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. Scientists have long struggled to understand the body's biological clock. Its tick-tock wakes us up, reminds us to eat and tells us when to go to bed. But what sets that circadian rhythm? http://www.physorg.com/news173975219.html Medicine & Health Mon, 05 Oct 2009 15:38:32 EST news173975219 The annual migration of monarch butterflies from across eastern North America to a specific grove of fir trees in Mexico has long fascinated scientists who have sought to understand just how these delicate creatures can navigate up to 2,000 miles to a single location. Neurobiologists at the University of Massachusetts Medical School (UMMS) have now found that a key mechanism that helps steer the butterflies to their ultimate destination resides not in the insects' brains, as previously thought, but in their antennae, a surprising discovery that provides an entirely new perspective of the antenna's role in migration. http://www.physorg.com/news173021625.html Biology Thu, 24 Sep 2009 15:20:02 EST news173021625 (PhysOrg.com) -- Many of the genes that regulate insulin also alter the timing of the circadian clock, a new study has found. http://www.physorg.com/news172409914.html Biology Thu, 17 Sep 2009 12:38:57 EST news172409914 A University of Utah sleep expert has joined with researchers at the University of California, San Francisco (UCSF), and Stanford University to identify a genetic variation in humans, which the scientists also developed in mouse models, that allows a rare number of people to require less sleep than others. http://www.physorg.com/news172331361.html Medicine & Health Wed, 16 Sep 2009 14:50:19 EST news172331361 IBM today announced the industry's highest performance, highest throughput processor for system-on-chip (SoC) product families in the communication, storage, consumer, and aerospace and defense markets. http://www.physorg.com/news172243811.html Electronics Tue, 15 Sep 2009 14:34:06 EST news172243811 Alexis Webb enters a small room at Washington University in St. Louis with walls, floor and ceiling painted dark green, shuts the door, turns off the lights and bends over a microscope in a black box draped with black cloth. Through the microscope, she can see a single nerve cell on a glass cover slip glowing dimly. http://www.physorg.com/news171728740.html Biology Wed, 09 Sep 2009 15:27:33 EST news171728740 You imagine a clock to be different -- yet the optical table with its many complicated set-ups really is one. Optical clocks like the strontium clock in the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig could be the atomic clocks of the future; some of them though are already ten times more precise and stable than the best primary caesium atomic clocks. http://www.physorg.com/news171195370.html Physics Thu, 03 Sep 2009 11:16:41 EST news171195370 A study in the Sept.1 issue of the journal Sleep shows that the sleep-wake activity rhythms of breast cancer patients are impaired during the administration of chemotherapy. Results indicate that the first cycle of chemotherapy is associated with a temporary disruption of these rhythms, while repeated administration of chemotherapy results in progressively worse and more enduring impairments. http://www.physorg.com/news171007271.html Medicine & Health Tue, 01 Sep 2009 07:30:02 EST news171007271 Chronic alcohol consumption blunts the biological clock's ability to synchronize daily activities to light, disrupts natural activity patterns and continues to affect the body's clock (circadian rhythm), even days after the drinking ends, according to a new study with hamsters. http://www.physorg.com/news171006931.html Medicine & Health Tue, 01 Sep 2009 06:55:57 EST news171006931 (PhysOrg.com) -- Researchers at Columbia and Rockefeller Universities have identified cells in the stomach that regulate the release of a hormone associated with appetite. The group is the first to show that these cells, which release a hormone called ghrelin, are controlled by a circadian clock that is set by mealtime patterns. The finding, published in Proceedings of the National Academy of Sciences, has implications for the treatment of obesity and is a landmark in the decades-long search for the timekeepers of hunger. http://www.physorg.com/news170688849.html Medicine & Health Fri, 28 Aug 2009 15:10:01 EST news170688849 (PhysOrg.com) -- New York collaborators at Columbia and Rockefeller Universities have identified cells in the stomach that time the release of a hormone that makes animals anticipate food and eat even when they are not hungry. The finding, which has implications for the treatment of obesity, marks a landmark in the decades-long search for the timekeepers of hunger. The work reveals what the stomach `tells` the brain. http://www.physorg.com/news169478118.html Medicine & Health Fri, 14 Aug 2009 14:16:11 EST news169478118 An experimental atomic clock based on ytterbium atoms is about four times more accurate than it was several years ago, giving it a precision comparable to that of the NIST-F1 cesium fountain clock, the nation's civilian time standard, scientists at the National Institute of Standards and Technology report in Physical Review Letters. http://www.physorg.com/news169227022.html Physics Tue, 11 Aug 2009 16:31:02 EST news169227022 The Sonoro Elements W Wi-Fi Internet radio ($499.99, sonoro-audio.com) is a smallish, glossy black or white clock radio with some standout features. http://www.physorg.com/news168844971.html Electronics Fri, 07 Aug 2009 06:23:23 EST news168844971 (PhysOrg.com) -- New video showing the atom-by-atom growth of carbon nanotubes reveals they rotate as they grow, much like the halting motion of a mechanical clock's second hand. Published online this month by researchers at France's Université Lyon1/CNRS and Houston's Rice University, the research provides the first experimental evidence of how individual carbon atoms are added to growing nanotubes. http://www.physorg.com/news167918528.html Nanotechnology Mon, 27 Jul 2009 13:03:35 EST news167918528 The ability of plants to tell the time, a mechanism common to all living beings, enables them to survive, grow and reproduce. In a study published in the latest issue of the prestigious journal Ecology Letters, an international team has studied