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Science News for September 20, 1999


Ultrapowerful laser system performs difficult industrial task on tabletop

Researchers at University of Michigan have developed a new isotope-separation process using an ultrapowerful laser system that can deliver up to 1000 times more power than the entire electrical generating capability of the US. This technique provides a futuristic alternative to bulky methods and opens possibilities for preparing medica...

SourceAmerican Institute of Physics·JournalPhysical Review Letters·DateSep 20, 1999

Substance abuse impacts co-workers

A new study found that workplace substance use has significant negative consequences for employees, including morale problems, increased injury risk, and poor communication. The researchers developed a team-oriented training to help work groups address co-worker substance use and promote employee well-being.

SourceCenter for Advancing Health·JournalJournal of Health and Social Behavior·DateSep 20, 1999

Analysis suggests women treated for breast cancer do better with axillary node dissection

A University of Iowa-led study found that women with Stage I breast cancer who did not receive axillary node dissections had significantly worse 10-year survival rates compared to those who underwent the procedure. The analysis suggests that many women with early-stage disease are not receiving this crucial treatment, which may impact ...

SourceUniversity of Iowa·JournalJournal of the American College of Surgeons·DateSep 20, 1999

A miserable life on overcrowded Earth in 2100

A new Cornell University study suggests that without democratic population-control practices and resource-management policies, the world's 2 billion people will face a difficult life by 2100. The report predicts an optimal population of 2 billion, with a standard of living about half that of the United States in the 1990s.