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SYDNEY, Sept. 5 (Xinhua) -- Australian scientists believe " brown fat," a wondrous tissue that burns energy to generate heat, could help people fight obesity, local media reported on Monday.A research team from Sydney's Garvan Institute of Medical Research (GIMR) has worked out how to grow brown fat from stem cells biopsied from adults, raising hopes that one day brown fat could be transplanted in obese people to speed up calories they burn, the Australian Associated Press (AAP) reported.Garvan endocrinologist Paul Lee, who led the research, is optimistic about targeting brown fat as an obesity intervention, commenting "it's a highly metabolically active form of fat, and very exciting that we may be able to stimulate its growth in people."People are born with supplies of brown fat around their neckline to keep them warm as infants, according to scientists at GIMR.Scientists now know that brown fat is present in most, if not all, adults mainly just behind the collarbone.Studies have found that adults with brown fat are slimmer than those without."Although this is early work, it is a proof of concept study showing that the growth of brown fat cells is possible, using precursor cells taken from adult humans, under appropriate stimulation," Lee said."Regardless of whether or not someone has lots of or little brown fat, the precursor cells are universally present. Under the appropriate growth factor and hormonal stimulation, the cells all grow and differentiate into mature brown fat cells."However, Lee warned more work was needed.Lee said even if brown fat was transplanted into obese people or drugs developed to stimulate the growth of brown fat, exercise and a healthy diet would still be crucial to aiding weight loss."So I don't think this is a solution to obesity because there are so many other factors (involved in obesity)," he said."Despite how efficient brown fat is at burning energy, we would only need a few doughnuts to diminish or negate its benefits."Lee said it would be years before tests could be carried out on brown fat transplants.In the meantime, he is expanding his study to test different ways to grow brown fat.His study, to be printed in the October issue of Endocrinology, has been published in the online edition of the journal.

BEIJING, Aug. 3 (Xinhuanet) -- The first man in Britain who received a complete plastic heart is allowed to leave hospital and live a relatively normal life at home.Matthew Green, 40, who was dying from arrhythmogenic right ventricular cardiomyopathy, was awaiting a transplant when his condition became so bad that the doctors at Papworth Hospital, the world renowned heart center near Cambridge, decided to give him Britain’s first ever full artificial heart.During a six-hour operation on June 9, 2011, surgeons replaced Mr Green's damaged heart with the device which will serve the role of muscles and ventricles.Unlike previous artificial hearts, they have usually only replaced parts of the organ, the new one is powered by a pump which sits outside the body and can be held in a backpack or shoulder bag.All Mr Green has to do is replace the batteries in the pump every few hours and the heart should last up to three years.Transplant milestones1964 US National Institutes of Health starts artificial heart programme.1966 First transplant of partial mechanical heart, to assist pumping of ventricle.1969 Texas man receives first total artificial heart transplant. After 64 hours on the mechanical device received a donor organ, but died within two days.1982 Artificial heart designed by Utah University doctor Robert Jarvik implanted into man who survived for 112 days.2001 First surgical implant of internally powered artificial heart, which was charged via transduction through skin.

