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) -- The smallest nano-sized silica particles used in biomedicine and engineering likely won't cause unexpected biological responses due to their size, according to work presented today. The result should allay fears that cells and tissues will react unpredictably when exposed to the finest silica nanomaterials in industrial or commercial applications. http://www.physorg.com/news154021822.html Nanotechnology Mon, 16 Feb 2009 15:51:37 EST news154021822 An international collaboration of researchers has discovered a new enzyme in a species of bacteria with potential environmental cleanup and energy roles. This is the first multi-protein enzyme of its kind. Although many microbes use a single-protein version to consume certain food, the new study suggests that dozens of bacteria use only the multi-protein one instead. This advance in understanding of the microbe's metabolism will help researchers use the bugs to clean up toxic or radioactive pollutants. http://www.physorg.com/news152817968.html Chemistry Mon, 02 Feb 2009 17:26:42 EST news152817968 Soot from pollution causes winter snowpacks to warm, shrink and warm some more. This continuous cycle sends snowmelt streaming down mountains as much as a month early, a new study finds. How pollution affects a mountain range's natural water reservoirs is important for water resource managers in the western United States and Canada who plan for hydroelectricity generation, fisheries and farming. http://www.physorg.com/news150983710.html Space & Earth Mon, 12 Jan 2009 11:55:10 EST news150983710