http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (Phys.org) -- Salmonella becomes dangerously virulent only when molecular sensors within the organism sense changes in the environment, a team of researchers from the Yale School of Medicine and the Yale Microbial Diversity Institute report in the June 14 issue of the journal Nature. http://phys.org/news258956439.html Biology Fri, 15 Jun 2012 05:20:49 EST news258956439 Researchers from the NIST Center for Nanoscale Science and Technology have made a grating coupler that transmits over 45 % of the incident optical energy from a plane wave into a single surface plasmon polariton (SPP) mode propagating on a flat gold surface, an order-of-magnitude increase over any SPP grating coupler reported to date. http://phys.org/news247391229.html Physics Thu, 02 Feb 2012 08:10:01 EST news247391229 Glucose meters aren't just for diabetics anymore. Thanks to University of Illinois chemists, they can be used as simple, portable, inexpensive meters for a number of target molecules in blood, serum, water or food. http://phys.org/news230732673.html Chemistry Sun, 24 Jul 2011 13:25:09 EST news230732673 (PhysOrg.com) -- Researchers from North Carolina State University have found a way to optimize the development of DNA self-assembling materials, which hold promise for technologies ranging from drug delivery to molecular sensors. The key to the advance is the discovery of the “Goldilocks” length for DNA strands used in self-assembly – not too long, not too short, but just right. http://phys.org/news207479045.html Chemistry Thu, 28 Oct 2010 10:04:12 EST news207479045