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SAN FRANCISCO, Nov. 12 (Xinhua) -- Apple has unveiled a worldwide replacement program for the first-generation iPod nano music player due to overheating battery issues, telling owners to stop using the product and get it replaced for free."Apple has determined that, in very rare cases, the battery in the iPod nano (1st generation) may overheat and pose a safety risk. Affected iPod nanos were sold between September 2005 and December 2006," said Apple in a notice posted late Friday on the support section of its official website.The company said the issue has been traced to a single battery supplier that produced batteries with a manufacturing defect. Since the product is five or six years old now, the likelihood of an incident increases.Owners of iPod nano can check the serial number on the back of the product to see if it is eligible for replacement. Apple promises a replacement unit about six weeks after the company received the affected one.The overheating battery issues of the first generation iPod nano have been known for years. In 2008, Japan's Ministry of Economy, Trade and Industry launched an investigation into Apple after dozens of iPod overheating cases were reported, including several incidents of iPod nanos toasting to the point of catching fire and causing minor burns to owners.Last August, a commuter train in Tokyo was delayed during rush hour when passengers complained of a strong burning smell from an overheating iPod nano that had burst apart.The portable music player also cost Apple a 22.5 million-U.S. dollar settlement in 2009 when a class action lawsuit in California alleged iPod nano is prone to scratches and its alleged defects were not disclosed by the company.

BEIJING, Nov. 30 (Xinhuanet) -- Heading football frequently may cause brain damage leading to subtle but serious declines in thinking and coordination skills, a new study suggested as quoted by media reports Wednesday.Researchers used an advanced MRI (Magnetic Resonance Imaging) technique to analyze changes in brain white matter of 32 adult amateur soccer players who head balls 436 times a year on average.The study found players who head football quite frequently -- with 1,000 or more a year -- showed abnormalities similar to traumatic brain injuries suffered in car accidents."This is the first study to look at the effects of heading on the brain using sophisticated diffusion tensor imaging," said Dr. Michael Lipton, a leading researcher and associate director of the Gruss Magnetic Resonance Research Center at the Albert Einstein College of Medicine in New York City."We found the real implication for players isn't from hitting headers once in a while, but repetitively, which can lead to degeneration of brain cells," he added.The researchers compared neurological images of study participants, whose average age was 31, and found those with the highest volume of headers had abnormalities in five areas of the brain, responsible for attention, memory, physical mobility and high-level visual functions.The findings come in the wake of mixed reports on the so-called "cognitive" consequences of frequently heading soccer balls at practice.Dr. Chris Koutures, a pediatrician and sports medicine specialist in Anaheim Hills, California, said the retrospective imaging study was fascinating, but needs more data to effectively determine safe header limits, especially for younger players.Dr. Lipton agreed neuropsychological damage from headers would be hard for a coach or physician to notice since cognitive problems develop gradually, and even players might not be aware of mild memory loss."We can't tell an individual today not to be heading a ball, but caution is a good thing," Lipton said. "We need more research for definitive answers and we have the advanced imaging tools to do it."

NEW YORK, Oct. 3 (Xinhua) -- For the 34-year-old Alexis Steinman, Oct. 3 would have been a great day, because her father Ralph Steinman was announced winner of the 2011 Nobel Prize in Physiology or Medicine.But as she talked to Xinhua at the Rockefeller University where his father worked, she said the day was rather "bittersweet"."This is the moment, but my Dad was not here," said Alexis, trying to hold her tears.The Canadian-born cell biologist Ralph Steinman died of pancreatic cancer on Friday at the age of 68, three days before he was announced the joint winner along with Prof. Bruce Beutler and Prof. Jules Hoffman for the Nobel Prize in Physiology or Medicine."We even talked about the Nobel Prize days before his death," Alexis added."We were like 'OK Dad, I know things aren't going well but the Nobel, they are going to announce it next Monday'. And he was like 'I know I have got to hold out for that. They don't give it to you if you have passed away,'" she said."It's really impossible to describe how our family is feeling right now. We're devastated to have lost Ralph,"Steinman' s son Adam Steinman told reporters at the press conference at Rockefeller University. "We're so incredibly proud of Dad for receiving this wonderful honor ... We know he will live on through his scientific contributions," he said.Rockefeller University president Marc Tessier-Lavigne told reporters during Monday's press conference that the university only heard of Steinman's death from the family about half an hour after news of the Nobel prize came out from Sweden."We are all deeply saddened by his death, " said Tessier- Lavigne , adding that Steinman had been treating himself with a groundbreaking therapy based on his research into the body's immune system.He said Steinman's research has laid the foundation for numerous discoveries in the critically important field of immunology, and it has led to innovative new approaches in how people treat cancer, infectious diseases and disorders of the immune system.Steinman's first student and close colleague Michel Nussenzweig told the press conference packed with reporters, students and professors that "one of the interesting things about Ralph and his discovery is that no one believes it for a really long time.""What was amazing about Ralph was that he just knew that, even though nobody else believed it, this was really important, and he persisted, and finally after a very long time, everyone just found out it was true," Nussenzweig said."Ralph worked until last week. His dream was to use his discovery to make vaccines and it is a dream that is pretty close, and we are all continuing to work to make that come true," he added.The Nobel Foundation made a statement after learning Steinman's death, saying that the decision to award the prize to the Canadian scientist would remain unchanged despite his death, and the prize money will be transferred to his estate.

