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New Technique Studies How Plastic Solar Cells Turn Sunlight into Electricity PDF Print E-mail
Physics and Astronomy
Written by xScience.Info   
Wednesday, 13 December 2006
ImageA new analytical technique that uses infrared spectroscopy to study light-sensitive organic materials could lead to the development of cheaper, more efficient solar cells. Using infrared (IR) spectroscopy to study the vibrations of atoms within the material, the technique provides information about the movement of electrons within a film of carbon-based materials. Obtaining this information is a critical step in the development of a new class of solar cells, which promise significant savings in production costs compared to conventional silicon-based cells. The new analytical technique, published as the cover story in this week's issue of the Journal of Physical Chemistry B, was developed by a team led by Penn State University researcher John B. Asbury, assistant professor of chemistry.
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Regulating the Nuclear Architecture of the Cell PDF Print E-mail
Life Sciences
Written by xScience.Info   
Tuesday, 12 December 2006
The nucleolus (dark blue) resides within the cell nucleus, surrounded by heterochromatinAn organelle called the nucleolus resides deep within the cell nucleus and performs one of the cell's most critical functions: it manufactures ribosomes, the molecular machines that convert the genetic information carried by messenger RNA into proteins that do the work of life.
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Dark Energy at Redshift Z=1 PDF Print E-mail
Physics and Astronomy
Written by xScience.Info   
Tuesday, 05 December 2006
Image Dark energy, the unidentified force that's pushing the universe to expand at ever faster rates, was already at work as early as nine billion years ago, scientists reported last week. New Hubble Space Telescope sightings of distant supernova explosions support the explanation of dark energy as energy of the vacuum whose density has stayed constant throughout the universe's history, the scientists said.
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Photonic Crystal: Optical Beehive PDF Print E-mail
Physics and Astronomy
Written by xScience.Info   
Tuesday, 05 December 2006
Image A team of Italian and German physicists has developed a new, flexible fabrication technique for rewritable photonic crystal devices, which could make it easier to create and modify circuits in which photons process information in the same way that electric currents do in electronics.
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Warm Detectors Look At Brain Magnetism PDF Print E-mail
Experimental Methods and Techiques
Written by xScience.Info   
Tuesday, 05 December 2006
Image The brain and heart both generate weak magnetic fields which, in ways different from electric fields, can reveal subtle clues about such maladies as epilepsy and arrhythmias. Sensitive magnetometers, based on superconducting quantum interference devices (SQUIDs), have been used to prepare detailed magnetoencephalograms (MEGs). Unfortunately, these devices require liquid helium and all its associated cryogenic equipment.
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