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Science News Archive September 2011 - Page 2


Page 2 of 29

ACCF/AHA release updated guideline to promote better management of peripheral artery disease

The American College of Cardiology Foundation (ACCF) and the American Heart Association (AHA) have released an updated guideline for diagnosing and managing peripheral artery disease (PAD). The guidelines emphasize expanded criteria for using the ankle-brachial index (ABI) for earlier diagnosis and increased efforts to ensure patients ...

SourceAmerican College of Cardiology·JournalJournal of the American College of Cardiology·DateSep 29, 2011

World-first discovery 'can help save coral reefs'

A new study provides a predictive sequence of events leading to coral reef collapse and identifies key sustainability targets for managing coral reefs. Researchers found that well-protected areas typically have 1000-1500 kilos of reef fish per hectare, and regulations restricting gear or species can help maintain biomass.

SourceARC Centre of Excellence for Coral Reef Studies·JournalProceedings of the National Academy of Sciences·DateSep 29, 2011

Rensselaer engineers 'cook' promising new heat-harvesting nanomaterials in microwave oven

Researchers at Rensselaer Polytechnic Institute have developed a new way to decrease zinc oxide's thermal conductivity without reducing its electrical conductivity by adding aluminum. This innovation could lead to new technologies for harvesting waste heat and creating energy-efficient systems, such as cars, aircraft, and power plants.

SourceRensselaer Polytechnic Institute·JournalNano Letters·DateSep 29, 2011

Vicious queen ants use mob tactics to reach the top

In polygynous colonies, worker ants reinforce dominant queens by feeding and grooming them, while eliminating weaker sisters. Researchers found that inter-queen fighting involves ritualistic behavior, while workers are more aggressive, suggesting a complex reproductive strategy to maintain queen dominance.

SourceBMC (BioMed Central)·JournalBMC Ecology·DateSep 29, 2011

Climate change will show which animals can take the heat

A new study examines the impact of climate change on amphibian species, finding that rapid temperature swings can trap species at different points in their travels. The research suggests that many species will become endangered due to their inability to tolerate unfavorable climate conditions for extended periods.

SourceBrown University·JournalEcology Letters·DateSep 29, 2011

Red wine ingredient resveratrol stops breast cancer growth

Researchers discovered that resveratrol blocks the growth of breast cancer cells by reducing estrogen receptor levels. This finding has significant implications for treating women with breast cancer whose tumors develop resistance to hormonal therapy. Resveratrol may serve as a potential tool to combat hormone-resistant breast cancer.

Not quite 'roid rage

A new study reveals that fruit fly aggression is correlated with smaller brain parts and involves complex interactions between networks of important genes. The findings also show that certain portions of the fly brain affected by hyper-aggressive flies, and that calming did not necessarily come through chemistry.

SourceNorth Carolina State University·JournalProceedings of the National Academy of Sciences·DateSep 29, 2011

Koalas' bellows boast about size

Researchers found that male koalas produce lower resonances in their bellows, which may be related to the length of their vocal tracts. The team also discovered that koalas can make themselves sound larger than they are by using simultaneous resonance in their oral and nasal tracts.

SourceThe Company of Biologists·JournalJournal of Experimental Biology·DateSep 29, 2011

Roads pave the way for the spread of superbugs

A recent study found that villages along roads have higher rates of antibiotic-resistant E. coli than rural areas, suggesting roads facilitate the spread of superbugs. The researchers attribute this to increased antibiotic use and poor water quality, which allow resistant strains to thrive.

SourceUniversity of Michigan·JournalJournal of The Royal Society Interface·DateSep 29, 2011

'Back-up system' reduces heart disease deaths

Researchers found that patients with well-developed coronary collaterals have a 36% reduced risk of mortality from heart disease. The study suggests promoting natural bypass vessels through lifestyle factors and potential treatments, such as external counterpulsation or injections with growth factor G-CSF.

SourceUniversity College London·JournalEuropean Heart Journal·DateSep 29, 2011

Baseball's winning formula

A University of Delaware professor found hitting accounts for more than 45% of teams' winning records, fielding for 25%, and pitching also for 25%. The impact of stolen bases is greatly overestimated in baseball winning percentages.

SourceUniversity of Delaware·JournalJournal of Quantitative Analysis in Sports·DateSep 29, 2011

Scientists discover the proteins that control development of varicose veins

Scientists have identified a protein that controls the development of varicose veins, offering new hope for prevention and treatment. By inhibiting this protein, researchers were able to stall the progression of varicose veins and reduce the need for surgery, potentially improving quality of life for those affected.

Physicists consider their own carbon footprint

Physicists are being called on to take action against climate change by reducing their own carbon footprints. By changing behavior at the individual level and carefully planning future experiments, physicists can contribute to a more sustainable energy supply.

SourceIOP Publishing·JournalPhysics World·DateSep 29, 2011

Redefining the kilogram and the ampere

Scientists have made precise measurements of the quantum Hall effect in graphene, supporting the redefinition of the kilogram and ampere. This breakthrough aims to establish a universal and stable definition for these fundamental constants, linking them to natural quantities.

SourceNational Physical Laboratory·JournalNew Journal of Physics·DateSep 29, 2011