BEIJING, Jan. 24 (Xinhua) -- Chinese President Hu Jintao and Premier Wen Jiabao on Tuesday exchanged congratulatory messages with their Israeli counterparts Shimon Peres and Benjamin Netanyahu on the 20th anniversary of the establishment of diplomatic ties between the two countries.Hu said the friendly exchanges between the Chinese and the Jewish people go back to ancient times.Since the forging of official ties 20 years ago, friendly cooperative ties between China and Israel have been developing continuously, and the exchanges and cooperation between the two sides in politics, economy and trade, culture, science and technology, agriculture and education have yielded fruitful results and brought tangible benefits to the two countries and the two peoples, Hu said.China attaches great importance to advancing Sino-Israeli ties and is ready to make joint efforts with Israel to take the celebration of the 20th anniversary as an opportunity to further consolidate the traditional Sino-Israeli friendship, deepen mutual cooperation in various fields, increase personnel exchanges on multiple levels, and promote a continuous development of friendly Sino-Israeli cooperative relations, he said.For his part, Peres said Israel and China established official diplomatic ties 20 years ago, which brought the friendship between the two countries to a historic high.He believed that the Israeli-Chinese friendship, which is based on a shared history, common values and ancient culture and tradition, will prevail.Peres said his country pays great attention to its ties with China in all areas, and is willing to conduct mutually beneficial cooperation with China in science and technology and other fields.In his message, Peres wished the Chinese people a "Happy New Year" in the Year of the Dragon.On the same day, Chinese Premier Wen also exchanged congratulatory messages with Israeli Prime Minister Netanyahu.Wen said their bilateral friendly cooperative relations have continued to grow over the last 20 years.Political exchanges between the two countries have been increasingly close, economic and trade cooperation have continued to flourish, and pragmatic cooperation in culture, science and technology, and agriculture has been fruitful, Wen said.China and Israel have their own advantages, as well as huge potential and broad prospects for cooperation, the Chinese premier said.China is ready to continue to expand and deepen its friendly bilateral cooperation with Israel and raise Sino-Israeli ties to a new high, Wen said.For his part, Netanyahu said the Chinese and the Jewish people have always been friends.During the past 20 years, China and Israel succeeded in forging a stable and diversified partnership, he said.The Israeli side is ready to fully explore the potential of bilateral ties and continue to expand cooperation in science and technology, sanitation, agriculture and environmental protection technologies and other fields with China, Netanyahu said.He believed that there will be more opportunities to further consolidate the friendship between the two peoples and deepen bilateral cooperation in the future.Chinese Foreign Minister Yang Jiechi and Israeli Foreign Minister Avigdor Lieberman also exchanged congratulatory messages.

BEIJING, Jan. 27 (Xinhua) -- China is committed to helping African nations to improve their abilities for self-development, Chinese Vice Commerce Minister Gao Hucheng said on Friday.Gao, also International Trade Representative of the Ministry of Commerce, made the remarks in an article published by Xinhua ahead of top Chinese political advisor Jia Qinglin's visit to Africa. Jia, chairman of th