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Science News for June 12, 2013


Researchers identify a new mechanism of TB drug resistance

Researchers at Johns Hopkins Bloomberg School of Public Health have identified a new mechanism of PZA drug resistance, which could lead to the development of new antibiotic therapies. The study found that mutations in the panD gene may also be involved in PZA resistance, providing new insight into how this mysterious drug works.

SourceJohns Hopkins Bloomberg School of Public Health·JournalEmerging Microbes & Infections·DateJun 12, 2013

Data highways for quantum information

Researchers at Vienna University of Technology have demonstrated experimentally that ultra-thin glass fibers can store quantum information long enough to be used for entangling atoms hundreds of kilometers apart. This is a fundamental building block for a global fiber-based quantum communication network.

SourceVienna University of Technology·JournalPhysical Review Letters·DateJun 12, 2013

Fraternal singing in zebra finches

Young zebra finches can learn their fathers' songs via their brothers, and this learning process is similar to human speech acquisition. The study found that juvenile siblings with no father exposure learned the same song as those exposed to a brother's song for a short period.

SourceMax-Planck-Gesellschaft·JournalBiology Letters·DateJun 12, 2013

More A&E visits where access to GPs is worse

Researchers at Imperial College London found that patients with timely access to GP appointments made fewer A&E visits. The study analyzed data from a national survey of patients' experiences of GP practices in 2010-11, revealing a 10.2% lower rate of A&E visits for the best-accessed practices compared to those with the worst access.

SourceImperial College London·JournalPLOS ONE·DateJun 12, 2013

Preparing for the next megathrust

A new study analyzes geologic records to predict megathrust earthquakes along Canada's west coast. The research identified 22 earthquake shaking events over the past 11,000 years, with a recurrence interval of about 500 years. This study helps Canadian coastal communities improve hazard assessments and emergency preparedness plans.

SourceCanadian Science Publishing·JournalCanadian Journal of Earth Sciences·DateJun 12, 2013

Cultural products have evolutionary roots

According to Concordia University professor Gad Saad, the drive to consume is rooted in a shared biological heritage. He found that four key Darwinian factors - survival, reproduction, kin selection, and reciprocal altruism - shape narratives in consumer products like movies and song lyrics.

SourceConcordia University·JournalJournal of Consumer Psychology·DateJun 12, 2013

Obstructive sleep apnea raises risk of sudden cardiac death, Mayo Clinic finds

A recent study published in the Journal of the American College of Cardiology found that obstructive sleep apnea is associated with a significantly higher risk of sudden cardiac death. The study, which followed over 10,700 participants for an average of 5.3 years, revealed that people with sleep apnea were almost twice as likely to exp...

SourceMayo Clinic·JournalJournal of the American College of Cardiology·DateJun 12, 2013

Alzheimer's brain change measured in humans

Researchers found that people with inherited Alzheimer's disease produce 20% more of a specific form of amyloid beta, known as amyloid beta 42. Additionally, the protein drops out of cerebrospinal fluid more quickly in mutation carriers, suggesting a link to brain amyloid plaques.

SourceWashU Medicine·JournalScience Translational Medicine·DateJun 12, 2013

Water is no lubricant

Researchers used the Secondary Ion Mass Spectrometer to examine the role of water in single olivine crystals at the near-atomic scale. The study found that water has a much lower effect on the mechanical weakening of olivine, challenging earlier concepts about its lubricating properties.

SourceHelmholtz Association·JournalNature·DateJun 12, 2013

Filmmaking magic with polymers

A team of researchers led by Gupreet Singh has devised a method to assemble self-assembled copolymer block films with nanostructures, enabling multiple functions and flexibility on a macroscale level. The films can be embedded with nanoparticles for various applications, including data storage and water purification.

SourceUniversity of Akron·JournalACS Nano·DateJun 12, 2013

Life underground

Researchers at University of Delaware and Woods Hole Oceanographic Institution found evidence of active bacteria, fungi and other microscopic organisms at depths deeper than a skyscraper is high. The microbes are reproducing, digesting food and moving around despite extreme conditions.

SourceUniversity of Delaware·JournalNature·DateJun 12, 2013

Resilience in trying times -- a result of positive actions

A new study by John Helliwell and colleagues found that communities with better social capital and pro-social behaviors are more resilient during crises, leading to improved happiness. The research suggests that social trust and quality social networks play a crucial role in mitigating the impact of economic shocks.

SourceSpringer·JournalJournal of Happiness Studies·DateJun 12, 2013

Swiss ball improves muscle strength and walking performance in ankylosing spondylitis

A study presented at EULAR 2013 found that a progressive muscle strengthening programme using a Swiss ball significantly improves functional capacity, muscle strength, and mobility in patients with Ankylosing Spondylitis. The programme also showed no harmful effects on disease activity, leading to improved treatment satisfaction.

Laws help limit junk foods in schools

A study published in JAMA Pediatrics found that laws and district policies limiting sugar content in foods reduced sweets sales to 32.3% of schools. The availability of sugar-sweetened beverages decreased significantly, with only 3.6% of schools with a ban compared to 13.1% without one.

SourceUniversity of Illinois Chicago·JournalJAMA Pediatrics·DateJun 12, 2013

Infants express non-verbal sympathy for others in distress

Researchers found that 10-month-old infants preferentially reach for the victim rather than the aggressor in an animated sequence test. This suggests that infants may exhibit rudimentary sympathy toward others in distress based on their evaluation of roles in interactions.

SourcePLOS·JournalPLOS ONE·DateJun 12, 2013

Turtles watch for, snack on gelatinous prey while swimming

Researchers found that loggerhead turtles rely on sight to identify and move towards gelatinous, floating prey like jellyfish and other organisms. They can snack on these low-energy foods approximately twice every hour, suggesting they may rely on such prey for energy more than previously thought.

SourcePLOS·JournalPLOS ONE·DateJun 12, 2013

Moving iron in Antarctica

A new study at Georgia Tech suggests that diatoms stuff more iron into their silica shells than needed, limiting its availability and reducing productivity. This can negatively affect the ecosystem, including plankton production and competition for iron.

SourceGeorgia Institute of Technology·JournalNature Communications·DateJun 12, 2013

Hot flashes before menopause? It can happen

A study of 1,500 women reveals that hot flashes and night sweats can occur before menopause, particularly among white women, Asian women, and those with certain dietary habits. The findings shed light on the complex factors influencing midlife symptoms and provide reassurance for women experiencing unexpected hot flashes.

Hands-free talking and texting are unsafe

A new study by the University of Utah found that hands-free devices can overload drivers' attention and impair their ability to drive safely. The study used advanced metrics to assess driver mental workload and reaction time, revealing a five-fold increase in infotainment systems in new vehicles by 2018

NYC-style cap on soda size would target the overweight, not the poor

A new study by Columbia University's Mailman School of Public Health suggests that restricting large sugar-sweetened beverages in food service establishments would primarily affect overweight individuals, including teenagers. The proposed restrictions aim to reduce obesity, which is linked to excess calories from sugary drinks.

SourceColumbia University's Mailman School of Public Health·JournalAmerican Journal of Clinical Nutrition·DateJun 12, 2013