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Science News for April 16, 2008


Sudden Oak Death pathogen is evolving, says new study that reconstructs the epidemic

A new study led by UC Berkeley researchers reconstructs the Sudden Oak Death epidemic in California, tracing the pathogen's spread from its introduction to its current evolution. The study finds that nurseries played a key role in spreading the disease and that climate and environmental conditions contribute to the pathogen's mortality.

SourceUniversity of California - Berkeley·JournalMolecular Ecology·DateApr 16, 2008

Biogas production is all in the mixing

Researchers at Washington University in St. Louis have determined the importance of mixing in anaerobic digesters, which can produce biogas with manure waste, reducing greenhouse gas emissions and groundwater contamination. The study suggests that increasing mixing intensity is crucial for successful operations.

SourceWashington University in St. Louis·JournalBiotechnology and Bioengineering·DateApr 16, 2008

Older people are nation's happiest

A recent study by the University of Chicago found that happiness in America increases with age, with older adults reporting higher levels of contentment. The research also discovered that baby boomers are less happy than other generations, while economic fluctuations can impact national happiness levels.

SourceUniversity of Chicago·JournalAmerican Sociological Review·DateApr 16, 2008

Is there anybody out there?

A mathematical model suggests that intelligent life emerging on other planets is low due to the short life span of Earth. The model, developed by Prof Andrew Watson, estimates the probability of each critical step occurring as 10% or less over four billion years.

SourceUniversity of East Anglia·JournalAstrobiology·DateApr 16, 2008

Gestational age not only factor in outcome of severely premature healthy babies

A study published in New England Journal of Medicine found that female sex, antenatal corticosteroid treatment, singleton birth, and higher birth weight are equally important as gestational age in determining the care needs of these infants. The research involved nearly 4,500 infants born between 22-25 weeks gestation.

SourceUniversity of Texas Health Science Center at Houston·JournalNew England Journal of Medicine·DateApr 16, 2008

NIH study reveals factors that influence premature infant survival, disability

A new NIH study has identified several factors that influence an extremely low birth weight infant's chances for survival and disability. These factors include sex, birthweight, single birth status, and antenatal steroids, which can predict individual outcomes and help guide treatment decisions.

Muscle mass may not fully explain higher creatinine in blacks with kidney disease

Researchers found that higher creatinine levels in black patients with kidney disease cannot be explained by differences in muscle mass. The study suggests new theories are needed to account for the racial difference, which could help explain why blacks are more affected by progressive chronic kidney disease.

SourceAmerican Society of Nephrology·JournalClinical Journal of the American Society of Nephrology·DateApr 16, 2008

Breaking personal health records

Researchers develop basic framework for PHR adoption, addressing concerns around privacy and security. A comprehensive PHR can help patients become their own health advocates, access healthcare workers' opinions, and make informed decisions.

SourceInderscience Publishers·JournalInternational Journal of Healthcare Technology and Management·DateApr 16, 2008

Experiencing virtual products

Fraunhofer researchers develop a Functional DMU framework to simulate mechatronic products, enabling the evaluation of safety issues such as power windows. The virtual product can be tested with various software packages, including SimPack, Matlab/Simulink, and Dymola.

Fruit flies show how salmonella escapes immune defenses

Researchers used a transgenic fruit fly model to study how Salmonella evades immune defenses, finding that the protein AvrA shuts down key signaling pathways. This allows the bacteria to cause severe intestinal infections. The study's results suggest that other pathogens may target similar biochemical networks to avoid elimination.

SourceEmory Health Sciences·JournalCell Host & Microbe·DateApr 16, 2008

Geothermics now published by Elsevier

Geothermics shifts under Elsevier's leadership to promote geothermal resources as a sustainable energy source. The journal will continue to publish leading peer-reviewed research and critical technical reference studies in geothermal science and technology.

SourceElsevier·JournalGeothermics·DateApr 16, 2008

Study shows pine bark naturally reduces osteoarthritis

A study published in the April 2008 edition of the journal Phytotherapy Research found that Pycnogenol, an antioxidant plant extract from pine bark, significantly reduced osteoarthritis symptoms by 56% and joint pain by 55%. The treatment also improved physical function by 56% and increased patient mobility almost three-fold.

SourceMWW Group·JournalPhytotherapy Research·DateApr 16, 2008

Science expands Science Signaling, featuring research related to medical advances, and more

The American Association for the Advancement of Science (AAAS) is expanding its online journal Science Signaling, which focuses on new insights for combating disease and understanding normal human biology. Dr. Michael B. Yaffe will serve as Chief Scientific Editor, aiming to attract and publish top-notch signaling research.

Roberta goes to Europe

Roberta, a German robotics project, aims to encourage high school girls to pursue technical trades and university programs. The program has been successful, with 22 regional centers in Germany and plans for European expansion.

Measuring in 3-D

The new LensShape system enables the rapid testing of free-form geometries in aspherical lenses, reducing production time from over an hour to just 15 minutes. This innovative method uses fringe pattern analysis and machine learning algorithms to identify deviations with high accuracy.

Fast AFM probes measure multiple properties of biomolecules or materials simultaneously

Researchers developed novel probe technology that replaces conventional AFM cantilevers, enabling fast topographic imaging, quantitative material characterization, and single molecule mechanics measurements. These probes can simultaneously measure material properties like adhesion, stiffness, elasticity, and viscosity.

Slowly-developing primates definitely not dim-witted

A new study by Duke University researchers found that big-brained primates, such as humans and chimpanzees, live longer and have more complex social skills due to their larger brain size. This extended life span allows them to reproduce for a longer period, increasing their chances of survival and passing on their genes.

SourceDuke University·JournalJournal of Human Evolution·DateApr 16, 2008

Flu tracked to viral reservoir in tropics

Researchers have identified a tropical source for the influenza A virus, which infects North Americans each winter and causes an average of 36,000 deaths. The study found that two strains of the virus, H3N2 and H1N1, follow a distinct pattern in their seasonal emergence and evolution.

SourcePenn State·JournalNature·DateApr 16, 2008

Your belly fat could be making you hungrier

Researchers at the University of Western Ontario discovered that abdominal fat tissue produces a hormone called Neuropeptide Y (NPY), which stimulates fat cell production. This novel finding may lead to new therapeutic targets for combating obesity, including the development of a simple blood test to detect increased levels of NPY.

SourceUniversity of Western Ontario·JournalThe FASEB Journal·DateApr 16, 2008

Latest rheumatoid arthritis drugs compared

A recent study found that new anti-TNFα drugs are better than standard treatments for RA, with patients experiencing improved response when combined with methotrexate therapy. However, these drugs also have a higher frequency of adverse side effects, particularly at high doses.

SourceBMC (BioMed Central)·JournalBMC Musculoskeletal Disorders·DateApr 16, 2008