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Science News for October 27, 2010


Canada needs to improve end-of-life care

A Queen's University study reveals that Canada ranks ninth globally in end-of-life care quality, with low satisfaction rates among patients and families. Gaps in emotional support, communication, and patient-involvement are highlighted as key areas for improvement.

SourceQueen's University·JournalCanadian Medical Association Journal·DateOct 27, 2010

Researchers find a 'liberal gene'

A new study from the University of California, San Diego, and Harvard University suggests that a specific variant of the DRD4 gene may contribute to liberal political views. Researchers found that individuals with this genetic variant were more likely to be liberal if they had an active social life in adolescence.

SourceUniversity of California - San Diego·JournalThe Journal of Politics·DateOct 27, 2010

Glucosamine causes the death of pancreatic cells

High doses of glucosamine can cause the death of pancreatic cells, potentially increasing the risk of developing diabetes. Research by Université Laval's Faculty of Pharmacy found that prolonged exposure to glucosamine triggers a mechanism that negatively affects cell survival in the pancreas.

SourceUniversité Laval·JournalJournal of Endocrinology·DateOct 27, 2010

Research rejects green tea for breast cancer prevention

A large-scale study published in BMC's Breast Cancer Research journal found no overall association between green tea intake and the risk of breast cancer. The study assessed over 54,000 Japanese women and found that drinking green tea had no protective effect against breast cancer regardless of tea type or quantity.

SourceBMC (BioMed Central)·JournalBreast Cancer Research·DateOct 27, 2010

Introducing the 'A-Train'

The A-Train constellation of satellites, including Aqua, CloudSat, CALIPSO, and Aura, observe the same path of Earth's atmosphere and surface at various wavelengths. Multi-sensor measurements from the A-Train have helped scientists understand unexpected factors contributing to Arctic sea ice loss in 2007.

A speed gun for the Earth's insides

Researchers at the University of Bristol have developed a method to measure the movement of the Earth's deep interior, which controls continents and ocean locations. This technique uses seismic waves to study the properties of a mysterious layer called D″, where the mantle meets the core.

SourceUniversity of Bristol·JournalNature·DateOct 27, 2010

Low elevations hold climate surprises

A new study reveals climate change impacts low-elevation mountain plants more significantly than expected, with increased drought stress observed in forests below 4,000 feet. The findings inform local conservation strategies by predicting biological responses to climate change.

SourceUniversity of California - Davis·JournalProceedings of the National Academy of Sciences·DateOct 27, 2010

Narcotics and diagnostics overused in treatment of chronic neck pain

A study published in Arthritis Care & Research found that narcotics and diagnostic tests are overused in treating chronic neck pain, with only 53% of subjects prescribed therapeutic exercise. The researchers suggest that evidence supports the effectiveness of rehabilitation conditioning and acupuncture as treatments for chronic neck pain.

SourceWiley·JournalArthritis Care & Research·DateOct 27, 2010

November-December 2010 GSA Bulletin highlights

Researchers uncover new absolute timeline for first appearances of skeletal animals during the earliest Cambrian period, revealing diverse evolution. The study also explores sediment delivery dynamics at mountain stream confluences, finding debris flows significantly affect sediment storage in adjacent mainstem valleys.

SourceGeological Society of America·JournalGeological Society of America Bulletin·DateOct 27, 2010

Variable southeast summer rainfall linked to climate change

A study by Duke University scientists found that the Bermuda High's center intensified by 0.9 geopotential meters a decade from 1948 to 2007, leading to increased summer rainfall variability in the Southeast. This intensification is attributed to anthropogenic warming and is expected to continue in coming decades.

SourceDuke University·JournalJournal of Climate·DateOct 27, 2010

Educational researchers target earth and space sciences

A new five-year program at Penn State seeks to enhance the teaching of Earth and space sciences in middle grades and beyond. Researchers will investigate young people's understanding of fundamental scientific concepts and develop professional development approaches for teachers. The goal is to increase student conceptual understanding ...

Doctors' sense of mission, self-identity key in choice to work in underserved areas

A new study suggests that medical schools can tap into doctors' sense of mission and self-identity to increase the number of primary care physicians in medically underserved areas. Training students in underserved settings during medical school and residency can also improve their likelihood of continuing to serve those populations.

SourceUniversity of California - Los Angeles Health Sciences·JournalAmerican Journal of Public Health·DateOct 27, 2010

Friends with cognitive benefits

A University of Michigan study found that brief episodes of cooperative social contact enhance executive function, a key component of mental activity. Engaging in conversations with a friendly tone results in improved performance on common cognitive tasks.

SourceUniversity of Michigan·JournalSocial Psychological and Personality Science·DateOct 27, 2010