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Science News for March 28, 2013


UCLA study finds heart failure medications highly cost-effective

A UCLA study found that heart failure medications recommended by national guidelines are highly cost-effective in saving lives and may also provide savings to the healthcare system. The combination of these medical therapies demonstrated the greatest gains in quality-adjusted life years for heart failure patients.

SourceUniversity of California - Los Angeles Health Sciences·JournalJournal of the American College of Cardiology·DateMar 28, 2013

Should I trust my intuition?

A study published in Neuron found that rats achieved optimal performance in less than 300 milliseconds, indicating that taking more time doesn't necessarily lead to better decisions. The researchers suggest that, for certain types of decisions, relying on intuition may be the most effective approach.

SourceJLM&A, SA·JournalNeuron·DateMar 28, 2013

Picking apart photosynthesis

Caltech chemists have explained one of the remaining mysteries of photosynthesis, the chemical process by which plants convert sunlight into usable energy and generate oxygen. The discovery provides a new way of approaching the design of catalysts that drive water-splitting reactions in artificial photosynthesis.

SourceCalifornia Institute of Technology·JournalNature Chemistry·DateMar 28, 2013

Sustainable fishing practices produce local rewards

Research in Papua New Guinea reveals that local community-led efforts to regulate fish catches benefit both the fishermen and their neighbors. The study found that many larvae produced by managed adults return to the same fish population, highlighting the effectiveness of cooperative management.

SourceCell Press·JournalCurrent Biology·DateMar 28, 2013

Scientists identify brain's 'molecular memory switch'

Researchers have identified a key molecule responsible for triggering chemical processes in the brain linked to memory formation. The study found that the gene CASK regulates the 'molecular memory switch', enabling it to remain active even after calcium has gone, paving the way for new therapies to reverse memory loss.

SourceUniversity of Bristol·JournalFrontiers in Neural Circuits·DateMar 28, 2013

Creating inclusive child-care spaces

A new study found that 91% of Alberta child-care centres have provided inclusive care in the previous two years. However, many still face challenges, with 36% turning away children with special needs due to capacity issues or inadequate staff training.

SourceUniversity of Alberta·JournalInternational Journal of Inclusive Education·DateMar 28, 2013

Even graphene has weak spots

Researchers found that the seven-atom ring defects at junctions in polycrystalline graphene result in reduced strength due to amplification of tension. This finding is significant for materials scientists using graphene, particularly in composite materials and stretchable electronics.

SourceRice University·JournalNano Letters·DateMar 28, 2013

Combinations of estrogen-mimicking chemicals found to strongly distort hormone action

A study by University of Texas Medical Branch at Galveston researchers found that combining low doses of multiple xenoestrogens can have a dramatically greater effect on hormone signaling than any one compound alone. The combination of bisphenol A, bisphenol S and nonylphenol was found to gang up on estradiol and thwart its response.

SourceUniversity of Texas Medical Branch at Galveston·JournalEnvironmental Health·DateMar 28, 2013

HIV antibodies that are worth the wait

Researchers have discovered that broadly neutralizing antibodies (bNAbs) can handle HIV's high mutation rate, offering a promising strategy for vaccine development. The study found that mutations in framework regions strengthened the antibodies' antiviral activity while conserving key structural features.

SourceCell Press·JournalCell·DateMar 28, 2013

Common gene variants explain 42 percent of antidepressant response

A new study published in Biological Psychiatry found that common genetic variants explain 42% of individual differences in antidepressant response, providing a significant step towards personalized treatment for depression. The research identified multiple genetic markers involved in predicting response to antidepressants.

SourceElsevier·JournalBiological Psychiatry·DateMar 28, 2013

Robot ants successfully mimic real colony behavior

A team of researchers successfully replicated the behavior of a moving ant colony using miniature robots, called Alices. The robots navigated mazes by following chemical pheromone trails and directional random walks, demonstrating that efficient navigation can be achieved with minimal cognitive abilities.

SourcePLOS·JournalPLOS Computational Biology·DateMar 28, 2013

Common -- but without a name

The newly described species, Pyropia plicata, has a distinctive growth form with pleated blades and beautiful coloration. It is highly prized by Maori in New Zealand as karengo and is also eaten worldwide for its high protein content.

SourcePensoft Publishers·JournalPhytoKeys·DateMar 28, 2013

Rise in CF patient infections explained

A recent study published in The Lancet reveals evidence for transmission of Mycobacterium abscessus between Cystic Fibrosis patients through DNA sequencing, highlighting the global spread of antibiotic-resistant bacterial species. The research team developed new measures to protect Cystic Fibrosis patients from this emerging threat.

SourceWellcome Trust Sanger Institute·JournalThe Lancet·DateMar 28, 2013

Study: 'Waste heat' may economize CO2 capture

A Rice University team has found that using waste heat can remove more CO2 from coal-fired power plant emissions economically. The researchers hope to reduce the costs of CO2 capture by creating an integrated reaction column that uses waste heat, engineered materials and optimized components.

SourceRice University·JournalInternational Journal of Greenhouse Gas Control·DateMar 28, 2013