News tagged with ratchet
Uncovering how cells cover gaps (w/ Video)
Jun 26, 2009 |
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Researchers at the European Molecular Biology Laboratory (EMBL) in Heidelberg, Germany, came a step closer to understanding how cells close gaps not only during embryonic development but also duringwound healing. ...
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New method separates cancer cells from normal cells
Jun 15, 2009 |
4.2 / 5 (6) |
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The vast majority of cancer deaths are due to metastasis, the spread of cancer cells from its primary site to other parts of the body. These metastatic cells tend to move more than their non-metastatic variants but this movement ...
Ratchet-like genetic mutations make evolution irreversible
Sep 23, 2009 |
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(PhysOrg.com) -- A University of Oregon research team has found that evolution can never go backwards, because the paths to the genes once present in our ancestors are forever blocked. The findings -- the ...
Toward new drugs that turn genes on and off
Jun 04, 2009 |
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Scientists in Michigan and California are reporting an advance toward development of a new generation of drugs that treat disease by orchestrating how genes in the body produce proteins involved in arthritis, ...
Winning While Losing: New Strategy Solves 'Two-Envelope' Paradox
Aug 18, 2009 |
3.6 / 5 (34) |
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(PhysOrg.com) -- Researchers from Australia have taken a step toward resolving a seemingly simple yet unsolved paradox known as the "two-envelope" problem. They’ve worked out a new strategy that can enable ...
Molecular machine turns packaged messenger RNA into a linear transcript
Biology /
Feb 11, 2009 |
5 / 5 (1) |
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For RNA, the gateway to a productive life outside the nucleus is the nuclear pore complex, an amalgamation of 30 kinds of proteins that regulates all traffic passing through the nuclear membrane. New research from Rockefeller ...
Scientists solve gravity-defying bird beak mystery
May 15, 2008 |
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As Charles Darwin showed nearly 150 years ago, bird beaks are exquisitely adapted to the birds' feeding strategy. A team of MIT mathematicians and engineers has now explained exactly how some shorebirds use ...
Physics and biology team up to tackle protein folding debate
Physics /
Apr 04, 2006 |
4.4 / 5 (5) |
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A team of researchers from EPFL, (Ecole Polytechnique Fédérale de Lausanne), the University of Lausanne, Northwestern University and Tel Aviv University bring biology and statistical physics together to answer the question ...
Nanomolecular motor spins on a surface
Oct 26, 2005 |
3.6 / 5 (9) |
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Netherlands scientists say they've developed the first molecular motor that rotates in just one direction while attached to a solid surface.
Mice teeth explain the troubles with human wisdom teeth
Biology /
Sep 26, 2007 |
4.1 / 5 (7) |
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During evolution, many of a species’ properties are shaped by ecological interactions. This is readily evident in mammalian teeth, whose many features closely reflect what each species eats. However, for a long time scientists ...
Caribbean, Gulf spared widespread coral damage
Nov 06, 2009 |
3 / 5 (2) |
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(AP) -- Lower-than-feared sea temperatures this summer gave a break to fragile coral reefs across the Caribbean and the central Gulf of Mexico that were damaged in recent years, scientists said Thursday.
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