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Science News for October 28, 2002


University of Pittsburgh reports effects of multiple concussions in high school athletes

A University of Pittsburgh study found that prior concussions may lower the threshold for subsequent concussion injury and increase symptom severity in seemingly mild subsequent concussions. The research, which compared 60 athletes with no prior concussion history to 28 athletes with three or more concussions, showed a significant incr...

Duke researchers report technique to make more-uniform 'buckytubes'

Duke researchers have made significant progress in synthesizing uniform 'buckytubes' using a new technique, which could lead to the development of smaller electronic circuitry and more precise control over their electronic properties. The achievement marks an important step towards realizing the full potential of carbon nanotubes.

SourceDuke University·JournalJournal of the American Chemical Society·DateOct 28, 2002

Even in middle age, cutting calories slows aging of the heart

Research published in PNAS found that caloric restriction can confer significant health benefits for the heart and extend its working life by exerting influence on the genetic program governing heart cells. In middle-aged mice, cutting calories prevented age-related genetic changes that damage heart cells and promote inflammation.

SourceUniversity of Wisconsin-Madison·JournalProceedings of the National Academy of Sciences·DateOct 28, 2002

Periodontal examinations could save lives

A comprehensive periodontal examination can save lives by detecting undiagnosed protein S deficiency, a condition that causes thrombotic disorders and increases the risk of strokes and heart attacks. Early diagnosis is key to successful treatment outcomes and improved survival rates for patients with this condition.

SourceAmerican Academy of Periodontology·JournalJournal of Periodontology·DateOct 28, 2002

Energized 'heartbeats' may explain why galaxies are continually stirred up, UCSD researchers say

A team of UCSD researchers found that regular outbursts of ultraviolet radiation from massive stars may play a significant role in stirring up galaxies. The simulation study suggests that this radiation acts as an important regulation mechanism, inhibiting further star formation and regulating the galactic perturbations.

SourceUniversity of California - San Diego·JournalThe Astrophysical Journal Letters·DateOct 28, 2002