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. Scientists at the University of Liverpool have found that male fruitflies experience a type of 'paranoia' in the presence of another male, which doubles the length of time they mate with a female, despite the female of the species only ever mating with one male. http://phys.org/news232020183.html Biology Mon, 08 Aug 2011 11:10:01 EST news232020183 Mitochondria are the body's energy producers, the power stations inside our cells. Researchers at the University of Gothenburg, Sweden, have now identified a group of mitochondrial proteins, the absence of which allows other protein groups to stabilise the genome. This could delay the onset of age-related diseases and increase lifespan. http://phys.org/news224237279.html Biology Tue, 10 May 2011 09:08:28 EST news224237279 (PhysOrg.com) -- Small animals generally live shorter lives than larger animals, but those that hibernate are an exception, primarily because they escape predation during the winter, according to a new study by scientists from Austria. Hibernating animals also reproduce more slowly than non-hibernating animals. http://phys.org/news220851938.html Biology Fri, 01 Apr 2011 06:20:01 EST news220851938 Manipulation of cells by a new microfluidic device may help clinicians improve a promising cancer therapy that harnesses the body's own immune cells to fight such diseases as metastatic melanoma, non-Hodgkin's lymphoma, chronic lymphocytic leukemia and neuroblastoma. http://phys.org/news218282045.html Biology Wed, 02 Mar 2011 09:54:29 EST news218282045 Ornithologist Ian Nisbet loves to share two photos of himself with his beloved terns. http://phys.org/news218226530.html Medicine & Health Tue, 01 Mar 2011 18:29:52 EST news218226530 (PhysOrg.com) -- Reducing the amount of feed given to young female cows called heifers can result in more efficient use of nutrients for growth and reproduction, according to studies conducted by U.S. Department of Agriculture (USDA) scientists. http://phys.org/news214734052.html Biology Thu, 20 Jan 2011 08:22:44 EST news214734052 Every hour, an enormous quantity and variety of manmade chemicals, having reached the end of their useful lifespan, flood into wastewater treatment plants. These large-scale processing facilities, however, are designed only to remove nutrients, turbidity and oxygen-depleting human waste, and not the multitude of chemicals put to residential, institutional, commercial and industrial use. So what happens to these chemicals, some of which may be toxic to humans and the environment? Do they get destroyed during wastewater treatment or do they wind up in the environment with unknown consequences? http://phys.org/news212161020.html Space & Earth Tue, 21 Dec 2010 13:37:43 EST news212161020 Increased life expectancy in the United States has not been accompanied by more years of perfect health, reveals new research published in the December issue of the Journal of Gerontology. http://phys.org/news211468495.html Medicine & Health Mon, 13 Dec 2010 13:15:10 EST news211468495 For decades, scientists have been searching for the fundamental biological secrets of how eating less extends lifespan. http://phys.org/news209307748.html Medicine & Health Thu, 18 Nov 2010 13:03:20 EST news209307748 Mahtab Jafari's research shows curry's main ingredient has more to offer than good flavor. It extended the lifespan of fruit flies by up to 20 percent, while improving locomotion and having tumor-prevention properties. http://phys.org/news206020290.html Medicine & Health Mon, 11 Oct 2010 13:30:07 EST news206020290 The human quest for longer life may be one step closer, thanks to research from Concordia University. Published in the journal Aging, a new study is the first to identify the role of a bile acid, called lithocholic acid (LCA), in extending the lifespan of normally aging yeast. The findings may have significant implications for human longevity and health, as yeast share some common elements with people. http://phys.org/news203763929.html Medicine & Health Wed, 15 Sep 2010 10:06:03 EST news203763929 New research being presented this week is giving scientists new insight into why a restricted diet can lead to a longer lifespan and reduced incidence of age-related diseases for a wide variety of animals. Scientists have known for some time that a restricted diet can extend the lifespan of certain animals but this work shows how it affects ageing mechanisms - and significantly has also shown that the effects occur even if the restricted diet is adopted later in life. http://phys.org/news198475804.html Medicine & Health Fri, 16 Jul 2010 05:20:01 EST news198475804 Don't put down the red wine and vitamins just yet, but if you're taking antioxidants because you hope to live longer, consider this: a new study published in the June 2010 issue of the journal Genetics casts doubt on the theory that oxidative stress to our tissues shortens lifespan. That's because researchers from McGill University in Canada have identified mutations in 10 different genes of worms (genes believed to have counterparts in humans) that extend their lifespan without reducing the level of oxidative stress the worms suffer. The results contradict the popular theory that production of toxic reactive oxygen species in tissues is responsible for aging. http://phys.org/news197642893.html Medicine & Health Tue, 06 Jul 2010 13:48:56 EST news197642893 Scientists have discovered that when they transplant ovaries from young mice into aging female mice, not only does the procedure make the mice fertile again, but also it rejuvenates their behaviour and increases their lifespan. The question now is: could ovarian transplants in women have the same effect? http://phys.org/news197018540.html Medicine & Health Tue, 29 Jun 2010 08:22:43 EST news197018540 Samsung Electronics today announced the launch and availability of the world’s first RGB LED data projector with 1,000 ANSI lumens. With no lamp to replace, the SP-F10M has an LED light source that promises a lifespan of 50,000 hours using Eco-mode, and significantly reduces the hassle, environmental impact, and total cost of ownership. The LED light source also maintains its brightness over the most of life of the projector, with greater color intensity and range than any LED