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Science News for May 7, 2008


Prisoner HIV program leads to continuum of medical care after release

The study found that 95% of participants completed the program, linking them to medical care for a year after release. This continuity of care improved health outcomes, reduced costs, and may have reduced HIV transmission. Researchers credited the use of professional social workers with the program's success.

SourceLifespan·JournalJournal of Health Care for the Poor and Underserved·DateMay 7, 2008

Power from formic acid

Researchers from Rostock have developed a feasible process for the on-demand release of hydrogen, generating it at room temperature from formic acid. The use of formic acid allows the advantages of established hydrogen/oxygen fuel cell technology to be combined with those of liquid fuels.

SourceWiley·DateMay 7, 2008

Amazon under threat from cleaner air

Climate scientists warn that reducing sulphur dioxide emissions from coal burning could lead to increased sea surface temperatures in the tropical north Atlantic, causing droughts in the Amazon rainforest. The study estimates a heightened risk of drought every other year by 2025 and nine out of ten years by 2060.

SourceUniversity of Exeter·JournalNature·DateMay 7, 2008

Obesity can increase dementia risk by up to 80 percent

Research found obesity increases dementia risk by 80%, while being underweight also poses a significant threat. The study, published in Obesity Reviews, analyzed data from over 37,000 people and estimated that 12% of dementia risk can be attributed to obesity.

SourceWiley·JournalObesity Reviews·DateMay 7, 2008

Climate models overheat Antarctica, new study finds

A new study by NCAR and Ohio State University found that climate models consistently overstate Antarctic warming, but still project significant sea-level rise due to melting ice sheets. The researchers suggest that warmer temperatures could slow down or speed up sea-level rise depending on future temperature increases.

Seagulls: Are males the weaker sex?

Researchers found that males hatch faster than females when isolated, but are disadvantaged in social environments, leading to poorer hatching conditions. Females have an upper hand in responding to environmental challenges during embryonic development.

SourceSpringer·JournalBehavioral Ecology and Sociobiology·DateMay 7, 2008

Molecular espionage shows a single HIV enzyme's many tasks

Researchers have discovered that reverse transcriptase, the target of major anti-HIV drugs, can flip between binding orientations to facilitate two distinct catalytic activities. This dynamic behavior is regulated by nonnucleoside RT inhibitors, which hinder the enzyme's ability to convert single-stranded DNA to double-stranded DNA.

SourceHarvard University·JournalNature·DateMay 7, 2008

New target for Alzheimer's disease identified

Researchers at Gladstone Institutes have found that modulating enkephalin peptides in the brain may reduce cognitive deficits seen in Alzheimer's disease. Increased levels of preproenkephalin mRNA and enkephalins in brain regions affected by AD were observed, suggesting a potential new therapy target.

Superbug genome sequenced

The genome of Steno, a newly emerging superbug, has been sequenced, revealing an organism with exceptional drug resistance. Understanding its genetic makeup may help researchers develop biochemical compounds to combat this resistance.

SourceUniversity of Bristol·JournalGenome Biology·DateMay 7, 2008

Genetic 'tag team' keeps cells on cycle

Researchers at Duke University have discovered a genetic 'tag team' that regulates the cell cycle, finding that nearly 70% of periodic genes continue to turn on and off without cyclins. The study suggests a new understanding of gene regulation in mammalian cells.

SourceDuke University·JournalNature·DateMay 7, 2008