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WASHINGTON, March 30 (Xinhua) -- A trace amount of radioactive iodine has been found in a sample of milk from the west state of Washington, the U.S. Environmental Protection Agency and the Food and Drug Administration (FDA) said Wednesday.According to a joint statement from the two agencies, results from a screening sample taken March 25 from Washington detected 0.8 pCi/L of iodine-131, which is more than 5,000 times lower than the Derived Intervention Level set by the FDA.These types of findings are to be expected in the coming days and are far below levels of public health concern, including for infants and children, the statement said.Iodine-131 has a very short half-life of approximately eight days, and the level detected in milk and milk products is therefore expected to drop relatively quickly."Radiation is all around us in our daily lives, and these findings are a minuscule amount compared to what people experience every day. For example, a person would be exposed to low levels of radiation on a round trip cross country flight, watching television, and even from construction materials," said Patricia Hansen, an FDA senior scientist.

SAN FRANCISCO, May 3 (Xinhua) -- Apple Inc. announced on Tuesday that it has updated its iMac all-in-one desktop, adding Intel's next generation quad-core processors, Thunderbolt data ports and a new HD camera.Starting at 1,199 U.S. dollars, the new iMac is up to 70 percent faster and its new graphics deliver up to three times the performance of the previous generation, Apple said in a statement.The new iMac features quad-core Intel Core i5 processors with an upgrade option to Core i7 processors.The 21.5-inch model has a single Thunderbolt port while the 27- inch has two, in addition to four USB 2.0 inputs and a FireWire 800 port.Thunderbolt, which debuted with Apple's updated MacBook Pro notebooks in February, is also an Intel design bringing together high-speed data transfer and high-definition display onto a single cable. It can transfer a full-length HD movie in less than 30 seconds with a speed of 10 gigabits per second, which is twice the speed of USB 3.0, 12 times faster than FireWire 800 and up to 20 times faster than USB 2.0.The new iMac also includes a built-in FaceTime HD camera, which supports high-definition video calls, Apple said.

CANBERRA, May 10 (Xinhua) -- Technology may have a harmful effect on children's development and creativity, Australia's report found on Tuesday.The Pilot Pen Australia Creativity Report found that children could be depending too much on technology such as computers.Written by psychologist Kimberley O'Brien, the report suggested that students are becoming scared of handwritten tasks as there is no spelling or grammar check tool to pick up their mistakes as they go along."Children who develop this kind of dependency on computer software are less likely to write using a pen and paper given that they will feel a vulnerability to failure," the report said.It said using software that immediately tells children to correct errors like spelling and grammar could disrupts their thought patterns and stunts their ideas, and children who hand write are able to produce almost twice as many ideas as those using computer technology to write a creative story.The report studied 300 Year five and six children, and found handwritten essays were completed significantly faster and contained a higher standard of sentence structure, grammar, punctuation, cohesion, ideas development and organization than those completed using keyboards.A further study found students in Years two, four and six produced up to twice as many ideas writing on pen and paper as those on computers.O'Brien said the results were due to computers putting extra pressure on writers to edit as they go rather than get their ideas down first and edit minor mistakes later.O'Brien said children were most likely to develop their handwriting skills between the ages of eight and 10, and she urged all teachers and parents to ensure their children met community standards for legible handwriting.However, she said that computers are a good support tool, and they should not replace handwriting entirely.

WASHINGTON, May 11 (Xinhua) -- Johns Hopkins University researchers have demonstrated that human liver cells derived from adult cells coaxed into an embryonic state can engraft and begin regenerating liver tissue in mice with chronic liver damage.The work, published Wednesday in the journal Science Translational Medicine, suggests that liver cells derived from so- called "induced-pluripotent stem cells (iPSCs)" could one day be used as an alternative to liver transplant in patients with serious liver diseases, bypassing long waiting lists for organs and concerns about immune system rejection of donated tissue."Our findings provide a foundation for producing functional liver cells for patients who suffer liver diseases and are in need of transplantation," says Yoon-Young Jang, assistant professor of oncology at the Johns Hopkins Kimmel Cancer Center. "iPSC-derived liver cells not only can be generated in large amounts, but also can be tailored to each patient, preventing immune-rejection problems associated with liver transplants from unmatched donors or embryonic stem cells." A microsopic view shows human embryonic stem cells in various stages of differentiation into liver cells in this photo taken at Stanford University and released by the California Institute for Regenerative Medicine, March 9, 2009iPSCs are made from adult cells that have been genetically reprogrammed to revert to an embryonic stem cell-like state, with the ability to transform into different cell types. Human iPSCs can be generated from various tissues, including skin, blood and liver cells.Although the liver can regenerate in the body, end-stage liver failure caused by diseases like cirrhosis and cancers eventually destroy the liver's regenerative ability, Jang says. Currently, the only option for those patients is to receive a liver organ or liver cell transplant, a supply problem given the severe shortage of donor liver tissue for transplantation. In addition, mature liver cells and adult liver stem cells are difficult to isolate or grow in the laboratory, she says. By contrast, iPSCs can be made from a tiny amount of many kinds of tissue; and the embryonic stem- like iPSCs can grow in laboratory cultures indefinitely.For the study, Jang and colleagues generated human iPSCs from a variety of adult human cells, including liver cells, fibroblasts ( connective tissue cells), bone marrow stem cells and skin cells. They found that though the iPSCs overall were molecularly similar to each other and to embryonic stem cells, they retained a distinct molecular "signature" inherited from the cell of origin.

