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. (PhysOrg.com) -- Biologist Magdalena Bezanilla and colleagues at the University of Massachusetts Amherst have used a technique they call multi-gene silencing to, for the first time, simultaneously silence nine genes in a multicellular organism. It allowed them to discover molecular secrets of how certain plant tissues know which end is their growing tip, also referred to as polarized growth. http://www.physorg.com/news170439907.html Biology Tue, 25 Aug 2009 17:25:48 EST news170439907 Human tissues normally discarded after surgical procedures could be a rich additional source of stem cells for regenerative medicine. New research from BioMed Central's open access Journal of Translational Medicine shows for the first time that human fallopian tubes are abundant in mesenchymal stem cells which have the potential of becoming a variety of cell types. http://www.physorg.com/news164509174.html Medicine & Health Thu, 18 Jun 2009 02:30:01 EST news164509174 (PhysOrg.com) -- In a world-first, scientists at the University of Glasgow have grown micro-tube structures from crystals of inorganic compounds. http://www.physorg.com/news155236276.html Chemistry Mon, 02 Mar 2009 17:11:49 EST news155236276 Researchers at Purdue University have developed a technique using spun-sugar filaments to create a scaffold of tiny synthetic tubes that might serve as conduits to regenerate nerves severed in accidents or blood vessels damaged by disease. http://www.physorg.com/news154881405.html Medicine & Health Thu, 26 Feb 2009 14:37:19 EST news154881405 HOUSTON -- (Feb. 5, 2009) -- Rice University materials scientists have put a new "twist" on carbon nanotube growth. The researchers found the highly touted nanomaterials grow like tiny molecular tapestries, woven from twisting, single-atom threads. http://www.physorg.com/news153060785.html Nanotechnology Thu, 05 Feb 2009 12:56:27 EST news153060785 Scientists at the California Institute of Technology (Caltech) have developed a simple process for mass producing molecular tubes of identical--and precisely programmable--circumferences. The technological feat may allow the use of the molecular tubes in a number of nanotechnology applications. http://www.physorg.com/news139233520.html Nanotechnology Fri, 29 Aug 2008 12:58:40 EST news139233520 People have long prized silver as a precious metal. Now, silver-coated endotracheal tubes are giving critically ill patients another reason to value the lustrous metal. In a study published in the Aug. 20, 2008 issue of the Journal of the American Medical Association, researchers at Washington University School of Medicine in St. Louis and the NASCENT Investigation Group, report that the silver-coated tubes led to a 36 percent reduction of ventilator-associated pneumonia (VAP). http://www.physorg.com/news138381674.html Medicine & Health Tue, 19 Aug 2008 16:21:14 EST news138381674 Scientists have studied superconductors and superfluids for decades. Now, researchers at Washington University in St. Louis have drawn the first detailed picture of the way a superfluid influences the behavior of a superconductor. In addition to describing previously unknown superconductor behavior, these calculations could change scientists' understanding of the motion of neutron stars. http://www.physorg.com/news136863422.html Physics Sat, 02 Aug 2008 02:37:02 EST news136863422 What began with an off-the-cuff curiosity eventually led Joe Williams to hang from the limbs of a tree 80 feet above the soil of northeastern Australia. http://www.physorg.com/news136483600.html Biology Mon, 28 Jul 2008 17:06:40 EST news136483600 In flowering plants, the female reproductive organ, the pistil, comprises the stigma, style, and ovary. The stigma catches pollen shed by the male anthers. If the pollen is compatible, it will germinate and send tubes through the extracellular matrix (ECM) of the style toward the ovary. It is in the style ECM where recognition and acceptance or rejection of the pollen takes place. Compatible pollen tubes grow unhindered toward the ovary. Incompatible pollen tubes become distorted and stop growing. The recognition mechanism is analogous to the immune systems in animals. Factors present in both the ECM and the pollen are needed for recognition and rejection or acceptance. http://www.physorg.com/news133845527.html Biology Sat, 28 Jun 2008 04:18:47 EST news133845527