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Using quantum mechanics to beat the classical precision limit

The hands of a clock tell the whole story. Technical factors place limits on the precision of the reading. For physicists, so-called shot noise also imposes such a limit. It occurs for example when electric current has to overcome a barrier. At present, all precision measurements work close to this limit. Physicists from Heidelberg University have now demonstrated that this limit can be surpassed by drawing on concepts from quantum mechanics.

Posted: Apr 28th, 2010

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Lollipops and ice fishing: Using molecular rulers to probe nanopores

Using a pair of exotic techniques including a molecular-scale version of ice fishing, a team of researchers working at the National Institute of Standards and Technology have developed methods to measure accurately the length of nanopores, the miniscule channels found in cell membranes.

Posted: Apr 28th, 2010

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Moire patterns in graphene

Researchers at the National Institute of Standards and Technology and the Georgia Institute of Technology have demonstrated that atomic scale moire patterns, an interference pattern that appears when two or more grids are overlaid slightly askew, can be used to measure how sheets of graphene are stacked and reveal areas of strain.

Posted: Apr 28th, 2010

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Bewegung ist Leben - das Antriebssystem der Zellen

Viele Zellen sind zu aktiver Bewegung faehig. Sie benutzen dazu einen inneren Antrieb mit Recycling-Funktion. Forschern gelang es mittels Kryo-Elektronentomographie, den Vorgang buchstaeblich einzufrieren und den molekularen Motor wirklichkeitsgetreu darzustellen.

Posted: Apr 28th, 2010

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Lensless imaging of whole biological cells with soft X-rays

A team of scientists working at beamline 9.0.1 of the Advanced Light Source (ALS) at the Lawrence Berkeley National Laboratory has used x-ray diffraction microscopy to make images of whole yeast cells, achieving the highest resolution - 11 to 13 nanometers - ever obtained with this method for biological specimens.

Posted: Apr 27th, 2010

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New electrolytic cells to play a role in tomorrow's local energy supply

Lower CO2 emissions demand more renewable energy in the energy system. This calls for new solutions that take account of the considerable variations in the amount of wind energy, hydropower, solar energy etc. One of the solutions is a distributed energy system. Here it must be possible to store surplus energy locally using, for example, local SPEC electrolytic cells. The foundation for this technology is being developed by the CASE research project.

Posted: Apr 27th, 2010

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Novel nanoparticles prevent radiation damage

Tiny, melanin-covered nanoparticles may protect bone marrow from the harmful effects of radiation therapy, according to scientists at Albert Einstein College of Medicine of Yeshiva University who successfully tested the strategy in mouse models.

Posted: Apr 26th, 2010

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