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WASHINGTON, June 14 (Xinhua) -- Short sleep duration may contribute to the development or worsening of hyperactivity and inattention during early childhood, suggests a research abstract that was presented Tuesday at SLEEP 2011, the 25th Anniversary Meeting of the Associated Professional Sleep Societies LLC.Results show that less sleep in preschool-age children significantly predicted worse parent-reported hyperactivity and inattention at kindergarten. The sample consisted of approximately 6,860 children, and analyses controlled for gender, ethnicity and family income."Children who were reported to sleep less in preschool were rated by their parents as more hyperactive and less attentive compared to their peers at kindergarten," said lead author Erika Gaylor, senior researcher for SRI International, an independent, nonprofit research institute in Menlo Park, California. "These findings suggest that some children who are not getting adequate sleep may be at risk for developing behavioral problems manifested by hyperactivity, impulsivity, and problems sitting still and paying attention." According to the authors, attention-deficit/hyperactivity disorder (ADHD) is not generally diagnosed until the school-age years. However, the onset of developmentally inappropriate inattention, hyperactivity and impulsivity is often much younger. Sleep problems, particularly difficulty falling asleep and staying asleep, are frequently reported in children and adolescents with ADHD. However, the direction of causation, if any, has been difficult to determine. Longitudinal studies may provide a window into the direction of this complex relationship.Last year at SLEEP 2010, Gaylor reported that having a regular bedtime was the most consistent predictor of positive developmental outcomes at four years of age. Having an earlier bedtime also was predictive of higher scores for most developmental measures.

COPENHAGEN, June 7 (Xinhua) -- The outbreak of infections caused by E. coli bacteria may be over in Denmark as no new cases have been reported here since Friday.According to Denmark's National Serum Institute (NSI), there are 18 confirmed cases of severe intestinal infection caused by exposure to the bacteria as of Monday. No new infections have been reported since Friday, it added.The confirmed cases are said to consist of 10 men and 8 women aged between 23 and 81 years of age. Seven show symptoms of kidney failure which is associated with advanced stages of the infection.All but one are believed to have contracted the infection while traveling in northern Germany, where the outbreak started, the NSI said.So far, the E. coli infection has claimed 21 lives in Germany, which reports over 2,100 confirmed and suspected cases. It has also spread to 12 countries according to the World Health Organization (WHO)."This particular strain of E.coli has been identified in some people sporadically in the past, but it has not been known to have been associated with outbreaks in the past," a WHO spokesperson said Friday, adding it was a "very, very rare strain."Health authorities in Germany now suspect bean sprouts as the source of contamination in this outbreak, although this is yet to be confirmed.Dr Kaare Moelbak, an epidemiologist at NSI told Danish media Sunday that bean sprouts were a "very likely" source of contamination.Cucumbers were initially suspected and Denmark's food authority continues to warn against eating raw tomato, cucumber or lettuce from Germany until the source is established.Children are normally most vulnerable to E. coli infection but most of those infected in this outbreak are above the age of 20 years, Moelbak told Xinhua last week.He said children are likely less affected by this outbreak as they usually eat fewer salads than adults.In Germany, it is mostly women who have been affected by the infection. Moelbak explained the skew in infections saying women tend to choose to eat more vegetables than men, in comments made to Danish media Thursday.

BEIJING, June 10 (Xinhua) -- The nation's drug watchdog on Friday publicized a draft national standard of sulfur dioxide residue in Chinese herbal medicine, which is open for public opinion until Sept. 9 this year.The maximum amount of sulfur dioxide residue is 400 mg in one kg of each of 11 specified kinds of herbal medicine, such as Chinese yams, Gastrodia elata and Codonopsis pilosola, according to the draft standard unveiled by the State Food and Drug Administration (SFDA).The standard provides a 150-mg-per-kg limit for all other kinds of herbal medicine.Fumigation with sulfur is used as a way of drying some herbal medicine by growers, and currently have no alternative that is both cheap and convenient.The SFDA said it doesn't favor the drying herbal medicine through fumigation with sulfur and urges research efforts to invent new alternatives.According to the World Health Organization, the tolerable maximum amount of sulfur dioxide that a human body can take in one day is 0.7 mg per kg, which means that an adult of 60 kg should not take in more than 42 mg of sulfur dioxide a day.Long-term exposure to high amounts of sulfur dioxide can cause damage to human body, especially the respiratory system, according to experts. 

