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Science News for October 30, 2012


Sizing up biomass from space

Researchers developed a new randomization protocol to accurately estimate total biomass in forests. The GLAS approach shows promise in standardizing global forest biomass inventory and improving spatial and temporal coverage.

SourceBMC (BioMed Central)·JournalCarbon Balance and Management·DateOct 30, 2012

Animals learn to fine-tune their sniffs

Researchers found that animals can adjust their sniffs to target specific odors in complex blends. The study showed that rats learned to detect highly absorbent odors more quickly than less absorbent ones, highlighting the importance of physical properties and sniffing techniques in olfaction.

Monkeys put off sex by bystanders

A study of long-tailed macaques found that males and females inhibit the sexual behavior of group members when bystanders are present, highlighting the importance of competition in shaping their dynamics. The researchers also discovered that sneaky copulations occur due to the exploitation of peripheral positions within the group.

SourceSpringer·JournalBehavioral Ecology and Sociobiology·DateOct 30, 2012

Even physically active women sit too much

A new Northwestern University study reveals that even physically active women spend an average of nine hours a day sitting. The research suggests that incorporating light activity throughout the day can help mitigate negative health consequences associated with prolonged sitting.

SourceNorthwestern University·JournalInternational Journal of Behavioral Nutrition and Physical Activity·DateOct 30, 2012

How does the brain measure time?

Researchers at the University of Minnesota's Center for Magnetic Resonance Research found a specific region of the brain, lateral intraparietal area (LIP), that measures time consistently even without external cues. LIP activity decreased at a constant rate between timed movements, suggesting an internal hourglass mechanism.

SourcePLOS·JournalPLOS Biology·DateOct 30, 2012

How the brain controls our habits

A new study from MIT neuroscientists has found that the brain's prefrontal cortex has a small region responsible for controlling which habits are switched on at a given time. The researchers used optogenetics to inhibit this region, allowing them to break and form new habits in rats.

SourceMassachusetts Institute of Technology·JournalProceedings of the National Academy of Sciences·DateOct 30, 2012

Bullying has long-term health consequences

A study by the Crime Victims' Institute at Sam Houston State University found that childhood bullying can lead to long-term health consequences, including general and mental health issues, behavioral problems, eating disorders, smoking, alcohol use, and homelessness. The study recommends investing in victim services and effective preve...

SourceSam Houston State University·JournalJustice Quarterly·DateOct 30, 2012

Women with lupus have a higher risk for preeclampsia

Research finds women with systemic lupus erythematosus (SLE) have a two-fold increase in risk of preeclampsia. DMARD use during pregnancy may also pose a slight risk, with the severity of autoimmune disease contributing to the increased risk.

SourceWiley·JournalArthritis Care & Research·DateOct 30, 2012

E. coli adapts to colonize plants

Researchers discovered that E. coli strains can form biofilms more readily on plant surfaces, using plant-derived sugars for survival. The findings provide insights into the evolution of E. coli populations and offer targets for preventing dangerous strains from contaminating vegetables.

SourceNorwich BioScience Institutes·JournalEnvironmental Microbiology·DateOct 30, 2012