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Your search has returned 186 articles:
  • News

    Power from heat

    The thermoelectric effect can produce small amounts of electricity from almost any source of heat, but its low efficiency has so far limited its uses. A team has now found a simple way to make one thermoelectric alloy more efficient.

    When two ends of a stick of a thermoelectric material are exposed to different temperatures, a voltage appears. The electrons in the stick act like the...

    03/26/2008 - 11:25 Technology
  • News

    Fabulon: Looking less fabulous

    Researchers have tentatively linked polychlorinated biphenyls (PCBs) in people—and their dwellings—with Fabulon, a product used throughout the late 1950s and 1960s as a durable top coat for hardwood floors.

    During a survey of 120 homes on Cape Cod, Mass., researchers found two houses with unusually high PCB concentrations in air and house dust. Residents in both homes remembered a...

    01/30/2008 - 10:27 Earth & Environment
  • News

    Escaping flatland

    From Washington, D.C., at a meeting of the American Society for Cell Biology

    Nothing is more iconic of biological research than the petri dish. Yet the idea that growing cells in a flat dish can sometimes lead scientists astray is gaining traction.

    As an alternative, some researchers are experimenting on cells grown in gelatinous materials made from many of the same structural...

    12/11/2007 - 14:40 Other
  • News

    Biohazard: Smoking before or after pregnancy may harm daughters' fertility

    Exposing female mice to chemicals found in cigarette smoke before pregnancy or during the period in which they nurse their young impairs the reproductive capacity of their female offspring, a new study finds.

    Many women stop smoking when they discover they are pregnant, aware that this habit endangers the baby. The new data suggest that may not be enough to protect their daughters' long...

    11/20/2007 - 14:21 Biomedicine
  • News

    Persistent Prions: Soilbound agents are more potent

    Deformed proteins called prions cause fatal brain-destroying disorders, such as chronic wasting disease in deer and elk and mad cow disease, which can infect people. Evidence suggests that prions make their way into animals' nervous systems through ingestion, but scientists aren't sure.

    A new study shows that prions become more infectious when they latch on to soil particles that...

    07/18/2007 - 13:58 Biomedicine
  • News

    Slimming on oolong

    Without skimping on portions, rats eating diets including oolong tea gain less weight than those dining teafree, a new study finds. The tea apparently impairs the body's ability to absorb fat.

    The finding supports a weight-control strategy—oolong consumption—advocated by practitioners of traditional Chinese medicine, note Lauren E. Budd and her colleagues at the University of California...

    05/15/2007 - 15:09 Nutrition
  • 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
  • News

    Want that fiber regular or decaf?

    Researchers in Spain report that a cup of coffee can deliver a significant portion of daily dietary fiber. The drink hadn't been known to contain any fiber.

    Like the cholesterol-lowering substances found in oat bran, fiber in coffee consists of carbohydrates that the body can't digest, but which dissolve in digestive fluids. However, unlike oat bran's soluble fiber, the fibrous...

    02/20/2007 - 11:51 Nutrition
  • News

    Ingredient Shuffle: A trans fat substitute might have risks too

    A controversial nutritional test of a chemically modified fat suggests that the substance is more harmful, in at least some respects, than are the partially hydrogenated vegetable oils that it's intended to replace.

    Many food producers are phasing out partially hydrogenated oils, which contain trans fats, substances that have been linked to heart disease. For certain products, such as...

    02/07/2007 - 11:23 Nutrition
  • News

    Fish Killer Caught? Ephemeral Pfiesteria compound surfaces

    A team of researchers claims to have found an elusive algal toxin implicated in massive fish kills along the Mid-Atlantic coast in the 1990s. They say that the compound's characteristics explain why it has been so difficult to track down. Other researchers, however, remain skeptical.

    The hunt for a toxic product of the single-celled alga Pfiesteria piscicida dates to the early...

    01/17/2007 - 08:43 Chemistry