MOSCOW, April 12 (Xinhua) -- Does life exist on other planets beyond the solar system? Are there any other planets like the Earth in our universe? And what does the universe look like?On questions related to outer space, human beings have never stopped observing and thinking.Yuri Gagarin, who made the first manned space flight on April 12, 1961, and orbited Earth for 108 minutes before safely landing, opened a window named "space" to humankind. The Soviet cosmonaut's journey continues to be an inspiration for the world to "conquer" space -- but now for more peaceful purposes.After the Cold War, cooperation on space exploration and scientific researches has turned to a more pragmatic way. More and more countries are realizing that space programs are closely linked with their people's lives than ever before.GAGARIN'S LEGACY INSPIRES PEACEFUL COOPERATION IN SPACEThe UN General Assembly adopted a resolution earlier this month that declares April 12 the International Day of Human Space Flight. The resolution has been supported by more than 60 countries."Man's space odyssey, the fruitful cooperation of many states in outer space would have been impossible without the very first step, Yuri Gagarin's flight," said Vitaly Churkin, Russia's permanent representative to the United Nations.However, the first human space flight was actually a result of competition between the East and the West at the height of the Cold War when the Berlin Wall was built.That competition gradually evolved, however, into a joint space project that has drawn more than 15 nations -- the International Space Station (ISS). Such a project would almost impossible to imagine before.The Mars-500 project in Moscow, aimed at testing the physical and psychological strains on humans during a 500-day journey to "Mars," is another good example of the international cooperation in scientific research. The experiment included six crew members from four countries, including Russia, China, France and Italy.Compared with the times of Gagarin, who died in a 1968 plane crash,mankind has changed its approach to space exploration, rendering it more pragmatic. That's according to cosmonaut Pavel Vinogradov, now a deputy head of the Space Flight Center in the Energy Rocket-Space Corporation."Early romanticism and space race have gone. Countries have been replaced by the business-oriented cooperation in the recent decade," Vinogradov told Xinhua.Experts said the scale and costs of space explorations require massive international cooperation."Space programs have been more money-thirsty even than military programs, so the nations seek closer cooperation," Vinogradov said, "and this pays off."STARDUST YIELDS TO PRAGMATISMUnlike 50 years ago, space technologies now are more closely linked to people and more directly affect their daily lives. Nowadays, one just cannot imagine life without satellite TV or GPS.Veteran cosmonaut Georgy Grechko said orbits have become construction sites rather than military facilities and the space industry itself has swiftly evolved into just another sector of the global economy.Echoing Grechko, Vinogradov said space also is a testing ground for many other sectors, including the bio-technological and pharmaceutical industries."What is just as important, outer space has turned into a platform for close, open, and fruitful international cooperation for the benefits of global, universal peace and development," Russian President Dmitry Medvedev has said.UN General Assembly President Joseph Deiss has said that the newly established International Day of Human Space Flight should serve as an opportunity to reflect on the importance of peaceful use of space to develop essential technologies and scientific breakthroughs."Space technology is used in matters diverse, such as the fight against climate change, against desertification, and against the loss of biodiversity," Deiss said. "The satellite images provided have given essential data when it comes to avoiding the risks of natural disasters."So far, mankind has never stopped making progress beyond the earth's boundaries and the progress itself has never stopped sparking people's imagination about what is possible through the peaceful use and exploration of outer space.What's more, humankind has never stopped the space dream."The task of the government is to inject into the people an ability to dream," said Igor Zadorin, a member of Russia's National Strategy Council.Here is interesting news: NASA's head Charles Bolden arrived in Russia on the eve of Gagarin's flight anniversary and was expected to discuss Russia-U.S. cooperation on a joint flight to Mars by a nuclear-powered spacecraft.What can we expect in the future?