratory, physicists have devised an extraordinarily small, low-energy cyclotron in which...

    11/05/2002 - 16:49 Physics
  • News

    Nervous tics in the heart

    Nerve growth run amok may explain why, after surviving a heart attack, some people begin to suffer from irregular heartbeats and may die suddenly when their heart stops beating.

    Scientists have known that heart attacks damage both the heart muscle and the nerves that infiltrate the muscle. The electrical signals that trigger the heart to beat are impaired when sent through damaged...

    11/05/2002 - 12:59 Biomedicine
  • News

    Waiting to exhale

    A simple breath test can help identify patients most likely to suffer severe side effects of chemotherapy with docetaxel, one of the most widely used anticancer drugs. This is a result of a small study published in the April Clinical Cancer Research.

    The new test measures the activity of an enzyme known as cytochrome p450 3A4 (CYP 3A4), which breaks down, or metabolizes, docetaxel and...

    11/05/2002 - 12:58 Biomedicine
  • News

    New views of Jovian moons

    Bombarded by charged particles and exposed to large magnetic fields, the Galileo spacecraft recently braved several passes through Jupiter's radiation belts to get a closer look at the planet's volcanically active moon Io. As it neared Io, the craft also captured portraits of Metis, Amalthea, and Thebe, three of Jupiter's small, innermost moons.

    The new images, released...

    11/05/2002 - 12:43 Astronomy
  • News

    Galaxies shine light on dark matter

    More than 80 years ago, Albert Einstein made an astounding assertion: Gravity bends light. A clump of matter can act like an irregularly shaped piece of glass, altering the path of light rays from an object that lies behind it and creating a distorted image.

    The material doing the distorting, an effect known as gravitational lensing, needn't be visible stars or galaxies. The unseen...

    11/04/2002 - 18:10 Astronomy
  • Feature

    Hunting Prehistoric Hurricanes

    The transformation was stunning: One moment a nondescript tropical storm, the next, a hurricane of an intensity no American alive had ever experienced. The storm did not grow through some gradual accretion of power; it exploded forth like something escaping from a cage. The Weather Bureau of 1900 had a code word for winds of 150 miles an hour—extreme—but no one in the bureau seriously...

    11/04/2002 - 17:33 Earth
  • Feature

    Red Snow, Green Snow

    Microbiologist Brian Duval hates this part, so let's just deal with the snickering up front. Yes, he studies yellow snow.

    He also studies red, green, and orange snow and would love to examine other colors if he were lucky enough to discover them. His palette comes from springtime blooms of algae that live only in deep,...

    11/04/2002 - 12:38
  • News

    Motor City hosts top science fair winners

    They may not have lived up to the classic Motown hit by dancing in the street. But more than a thousand high school students from around the world still had a ball last week in Detroit, where they gathered for the 51st International Science and Engineering Fair (ISEF). The students met with Nobel and Draper prize winners, toured high-tech automotive design centers, and visited a replica of...

    11/01/2002 - 18:04 Humans & Society
  • News

    Bdelloids: No sex for over 40 million years

    Talk about a dry spell. Microscopic bdelloid rotifers have seemingly evolved without sex for millions of years and probably don't exist in male form, say Harvard University biologists.

    The bdelloid genome shows an odd pattern of differences between versions of the same genes, report David Mark Welch and Matthew Meselson. This pattern most likely arose during eons without sex...

    11/01/2002 - 17:48