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Science News for May 30, 2012


Drug-monitoring programs needed to cut dangers linked to 'pharmaceuticalization' of 21st century

The increasing misuse of prescription opioids has led to a four-fold rise in individual use since the mid-1990s, resulting in nearly three-quarters of fatal drug overdoses being due to prescription drugs. Experts recommend expanded prescription drug monitoring programs to identify potential abusers and protect pain patients.

SourceUniversity of Pennsylvania School of Medicine·JournalNew England Journal of Medicine·DateMay 30, 2012

Exercise and a healthy diet of fruits and vegetables extends life expectancy in women in their 70s

Women who exercise regularly and eat a diet rich in fruits and vegetables have a significantly longer life expectancy than those who don't. The study found that the most physically active and fruit/vegetable-consumption groups were eight times more likely to survive a five-year period, with death rates being up to 71% lower.

SourceWiley·JournalJournal of the American Geriatrics Society·DateMay 30, 2012

Misuse of over-the-counter pain medication is potential health threat

A recent study published in the Journal of General Internal Medicine found that nearly a quarter of adults at risk of overdosing on single OTC acetaminophen products by exceeding the dose of four grams in a 24-hour period. Additionally, nearly half were at risk of overdosing by 'double-dipping' with two acetaminophen-containing products.

SourceSpringer·JournalJournal of General Internal Medicine·DateMay 30, 2012

Electric moon jolts the solar wind

Scientists have discovered that the moon's presence affects the solar wind, creating turbulence and changes in direction and density. Computer simulations explain this phenomenon by showing an electric field near the lunar surface generated by sunlight and solar wind flow.

SourceNASA/Goddard Space Flight Center·JournalGeophysical Research Letters·DateMay 30, 2012

New materials could slash energy costs for CO2 capture

Researchers have identified dozens of zeolite minerals that can improve the energy efficiency of carbon capture technology, reducing 'parasitic energy' costs by up to 30%. The new materials could significantly enhance the feasibility of capturing CO2 from power plant emissions and storing it underground.

SourceRice University·JournalNature Materials·DateMay 30, 2012

Office bacteria all around us, especially in men's offices

A study published in PLOS ONE found that office bacteria are most abundant on chairs, phones, and human skin, with over 500 bacterial genera identified. The study also revealed that men's offices have significantly more bacteria than women's, but the diversity of communities didn't show significant differences.

SourcePLOS·JournalPLOS ONE·DateMay 30, 2012

Harvard's Wyss Institute develops nanodevice manufacturing strategy using DNA 'building blocks'

Researchers at the Wyss Institute have developed a method for building complex nanostructures out of short synthetic strands of DNA. This technology, called single-stranded tiles, can assemble themselves into precisely designed shapes and may enable the creation of new nanoscale devices for targeted drug delivery.

Belief in God associated with ability to 'mentalize'

Research finds that belief in God is associated with better theory of mind, a cognitive ability to understand others' thoughts and feelings. The study also explores the gender gap in religious belief, suggesting that women tend to be more religious than men due to differences in mentalizing abilities.

SourcePLOS·JournalPLOS ONE·DateMay 30, 2012

Marriage may make people happier

Researchers found that married people tend to be happier than single individuals, as marriage stabilizes happiness levels despite life changes. Personality traits do not play a significant role in adapting to major events like marriage or job loss.

SourceMichigan State University·JournalJournal of Research in Personality·DateMay 30, 2012

Patient mental health overlooked by physician when a family member is present

A new study found that companion presence in physician visits hinders communication for older adults with poor mental health, leading to shorter visits and less patient-centered care. The research suggests a need for greater attention to primary care infrastructure to support delivery of mental health care.

SourceJohns Hopkins Bloomberg School of Public Health·JournalJournal of General Internal Medicine·DateMay 30, 2012

New report examines effects of trees killed by bark beetles on wildfire

A recent report synthesizes published studies on the impact of bark beetles on wildfires, revealing that tree mortality can indeed affect fuels and fire behavior. However, the extent of these effects depends on various factors, including the time since the outbreak and the type of fuel or fire characteristic being studied.

SourceUSDA Forest Service - Pacific Southwest Research Station·JournalForest Ecology and Management·DateMay 30, 2012

The special scent of age

Researchers found that people can intuitively sense changes in body odor composition across the lifespan, with odors from older individuals being rated as less intense and less unpleasant. This ability is driven by specific chemical components, contrary to popular belief about old age odor.

