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Science News for December 7, 2009


Childhood traumas linger as health risk factors for adults

Research from the Dunedin Multidisciplinary Health and Development Study found that childhood abuse, neglect, social isolation or economic hardship can affect nervous, immune and endocrine functioning in adulthood. Adults who experienced these traumas were more likely to exhibit depression, chronic inflammation and metabolic markers of...

SourceKing's College London·JournalArchives of Pediatrics and Adolescent Medicine·DateDec 7, 2009

Super cool atom thermometer

Researchers create a thermometer capable of measuring temperatures as low as tens of trillionths of a degree above absolute zero. By leveraging the magnetization of atoms in a magnetic field, scientists were able to extract temperature information from easily measurable properties.

SourceAmerican Physical Society·JournalPhysical Review Letters·DateDec 7, 2009

White, but not pure

Researchers detected low concentrations of polychlorinated biphenyls (PCBs) on Aconcagua Mountain, indicating that mountain ranges can trap persistent organic pollutants. The findings suggest a need to investigate the role of mountains in spreading pollutants and associated risks.

SourceHelmholtz Association·JournalEnvironmental Chemistry Letters·DateDec 7, 2009

New screening tool helps identify children at risk

A new newborn exam, the NICU Network Neurobehavioral Scale (NNNS), has been developed to identify infants at risk of developmental problems. The exam identified five distinct neurobehavioral profiles, with poor performance linked to behavior problems, school readiness issues, and low IQ.

SourceBrown University·JournalPEDIATRICS·DateDec 7, 2009

Snowflake chemistry could give clues about ozone depletion

Researchers studying snowflake shape and chemical reactions on their surface may uncover clues about ground-level ozone loss in the Arctic. The unique shapes of snow crystals, influenced by temperature and humidity, can affect the rate of chemical reactions that reduce ozone levels at ground level.

SourcePurdue University·JournalAtmospheric Chemistry and Physics·DateDec 7, 2009

December 2009 Geosphere highlights

The December 2009 Geosphere issue examines the Stateline fault along the California-Nevada border, revealing right-lateral deformation and extension. The study also investigates crystal-rich magmas of the Tuolumne batholith in the Sierra Nevada range, exploring magma chamber formation and physical processes.

SourceGeological Society of America·JournalGeosphere·DateDec 7, 2009

Emotions an overlooked key to whistle-blowing, study says

A University of Illinois study suggests that connecting with workers' emotions and personal identity can produce powerful triggers for calling out wrongdoing in the workplace. The study found that half of employees who witnessed wrongdoing on the job failed to report it due to fear of retaliation, but those who did reported being drive...

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalBusiness Ethics Quarterly·DateDec 7, 2009

Dip ordinary paper into ink infused with nanotubes and nanowires to create an instant battery

Researchers at Stanford University have developed a method to produce ultra-lightweight, bendable batteries and supercapacitors using ordinary paper coated with carbon nanotubes and silver nanowires. The paper-based energy storage devices can store and discharge electricity rapidly and are highly durable.

SourceStanford University·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

Tiny RNA has big impact on lung cancer tumors

Researchers from Yale University and Mirna Therapeutics, Inc., used a naturally occurring tumor suppressor microRNA to reverse the growth of lung tumors in mice. The study found that let-7, a type of micro-RNA, reduced tumors by 66% in mice with non-small cell lung cancer.

SourceYale University·JournalOncogene·DateDec 7, 2009

Cosmic rays hunted down

Washington University physicists are tracking down the source of cosmic rays using imaging atmospheric Cherenkov telescopes. The correlation between high cosmic-ray density and supernova rate in a starburst galaxy provides powerful evidence for supernova acceleration, long suspected to be the origin of these particles.

Antidepressant may change personality while relieving symptoms

A study found that antidepressants can change personality traits like neuroticism and extraversion while alleviating depressive symptoms. Individuals taking the medication reported significant decreases in neuroticism and increases in extraversion compared to those receiving placebo or cognitive therapy.

SourceJAMA Network·JournalArchives of General Psychiatry·DateDec 7, 2009

Fit teenage boys are smarter

Research by University of Southern California scientists found a positive association between adolescent fitness and adult cognitive performance. Fit teenage boys scored higher on intelligence tests, logical performance, and mechanical skills, while muscle strength did not have a similar impact.

