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Science News for August 15, 2007


UA physicists discover 'super crystals' in a semiconductor

University of Arizona physicists have discovered 'super crystals' in certain organic semiconducting solids, which could create splashes of current and exhibit unique electrical properties. This discovery was made possible by analyzing experimental data from a previous study on a mysterious solid-state phase in a semiconductor.

SourceUniversity of Arizona·JournalPhysical Review Letters·DateAug 15, 2007

Birth records hold pancreatic cancer clue

Research suggests women with a history of gestational diabetes are at higher risk of developing pancreatic cancer. A study of over 37,000 mothers who gave birth in Jerusalem between 1964 and 1976 found five cases of pancreatic cancer among those with gestational diabetes.

SourceBMC (BioMed Central)·JournalBMC Medicine·DateAug 15, 2007

New target for anti-flu drug development

Scientists at Cure Lab, Inc. have identified a new target for the development of anti-influenza drugs, specifically the M2 protein, which may be responsible for killing human cells. This discovery has the potential to lead to a new generation of medicines that can complement existing treatments for influenza.

SourceCure Lab, Inc.·JournalCell Cycle·DateAug 15, 2007

High pollution linked to poor lung function growth in children in Mexico City

A three-year study measured lung function growth in 3,170 eight-year-old children in Mexico City, finding significant deficits in children exposed to higher levels of air pollutants. The effects of long-term exposure on lung health are associated with increased risk of chronic obstructive lung disease and cardiovascular morbidity.

SourceAmerican Thoracic Society·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateAug 15, 2007

Ocean 'supergyre' link to climate regulator

Researchers confirm the existence of a 'supergyre' connecting the three Southern Hemisphere ocean basins, which plays a crucial role in governing global climate. The Tasman Outflow, occurring at an average depth of 800-1,000m, may influence the response of the thermohaline circulation to climate change.

SourceCSIRO Australia·JournalGeophysical Research Letters·DateAug 15, 2007

Deep into the machinery of adult fragile X

Fragile X tremor/ataxia syndrome (FXTAS) is a recently identified neurological disorder affecting middle-aged adults, causing Parkinson's-like symptoms and cognitive decline. Researchers discovered that the mutation causing FXTAS triggers a failure of messenger RNA transport within neurons, leading to lethal clogging of brain cells.

SourceCell Press·JournalNeuron·DateAug 15, 2007

HIV is a 'double hit' to the brain

The HIV/AIDS virus affects adult neural progenitor cells in the brain, preventing them from dividing and contributing to neurodegeneration. The protein gp120 causes both brain injury and prevents its repair, highlighting a potential target for new therapies.

SourceCell Press·JournalCell Stem Cell·DateAug 15, 2007

Emerging (disease) markets

Wildlife experts from WCS and FAO argue that keeping wild animals separate in wildlife markets can prevent disease outbreaks. Closing these trade hubs could significantly reduce the threat of emerging diseases like avian flu.

SourceWildlife Conservation Society·JournalJournal of Wildlife Diseases·DateAug 15, 2007

Air pollution linked to cardiovascular risk indices in healthy young adults

Researchers found that urban air pollution increases indices of cardiovascular risk, including inflammation, oxidative stress, coagulation, and autonomic dysfunction, in healthy Taiwanese college students. The study suggests a link between air pollution and systemic inflammation/oxidative stress in young adults.

SourceAmerican Thoracic Society·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateAug 15, 2007

AIDS interferes with stem cells in the brain

HIV/AIDS interferes with stem cells in the adult brain, preventing new nerve cells from forming, which is a key feature of AIDS dementia. The researchers discovered a novel molecular mechanism that inhibits stem cell proliferation, possibly triggered in other neurodegenerative diseases as well.

SourceSanford Burnham Prebys·JournalCell Stem Cell·DateAug 15, 2007

Fat still on the children's menu

Research suggests that children can safely consume fat as part of a healthy diet, contrary to concerns over obesity. Children's bodies are more efficient at burning fat relative to energy expenditure due to their high growth rates and higher protein synthesis needs.

SourceBMC (BioMed Central)·JournalNutrition Journal·DateAug 15, 2007