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. Sleep disturbances increase as we age. Some studies report more than half of seniors 65 years of age or older suffer from chronic sleep disturbances. Researchers have long believed that the sleep disturbances common among the elderly often result from a disruption of the body's circadian rhythms -- biological cycles that repeat approximately every 24 hours. http://www.physorg.com/news162813350.html Medicine & Health Fri, 29 May 2009 10:56:21 EST news162813350 (PhysOrg.com) -- A University of Colorado at Boulder team has developed a new method of shrinking the size of circuitry used in nanotechnology devices like computer chips and solar cells by using two separate colors of light. http://www.physorg.com/news159100452.html Nanotechnology Thu, 16 Apr 2009 11:34:39 EST news159100452 Lighting consumes one-fifth of the electricity generated in the United States. Solid-state lighting offers tremendous potential to improve the situation - once major research challenges are overcome. http://www.physorg.com/news156953162.html Chemistry Sun, 22 Mar 2009 15:11:05 EST news156953162 Two common strains of methicillin-resistant Staphylococcus aureus, commonly known as MRSA, were virtually eradicated in the laboratory by exposing them to a wavelength of blue light, in a process called photo-irradiation that is described in a paper published online ahead of print in Photomedicine and Laser Surgery. The article will appear in the April 2009 issue (Volume 27, Number 2) of the peer-reviewed journal published by Mary Ann Liebert, Inc. http://www.physorg.com/news152469812.html Medicine & Health Thu, 29 Jan 2009 16:44:01 EST news152469812 People who lack essential antioxidants, and who have high levels of sunlight exposure, have a higher risk of developing advanced macular degeneration (AMD), according to a study published today in the journal Archives of Ophthalmology. AMD is the leading cause of poor vision in the UK. http://www.physorg.com/news143207769.html Medicine & Health Tue, 14 Oct 2008 12:56:09 EST news143207769 We all know that light effects the growth and development of plants, but what effect does light have on humans and animals? A new paper by Nathalie Hoang et al., published in PLoS Biology this week, explores this question by examining cryptochromes in flies, mice, and humans. In plants, cryptochromes are photoreceptor proteins which absorb and process blue light for functions such as growth, seedling development, and leaf and stem expansion. http://www.physorg.com/news134110624.html Biology Tue, 01 Jul 2008 05:57:04 EST news134110624