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Science News for February 21, 2012


Computer-assisted tools alert pediatricians to obese patients

A Kaiser Permanente study found that computer-assisted decision tools in electronic health records substantially improve the identification and diagnosis of overweight and obesity among children and adolescents. The prevalence of childhood obesity has increased sharply, with at least 18 percent of 12- to 19-year-olds now considered obese.

SourceKaiser Permanente·JournalThe Journal of Pediatrics·DateFeb 21, 2012

Promising new compound for treating stroke

Researchers have designed a new chemical compound that binds 1,000 times more effectively to the target protein in the brain than current drugs, reducing cell death by 40% in animal models. The compound also improves motor function and passes through the blood-brain barrier.

SourceUniversity of Copenhagen·JournalProceedings of the National Academy of Sciences·DateFeb 21, 2012

Does depression contribute to the aging process?

A recent study published in Biological Psychiatry found that depression is associated with shorter telomeres and a low cortisol state, suggesting that stress plays an important role in depression. The study's findings have implications for understanding the aging process and developing treatment strategies.

SourceElsevier·JournalBiological Psychiatry·DateFeb 21, 2012

Many young people don't know what constitutes sensible alcohol consumption

A recent study found that young people in England do not possess the necessary knowledge to adhere to government guidelines for responsible alcohol consumption. The researchers examined students' knowledge and beliefs about safe drinking habits and found that most respondents had incorrect or inaccurate estimates of unit content.

SourceWiley·JournalDrug and Alcohol Review·DateFeb 21, 2012

The molecular basis of touch sensation

MDC researchers have identified a crucial function of the c-Maf gene in the development of neurons responsible for mechanosensory function. In mice with deleted c-Maf, high-frequency vibrations are not detected, leading to impaired touch sensation and early-onset cataracts.

SourceHelmholtz Association·JournalScience·DateFeb 21, 2012

Wringing more energy out of everyday motions

The Duke team has created a nonlinear approach to energy harvesting that can capture more frequencies from ambient vibrations, making it ideal for practical uses in the real world. This could lead to the development of devices that power implants, sensors, and even larger electrical systems.

Caught in the act: Team discovers microbes speciating

Researchers have discovered two distinct groups of Sulfolobus islandicus bacteria speciating in a hot spring habitat, despite shared genetic material and gene exchange. The study reveals that these groups are already separate species, with differences spanning only 0.35% across the entire chromosome.

SourcePLOS·JournalPLOS Biology·DateFeb 21, 2012

Superbugs from space offer new source of power

Researchers at Newcastle University have engineered a microbial biofilm that significantly increases the electrical output of Microbial Fuel Cells. By selecting specific bacteria species, including Bacillus stratosphericus and Bacillus altitudinis, they doubled the electricity generation to 200 Watts per cubic meter.

SourceNewcastle University·JournalJournal of Environmental Science and Technology·DateFeb 21, 2012

What is the value of a green card?

A University of Nevada, Reno economist found that employer-sponsored workers on temporary visas who acquire green cards increase their annual incomes by about $11,860. This is due to the six-year wait period for green card approval and employers' willingness to hold workers over 'a barrel,' limiting job opportunities and wage growth.

SourceUniversity of Nevada, Reno·JournalDemography·DateFeb 21, 2012

Noninvasive method accurately and efficiently detects risk of Down syndrome

Scientists developed a novel biochemical assay and algorithm to detect fetal chromosomal abnormalities in maternal blood, achieving high accuracy and efficiency compared to existing methods. The new approach has the potential to reduce unnecessary invasive testing and improve screening for Down syndrome and Edwards syndrome.

SourceElsevier Health Sciences·JournalAmerican Journal of Obstetrics and Gynecology·DateFeb 21, 2012

A mechanism to improve learning and memory

Researchers discover a small protein fragment that enhances synaptic plasticity, leading to improved learning and memory in rats. The study provides new insights into the molecular mechanisms of synaptic plasticity and its manipulation for cognitive enhancement.

SourcePLOS·JournalPLOS Biology·DateFeb 21, 2012

Pitt researchers coax gold into nanowires

Researchers at the University of Pittsburgh have created a self-assembly method to grow gold nanowires, which can be used to detect poisonous gases such as hydrogen sulfide in natural gas. The gold nanowires are highly conductive and can detect gas levels comparable to existing sensing techniques.

SourceUniversity of Pittsburgh·JournalJournal of the American Chemical Society·DateFeb 21, 2012

How text messaging can help control malaria

A study published in PLOS Medicine suggests that text messaging can improve malaria control in Africa by transmitting information from the periphery to health managers, as well as supporting patient management. The authors highlight six areas where text messaging interventions can have a significant impact.

SourcePLOS·JournalPLOS Medicine·DateFeb 21, 2012

New discovery in fight against Huntington's disease

A significant scientific discovery has been made in the fight against Huntington's disease, identifying specific enzymes called HDACs as positive agents for the mutation that underlies the disorder. Blocking these enzymes with experimental drugs greatly reduces the risk of further mutation.

SourcePLOS·JournalPLOS Biology·DateFeb 21, 2012