Monday, January 28, 2013

MC2 Post 1506 When Science Is Stranger than Science Fiction


What Holds Chromosomes Together: Researchers Elucidate the  
Structure of DNA-Packaging Proteins


January 28, 2013


From:   http://phys.org/news



In each cell about two meters of DNA must fit into a cell nucleus that has a diameter of only a few thousandths of a millimeter. There the DNA is organized in individual chromosomes in the form of very long filaments. If they are not equally and accurately distributed to the daughter cells during cell division, this can result in cancer or genetic defects such as trisomy 21. Therefore, to ensure safe transport of DNA during cell division the long and coiled DNA fibers must be tightly packed.


Learning from Bacteria





 
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Researchers Break Million-Core Supercomputer Barrier



From:  http://phys.org


Stanford Engineering's Center for Turbulence Research (CTR) has set a new record in computational science by successfully using a supercomputer with more than one million computing cores to solve a complex fluiddynamics problem—the prediction of noise generated by a supersonic jet engine.






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Can Dark Energy be explained by

Symmetrons?


From:  http://phys.org

(Phys.org)—A field that permeates the universe and gives rise to a new force, or "fifth force," between massive objects may be a candidate for dark energy and an explanation for why the expansion of the universe is accelerating. This field, called the symmetron field, is so named because it has a symmetry in regions of high density, while in regions of low density, such as a vacuum, the symmetry is broken and the field mediates the new force.







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