SourceUniversity of Southern California·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

African computer scientists recognized

Three African scientists have been awarded the inaugural TWAS-AAS-Microsoft Award for Young Scientists for their outstanding contributions to science and development in Africa. Youcef Bentoutou, Omar Fakih Hamad, and Tshilidzi Marwala will receive a cash prize of €7,000 each.

SourceTWAS·DateDec 7, 2009

New computer model could lead to safer stents

A new computer model explains why certain drugs released from stents can cause blood clots and heart attacks, by predicting drug distribution in branched arteries. The findings could aid the FDA in its approval process for stents and lead to safer stent designs.

SourcePLOS·JournalPLOS ONE·DateDec 7, 2009

Study links factors to choice of infant sleep position

A study has identified three key factors linked to the choice of infant sleep position: physician recommendations, fear of choking, and comfort concerns. Back sleeping remains the most effective means to reduce SIDS risk, with a significant decrease in rates since the Back to Sleep campaign began.

SourceNIH/Eunice Kennedy Shriver National Institute of Child Health and Human Development·JournalArchives of Pediatrics and Adolescent Medicine·DateDec 7, 2009

Difficult childhood may increase disease risk in adulthood

A study found that individuals who experienced psychological or social adversity in childhood may develop lasting emotional, immune, and metabolic abnormalities that increase the risk of age-related diseases. Adverse childhood experiences were linked to depression, high inflammation levels, and metabolic risk factors in adulthood.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateDec 7, 2009

Study shows gene positions may aid cancer diagnosis

Researchers have identified genes that switch their nuclear position in tumor cells, offering a potential new method of diagnosing cancer. The study found that eight genes consistently relocated in the nuclei of invasive breast cancer cells, allowing for accurate diagnosis with success rates similar to current clinical tests.

SourceRockefeller University Press·JournalJournal of Cell Biology·DateDec 7, 2009

Higher risk for heart disease and diabetes associated with androgen deprivation therapy

A new study published in the Journal of the National Cancer Institute found that treatment with gonadotropin-releasing hormone agonists increases the risk of incident diabetes among men of all ages diagnosed with local or regional prostate cancer. The study also found an increased risk of cardiovascular disease, including coronary hear...

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateDec 7, 2009

Transcription factors guide differences in human and chimp brain function

Researchers found that broad differences in gene activity between humans and chimps are coordinated by about 90 transcription factors, which affect nearly 1,000 genes. This suggests a unique regulatory mechanism in the human brain that allows for larger brains and different organ functions.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

Mayo Clinic researchers prove key cancer theory

Researchers demonstrate how aneuploidy, or abnormal number of chromosomes, causes cancer by eliminating tumor suppressor genes. The findings provide a new understanding of the mechanism underlying cancer development and may lead to targeted therapies.

SourceMayo Clinic·JournalCancer Cell·DateDec 7, 2009

NRL's MISSE7 launched aboard STS-129

The experiment aims to understand the durability of advanced materials and electronics when exposed to vacuum, solar radiation, atomic oxygen, and extreme temperatures. The results will provide insights into increasing the performance and useful life of next-generation satellites and launch systems.

December 2009 Lithosphere highlights

The study examines crustal melting during continental subduction, revealing evidence of igneous diapirism and its impact on mountain belts. Researchers also investigate the weight of the Andes affecting the continental crust and correlate the Mocha fracture zone with orogenic uplift.

SourceGeological Society of America·JournalLithosphere·DateDec 7, 2009

Severity of swine flu in the United States

Researchers combined large datasets from Milwaukee and New York City to estimate swine flu severity, finding most deaths occur in non-elderly adults. The study suggests the autumn-winter pandemic wave should have a death toll only slightly higher than or lower than seasonal influenza.

SourcePLOS·JournalPLOS Medicine·DateDec 7, 2009

Playing favorites: Parents still involved after children are grown

New research from Purdue University finds that middle-aged parents help each of their grown children with many types of support every few weeks. Parents are particularly eager to help the child they consider most successful, indicating a complex dynamic where parental involvement is motivated by a desire for reflection and validation.

SourcePurdue University·JournalJournal of Marriage and Family·DateDec 7, 2009

How to read brain activity?

