16-01-2008   -   Medicine

Wed, 16 Jan 2008 NIST researchers have calibrated solutions of germanium-68 that could become the basis of a new standard reference material for this isotope. The next phase of this project involves working with RadQual to calibrate a new "mock" syringe standard that would use germanium-68 embedded in an epoxy to simulate fluorine-18 in a syringe. This would help researchers more accurately determine the amount of fluorine-18 to be injected into patients during the PET procedure so as to minimize radiation dose while still producing the best image. more

  13-01-2008   -   Physics

Sat, 12 Jan 2008 Scientists have discovered that a magnetic field can interact with the electrons in a superconductor in ways never before observed. An exceptional compound of metals -- a combination of cobalt, indium and a rare earth -- loses its resistance when cooled to just a couple of degrees above absolute zero. more

  09-01-2008   -   Biology

Wed, 09 Jan 2008 For the first time, magnetism has been used to trigger cellular reactions normally induced by drugs or hormones. The discovery was made possible by getting tiny beads -- 30 nanometers in diameter -- to bind to receptor molecules on the cell surface. When exposed to a magnetic field, the beads become magnets and cluster together through magnetic attraction, pulling receptors along with them mimicking what happens when drugs or other molecules bind to cell receptors.more

  09-01-2008   -   Physics

Wed, 09 Jan 2008 Researchers have achieved optical waveguiding of near-infrared light through features embedded in self-assembled, three-dimensional photonic crystals. Applications for the optically active crystals include low-loss waveguides, low-threshold lasers and on-chip optical circuitry.more

  06-01-2008   -   Physics

Sun, 06 Jan 2008 Newly developed high-output LED modules are based on perfect synergy between solid-state physics and optics. To use the light emitted by the LED chip as fully as possible, a special optic for the respective application was fabricated. It consists of two parts: a primary and a secondary lens. The primary lens collects the light emitted by the LED close to the chip and combines it to form a beam. The secondary lens homogenizes the light beam. more

  03-01-2008   -   Energy

Thu, 03 Jan 2008 Hydrogen is the fuel of the future. Unfortunately, one problem remains: Hydrogen is a gas and cannot easily be pumped into a tank like gasoline. Storage in the form of solid hydrides, chemical compounds of hydrogen and a metal or semi-metal, are good storage materials in principle, but have not been well suited to automotive applications. Researches have now developed a hydride that could be a useful starting point for the development of future automotive hydrogen-storage materials. more

  02-01-2008   -   Medicine

Wed, 02 Jan 2008 The world's most powerful medical magnetic resonance imaging machine, the 9.4 Tesla at the University of Illinois at Chicago, has successfully completed safety trials and may soon offer physicians a real-time view of biological processes in the human brain.more

  30-12-2007   -   Chemistry

Sat, 29 Dec 2007 A unique electron microscope that can help create four-dimensional "movies" of molecules may hold the answers to research questions in a number of fields including chemistry, biology, and physics. more

  30-12-2007   -   Biology

Sat, 29 Dec 2007 Animals and insects communicate through an invisible world of scents. By exploiting infrared technology, researchers at Rockefeller University just made that world visible. With the ability to see smells, these scientists now show that when fly larvae detect smells with both olfactory organs they find their way toward a scented target more accurately than when they detect them with one. more

  27-12-2007   -   Physics

Wed, 26 Dec 2007 The dashing start of electrons in a crystal does not remain without consequences for their further fate. Researchers examined the ultrafast movement of electrons in a gallium arsenide crystal exposed for a short time to a very high electrical field. This conceptually new experiment shows for the first time a collective, oscillatory motion of the electrons with ultrahigh frequency, which arises additionally to the well-known drift motion of these particles. This newly discovered effect could play an important role in connection with the miniaturization of electronic devices. more

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