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SYDNEY, Aug. 16 (Xinhua) -- People sitting in front of TV for hours on end could shorten their life expectancy by almost five years, according to an Australian study published on Tuesday by the British Journal of Sports Medicine.Researchers from the University of Queensland estimate that for every hour adults spend in front of TV, their life expectancy shortens by almost 22 minutes.Those who watched six hours a day lived 4.8 years less than those who don't watch TV.The study is the first in Australia to look into how TV habits affect longevity.The Australian researchers found that watching TV could have a similar negative impact on life expectancy to that of obesity, smoking and low physical activity."People don't realize how it all adds up," the study's lead author Dr. Lennert Veerman told the Australian Associated Press (AAP)."They should try not to watch too much TV and find alternative things to do, preferably things that are light activities," Veerman said.The study was based on data from the Australian Diabetes, Obesity and Lifestyle study and asked more than 11,000 people aged over 25 about their weekly TV viewing time.The study found that in 2008 Australian adults watched 9.8 billion hours of TV."These findings suggest that substantial loss of life may be associated with prolonged TV viewing time among Australian adults," the study said."TV viewing time may have adverse health consequences that rival those of lack of physical activity, obesity and smoking; every single hour of TV viewed may shorten life by as much as 22 minutes," it said."With further corroborative evidence, a public health case could be made that adults also need to limit the time spent watching TV."Australians are recommended to spend at least 30 minutes a day doing moderate-intensity physical activity to reduce an increased risk of developing cardiovascular disease.

WASHINGTON, June 20 (Xinhua) -- The U.S. Food and Drug Administration (FDA) on Monday unveiled in a report a new strategy to meet the challenges posed by rapidly rising imports of FDA- regulated products and a complex global supply chain.The report, titled "Pathway to Global Product Safety and Quality," calls on the agency to transform the way it conducts business and to act globally in order to promote and protect the health of U.S. consumers.According to the report, the FDA will partner with its counterparts worldwide to create global coalitions of regulators focused on ensuring and improving global product safety and quality. The coalitions of regulators will develop international data information systems and networks, and increase the regular and proactive sharing of data and regulatory resources across world markets.The FDA will build in additional information gathering and analysis capabilities with an increased focus on risk analytics and information technology. It increasingly will leverage the efforts of public and private third parties and industry and allocate FDA resources based on risk."FDA regulated imports have quadrupled since 2000. The FDA and our global regulatory partners recognize this new reality and realize we must work proactively and collaboratively to address the challenges we face," FDA Commissioner Margaret Hamburg said in a statement. "The FDA must further collaborate and leverage in order to close the gap between our import levels and our regulatory resources. This report is an important step in ensuring we are able to fulfill our critical public health mission."

BERLIN, June 8 (Xinhua) -- German health minister Daniel Bahr expressed cautious hope Wednesday for an end to the wave of E. coli infections as authorities reported two more deaths and more than 300 new cases."I can't give an all-clear, but after the analysis of the latest data we have reasons for hope, as the number of new infections is continuously dropping," Bahr told local public television ARD before an emergency meeting in Berlin with European Union Health Commissioner John Dalli."Unfortunately, there will be new cases and more deaths have to be expected, but overall new infections are clearly going down," he said.On the same day, Germany's national disease control center, the Robert Koch Institute, said the number of reported cases in Germany had risen by more than 300 to 2,648. Nearly 700 of those affected have been taken to hospital with a serious complication that can cause kidney failure.The Institute did not fully support Bahr's optimism. It said there was a declining trend in new cases but added it was not clear whether this was because the outbreak was truly waning or because consumers were staying away from the raw vegetables believed to be the source of the E. coli.The German government has faced increasing criticism from abroad and at home over its dealing with the crisis. It was twice wrong in naming the source of the outbreak and it has been criticized for a lack of coordination between research institutes.Dalli was quoted by local daily Die Welt as saying, "we have to rely on the experience and expertise across Europe, and even outside Europe."The Max Planck Institute for Infection Biology in Berlin also called for a federal government representative to coordinate the various government agencies dealing with the disease to eliminate mixed messages.

WASHINGTON, Sept. 14 (Xinhua) -- Controlling diabetes may someday involve mining stem cells from the lining of the uterus, Yale School of Medicine researchers report in a new study published Wednesday in the journal Molecular Therapy. The team treated diabetes in mice by converting cells from the uterine lining into insulin-producing cells.The endometrium or uterine lining, is a source of adult stem cells. These cells generate uterine tissue each month as part of the menstrual cycle. Like other stem cells, however, they can divide to form other kinds of cells.Led by Yale Professor Hugh Taylor, the researchers bathed endometrial stem cells in cultures containing special nutrients and growth factors. Responding to these substances, the endometrial stem cells adopted the characteristics of beta cells in the pancreas that produce insulin. Over the course of a three- week incubation process, the endometrial stem cells took on the shape of beta cells and began to make proteins typically made by beta cells. Some of these cells also produced insulin.After a meal, the body breaks food down into components like the sugar glucose, which then circulates in the blood. In response, beta cells release insulin, which allows the body's cells to take in the circulating glucose. In this study, Taylor and his team exposed the mature stem cells to glucose and found that, like typical beta cells, the cultured cells responded by producing insulin. The team then injected diabetic mice with the mature, insulin-making stem cells. The mice had few working beta cells and very high levels of blood glucose.Mice that did not receive the stem cell therapy continued having high blood sugar levels, developed cataracts and were lethargic. In contrast, mice that received the cell therapy were active and did not develop cataracts, but the animals' blood sugar levels remained higher than normal.The Yale team's findings suggest that endometrial stem cells could be used to develop insulin-producing islet cells, which are found in the pancreas. These islet cells could then be used to advance the study of islet cell transplantation to treat people with diabetes.Taylor said in a statement that the next step in the research will be to verify how long this treatment remains effective.

BEIJING, June 29 (Xinhuanet) -- Twitter Inc. co-founders Biz Stone and Evan Williams said they are moving on from the microblogging service, media reports said Wednesday.“The Twitter crew and its leadership team have grown incredibly productive,” Stone said on the blog. “I’ve decided that the most effective use of my time is to get out of the way until I’m called upon to be of some specific use.”The two will continue to advise Twitter on strategic matters, but devote the lions' share of their time to The Obvious Corporation, Stone said.Obvious was first created by Williams to buy back a company from investors that he and Stone failed to sell about six years ago, Stone said. The two began working together after leaving Google in 2005.The company will also be run by Jason Goldman, a former Twitter executive, Stone said.