projector currently available. http://phys.org/news196693820.html Electronics Fri, 25 Jun 2010 14:30:01 EST news196693820 (PhysOrg.com) -- Men die at higher rates than women across the lifespan. A new study suggests that this excess mortality is the price of reproductive competition. http://phys.org/news193943814.html Biology Mon, 24 May 2010 18:17:57 EST news193943814 Organisms from yeast to rodents to humans all benefit from cutting calories. In less complex organisms, restricting calories can double or even triple lifespan. It's not yet clear just how much longer calorie restriction might help humans live, but those who practice the strict diet hope to survive past 100 years old. http://phys.org/news190557752.html Medicine & Health Thu, 15 Apr 2010 14:00:06 EST news190557752 The older we get, the more different we become. This is the conclusion of a study that followed people from their 70th to their 90th year of life. http://phys.org/news189689257.html Medicine & Health Mon, 05 Apr 2010 12:50:01 EST news189689257 (PhysOrg.com) -- Scientists funded by the Biotechnology and Biological Sciences Research Council (BBSRC) at the University of Birmingham have discovered that a gene called DAF-16 is strongly involved in determining the rate of ageing and average lifespan of the laboratory worm Caenorhabditis elegans (C. elegans) and its close evolutionary cousins. DAF-16 is found in many other animals, including humans. It is possible that this knowledge could open up new avenues for altering ageing, immunity and resistance to stresses in humans. The research is published today (01 April) in PLoS ONE. http://phys.org/news189349093.html Biology Thu, 01 Apr 2010 17:00:01 EST news189349093 (PhysOrg.com) -- Professor Stafford Lightman and his team in the Laboratories for Integrative Neuroscience and Endocrinology are interested in how stress impacts upon human health throughout the lifespan - just how does it affect your body and the way it responds to disease? http://phys.org/news189178707.html Medicine & Health Tue, 30 Mar 2010 14:39:36 EST news189178707 The broader your smile and the deeper the creases around your eyes when you grin, the longer you are likely to live, according to a study published in Psychological Science this week. http://phys.org/news188677879.html Medicine & Health Wed, 24 Mar 2010 19:38:11 EST news188677879 (PhysOrg.com) -- If children feel threatened by even very low levels of violence between their parents, they may be at increased risk for developing trauma symptoms, new research suggests. http://phys.org/news188670834.html Medicine & Health Wed, 24 Mar 2010 17:38:42 EST news188670834 Scientists from the Ottawa Hospital Research Institute (OHRI) and the University of Ottawa have identified a promising new approach for developing drugs to treat Spinal muscular atrophy (SMA), the leading inherited cause of death in infants and toddlers. Dr. Rashmi Kothary and his doctoral student Melissa Bowerman have found that an enzyme called RhoA is overly active in a mouse model of the disease and blocking this enzyme can greatly increase survival. The study is published in Human Molecular Genetics. http://phys.org/news187868935.html Medicine & Health Mon, 15 Mar 2010 10:49:24 EST news187868935 A 10-year effort by a University of Rhode Island scientist to develop transgenic rainbow trout with enhanced muscle growth has yielded fish with what have been described as six-pack abs and muscular shoulders that could provide a boost to the commercial aquaculture industry. http://phys.org/news187442194.html Biology Wed, 10 Mar 2010 11:19:46 EST news187442194 Elliot Jacques coined the term "mid-life crisis" 40 years ago, when the average lifespan was 70 and "mid-life" came at age 35. Individuals could expect their quality of life to decline from that point forward, Jacques argued, so some extreme reactions to encroaching mortality were to be expected, such as having extra-marital affairs and buying a Corvette. http://phys.org/news183306394.html Medicine & Health Thu, 21 Jan 2010 14:40:02 EST news183306394 Going back for a second dessert after your holiday meal might not be the best strategy for living a long, cancer-free life say researchers from the University of Alabama at Birmingham. That's because they've shown exactly how restricted calorie diets -- specifically in the form of restricted glucose -- help human cells live longer. This discovery, published online in The FASEB Journal could help lead to drugs and treatments that slow human aging and prevent cancer. http://phys.org/news180711805.html Medicine & Health Tue, 22 Dec 2009 14:00:02 EST news180711805 Researchers from the University of Alabama at Birmingham (UAB) have discovered that restricting consumption of glucose, the most common dietary sugar, can extend the life of healthy human-lung cells and speed the death of precancerous human-lung cells, reducing cancer's spread and growth rate. http://phys.org/news180298600.html Medicine & Health Thu, 17 Dec 2009 18:57:20 EST news180298600 (PhysOrg.com) -- A new paper from MIT biology professor Leonard Guarente strengthens the link between longevity proteins called sirtuins and the lifespan-extending effects of calorie restriction. http://phys.org/news180036887.html Medicine & Health Mon, 14 Dec 2009 19:00:02 EST news180036887 Scientists searching for the secrets of how calorie-restricted diets increase longevity are reporting discovery of proteins in the fat cells of human volunteers that change as pounds drop off. The proteins could become markers for monitoring or boosting the effectiveness of calorie-restricted diets — the only scientifically proven way of extending life span in animals. Their study appears online in ACS' Journal of Proteome Research. http://phys.org/news179589014.html Medicine & Health Wed, 09 Dec 2009 14:30:02 EST news179589014 In spite of their genetic similarity to humans, chimpanzees and great apes have maximum lifespans that rarely exceed 50 years. The difference, explains USC Davis School of Gerontology Professor Caleb Finch, is that as humans evolved genes that enabled them to better adjust to levels of infection and inflammation and to the high cholesterol levels of their meat rich diets. http://phys.org/news178988828.html Medicine & Health Wed, 02 Dec 2009 16:00:02 EST news178988828