Uncategorized
- Physics
Molding Atoms: Using a tiny template to make tinier structures
With the help of a molecular mold composed of exactly 188 atoms, researchers have been able to impose textures at an even smaller atomic scale on a metal surface.
- Materials Science
Steely Glaze: Layered electrolytes control corrosion
Experiments with ultrathin organic coatings applied to steel suggest a new technique for slowing corrosion.
- Astronomy
Gamma-Ray Burst: A black hole is born
New evidence supports the notion that gamma-ray bursts, the most violent explosions in the universe, are the primal calling cards of newborn black holes.
- Anthropology
The DNA Divide: Chimps, people differ in brain’s gene activity
The distinctive looks and thinking styles of people and chimpanzees derive from the contrasting productivities of their similar DNA sequences.
- Health & Medicine
Vanquishing a Virus: New drugs attack herpes infections
Scientists have identified a new class of compounds that stop herpes simplex virus from replicating.
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18998
Are you sure you quoted Mark J. Nieuwenhuijsen accurately in this article? To wit: “. . . he was surprised to find that [the factors most influencing trihalomethane production in pools] include water temperature, large numbers of swimmers, and high concentrations of organic compounds.” Elevated temperature generally accelerates chemical reactions. More swimmers mean more grunge. […]
- Earth
Do your bit to fight toxic pool pollution
New data suggest that showering before a swim in the community pool could help limit the formation of toxic chemicals in the water.
- Health & Medicine
Diluted smallpox vaccine is potent
About 15 million doses of smallpox vaccine held by the U.S. government can be diluted to one-tenth their original concentration and still be effective for immunizing people.
- Plants
Trees dim the light on spring flowers
Early spring flowers and the sugar maples they grow under use different alarm clocks to get going in the spring, which can make life hard for the flowers in northern forests.
- Health & Medicine
Pulse pressure linked to dialysis death rate
People on kidney dialysis who have high pulse pressure—the difference between the top and bottom numbers on a blood pressure reading—seem to be at a greater risk of dying than those with low pulse pressure.
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Immune cells carry concealed weapons
Scientists propose that protein-cleaving enzymes called proteases are the real microbe destroyers in bacteria-killing cells called neutrophils.
- Humans
Web site debuts on junior high science
A new Web site reviews the accuracy of commonly used middle school physical science books and offers tips and assistance for teachers working from those texts.