LOS ANGELES, July 18 (Xinhua) -- The spacecraft Dawn of the National Aeronautics and Space Administration (NASA) has returned the first close-up image of the giant asteroid Vesta after entering its orbit for the first time last week, the Jet Propulsion Laboratory (JPL) announced on Monday.The image taken for navigation purposes shows Vesta in greater detail than ever before, said JPL in Pasadena, California.On July 15, Dawn became the first probe to enter orbit around an object in the main asteroid belt between Mars and Jupiter.When Vesta captured Dawn into its orbit, there were approximately 9,900 miles (about 16,000 kilometers) between the spacecraft and the asteroid.Vesta is 330 miles (about 530 kilometers) in diameter and the second most massive object in the asteroid belt.NASA's Dawn spacecraft obtained this image with its framing camera on July 17, 2011. It was taken from a distance of about 9,500 miles (15,000 kilometers) away from the protoplanet Vesta. Each pixel in the image corresponds to roughly 0.88 miles (1.4 kilometers). Ground- and space-based telescopes have obtained images of Vesta for about two centuries, but they have not been able to see much detail on its surface."We are beginning the study of arguably the oldest extant primordial surface in the solar system," said Dawn principal investigator Christopher Russell from the University of California, Los Angeles, which is responsible for Dawn's mission science. " This region of space has been ignored for far too long. So far, the images received to date reveal a complex surface that seems to have preserved some of the earliest events in Vesta's history, as well as logging the onslaught that Vesta has suffered in the intervening eons."Vesta is thought to be the source of a large number of meteorites that fall to Earth. Vesta and its new NASA neighbor, Dawn, are currently approximately 117 million miles (about 188 million kilometers) away from Earth. The Dawn team will begin gathering science data in August.Observations will provide unprecedented data to help scientists understand the earliest chapter of the solar system and pave the way for future human space missions, according to JPL."Dawn slipped gently into orbit with the same grace it has displayed during its years of ion thrusting through interplanetary space," said Marc Rayman, Dawn chief engineer and mission manager at NASA's JPL. "It is fantastically exciting that we will begin providing humankind its first detailed views of one of the last unexplored worlds in the inner solar system."Although orbit capture is complete, the approach phase will continue for about three weeks. During approach, the Dawn team will continue a search for possible moons around the asteroid; obtain more images for navigation; observe Vesta's physical properties; and obtain calibration data.In addition, navigators will measure the strength of Vesta's gravitational tug on the spacecraft to compute the asteroid's mass with much greater accuracy than has been previously available, according to JPL.Dawn will spend one year orbiting Vesta, then travel to a second destination, the dwarf planet Ceres, arriving in February 2015. The mission to Vesta and Ceres is managed by JPL for the agency's Science Mission Directorate in Washington.Dawn is a project of the directorate's Discovery Program, which is managed by NASA's Marshall Space Flight Center in Huntsville, Alaska.

SAN FRANCISCO, July 12 (Xinhua) -- U.S. videogame giant Electronic Arts Inc. (EA) on Tuesday said it has agreed to buy PopCap Games, a leading provider of casual games for digital platforms, in a deal to accelerate its digital transformation.EA said it will pay about 650 million U.S. dollars in cash and 100 million dollars in shares of EA common stock to acquire privately-held PopCap, the maker of blockbuster games including " Plants vs. Zombies," "Bejeweled" and "Zuma".In addition, PopCap's owners are entitled to receive as much as 550 million dollars in earn-outs if certain earnings targets are met through December 2013, according to EA, which is headquartered in Redwood City in the U.S. state of California.Logos of PopCap Games and Electronic Arts Inc."EA and PopCap are a compelling combination," John Riccitiello, EA's chief executive officer, said in a statement."PopCap's great studio talent and powerful IP add to EA's momentum and accelerate our drive towards a 1-billion-dollar digital business," he noted.PopCap is one of the largest providers of casual videogames for mobile phones, tablets, PCs and social network sites, with more than 150 million games installed and played worldwide on platforms such as Facebook, RenRen, Google, iPhone, iPad and Android.EA said the purchase of PopCap is expected to close in August this year, subject to customary closing conditions including regulatory approvals.

BEIJING, Sept. 26 (Xinhuanet) -- Although it is home to traditional Chinese medicine (TCM), China must do much more to improve its academic research capacity for acupuncture, a form of TCM, to take the lead worldwide on both the academic and clinical sides.At present, among all academic theses on acupuncture indexed by the Science Citation Index (SCI), a leading world thesis index system, only 5 percent are from the Chinese mainland, according to Wang Linpeng, the director of the acupuncture and moxibustion center of the Beijing Hospital of Traditional Chinese Medicine, which is affiliated with the Capital Medical University.Although Chinese acupuncturists absolutely excel worldwide in clinical practice, "they are not as good as their foreign peers in academic capacity, particularly Western-style research methods and lab experiment design," he told China Daily on Friday during the 2011 International Symposium on Acupuncture. A patient suffering from facial paralysis receives acupuncture treatment at a hospital in Nanjing, the capital of Jiangsu province, on Dec 6, 2010.Studies by TCM practitioners - including acupuncturists - largely focus on their area of specialization, and few are in line with global interest in the medical science that has been proven effective over thousands of years, he said."Chinese TCM practitioners are very good at treating conditions, but they are clumsy at showing how and why it really works in an internationally accepted 'language' and 'manner'," said Gao Sihua, chancellor of the Beijing University of Chinese Medicine."It's especially true in TCM circles, where few Chinese practitioners would regularly follow international academic articles and research trends," Wang said.Measured by the number of articles on acupuncture indexed by SCI, the US and European countries lead globally, he said.