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Science News Archive February 2009 - Page 17


Page 17 of 24

Scientists document salamander decline in Central America

A new study by University of California, Berkeley biologists reveals that many common salamander species have plummeted in Central America, contradicting previous attributions to habitat destruction and pesticides. Instead, researchers believe global warming is driving these species to higher elevations where habitats become inhospitable.

SourceUniversity of California - Berkeley·JournalProceedings of the National Academy of Sciences·DateFeb 9, 2009

Batteries get a boost at Rice

Researchers at Rice University have created hybrid carbon nanotube metal oxide arrays as electrode material that may improve the performance of lithium-ion batteries. The new design could lead to longer-lasting electric cars and gadgets, as well as enhanced capabilities for electrochemical capacitors and fuel cells.

SourceRice University·JournalNano Letters·DateFeb 9, 2009

Minority health-care clinics separate but unequal

Researchers found that clinics serving higher proportions of minority patients tend to have more challenging work environments and organizational characteristics. This can lead to unfavorable patient and physician outcomes, including lower job satisfaction, increased stress, and burnout.

SourceLoyola Medicine·JournalArchives of Internal Medicine·DateFeb 9, 2009

Model of pre-exposure prophylaxis against HIV forecasts benefits, potential cost-effectiveness

A new mathematical model predicts that pre-exposure prophylaxis (PrEP) could substantially reduce the lifetime risk of HIV infection, but its cost-effectiveness varies depending on target population and drug costs. With modest improvements, PrEP might be as effective as other public health interventions.

SourceNIH/National Institute of Allergy and Infectious Diseases·JournalClinical Infectious Diseases·DateFeb 9, 2009

First genome-wide expression analysis yields better understanding of how leukemia develops

A genome-wide expression analysis identified 3,005 differentially expressed genes, including a ribosome and T-cell receptor signaling pathway. The study provides critical insight into the differences between leukemic stem cells and normal blood stem cells, potentially leading to targeted therapies.

SourceUniversity of Rochester Medical Center·JournalProceedings of the National Academy of Sciences·DateFeb 9, 2009

Accidental wireless

A wireless Java-enabled system can automatically call emergency services after a rollover accident, potentially saving lives. The system uses inexpensive sensors to detect the type of accident and provides crucial information for response specialists.

SourceInderscience Publishers·JournalInternational Journal of Intelligent Defence Support Systems·DateFeb 9, 2009

Long-term use of popular inhalers increases risk of pneumonia for COPD patients

New research finds that long-term use of inhaled corticosteroid drugs increases the risk of pneumonia in patients with Chronic Obstructive Pulmonary Disease (COPD). Analysis of 18 randomized clinical trials showed a significant association between corticosteroid inhaler use and pneumonia, with nearly one in every 47 patients developing...

SourceAtrium Health Wake Forest Baptist·JournalArchives of Internal Medicine·DateFeb 9, 2009

Ongoing statin therapy associated with lower risk of death

Continuing statin therapy is associated with a reduced risk of death over four to five years, even among those without diagnosed heart disease. Patients who took statins for at least 90% of the follow-up period showed a 45% lower risk of death compared to those who did not adhere to treatment.

SourceJAMA Network·JournalArchives of Internal Medicine·DateFeb 9, 2009

MIT: Multiple genes implicated in autism

Researchers at MIT's Picower Institute for Learning and Memory found that two genes cause autism-like symptoms in mice, suggesting multiple genetic risk factors influence autistic symptoms' severity. The study may lead to drugs targeting signaling mechanisms between the two genes and a diagnostic target or biomarker.

SourceMassachusetts Institute of Technology·JournalProceedings of the National Academy of Sciences·DateFeb 9, 2009

Chronic low-back pain on the rise: UNC study finds 'alarming increase' in prevalence

A new UNC study finds that chronic low-back pain has more than doubled in North Carolina since the early 1990s, with a significant increase in prevalence across all ages and racial groups. The study suggests that increased healthcare costs for back problems may be due to rising prevalence rather than increased service use.

SourceUniversity of North Carolina Health Care·JournalArchives of Internal Medicine·DateFeb 9, 2009

Bar workers who smoke also benefit from smoking ban

Research found that bar workers' symptoms improved after a smoking ban in Scotland, with significant reductions in respiratory and sensory symptoms. The study also showed benefits for smokers themselves, highlighting the importance of addressing environmental tobacco smoke exposure at home.

SourceBMJ Group·JournalOccupational and Environmental Medicine·DateFeb 9, 2009