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Science News Archive November 2011 - Page 22


Page 22 of 28

Tying molecules in knots

Researchers have successfully tied molecules into a complex pentafoil knot using self-assembly, expanding the understanding of material properties and potentially leading to new materials with improved properties. The knot is composed of just 160 atoms, approximately 16 nanometers in length.

SourceAcademy of Finland·JournalNature Chemistry·DateNov 7, 2011

Fish follow the rules to school

Researchers at Uppsala University have discovered that small lake-dwelling fish follow simple yet effective rules when schooling together. By tracking individual fish and analyzing their interactions, the team identified key movements such as slowing down near others and turning to move towards neighbors.

SourceUppsala University·JournalProceedings of the National Academy of Sciences·DateNov 7, 2011

Drospirenone-containing contraceptives linked to higher risk of blood clots

A study found that drospirenone-containing oral birth control pills are associated with a significantly increased risk of venous thrombotic events, including deep vein thrombosis and pulmonary embolism. Risk was highest in the early months of use and was also influenced by factors such as age, high blood pressure, and obesity.

SourceCanadian Medical Association Journal·JournalCanadian Medical Association Journal·DateNov 7, 2011

Web-based intervention appears ineffective for preventing weight gain in adolescents

A web-based intervention aimed at promoting healthy eating and physical activity among adolescents was found to have no long-term effects on weight gain, but did show positive short-term changes in dietary behavior. The study evaluated the effectiveness of the FATaintPHAT intervention over two years, finding it ineffective in reducing ...

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateNov 7, 2011

Researchers using new technology to study breath for toxins

A Virginia Tech research team has created a microelectromechanical system to detect trace amounts of toxins in breath on the parts per billion scale. The study aims to monitor patient exhaled breath to identify and quantify environmental exposure risks, providing valuable data for limiting harmful contaminant exposure.

SourceVirginia Tech·JournalEnvironmental Science & Technology·DateNov 7, 2011

Delaware Fire Service offers important lessons for fire prevention programs nationwide

A new study by Johns Hopkins Bloomberg School of Public Health finds that Delaware's fire service program is a model for comprehensive fire prevention. The researchers highlight the importance of community involvement, partnerships with schools and local businesses, and policy advocacy efforts to advance fire safety initiatives.

SourceJohns Hopkins Bloomberg School of Public Health·JournalJournal of Public Health Management and Practice·DateNov 7, 2011

Sowing the seeds of the obesity epidemic in babyhood

A large population-based study found that babies who rise two or more major percentiles in weight-for-length on growth charts before age 2 are more likely to be obese at age 5 and 10. The study suggests assessing weight gains during the first two years, especially in the first 6 months, to identify early risk factors for obesity.

SourceBoston Children's Hospital·JournalArchives of Pediatrics and Adolescent Medicine·DateNov 7, 2011