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Science News for February 14, 2007


Authors, illustrator win AAAS/Subaru SB&F Prize for Excellence in Science Books

Four authors and an illustrator of children's science books won the 2007 AAAS/Subaru SB&F Prize for Excellence in Science Books, recognized for promoting scientific literacy and appreciation. The winners include Dianna Aston and Sylvia Long for Children's Science Picture Book, Catherine Thimmesh for Middle Grades Nonfiction Science Boo...

2006 AAAS International Scientific Cooperation Award goes to Arizona State U. landscape ecologist

Jianguo Wu, Arizona State University landscape ecologist, received the 2006 AAAS International Scientific Cooperation Award for his outstanding contributions to sustainable science. He has made fundamental contributions to the study of grassland ecology and urban landscapes, with a focus on China's Inner Mongolia region.

Out of Africa -- bacteria, as well

A study by Max-Planck-Gesellschaft scientists finds that bacteria Helicobacter pylori spread with humans out of Africa, following similar migration paths. The genetic diversity of H. pylori is larger than man's, but paves the way for analyzing its data to understand human history.

SourceMax-Planck-Gesellschaft·JournalNature·DateFeb 14, 2007

Fatal attraction: Elephants and marula fruit

Research in Hluhluwe-Umfolozi Park, South Africa, reveals that elephants' preference for marula fruits poses a risk to female Marula trees, which are more susceptible to damage and death. The study suggests that evolution may have favored the development of trees with better resprouting abilities to counter this selective pressure.

SourceBlackwell Publishing Ltd.·JournalAfrican Journal of Ecology·DateFeb 14, 2007

New hope for regenerative medicine

Scientists at Cold Spring Harbor Laboratory have successfully used uniparental embryonic stem cells to replace blood stem cells in immunocompromised adult mice. The study demonstrates the potential of androgenetic as well as parthenogenetic ES cells for regenerative medicine applications.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateFeb 14, 2007

Disposable sensor uses DNA to detect hazardous uranium ions

Researchers at the University of Illinois have developed a simple, disposable sensor for detecting hazardous uranium ions using DNA. The sensor provides fast, on-site testing for assessing uranium contamination and remediation strategies, with detection sensitivity rivalling sophisticated laboratory instruments.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateFeb 14, 2007

New study may show how to forestall a fatal, virus-caused immune-system meltdown

Researchers at University of Texas Medical Branch have discovered a way to identify the biochemical profile of an inappropriate immune response to viral infection. The study uses a protein-scanning chip and computer database to examine over 1,200 protein interactions in guinea pigs infected with two different strains of Pichinde virus.

SourceUniversity of Texas Medical Branch at Galveston·JournalJournal of Virology·DateFeb 14, 2007

Telling the likes apart

A new key review by Gotelli and McGill provides an overview of the current status of neutral models in ecology, highlighting their role relative to older ecological models. The paper demonstrates parallels in theory development between neutral models and null models, shedding light on community patterns and species interactions.

SourceBlackwell Publishing Ltd.·JournalEcography·DateFeb 14, 2007

Study of diabetes and race reveals the imperfect science of defining ethnic groups

A new study reveals that biomedical researchers often use social and historical explanations to define race and ethnicity, rather than biological differences. The research highlights the imperfect science of defining ethnic groups and emphasizes the importance of considering structural inequalities in understanding health disparities.

SourceUniversity of California - Irvine·JournalCultural Anthropology·DateFeb 14, 2007

Living in poor neighborhoods raises risks for heart disease and stroke

A new study from Stanford University School of Medicine found that living in poor neighborhoods significantly raises the risk of heart disease and stroke. Researchers analyzed data from over 1.9 million people and found that those living in high-deprivation neighborhoods were 1.9 times more likely to experience a heart attack or stroke.

SourceStanford Medicine·JournalAmerican Journal of Preventive Medicine·DateFeb 14, 2007

Grizzly bears feast on diverse diet

A new study found that grizzly bears in the foothills of Alberta have a varied diet, eating everything from ants to moose and berries. The research team identified 40 different food items, with moose being the most common prey, and found that the bears' activity patterns vary depending on the season and environment.

SourceUniversity of Alberta·JournalJournal of Mammalogy·DateFeb 14, 2007

Studies identify DNA regions linked to nicotine dependence

Researchers have identified several genes linked to nicotine dependence, including CHRNA5 and NRXN1, which play a role in regulating communication between nerve cells. These findings could lead to the development of more effective smoking cessation therapies tailored to an individual's genetic traits.

SourceWashU Medicine·JournalHuman Molecular Genetics·DateFeb 14, 2007