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Science News for October 9, 2008


Where optics meets medicine

Researchers have developed an animal model to study the effect of small strokes on nearby neurons, finding that blockages can cause significant decreases in blood flow and death of neurons. A potential new tool for brain surgeons is being developed using optical measurements to detect and protect critical areas during surgery.

SourceOptica·DateOct 9, 2008

Researchers discover how infectious bacteria can switch species

Scientists have developed a rapid new technique called Rapid Virulence Annotation (RVA) to identify toxins and virulence factors made by bacteria that allow it to infect different types of organisms. This discovery could lead to new vaccines and anti-bacterial drugs, as well as help prevent diseases caused by disease-causing bacteria.

SourceUniversity of Bath·JournalProceedings of the National Academy of Sciences·DateOct 9, 2008

Deep magma matters in volcanic eruption cycle

A team of researchers found that magma is continuously supplied from deep in the crust but a valve acts below a shallower magma chamber, releasing lava to the surface periodically. The upper reservoir is open and the lower reservoir refills at half the rate it was lost during lulls in eruption.

SourcePenn State·JournalScience·DateOct 9, 2008

JCI online early table of contents: Oct. 9, 2008

Researchers found that SREBP-2 induces expression of type 2 taste receptors in cultured mouse intestinal cells and enhances T2R-induced secretion of cholecystokinin. This mechanism may inform the gut about food-borne toxins and initiate a response to limit their absorption.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 9, 2008

New drug class: Angina

A new drug class, ranolazine, has been approved for the treatment of chronic stable angina, providing a safe and effective alternative to existing treatments. Ranolazine has been shown to reduce anginal episodes by one attack per week and extend exercise time before an angina attack develops, with benefits seen in men more than women.

SourceThe Lancet_DELETED·JournalThe Lancet·DateOct 9, 2008

Opening a can of worms: Serendipitous discovery reveals earthworms more diverse than first thought

A study by Cardiff University scientists has revealed that common earthworms in the UK are composed of multiple distinct species, each with unique roles in food chains and soil ecology. The discovery, published in Molecular Ecology, sheds new light on the importance of earthworms in agriculture.

Wildfires cause ozone pollution to violate health standards, new study shows

A new study by scientists at the National Center for Atmospheric Research finds that wildfires can boost ozone pollution to levels violating US health standards. The research focused on California wildfires in 2007 and found that they repeatedly caused ground-level ozone to spike to unhealthy levels across a broad area.

Researchers teach computers to search for photos based on their contents

A team of Penn State researchers has developed a new approach called Automatic Linguistic Indexing of Pictures in Real-Time (ALIPR) that enables computers to recognize the contents of photographs. The system uses statistical models to assign keywords to images based on pixel information, improving accuracy rates up to 90%.

SourcePenn State·JournalIEEE Transactions on Pattern Analysis and Machine Intelligence·DateOct 9, 2008

Promising new material that could improve gas mileage

A Northwestern University-led research team has identified a new material that can transform thermoelectric technology into one that converts waste heat into electricity, potentially improving gas mileage by 5-10 percent. The discovery is promising and could lead to widespread use in the automotive industry and other applications.

SourceNorthwestern University·JournalAngewandte Chemie·DateOct 9, 2008

Vitamin D a key player in overall health of several body organs, says UC Riverside biochemist

Research by Anthony Norman identifies vitamin D's potential contributions to good health in immune systems, insulin regulation, heart and blood pressure, muscle strength, brain activity, and reducing cancer risk. Adequate intake is essential for 36 organs, including bone marrow, prostate, and breast tissues.

SourceUniversity of California - Riverside·JournalAmerican Journal of Clinical Nutrition·DateOct 9, 2008

A new hand -- and signs of sensory recovery

A new hand transplant has shown emerging sense of touch in a 54-year-old man's former 'hand area' of the brain 35 years after amputation. The brain's map of the individual fingers is still evolving with increasing sensation, but researchers are optimistic about the potential for future recovery.

SourceUniversity of Oregon·JournalCurrent Biology·DateOct 9, 2008