this circadian clock from a molecular viewpoint and has found an ecological implication: it makes climate change scenarios and CO2 level figures more accurate. http://www.physorg.com/news165771470.html Biology Thu, 02 Jul 2009 18:40:02 EST news165771470 New research, conducted by Charles Wingo and his colleagues, at the University of Florida, Gainsville, suggests a link between the circadian rhythm and control of sodium (salt) levels in mice. http://www.physorg.com/news165687966.html Medicine & Health Wed, 01 Jul 2009 20:30:03 EST news165687966 Reducing jet lag is the aim of a new mathematical methodology and software program developed by researchers at Brigham and Women's Hospital and the University of Michigan. http://www.physorg.com/news164554488.html Other Sciences Thu, 18 Jun 2009 15:30:02 EST news164554488 The most accurate atomic clocks in the world are based on the output of cesium atoms. These ultra-precise fountain clocks measure the frequency and time interval of seconds by using a fountain-like movement of cesium atoms. Unfortunately, fountain clocks aren`t easily transportable- they tend to be huge, stationary apparatuses stuck in laboratories. http://www.physorg.com/news163950528.html Nanotechnology Thu, 11 Jun 2009 15:30:01 EST news163950528 Most of our cells possess an internal clock, a group of genes displaying a cyclic expression pattern that reaches a peak once a day. A large number of circadian genes are expressed by organs such as the liver, whose activity needs to be precisely regulated over the course of the day. http://www.physorg.com/news163009136.html Medicine & Health Sun, 31 May 2009 17:19:21 EST news163009136 They are masters at working with light: the scientists at the newly founded QUEST Institute at the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig. And they want to work on some of the most exciting questions relating to physics today: on unimaginably precise methods of measurement for observing the Earth, on the pressing question of the fundamentals of physics, of whether the fundamental constants are really constant, and on the development of the best atomic clock in the world made of a single aluminium atom. http://www.physorg.com/news162813109.html Physics Fri, 29 May 2009 10:54:08 EST news162813109 Dartmouth Medical School geneticists have made new inroads into understanding the regulatory circuitry of the biological clock that synchronizes the ebb and flow of daily activities, according to two studies published May 15. http://www.physorg.com/news161607782.html Biology Fri, 15 May 2009 12:03:37 EST news161607782 Shake things up with MOTO W7 Active Edition, a motion-enabled 3G mobile device announced today by Motorola. Designed for those who want a "moving" phone experience, MOTO W7 is equipped with an accelerometer that senses your body`s motions, orientation and hand gestures to perform tasks. http://www.physorg.com/news161276906.html Electronics Mon, 11 May 2009 16:09:02 EST news161276906 Fluctuations in light intensity allow restoring the regularity of circadian rhythms. This is the main conclusion of the work carried out by Javier Buceta, group leader of The SiMBioSys Group (Theoretical and In Silico Modelling of Biological Systems) and Antoni Da ez-Noguera, dean at the Faculty of Pharmacy of the University of Barcelona. The study is published today in Biophysical Journal. http://www.physorg.com/news160898378.html Biology Thu, 07 May 2009 07:00:19 EST news160898378 (AP) -- People with Type 2 diabetes may soon get a very different treatment approach: A drug that helps control blood sugar via the brain - an idea sparked, surprisingly, by the metabolism of migrating birds. http://www.physorg.com/news160843146.html Medicine & Health Wed, 06 May 2009 15:39:44 EST news160843146 (PhysOrg.com) -- Scientists from Queen Mary, University of London have discovered a new protein complex operating in fruit fly circadian clocks, which may also help to regulate our own biological clocks. http://www.physorg.com/news160215248.html Biology Wed, 29 Apr 2009 09:14:51 EST news160215248 (PhysOrg.com) -- The circadian clock coordinates physiological and behavioral processes on a 24-hour rhythm, allowing animals to anticipate changes in their environment and prepare accordingly. Scientists already know that some genes are controlled by the clock and are turned on only one time during each 24-hour cycle. http://www.physorg.com/news159642057.html Medicine & Health Wed, 22 Apr 2009 18:01:27 EST news159642057 A new, extremely energy-efficient processor chip that provides breakthrough speeds for a variety of computing tasks has been designed by a group at the University of California, Davis. The chip, dubbed AsAP, is ultra-small, fully reprogrammable and highly configurable, so it can be widely adapted to a number of applications. http://www.physorg.com/news159623453.html Technology Wed, 22 Apr 2009 12:51:14 EST news159623453 A clock that is so precise that it loses only a second every 300 million years - this is the result of new research in ultra cold atoms. The international collaboration is comprised of researchers from the University of Colorado, USA and the Niels Bohr Institute at the University of Copenhagen and the results have just been published in the prestigious scientific journal, Science. http://www.physorg.com/news159111429.html Physics Thu, 16 Apr 2009 14:37:36 EST news159111429 Jet lag is the bane of many travelers, and similar fatigue can plague people who work in rotating shifts. Scientists know the problem results from disruption to the body's normal rhythms and are getting closer to a better understanding that might lead to more effective treatment. http://www.physorg.com/news159106695.html Medicine & Health Thu, 16 Apr 2009 13:18:41 EST news159106695 In an Early Edition issue of The Proceedings of the National Academy of Sciences (PNAS) on April 9, 2009, the researchers report that they have been able to determine the molecular structure of a plant photolyase protein that is surprisingly similar to two cryptochrome proteins that control the "master clock" in humans and other mammals. They have also been able to test how structural changes affect the function of these proteins. http://www.physorg.com/news158649419.html Biology Sat, 11 Apr 2009 06:17:48 EST news158649419