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Delayed time zero in photoemission

Until now, it has been assumed that during photoemission the electron start moving out of the atom immediately after the impact of the photon. This point in time can be detected and has so far been considered as coincident with the arrival time of the light pulse, i.e. with 'time zero' in the interaction of light with matter. Using their ultra-short time measurement technology, physicists have now tested this assumption.

Posted: Jun 24th, 2010

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Researchers develop living, breathing human lung-on-a-chip

Researchers from the Wyss Institute for Biologically Inspired Engineering at Harvard University, Harvard Medical School and Children's Hospital Boston have created a device that mimics a living, breathing human lung on a microchip. The device, about the size of a rubber eraser, acts much like a lung in a human body and is made using human lung and blood vessel cells.

Posted: Jun 24th, 2010

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Gene therapy a step closer to mass production

EUREKA project E! 3371 Gene Transfer Agents has made great advances in the development of novel non-viral carriers able to introduce genetic material into the target cells. These new agents, derivatives of cationic amphiphilic 1,4-dihydropyridine (1,4-DHP), avoid the problems of the recipient's immune system reacting against a viral carrier.

Posted: Jun 24th, 2010

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World first for quantum memory storage

An Australian National University-led team has developed the most efficient quantum memory for light in the world, taking us closer to a future of super-fast computers and communication secured by the laws of physics.

Posted: Jun 24th, 2010

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Depth charge: Using atomic force microscopy to study subsurface structures

Over the past couple of decades, atomic force microscopy (AFM) has emerged as a powerful tool for imaging surfaces at astonishing resolutions - fractions of a nanometer in some cases. But suppose you're more concerned with what lies below the surface? Researchers have shown that under the right circumstances, surface science instruments such as the AFM can deliver valuable data about sub-surface conditions.

Posted: Jun 24th, 2010

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Advances in analysis using nanopore-based single-molecule mass spectrometry

National Institute of Standards and Technology (NIST) scientists have moved a step closer to developing the means for a rapid diagnostic blood test that can scan for thousands of disease markers and other chemical indicators of health. The team reports it has learned how to decode the electrical signals generated by a nanopore - a 'gate' less than 2 nanometers wide in an artificial cell membrane.

Posted: Jun 24th, 2010

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New technique can sense movement of single molecules over hours

Scientists can detect the movements of single molecules by using fluorescent tags or by pulling them in delicate force measurements, but only for a few minutes. A new technique by Rice University researchers will allow them to track single molecules without modifying them - and it works over longer timescales.

Posted: Jun 23rd, 2010

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Quantum simulations uncover hydrogen's phase transitions

Not much is known about what happens to this abundant element under high-pressure conditions when it transforms from one state to another. Using quantum simulations, scientists were able to uncover these phase transitions in the laboratory.

Posted: Jun 23rd, 2010

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Nanomaterials researchers' guide for solving optimization problems now available from NAG

Worldwide nanomaterials researchers seeking the most appropriate way to solve difficult optimization problems typical of nanomaterials research can get easy to follow step-by-step instructions on how to select the best-suited local or global optimization routines, from the Numerical Algorithms Group (NAG) Library, by making use of the Decision Trees for optimization.

Posted: Jun 23rd, 2010

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