SourcePLOS·JournalPLOS ONE·DateMay 30, 2012

When is it ethical to prescribe placebos?

A recent article in the Hastings Center Report raises questions about the AMA's policy on prescribing placebos, arguing that it may not be the best way to protect or benefit patients. The article suggests that some bioethicists argue that an undisclosed placebo is sometimes the best available treatment for certain patients.

SourceThe Hastings Center·JournalHastings Center Report·DateMay 30, 2012

Mars missions may learn from meteor Down Under

Researchers discovered that meteorites can generate methane when exposed to sunlight, which could account for a large part of Mars' atmosphere. This finding informs future Mars missions searching for life and suggests that sunlight and debris from meteorites play a role in shaping the planet's atmosphere.

SourceUniversity of Edinburgh·JournalNature·DateMay 30, 2012

When equality loses

A study by Adam Galinsky et al. suggests that team hierarchies improve efficiency and productivity due to reduced conflict and increased coordination. The research confirms the theory that all high-power individuals lead to elevated conflict, undermining group performance.

SourceAssociation for Psychological Science·JournalPsychological Science·DateMay 30, 2012

Debated: Wave-Cut or Weathering or Both?

A study suggests that subaerial chemical weathering plays a more significant role in forming rock platforms along coasts and rivers than previously thought. The researchers found that the platforms correspond to the saprock-bedrock boundary, remain within the zone of modern water table, and are weakened by wet/dry cycling.

SourceGeological Society of America·JournalGSA Today·DateMay 30, 2012

The finest gold dust in the world

Researchers at Vienna University of Technology found a special iron-oxide surface that locks single gold atoms in place, allowing them to study the chemical reactivity of individual atoms. This breakthrough could lead to more efficient catalysts, requiring less precious material.

SourceVienna University of Technology·JournalPhysical Review Letters·DateMay 30, 2012

Biochip-based device for cell analysis

Researchers at Penn State have developed a biochip-based device that can rapidly screen cells for leukemia or HIV. The device uses microfluidic drifting technology to focus particles or cells in a single stream, eliminating the need for bulky lenses and mirrors, and potentially reducing costs to $1,000 from current prices of $100,000.

SourcePenn State·JournalBiomicrofluidics·DateMay 30, 2012

Neural protective protein has 2 faces

Researchers discover that decreasing Lhx2 activity triggers glial reactivity, while increasing its activity is key to producing protective proteins. This finding holds promise for developing novel therapies for neurodegenerative diseases.

SourceJohns Hopkins Medicine·JournalProceedings of the National Academy of Sciences·DateMay 30, 2012

The special scent of age

Researchers at Monell Chemical Senses Center found that humans can identify age based on differences in body odor, with elderly individuals' odors being recognized across cultures. Evaluators rated body odors from the old-age group as less intense and less unpleasant than those from middle-aged and young individuals.

SourceMonell Chemical Senses Center·JournalPLOS ONE·DateMay 30, 2012

People know when to move on

Researchers discovered that people are equally good at finding the right balance between task completion time and reward points, regardless of task complexity. This suggests that humans may not be intrinsically bad or good at making decisions, but rather capable of adapting to different situations.

SourceAssociation for Psychological Science·JournalPsychological Science·DateMay 30, 2012

Female sex offenders protected by the criminal justice system

A recent study published in Feminist Criminology found that male and female sex offenders received significantly different sentences for the same crimes. On average, male sentences were between 6% and 31% longer than female sentences. This disparity was attributed to societal norms and gender roles.

SourceSAGE·JournalFeminist Criminology·DateMay 30, 2012

Eat healthy -- your kids are watching

A Michigan State University study suggests that lower-income mothers should adopt healthy eating habits themselves and encourage their children to eat good foods. By doing so, mothers can help create a healthier diet for their kids without using force or restrictions.

SourceMichigan State University·JournalAmerican Journal of Clinical Nutrition·DateMay 30, 2012

Tomato genome becomes fully sequenced

The tomato genome sequence provides detailed information about its genes and chromosomes, enabling researchers to improve crop yields and quality. The full genome sequence allows for faster and less expensive sequencing of other varieties, with potential applications in improving taste, nutritional content and disease resistance.

SourceCornell University·JournalNature·DateMay 30, 2012