Add BrightSurf on Google Email

Science News Archive December 2011 - Page 5


Page 5 of 23

Sleep disorders common among police officers

A study found that 40% of police officers have a sleep disorder, such as obstructive sleep apnea or insomnia, which can lead to adverse health and safety outcomes. The study also showed that positive screening for any sleep disorder was associated with increased risk of depression, burnout, and accidents while driving.

SourceJAMA Network·JournalJAMA·DateDec 20, 2011

Nanometer-scale growth of cone cells tracked in living human eye

Researchers at Indiana University have developed a method to measure microscopic changes in cone cells using optical coherence tomography (OCT) phase differences. They found the outer segments of cone cells grow at a rate of about 150 nanometers per hour, which is significantly faster than human hair growth.

SourceOptica·JournalBiomedical Optics Express·DateDec 20, 2011

Do you see what I see?

A team of researchers developed a computer model based on human neural structure and function to recognize shapes. The model, inspired by the hierarchical organization of the human visual cortex, successfully reproduced human performance in identifying shapes, opening up new ways to approach object detection problems.

SourceDOE/Los Alamos National Laboratory·JournalPLOS Computational Biology·DateDec 20, 2011

Are the anxious oblivious?

A Tel Aviv University study found that anxious people are less stimulated by fear-inducing images than non-anxious individuals, suggesting an under-reaction to subtle threatening stimuli. This leads to a 'surprise' reaction to fearful stimuli that non-anxious individuals have already subconsciously noticed and evaluated.

SourceAmerican Friends of Tel Aviv University·JournalBiological Psychology·DateDec 20, 2011

New take on impacts of low dose radiation

Researchers at Berkeley Lab found evidence of non-linear DNA damage response to low dose radiation, suggesting a non-proportional relationship between dose and cancer risk. The study used time-lapse live imaging to observe the formation of DNA repair centers, which may be an optimal way for cells to deal with sparse damage.

SourceDOE/Lawrence Berkeley National Laboratory·JournalProceedings of the National Academy of Sciences·DateDec 20, 2011

Mediterranean diet gives longer life

A Mediterranean diet rich in vegetables and fish is associated with a 20% increased chances of living longer, according to a Swedish study that followed 70-year-olds for over 40 years. The H70 study found that those who consumed more meat and animal products had a lower chance of survival.

SourceUniversity of Gothenburg·JournalAGE·DateDec 20, 2011

Breastfeeding saved babies in 19th century Montreal

Research from Concordia and McGill universities found that breastfeeding protected infants from contaminated food and water, while also postponing the arrival of siblings, leading to improved maternal and child health. French-Canadian children who were weaned earlier faced a disproportionate number of deaths.

SourceConcordia University·JournalPopulation Studies·DateDec 20, 2011

Forest health versus global warming: Fuel reduction likely to increase carbon emissions

A new study published in Frontiers in Ecology and the Environment found that forest thinning to prevent or reduce severe wildfires releases more carbon into the atmosphere than saved by successful fire prevention. The research analyzed the effect of fuel treatments on wildfire and carbon stocks in several scenarios, concluding that eve...

SourceOregon State University·JournalFrontiers in Ecology and the Environment·DateDec 20, 2011

NPL models the extracellular matrix

Scientists at NPL developed a functional model of the native extracellular matrix, providing structural support for cells to aid growth and proliferation. The model could lead to advances in regenerative medicine by mimicking the complex nano-to-microscale structure of the ECM.

SourceNational Physical Laboratory·JournalAngewandte Chemie·DateDec 20, 2011

Frankincense production 'doomed' warn ecologists

Ecologists warn that frankincense production could be halved in the next 15 years as Boswellia tree populations decline dramatically. The study found that factors other than tapping, such as fire, grazing, and insect attacks, are contributing to the decline.

SourceWiley·JournalJournal of Applied Ecology·DateDec 20, 2011

Estimating global malaria incidence

A study estimates global malaria incidence to be 225 million episodes worldwide in 2009, using routine surveillance data. The authors find that accurate surveillance is essential for monitoring progress towards the United Nations' Millennium Development Goals and controlling malaria outbreaks.

SourcePLOS·JournalPLOS Medicine·DateDec 20, 2011

ESC calls for European studies exploring readmissions to hospital following PCI

The European Society of Cardiology emphasizes the importance of measuring rates of rehospitalization following percutaneous coronary intervention (PCI) procedures. A US study found that 12.4% of PCI patients need unplanned readmissions, highlighting the need for improvements in care and better data in Europe.

SourceEuropean Society of Cardiology·JournalJournal of the American College of Cardiology·DateDec 19, 2011

Brain function - A new way to measure the burden of aging across nations

A new study measures brain function to assess the impact of aging on a nation's economy. Cognitive function is found to be a better indicator of the burden of aging than chronological age. The study suggests that education, nutrition, and health standards are key factors in maintaining cognitive ability across nations.

SourceInternational Institute for Applied Systems Analysis·JournalProceedings of the National Academy of Sciences·DateDec 19, 2011

New insight into why locusts swarm

A protein linked to learning and memory plays a crucial role in driving desert locusts from harmless grasshoppers to destructive swarms. Researchers discovered that this protein acts as a molecular switch in social feedback loops, triggering the locusts' gregarious behavior.

SourceUniversity of Cambridge·JournalProceedings of the National Academy of Sciences·DateDec 19, 2011

Chemicals and biofuel from wood biomass

Aalto University researchers have developed a new bioprocess that uses only lignocellulose from wood biomass to produce chemicals and biofuel. This process avoids wasting any parts of the wood sugar and can be used in existing combustion engines without modifications.

SourceAalto University·JournalBioresource Technology·DateDec 19, 2011