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Science News Archive March 2007 - Page 6


Page 6 of 18

Noninvasive cardiac T-Wave test

A new noninvasive test may identify patients with stage II and III nonischemic cardiomyopathy who are likely to benefit from an ICD. The test, called abnormal T-Wave Alternans (TWA), shows that patients with a normal test have a very good prognosis and are unlikely to benefit from the device.

iPods help docs improve stethoscope skills

A study at Temple University found that listening repeatedly to heart sounds on an iPod improved the stethoscope skills of general internists, increasing correct identification rates to 80%. This technique relies on intensive repetition and is essential for recognizing abnormal heart sounds and identifying dangerous conditions.

'Ancestral eve' was mother of all tooth decay

A NYUCD research team found that Streptoccocus mutans, a bacterium associated with dental caries, has evolved along with its human hosts in Africa between 100,000 and 200,000 years ago. This oral bacterial evidence supports the dispersal of modern Homo sapiens out of Africa to Asia.

SourceNew York University·JournalJournal of Bacteriology·DateMar 23, 2007

Laying microscale tiles

A team of researchers led by Kyung Byung Yoon found that manually applying microcrystals to a substrate yields superior results compared to self-assembly methods. The manual process allows for denser packing and more regular orientation of microcrystals, making it preferable in the overlapping range of 0.5 to 3 µm.

SourceWiley·DateMar 23, 2007

Simulated populations used to probe gene mapping

A new study published in PLoS Genetics used computer simulations to trace genetic changes over thousands of generations in a simulated population, testing the effectiveness of statistical genetic methods in identifying multiple genes causing complex diseases. The researchers found that known methods are limited and identified which met...

SourceRice University·JournalPLOS Genetics·DateMar 23, 2007

TV's beauty makeovers mask ugly truths

The Extreme Makeover show promotes a radical makeover program that enforces conformity to societal norms. The program sells the idea of cosmetic surgery as a means to uncover one's authentic self, but actually reinforces gender, age, class, and race standards.

SourceUniversity of Alberta·JournalFeminist Media Studies·DateMar 23, 2007

Making mice with enhanced color vision

Researchers created mice with both human and mouse visual receptors, allowing them to distinguish between previously indistinguishable colors. This breakthrough suggests the brain can adapt to new sensory information quickly, challenging the idea that early primates developed trichromatic vision gradually over time.

SourceJohns Hopkins Medicine·JournalScience·DateMar 22, 2007

Phone-based therapy eases depression long term

A new study by Group Health researchers found that phone-based therapy can lead to long-term positive effects on depression symptoms. Patients who received telephone psychotherapy soon after starting antidepressant medication showed strong positive effects at 18 months, with 77 percent reporting improved depression symptoms.

SourceGroup Health Research Institute·JournalJournal of Consulting and Clinical Psychology·DateMar 22, 2007

The root of dyscalculia found

Researchers at UCL induce dyscalculia in normal subjects using TMS, finding a causal link between right parietal lobe malfunction and the math learning disorder. This breakthrough study has implications for diagnosis and treatment, potentially leading to earlier interventions and more effective remedial teaching.

SourceUniversity College London·JournalCurrent Biology·DateMar 22, 2007