http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. The immune system's T cells have the unique responsibilities of being both jury and executioner. They examine other cells for signs of disease, including cancers or infections, and, if such evidence is found, rid them from the body. Precisely how T cells shift so swiftly from one role to another, however, has been a mystery. http://www.physorg.com/news176390808.html Chemistry Mon, 02 Nov 2009 14:20:02 EST news176390808 An international team of physicists at Los Alamos National Laboratory has succeeded in using intense laser light to accelerate protons to energies never before achieved. Using this technique, scientists can now accelerate particles to extremely high velocities that would otherwise only be possible using large accelerator facilities. Physicists around the world are examining laser particle acceleration and laser produced radiation for potential future uses in cancer treatment. http://www.physorg.com/news176375335.html Physics Mon, 02 Nov 2009 09:09:30 EST news176375335 An abundant greenhouse gas could someday help clean up the earth. Converting methane to liquid methanol could produce clean, low-cost fuel and prevent the potent greenhouse gas from entering the atmosphere. Exploiting methane in this way could also produce a hydrogen source for fuel cells and yield other industrial applications. http://www.physorg.com/news175434422.html Chemistry Thu, 22 Oct 2009 13:10:01 EST news175434422 (PhysOrg.com) -- Tomorrow's lasers may come with a bit of bling, thanks to a new technology that uses man-made diamonds to enhance the power and capabilities of lasers. Researchers in Australia have now demonstrated the first laser built with diamonds that has comparable efficiency to lasers built with other materials. http://www.physorg.com/news172497349.html Physics Fri, 18 Sep 2009 12:56:20 EST news172497349 Scientists at the Naval Research Laboratory (NRL) are developing a new technology for use in underwater acoustics. The new technology uses flashes of laser light to remotely create underwater sound. The new acoustic source has the potential to expand and improve both Naval and commercial underwater acoustic applications, including undersea communications, navigation, and acoustic imaging. http://www.physorg.com/news171284762.html Physics Fri, 04 Sep 2009 12:08:41 EST news171284762 (PhysOrg.com) -- Because the new device, called a "spaser," is the first of its kind to emit visible light, it represents a critical component for possible future technologies based on "nanophotonic" circuitry, said Vladimir Shalaev, the Robert and Anne Burnett Professor of Electrical and Computer Engineering at Purdue University. http://www.physorg.com/news169649724.html Physics Sun, 16 Aug 2009 13:56:15 EST news169649724 An experimental atomic clock based on ytterbium atoms is about four times more accurate than it was several years ago, giving it a precision comparable to that of the NIST-F1 cesium fountain clock, the nation's civilian time standard, scientists at the National Institute of Standards and Technology report in Physical Review Letters. http://www.physorg.com/news169227022.html Physics Tue, 11 Aug 2009 16:31:02 EST news169227022 (PhysOrg.com) -- Looking almost 11 billion years into the past, astronomers have measured the motions of stars for the first time in a very distant galaxy and clocked speeds upwards of one million miles per hour, about twice the speed of our Sun through the Milky Way. http://www.physorg.com/news168698290.html Space & Earth Wed, 05 Aug 2009 13:38:47 EST news168698290 (PhysOrg.com) -- Although the speed of light is constant in a vacuum, light slows down a small amount when traveling through other materials. While it's relatively easy to measure the speed of light in mediums made of one material, it's much more difficult to track light's speed through composite materials. Now, a new technique can determine the speed of light in composite materials by varying the pressure of light. http://www.physorg.com/news168281326.html Physics Sun, 02 Aug 2009 13:49:24 EST news168281326 Most scientists who create models trying to understand the mechanics and aerodynamics of insect flight have assumed that insect wings are relatively rigid as they flap. http://www.physorg.com/news165514741.html Physics Mon, 29 Jun 2009 17:19:32 EST news165514741 (PhysOrg.com) -- In nature, trees pull vast amounts of water from their roots up to their leaves hundreds of feet above the ground through capillary action, but now scientists at the University of Rochester have created a simple slab of metal that lifts liquid using the same principle -but does so at a speed that would make nature envious. http://www.physorg.com/news163160428.html Physics Tue, 02 Jun 2009 11:20:53 EST news163160428 (PhysOrg.com) -- The idea of the space elevator just got a little crazier. While the `traditional` concept involved using rocket propulsion or laser light pressure to propel loads up a cable anchored to Earth, a new study shows that a rotating space elevator could do away with engines or laser light pressure application completely. Instead, the unique double rotating motion of looped strings could provide a mechanism for objects to slide up the elevator cable into outer space. The space elevator could launch satellites and spacecraft with humans, and even be used to host space stations and research posts. http://www.physorg.com/news162112945.html Physics Thu, 21 May 2009 08:23:09 EST news162112945 Scientists have devised a new technique for real-time detection of freely moving individual neutral atoms that is more than 99.7% accurate and sensitive enough