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Science News for December 2, 2011


Simultaneous ice melt in Antarctic and Arctic

A recent study published in Science reveals that the Antarctic and Arctic ice sheets experienced simultaneous melting 19,000 years ago. This finding suggests that Antarctica was not as climatically isolated as previously thought, with the two hemispheres reacting more closely to climate change.

SourceHelmholtz Association·JournalScience·DateDec 2, 2011

Engineering cartilage replacements

Researchers at Case Western Reserve University developed a method to engineer cartilage replacements using mesenchymal stem cells and tiny beads filled with growth factor. The new approach showed promising results in creating thicker, stiffer cartilage than previous methods.

SourceCase Western Reserve University·JournalJournal of Controlled Release·DateDec 2, 2011

Are doing harm and allowing harm equivalent? Ask fMRI

Researchers used fMRI scans to investigate moral judgments, finding that people make automatic distinctions between active and passive harms. The study suggests that allowing harm by failing to act requires more deliberate thinking, unlike actively causing harm which triggers an immediate response.

SourceBrown University·JournalSocial Cognitive and Affective Neuroscience·DateDec 2, 2011

Scalable amounts of liver and pancreas precursor cells created using new stem cell production method

Researchers in Canada have developed a technique to produce large quantities of endoderm cells from human pluripotent stem cells, overcoming a key hurdle in regenerative medicine. The method allows for significant increases in effective cell production, enabling the potential for regenerative treatments for diabetes and liver disease.

SourceWiley·JournalBiotechnology and Bioengineering·DateDec 2, 2011

Instant nanodots grow on silicon to form sensing array

Researchers create square arrays of highly reproductive three-dimensional silicon oxide nanodots in seconds, opening the door for biosensors and genomics applications. They used atmospheric pressure plasma-enhanced chemical vapour deposition to achieve precise ordering of nanodots on an array.

SourceSpringer·JournalThe European Physical Journal D·DateDec 2, 2011

Asthma rates double for WTC first responders

A study published in The American Journal of Industrial Medicine found that WTC first responders suffer from asthma at more than twice the rate of the general U.S. population, with rates doubling between 2002 and 2005. Researchers tracked 20,834 responders who received medical screenings from 2002 to 2007, comparing their results to US...

SourceNorthwell Health·JournalAmerican Journal of Industrial Medicine·DateDec 2, 2011