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Science News for November 11, 2010


Teens' take on bullying

A Swedish study found that teenagers attribute bullying to individual characteristics, such as the bully's inner flaws and desire for power. Meanwhile, 42% of teens blamed the victim for bullying, with girls more likely to blame the bully than boys. The study has implications for bullying prevention efforts.

SourceSpringer·JournalChild & Youth Care Forum·DateNov 11, 2010

Sugar and slice make graphene real nice

Researchers at Rice University have developed a method to produce high-quality graphene using plain table sugar and other carbon-based substances. The process, which can be done in just one step, produces large-area sheets of graphene at low temperatures.

SourceRice University·JournalNature·DateNov 11, 2010

All-optical transistor

Researchers at EPFL have discovered an all-optical transistor that controls the flow of light using a novel optical microresonator. The device enables a strong 'control' laser to turn on or off a weaker 'probe' laser, opening up new possibilities for telecommunications and photonics.

Circuitry of fear identified

Neurobiologists have identified specific types of neurons in the amygdala that process fear inputs and regulate subsequent fear responses. These circuits play a key role in the generalization of fear, allowing it to become divorced from its original situation, and may provide new targets for treating phobias and anxiety disorders.

SourceFriedrich Miescher Institute·JournalNature·DateNov 11, 2010

Invasive species -- the biggest threat to fish in the Mediterranean basin

A recent study found that invasive species and over-exploitation of water resources are the biggest threats to fish in the Mediterranean basin. The researchers used data on 232 fish species and their distribution range to show that fish communities are exposed to the greatest threat of extinction when these pressures are present.

SourceSpanish Foundation for Science and Technology·JournalDiversity and Distributions·DateNov 11, 2010

Scripps Research scientists identify new mechanism regulating daily biological rhythms

Researchers have identified a novel mechanism regulating circadian rhythms that could provide a new target for treating jet lag, shift work, sleep disturbances, diabetes, obesity, and some types of cancer. The discovery offers hope for modulating the body's core clock using synthetic ligands targeting nuclear receptors.

SourceScripps Research Institute·JournalJournal of Biological Chemistry·DateNov 11, 2010

4 essays look at the next generation of bioethics

The Hastings Center Report has published four essays on the next generation of bioethics, exploring new areas such as pharmaceutical industry ethics, public health, and regenerative medicine. These essays propose broadening the approach to dying and creating a framework for teaching an aging population to prepare for death.

SourceThe Hastings Center·JournalHastings Center Report·DateNov 11, 2010

Modeling autism in a dish

Scientists successfully replicated autism in the lab using human induced pluripotent stem (iPS) cells derived from patients with Rett syndrome. The study revealed disease-specific cellular defects, such as reduced functional connections between neurons, which are reversible through insulin-like growth factor 1 (IGF-1) treatment.

SourceSalk Institute·JournalCell·DateNov 11, 2010

Graphene's strength lies in its defects

Researchers at Brown University discovered that grain boundaries in graphene do not compromise the material's strength. The critical bonds along these boundaries can be as strong as those found in pure graphene when tilted at specific angles, enabling the creation of larger sheets with improved properties.

SourceBrown University·JournalScience·DateNov 11, 2010

Additional cardiac testing vital for patients with anxiety and depression

A new study published in the Journal of Cardiopulmonary Rehabilitation and Prevention found that patients with anxiety disorders are more likely to have undetected heart problems during electrocardiogram tests. The study suggests that administering a brief questionnaire before conducting ECGs can help identify patients at risk.

SourceConcordia University·JournalJournal of Cardiopulmonary Rehabilitation and Prevention·DateNov 11, 2010

Sandia effort images the sea monster of nuclear fusion: The Rayleigh-Taylor instability

Scientists at Sandia have successfully imaged the Rayleigh-Taylor instability in fast Z-pinches, a major obstacle to harnessing nuclear fusion. The accurate simulations will enable researchers to better tweak conditions and combat the effect of the instability, potentially achieving scientific breakeven in two to three years.

SourceDOE/Sandia National Laboratories·JournalPhysical Review Letters·DateNov 11, 2010