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SAN FRANCISCO, Aug. 9 (Xinhua) -- Nokia is planning to stop selling its low-end phones and smartphones in the United States, instead focusing on products using Microsoft's Windows Phone platform, U.S. media reported on Tuesday.The Finnish handset maker will end sales of its low-end Series 40 phones and smartphones based on the Symbian mobile operating system in the United States and Canada, as it needs to put all of its efforts into the Windows Phone products which are due out later this year, Chris Weber, head of Nokia's U.S. subsidiary, told technology news site All Things Digital."When we launch Windows Phones we will essentially be out of the Symbian business, the S40 business, etc.," Weber said.Staff members speak to trade visitors at the Nokia booth at the CommunicAsia expo in Singapore June 21, 2011.In February, Nokia and Microsoft announced plans to form a broad strategic partnership, under which Nokia agrees to adopt Windows Phone as its principal smartphone strategy.North America is a priority for Nokia, Weber noted, in part because it is a key market for Microsoft and also because Nokia sees it as a key to winning in the smartphone battle globally."We'll develop for North America and make the phones globally available and applicable," Weber said.In another development, technology blog Engadget and other U.S. media on Tuesday reported that Nokia will not bring N9, its first smartphone running the Linux-based mobile operating system MeeGo, to the U.S. market."After the very positive reception to the launch of the Nokia N9, the product is now being rolled out in countries around the world. At this time we will not be making it available in the U.S., " Nokia said in a statement.

WASHINGTON, July 13 (Xinhua) -- Human neural stem cells are capable of helping people regain learning and memory abilities lost due to radiation treatment for brain tumors, a University of California, Irvine (UCI) study suggests.Research with rats found that stem cells transplanted two days after cranial irradiation restored cognitive function, as measured in one- and four-month assessments. In contrast, irradiated rats not treated with stem cells showed no cognitive improvement."Our findings provide solid evidence that such cells can be used to reverse radiation-induced damage of healthy tissue in the brain," said Charles Limoli, a UCI radiation oncology professor.Study results will appear Friday in Cancer Research, a journal of the American Association for Cancer Research.Radiotherapy for brain tumors is limited by how well the surrounding tissue tolerates it. Patients receiving radiation at effective levels suffer varying degrees of learning and memory loss that can adversely affect their quality of life."In almost every instance, people experience severe cognitive impairment that's progressive and debilitating," Limoli said. " Pediatric cancer patients can experience a drop of up to three IQ points per year."For the UCI study, multipotent human neural stem cells were transplanted into the brains of rats that had undergone radiation treatment. They migrated throughout the hippocampus -- a region known for the growth of new neurons -- and developed into brain cells.Researchers assessed the rats one month and four months after transplantation, noting enhanced learning and memory abilities at both intervals.Additionally, they found that transplanting as few as 100,000 human neural stem cells was sufficient to improve cognition after cranial irradiation. Of cells surviving the process, about 15 percent turned into new neurons, while another 45 percent became astrocytes and oligodendrocytes -- cells that support cerebral neurons.Most notably, Limoli said, he and his colleagues discovered that about 11 percent of the engrafted cells expressed a behaviorally induced marker of learning, indicating the functional integration of those cells into memory circuits in the hippocampus."This research suggests that stem cell therapies may one day be implemented in the clinic to provide relief to patients suffering from cognitive impairments incurred as a result of their cancer treatments," Limoli said.

BEIJING, Aug. 16 (Xinhuanet) -- Almost one in four Chinese students aged between 12 and 14 have tried smoking, according to the results of a survey released by the Chinese Association on Tobacco Control (CATC).The survey, carried out among 38,839 students and 6,503 teachers from middle and high schools in 11 provinces across the country between May and June, showed that 22.5 percent of students aged between 12 and 14 had tried smoking and that 15.8 percent of middle and high school students smoke regularly."There are definitely quite a number of boy students in my class who smoke regularly as some have been found smoking outside campus during lunch break," said Li Xiaolan, an English teacher from a high school in Shanghai. The survey also found that 39 percent of students took their first cigarette from their classmates."It was quite common to smoke with my classmates at school and we usually smoked in toilets or in corners of the playground after lunch," said Zhou Guangrong, a 22-year-old university student from Guiyang, Guizhou province, who started smoking when he was 12.The majority of student smokers buy cigarettes themselves and about 76 percent of the adolescent smokers said that there is at least one cigarette shop within 200 meters from their school."When I was a student at middle and high schools, they were surrounded by cigarette shops," said Zhou who used to smoke two cigarettes per day in primary school and two packs per week in middle and high school."We're keen to show that more adolescents are starting smoking much younger than before, and that we need to minimize the number of young smokers," said Duan Jiali, secretary-general of the youth tobacco control commission under CATC. Duan added that teachers and parents should set a good example for teenagers by not smoking in front of them at school or at home, which is the most influential way of stopping adolescents from smoking.China banned smoking in 16 types of public indoor venues - including hospitals, schools, bars, restaurants and hotels - on May 1 in an attempt to curb tobacco use in the country with the world's largest number of smokers.Currently, there are more than 300 million smokers in China, and about 1.2 million people die from smoking-related diseases every year, accounting for one-fifth of the world's total, according to statistics from the World Health Organization."Meanwhile, about 540 million people are exposed to secondhand smoke, 48.9 percent of which are adolescents (from 15 to 19 years old)," said Xu Guihua, deputy director of the CATC."It's essential and urgent for us to control the number of adult smokers who potentially tempt adolescents to smoke."

WASHINGTON, July 18 (Xinhua) -- The U.S. National Aeronautics and Space Administration (NASA) on Monday commemorated the 90th birthday of astronaut John Glenn, the first U.S. astronaut to orbit the Earth and also the oldest person to fly to space when he launched on the space shuttle in 1998."John Glenn is a legend, and NASA sends him our best wishes on this major personal milestone," NASA Administrator Charles Bolden said in a statement. "John's legacy and contributions to the continued progress of human spaceflight are immense. His example is one we continue to emulate as we push toward farther destinations in the solar system."After a distinguished flying career with the Marines in World War II and Korea, Glenn joined NASA in 1959 as one of the country' s first astronauts in Project Mercury. On Feb. 20, 1962, Glenn piloted the Mercury-Atlas 6 "Friendship 7" spacecraft on the first U.S. manned orbital mission. He launched from NASA's Kennedy Space Center in Florida to successfully complete three orbits of the Earth.Glenn flew to space again on the STS-95 mission in 1998 aboard the space shuttle Discovery. As a mission specialist, Glenn supported deployment of a variety of research payloads and participated in investigations about spaceflight and the aging process.

BEIJING, Sept. 1 (Xinhua) -- Medicine prices at public clinics have been notably reduced thanks to a policy that promotes basic medicine, an office of the State Council said Thursday.Current price levels of basic medicine used by government-funded township hospitals and community clinics have been reduced an average of 25 percent from the levels two years ago when the policy started, according to a statement from the State Council office in charge of reforming the country's healthcare program.China has introduced a state list of basic medicine used by government-funded township hospitals and community clinics, which includes roughly 300 types of commonly-used Western and traditional Chinese medicine.Provincial governments will purchase basic medicine through public bidding and distribute them to local clinics.These clinics must not raise the prices of listed medicine and in return, the government will provide them with subsidies.The policy has been implemented at all township and community clinics in all the 31 provinces, municipalities and autonomous regions in the Chinese mainland, the statement said.