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LOS ANGELES, May 2 (Xinhua) -- An asteroid will fly past Earth this fall at a close approach that will allow a close-up view of one of Earth's good-sized space rocks, NASA's Jet Propulsion Laboratory (JPL) announced on Monday."On November 8, asteroid 2005 YU55 will fly past Earth and at its closest approach point will be about 325,000 kilometers away," said Don Yeomans, manager of NASA's Near-Earth Object Program Office at the JPL in Pasadena, Los Angeles."This asteroid is about 400 meters wide -- the largest space rock we have identified that will come this close until 2028."Despite the relative proximity and size, "YU55 poses no threat of an Earth collision over, at the very least, the next 100 years, " Yeomans said in a press release."During its closest approach, its gravitational effect on the Earth will be so miniscule as to be immeasurable. It will not affect the tides or anything else.""While near-Earth objects of this size have flown within a lunar distance in the past, we did not have the foreknowledge and technology to take advantage of the opportunity," said Barbara Wilson, a scientist at JPL. "When it flies past, it should be a great opportunity for science instruments on the ground to get a good look.""The best resolution of the radar images was 7.5 meters per pixel," said JPL radar astronomer Lance Benner. "When 2005 YU55 returns this fall, we intend to image it at 4-meter resolution with our recently upgraded equipment at the Deep Space Network at Goldstone, California. Plus, the asteroid will be seven times closer. We're expecting some very detailed radar images."Asteroid 2005 YU55 was discovered in December 2005 by Robert McMillan, head of the NASA-funded Spacewatch Program at the University of Arizona, Tucson. The space rock has been in astronomers' crosshairs before.In April 2010, Mike Nolan and colleagues at the Arecibo Observatory in Puerto Rico generated some ghostly images of 2005 YU55 when the asteroid was about 2.3 million kilometers from Earth.

HONG KONG, March 18 (Xinhua) -- After over a year's efforts, scientists from Shanghai and Hong Kong announced on Friday that they have completed the whole genomic sequencing work of Isaria cicada, a rare herb highly valued in traditional Chinese medicine, which will help facilitate its further development in medical and nutrition fields.It is the first time that the whole genomic sequence of Isaria cicada has been released, said the scientists from Shanghai Institute of Bio-Asia Life Science and the Hong Kong University of Science and Technology (HKUST), who participated in the research.The result was announced at the International Biomedical Scientists and Biotechnology Forum 2011 held in the day at the Hong Kong Science Park.According to the result, the genomic size of Isaria cicada, a medicine traditionally used to treat children's diseases, is about one eightieth of human genome, containing about 16,000 genes.The tests that had been done proved that Isaria cicada, with many high-quality genes not recognized or used by human beings yet, has been deeply involved in important life processes like metabolism, providing new ways for further development of Isaria cicad in bio-medical area, said a scientist from HKUST.The genome map will also help accelerate the artificial cultivation of Isaria cicada, enhancing its medicine and nutrition value and making it available in a larger market, according to the scientist.

WASHINGTON, April 13 (Xinhua) -- The U.S. Food and Drug Administration (FDA) announced on Wednesday that it has approved the cPAX Aneurysm Treatment System for surgery on brain aneurysms that are difficult to manage because of their size and shape.An aneurysm is a bulge in the wall of a blood vessel, which can rupture as it increases in size, causing hemorrhage or death. Brain aneurysms often produce no symptoms until they grow and press on nerves in the brain, or until they begin to leak blood or rupture.Aneurysms can be repaired in two ways: surgeons can close the base of the aneurysm with a surgical clip, or use a technique commonly known as coiling, in which surgeons use a catheter to thread metallic coils through a blood vessel in the groin and into the blood vessel in the brain that contains the aneurysm. Surgeons then fill the aneurysm with the detachable coils, which block it from circulation and cause blood to clot, effectively destroying the aneurysm.Aneurysms larger than 10 millimeters are difficult to treat with clipping or coiling. The cPAX device system is indicated for use in those brain aneurysms."Like coiling, the cPAX Aneurysm Treatment System is a form of endovascular repair," said Christy Foreman, director of the Office of Device Evaluation in the FDA's Center for Devices and Radiological Health. "But instead of tiny metallic coils, it uses a special polymer material to fill the space within the aneurysm."According to the FDA, the cPAX device system is indicated for use in adults aged 22 and older and should not be used in patients with an active infection or in those in whom anticoagulation and antiplatelet therapy is contraindicated.

BEIJING, Feb. 2, (Xinhua) -- All Chinese travelers stranded in Egypt are expected to have been returned to China by Thursday, the start of the Spring Festival, said China's national tourism authorities late Wednesday.As of the Spring Festival Eve, most of the Chinese tourists stranded in Egypt due to the country's nation-wide protests had been flown back to China by chartered planes, according to a statement released by the National Holiday Office, an inter-ministerial agency led by the National Tourism Administration.China had sent a total of eight "special commercial flights" to Cairo, Luxor and Hurghada to bring back Chinese citizens stranded in these cities, and six of the planes had returned, carrying 1,371 people, including those from Hong Kong, according to the Chinese Foreign Ministry.The Spring Festival is the Chinese lunar New Year, a time for family reunions, according to Chinese tradition.The National Holiday Office has also issued warnings about traveling to Australia, as tropical cyclone Yasi was expected to make landfall in northeast Queensland late Wednesday local time.

BEIJING, Feb. 12 (Xinhua)-- China said late Saturday that members of the United Nations should work for a broadly-based consensus on the reform of the UN Security Council.Foreign Ministry spokesman Ma Zhaoxu made the remarks in response to a relevant question.Media reports had it that a recently-released declaration by some countries said most of UN member nations supported enlarging the council with new permanent and non-permanent members, and insisted tangible results be achieved in this regard during the Current Session of the UN General Assembly.Ma said China held that UN member nations should seek for a package of solutions for the reform, on the basis of broad and democratic consultation among member nations to accommodate interests and concerns of all parties.He said though some positive progress had been made since inter-government negotiations regarding the reform of the UN Security Council were launched, there were still serious differences within all parties over certain important issues about the reform.China advocated that the more differences the member countries had on the reform, the more necessary for UN member nations to enhance dialogue and consultation, he said."Experience has proven that presetting results for the reform or forcing premature reform plans will not only undermine the unity of UN member nations, but also harm the reform process, which will not be in line with any party's interests," he said.China is ready to maintain contact with all relevant parties, and make joint efforts with other member nations to push forward the reform in a way which can be conducive to safeguarding the overall interests of UN and the unity of the member nations, said Ma.