to discern the arrival of a single atom in less than one-millionth of a second, about 20 times faster than the best previous methods. http://www.physorg.com/news161787101.html Physics Sun, 17 May 2009 13:52:16 EST news161787101 For more than a decade, scientists have been frustrated in their attempts to create continuously emitting light sources from individual molecules because of an optical quirk called "blinking," but now scientists at the University of Rochester have uncovered the basic physics behind the phenomenon, and along with researchers at the Eastman Kodak Company, created a nanocrystal that constantly emits light. http://www.physorg.com/news161190228.html Nanotechnology Sun, 10 May 2009 16:05:04 EST news161190228 (PhysOrg.com) -- The U.S. military can now calibrate high-power laser systems, such as those intended to defuse unexploded mines, more quickly and easily thanks to a novel nanotube-coated power measurement device developed at the National Institute of Standards and Technology. http://www.physorg.com/news160839024.html Nanotechnology Wed, 06 May 2009 14:31:41 EST news160839024 Scientists have studied high-frequency brain waves, known as gamma oscillations, for more than 50 years, believing them crucial to consciousness, attention, learning and memory. Now, for the first time, MIT researchers and colleagues have found a way to induce these waves by shining laser light directly onto the brains of mice. http://www.physorg.com/news159973187.html Medicine & Health Sun, 26 Apr 2009 14:00:19 EST news159973187 (PhysOrg.com) -- The world's brightest X-ray source sprang to life last week at the U.S. Department of Energy's SLAC National Accelerator Laboratory. The Linac Coherent Light Source (LCLS) offers researchers the first-ever glimpse of high-energy or "hard" X-ray laser light produced in a laboratory. http://www.physorg.com/news159556347.html Physics Tue, 21 Apr 2009 18:12:48 EST news159556347 (PhysOrg.com) -- Researchers at the Centre of Molecular Materials for Photonics and Electronics (CMMPE) (part of the Department's Photonics Research Group at the University of Cambridge) are leading the way towards the development of extremely high colour resolution laser displays using liquid crystal laser technology. http://www.physorg.com/news159458998.html Physics Mon, 20 Apr 2009 15:11:08 EST news159458998 (PhysOrg.com) -- A recent Montana State University master's graduate is working with doctors at Vanderbilt Medical Center in Tennessee to build a handheld laser microscope that could someday reduce the number of biopsies needed to diagnose skin cancer. http://www.physorg.com/news159200399.html Medicine & Health Fri, 17 Apr 2009 15:20:46 EST news159200399 A clock that is so precise that it loses only a second every 300 million years - this is the result of new research in ultra cold atoms. The international collaboration is comprised of researchers from the University of Colorado, USA and the Niels Bohr Institute at the University of Copenhagen and the results have just been published in the prestigious scientific journal, Science. http://www.physorg.com/news159111429.html Physics Thu, 16 Apr 2009 14:37:36 EST news159111429 Ohio State University researchers have developed a new strategy to overcome one of the major obstacles to a grand challenge in physics. http://www.physorg.com/news158516549.html Physics Thu, 09 Apr 2009 17:23:07 EST news158516549 (PhysOrg.com) -- `Quantum wells have been instrumental in telecommunications, enabling light amplification,` Patanjali Kambhampati tells PhysOrg.com, `but theory has suggested that a very small - colloidal - quantum dot could amplify light even better than a quantum well. There have been problems, however, in getting lasers to work properly with colloidal quantum dots, so focus has shifted to other types of structures.` http://www.physorg.com/news157805833.html Physics Wed, 01 Apr 2009 11:57:37 EST news157805833 A recent Montana State University master's graduate is working with doctors at Vanderbilt Medical Center in Tennessee to build a handheld laser microscope that could someday reduce the number of biopsies needed to diagnose skin cancer. http://www.physorg.com/news157654684.html Medicine & Health Mon, 30 Mar 2009 17:58:32 EST news157654684 Hollow gold nanospheres equipped with a targeting peptide find melanoma cells, penetrate them deeply, and then cook the tumor when bathed with near-infrared light, a research team led by scientists at The University of Texas M. D. Anderson Cancer Center reported in the Feb. 1 issue of Clinical Cancer Research. http://www.physorg.com/news152772851.html Nanotechnology Mon, 02 Feb 2009 04:55:02 EST news152772851 (PhysOrg.com) -- Since 1970, scientists have been working with `optical tweezers` - lasers that move microscopic amounts of matter using forces originating from the light matter interaction. Now, for the first time, researchers have demonstrated that light-induced forces can move macroscopic amounts of matter, as well. http://www.physorg.com/news152456596.html Physics Thu, 29 Jan 2009 13:04:04 EST news152456596 Singled-walled carbon nanotubes are graphene sheets wrapped into tubes, and are typically made up of various sizes and with different amounts of twist (also known as chiralities). Each type of nanotube has its own electronic and optical properties. Physicists at Osaka University in Japan used colored light to selectively manipulate different types of carbon nanotubes. They found that some of nanotubes displayed a tendency to cluster at the focal area of a focused laser beam. http://www.physorg.com/news141658386.html Nanotechnology Fri, 26 Sep 2008 14:33:06 EST news141658386