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Science News for September 15, 2011


Rice reinforces gas hydrate strategy

Researchers at Rice University have developed a method to pinpoint the amount of methane hydrates trapped under the seabed using shallow core samples. The technique, which analyzes transition zones between methane and sulfate, can aid in selecting deep drilling sites for expensive exploratory drilling.

The turbulent lives of stars

Researchers have detected stellar oscillations in a hotter star, revealing insights into its internal structure and composition. The discovery was made possible by the Kepler space telescope and provides new information on the processes that govern stellar behavior.

SourceUniversity of Vienna·JournalNature·DateSep 15, 2011

Biochemical cell signals quantified for first time

Researchers at Emory and Johns Hopkins universities have quantified the data capacity of a biochemical signaling pathway for the first time, finding that it is significantly lower than expected. The study suggests that cells may use alternative methods to communicate when their primary pathways are insufficient.

SourceEmory Health Sciences·JournalScience·DateSep 15, 2011

How the Milky Way got its spiral

A supercomputer simulation by University of Pittsburgh researcher Christopher W. Purcell suggests that the Milky Way's spiral arms were triggered by a collision with the Sagittarius Dwarf galaxy. The impact stripped off 80-90% of the dark matter halo, producing instabilities that eventually formed the spiral arms and ring structures.

SourceUniversity of Pittsburgh·JournalNature·DateSep 15, 2011

Notre Dame researchers demonstrate antibiotic sensing event central to MRSA antibiotic resistance

Researchers at the University of Notre Dame have identified a critical mechanism in methicillin-resistant Staphylococcus aureus (MRSA) resistance to beta-lactam antibiotics. The 'lysine N-decarboxylation switch' process, facilitated by protein BlaR1, enables MRSA to conserve resources until it detects an antibiotic threat.

SourceUniversity of Notre Dame·JournalJournal of Biological Chemistry·DateSep 15, 2011

Common invasive test not necessary for kidney disease patients

A new study suggests that equations estimating kidney function can work as well as direct measurements, allowing patients with chronic kidney disease to avoid painful and invasive procedures. The study found that kidney function estimates linked as tightly to complications as direct measurements, refuting the conventional view that dir...

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateSep 15, 2011

Archivist in the sound library

Scientists at LMU Munich developed a mathematical model that accurately mimics human sound recognition, showing the brain compares stored and perceived sounds efficiently. The new library-based model predicts the flow of information from cerebrum to thalamus, enabling highly efficient real-time implementation.

Of mice and men

Scientists sequenced genomes of 17 common lab mouse strains to advance genetic studies of human diseases. The study revealed striking variations in strain relationships across the genome, highlighting the importance of genomic information for comparing species.

Two-thirds of hepatitis C patients can see a cure in half the time, new study finds

A new study published in the New England Journal of Medicine found that approximately two-thirds of patients with hepatitis C can be cured in six months, rather than the standard 48-week treatment. The study showed that response-guided therapy is a successful strategy for individualizing treatment based on patient responses.

SourceCedars-Sinai Medical Center·JournalNew England Journal of Medicine·DateSep 15, 2011

MU researchers unveil new method for detecting lung cancer in Nature article

Researchers at the University of Missouri have developed a nanotechnology sensor that can detect lung cancer in blood plasma with high sensitivity and selectivity. This technology could provide an earlier warning signal, potentially saving lives. The sensor detects changes in a specific microRNA molecule associated with lung cancer.

SourceUniversity of Missouri School of Medicine·JournalNature Nanotechnology·DateSep 15, 2011

Estrogen treatment may help reverse severe pulmonary hypertension

Researchers at UCLA found that estrogen treatment can reverse the progression of pulmonary hypertension to heart failure and restore lung and ventricle structure and function. The study suggests that even short-term estrogen therapy may suffice to reverse the disease, offering new potential therapeutic applications for human patients.

SourceUniversity of California - Los Angeles Health Sciences·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateSep 15, 2011

Plants create a water reserve in the soil

Researchers at the Paul Scherrer Institute discovered that plants create a water reserve around their roots, which helps them survive short periods of drought. The water reserve is found within a few millimeters from the roots and contains about 30% more water than the rest of the soil.

SourceHelmholtz Association·JournalNew Phytologist·DateSep 15, 2011

Moffitt researchers find possible key to preventing chemotherapy resistance in ovarian cancer

Researchers at Moffitt Cancer Center have identified a molecular pathway that may play a key role in the evolution of chemotherapy resistance in ovarian cancer. The 'BCL2 antagonist of cell death' (BAD) pathway shows promise as a biomarker to identify patients with high-risk ovarian cancer and potentially reverse chemo-resistance.

SourceH. Lee Moffitt Cancer Center & Research Institute·JournalClinical Cancer Research·DateSep 15, 2011

Childhood and the driving force of fashion

Research by Dr Jane Pilcher at the University of Leicester found that brands and logos are highly important to some children, shaped by family culture and peer influences. However, Dr Pilcher emphasizes that childhood remains distinct from adolescence, with parents exerting control over their children's consumption.

SourceUniversity of Leicester·JournalChildhood·DateSep 15, 2011

In rapidly warming seas, some fish lose while others gain

A new study reveals that warming seas are changing the composition of fish communities in the northeast Atlantic, with southerly species dominating and colder species declining. The analysis of data from over a million fish across 28 years shows a significant increase in warm-water species and a decrease in cold-adapted species.

SourceCell Press·JournalCurrent Biology·DateSep 15, 2011