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. Vitamin D is essential to good health but needs to be activated to function properly in the human body. Until recently, this activation was thought to happen primarily in the kidneys, but a new University of Iowa study finds that the activation step can also occur in lung airway cells. http://www.physorg.com/news145006572.html Medicine & Health Tue, 04 Nov 2008 07:36:12 EST news145006572 (PhysOrg.com) -- Scientists have detailed the active form of a protein which they hope will enhance our understanding of the molecular mechanisms of vision, and advance drug design. http://www.physorg.com/news141923083.html Medicine & Health Mon, 29 Sep 2008 16:04:43 EST news141923083