Researchers have found that specific waves in EEG signals can reliably predict neural activity in the brain. By combining EEG and direct neuron recordings, scientists identified a link between 'frequency band coupling' and cell firing rates.

SourceMax-Planck-Gesellschaft·JournalNeuron·DateDec 7, 2009

In cancer-ridden rats, loneliness can kill

Research at Yale University and the University of Chicago found that socially isolated female rats developed more tumors and more malignant types than their group-living counterparts. The study suggests a link between social isolation and cancer susceptibility, particularly in psychiatric disorders.

SourceYale University·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

New York autopsies show 2009 H1N1 influenza virus damages entire airway

Autopsies show that the 2009 H1N1 virus causes damage to both upper and lower respiratory tracts, with evidence of secondary bacterial infection present in over half of victims. The study also highlights the impact on younger people and the importance of identifying and treating severe infections.

SourceNIH/National Institute of Allergy and Infectious Diseases·JournalArchives of Pathology & Laboratory Medicine·DateDec 7, 2009

Microbes help mothers protect kids from allergies

Researchers found that exposure to environmental bacteria triggers a mild inflammatory response in pregnant mice, rendering their offspring resistant to allergies. This protective mechanism could potentially prevent allergies in people by conditioning the developing immune system to tolerate microbes and allergens.

SourceRockefeller University Press·JournalJournal of Experimental Medicine·DateDec 7, 2009

Facebook (and systems biologists) take note: Network analysis reveals true connections

Researchers developed a universal method to analyze complex networks, including social networks, protein-protein interactions, and air transportation networks. The method accurately predicts missing and spurious connections by averaging all possible groupings of nodes, giving each grouping a weight that reflects its explanatory power.

SourceNorthwestern University·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

Getting a 'Head Start' on obesity prevention

A Temple University study found that 70% of Head Start programs only serve non-fat milk, 94% offer vegetables daily, and 97% provide fruit daily. The program also provides over 60 minutes of unstructured physical activity per day.

SourceTemple University·JournalArchives of Pediatrics and Adolescent Medicine·DateDec 7, 2009

Don't I know you? University of Toronto research sheds light on memorial retrieval

Researchers from the University of Toronto have discovered that the hippocampus is only activated when context cues enable memory recall. This finding sheds light on the mysterious process of retrieving memories, particularly in individuals with damage to the hippocampus, such as those with Alzheimer's or Epilepsy.

SourceUniversity of Toronto·JournalProceedings of the National Academy of Sciences·DateDec 7, 2009

Improving the odds

Scientists at Weizmann Institute of Science have developed a new method for transplanting bone marrow-based stem cells from mismatched donors, restoring the immune system faster and improving cure rates for leukemia patients. The procedure involves infusing regulatory T cells into cancer patients before receiving donor stem cells, lead...

ESC press release: BMI and waist circumference

A large prospective study of over 20,000 Dutch men and women aged 20-65 found that accurately measured BMI and waist circumference can predict the risk of fatal and non-fatal cardiovascular disease. The associations between BMI and waist circumference with heart disease were equally strong, explaining half of all fatal and one quarter ...

SourceEuropean Society of Cardiology·JournalEuropean Journal of Cardiovascular Prevention & Rehabilitation·DateDec 7, 2009

A see-through surprise

Rice University Professor Junichiro Kono and his team discovered a plasmonic material that can either stop or let through terahertz beams with adjustments to temperature and/or magnetic field. This finding helps close the knowledge gap in the electromagnetic spectrum between electronic and photonic devices.

SourceRice University·JournalNature Physics·DateDec 7, 2009

The first portrait of a cool planet

Astronomers have directly imaged a faint celestial body orbiting the star GJ 758, estimated to be between 10 and 40 Jupiter masses. The discovered planet, GJ 758 B, has a temperature of around 330 degrees Celsius, making it the coldest companion of a Sun-like star ever imaged.

SourceMax-Planck-Gesellschaft·JournalThe Astrophysical Journal Letters·DateDec 7, 2009

Percentage of babies placed to sleep on their backs levels off

The rate of babies placed on their backs to sleep has plateaued since 2001, despite the Back to Sleep campaign's dramatic decrease in SIDS rates. Racial disparities persist in infant sleeping positions, with African American infants having more than twice the SIDS rate as white infants.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateDec 7, 2009