SAN FRANCISCO, June 6 (Xinhua) -- Apple's chief executive officer Steve Jobs on Monday took a break from his medical leave to introduce the company's new cloud-based service iCloud.Jobs, in his trademark black turtleneck and jeans, got a standing ovation in San Francisco's Moscone Center when he appeared on stage. Someone screamed "I love you," and Jobs said " it always helps and I appreciated it.""ICloud stores your content in the cloud and wirelessly pushes it to all your devices," said Jobs, calling it Apple's "next big insight."According to Apple, iCloud Backup will automatically back up users' iOS devices to iCloud daily over Wi-Fi when they charge their iPhone, iPad or iPod touch. Backup content includes purchased music, apps, camera roll, device settings and app data. It will also automatically upload documents from iWork in the cloud and pushes them to users' all relevant devices.The service will currently be free and replaces the former MobileMe which Apple once charged 99 U.S. dollars per year.Users will get five gigabytes of memory which is not counting purchased apps, music or books. A beta version is available on Monday and the final version will be shipping with iOS 5 this fall, with paid plans for more storage to be announced at that time.For a 24.99-dollar paid music plan named iTunes Match, a user's iTunes library will be scanned and they will gain instant access to those tracks or albums from compatible devices, rather than uploading them. Song files, including those converted from CDs, will also be uploaded to iCloud if they are not matched in iTunes stores but recognized by music labels.Jobs pointed out that iTunes Match paid plan is cheaper than Amazon's offering and Google has not announced a price yet, saying "it's an industry leading effort."The Apple CEO finally showed a photo of the company's new, massive data center in North Carolina to emphasize Apple is ready for iCloud service.Before Jobs, Apple executives introduced Lion, the eighth major release of Mac OS X and iOS 5, the next version of Apple's mobile operating system.Phil Schiller, Apple's marketing chief and Craig Federighi, the OS X software vice president, introduced ten key new features among the 250 ones of the new Mac operating system, including multi-touch features that bring the users experience on iPhone to their computers.Lion will be available to customers in July in Mac App Store. The price is adjusted to 29.99 dollars from 129 dollars Apple used to charge for upgrades.Scott Forstall, head of Apple's iOS software, demoed Apple's new mobile operating system, noting that iOS already has 44 percent of the mobile operating system market.The new version iOS 5 will have more than 200 new features, including a Notification Center that catches missed calls, mail messages and phone messages; and a feature called Reminder that provides virtual Post-it notes using geolocation technology.The new mobile operating system also integrates Twitter with many other iPhone apps and has a Newsstand on which the newspaper and magazines icons will be the actual covers of the publications.Apple said that iOS 5 is coming to the public this fall, which probably means the new iPhone is coming in the fall as well.Apple's new services are unveiled at its annual Worldwide Developers Conference (WWDC). Jobs kicked off the keynote event by saying that Apple had sold out 5,200 tickets to attendees just in two hours.

WASHINGTON, July 8 (Xinhua) -- U.S. President Barack Obama on Friday hailed space shuttle Atlantis' final flight in NASA's shuttle program, saying Americans across the country watched with pride as America reached for the heavens once more.Obama expressed his "sincere gratitude" to Atlantis astronauts and space workers because they "helped our country lead the space age.""Today's launch may mark the final flight of the space shuttle, " Obama said in a statement. "But it propels us into the next era of our never-ending adventure to push the very frontiers of exploration and discovery in space."Friday's flight is the 33rd voyage for Atlantis. Its return to the earth later this month will mark the end of the 30-year shuttle program."What a truly awesome day today," said NASA Associate Administrator for Space Operations Bill Gerstenmaier at the STS- 135 postlaunch news conference. "What you saw is the finest launch team and shuttle preparation teams in the world.""It truly was an awesome, spectacular launch," added Kennedy Space Center Director Bob Cabana, who looked ahead to plans for future development beyond the shuttle program as space station operations continue.Atlantis will be the last shuttle to be retired. Discovery was first in March, followed by Endeavour at the beginning of June. Each shuttle will head to a museum.When the U.S. space shuttle program officially ends later this year, the Russian space program's Soyuz capsule will be the only method for transporting astronauts to and from the station.

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