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Science News Archive May 2008 - Page 17


Page 17 of 22

Dying bats in the Northeast remain a mystery

The U.S. Geological Survey is investigating the cause of thousands of bat deaths in the northeastern US, with most affected species showing signs of emaciation and poor body condition. Environmental samples have been collected to determine if toxicants or secondary microbial pathogens are contributing to the illness.

Federal polar bear research critically flawed, says study in INFORMS journal

A study published in INFORMS journal Interfaces found that US polar bear research is flawed due to inadequate forecasting methodologies. The researchers concluded that the studies do not adequately support assumptions about sea ice changes and polar bears' ability to adapt, making it difficult to justify listing the species as endangered.

Combating counterfeit drugs

The US FDA has seen an 800% increase in new counterfeit cases between 2000 and 2006. Antimalarials are a particular target for counterfeiters, flooding the market in many Asian countries. Collaborative approaches involving governments, industries, and international organizations can help combat counterfeiting.

SourceThe Lancet_DELETED·JournalThe Lancet·DateMay 8, 2008

When statins aren't enough: New trial drug points to better management of coronary heart disease

Researchers found that darapladib safely and effectively lowers Lp-PLA2 activity, an enzyme associated with inflammation and increased risk for heart attack and stroke. The drug may reduce plaque inflammation and lower rates of clot formation among patients with coronary heart disease.

SourceUniversity of Pennsylvania School of Medicine·JournalJournal of the American College of Cardiology·DateMay 8, 2008

How slow growth as a fetus can cause diabetes as an adult

Research using a rat model of intrauterine growth retardation found reduced Pdx1 expression in pancreatic beta-cells throughout life following IUGR. The molecular mechanisms affecting Pdx1 expression were reversible in the fetus and after birth, but irreversible in adulthood, providing new insight into diabetes development.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 8, 2008

JCI online early table of contents: May 8, 2008

Researchers found that slow fetal growth is linked to an increased risk of developing type 2 diabetes in adulthood. They also identified a new gene mutation associated with sudden cardiac death in humans. The study used rat models and human tissue samples to understand the mechanisms behind these diseases.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 8, 2008

NCAR installs 76-teraflop supercomputer for critical research on climate change, severe weather

The National Center for Atmospheric Research (NCAR) has installed a new IBM supercomputer called Bluefire, which will accelerate research into climate change and severe weather events. The system, with a peak speed of over 76 teraflops, is expected to rank among the world's top 25 most powerful computers.

Scientists identify key roadblock to gene expression

Researchers have mapped nucleosome organization along genes in Drosophila melanogaster, revealing a critical stop sign for transcription. This discovery highlights the importance of nucleosomes in regulating gene expression and has implications for developing effective anti-viral drugs against HIV.

SourcePenn State·JournalNature·DateMay 8, 2008

Do antidepressants enhance immune function?

Researchers found that antidepressant medications increased natural killer cell activity in HIV-infected women with and without depression. The study suggests a potential link between antidepressant treatment and improved innate immunity, which could delay HIV disease progression.

SourceElsevier·JournalBiological Psychiatry·DateMay 8, 2008

Taking the sex out of sexual health screening

A study found that young Australian women would accept age-based chlamydia screening, but prefer it be offered universally, rather than based on their sexual history. The researchers suggest that detailed sexual history should not be required before testing women for chlamydia to improve screening rates and reduce stigma.

SourceBMC (BioMed Central)·JournalBMC Infectious Diseases·DateMay 8, 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.