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Science News Archive May 2000 - Page 2


Page 2 of 6

Many common drugs promote tooth decay

Studies found that medications like clonidine and propranolol can significantly increase the risk of tooth decay in individuals with dry mouth. The research suggests that antihistamines, antidepressants, and other medications can alter saliva composition, making it less effective at neutralizing acids and remineralizing teeth.

SourceUniversity of Rochester·JournalCaries Research·DateMay 25, 2000

How stress maintains population levels

A Cornell University study reveals that a naturally occurring disease can regulate a wildlife population, with house finches experiencing a dramatic drop in numbers after an epidemic began. The research provides insight into the dynamics of other host/disease systems and has implications for understanding diseases like AIDS.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateMay 24, 2000

Ney honored for fish research

John J. Ney received the 1999 Outstanding Achievement Award from the American Fisheries Society for his long-term research on reservoir fish communities and their trophic relationships. His work has significantly impacted fisheries productivity, particularly in manmade waterbodies.

Equatorial water may have provided means of survival

Researchers from the University of Toronto and Texas A&M University suggest that a belt of open water near the equator may have supported life during the Snowball Earth era. This region could have provided refuge for early multi-celled animals, enabling them to survive and thrive in the face of extreme climate conditions.

SourceUniversity of Toronto·JournalNature·DateMay 24, 2000

Researchers identify key enzyme in aneurysm development

The study identified metalloproteinase-9 (MMP-9) as a key player in the development of abdominal aortic aneurysms. The researchers found that MMP-9 production was significantly reduced in patients who took doxycycline, suggesting a potential therapeutic strategy for preventing aneurysm expansion.

SourceWashU Medicine·JournalJournal of Clinical Investigation·DateMay 23, 2000

Astronomers wipe clean their cosmic window

An Australian-led team has captured the first picture of the sky in which the Milky Way no longer blocks our view of the Universe beyond. The new survey, HIPASS, used CSIRO's Parkes radio telescope to detect large numbers of small and faint galaxies, as well as giant clouds of gas that give off no light.

Scientists obtain cells that repair the spinal cord

Researchers train embryonic stem cells into oligodendrocytes, which can rewrap nerve axons and remyelinate damaged spinal cords. The study demonstrates a potential approach to restoring neurological function in patients with conditions such as multiple sclerosis and spinal cord injury.

SourceWashU Medicine·JournalProceedings of the National Academy of Sciences·DateMay 22, 2000