宜宾那个医生做双眼皮好(宜宾注射玻尿酸要多少钱) (今日更新中)

WASHINGTON, April 5 (Xinhua) -- NASA and co-researchers from the United States, the Republic of Korea and Japan have found a new mineral named "Wassonite" in one of the most historically significant meteorites recovered in Antarctica in December 1969, the U.S. space agency said on Tuesday in a statement.The new mineral was discovered within the meteorite officially designated Yamato 691 enstatite chondrite. The meteorite likely may have originated from an asteroid orbiting between Mars and Jupiter. Wassonite is among the tiniest, yet most important, minerals identified in the 4.5-billion-year-old sample.The research team, headed by NASA space scientist Keiko Nakamura-Messenger, added the mineral to the list of 4,500 officially approved by the International Mineralogical Association."Wassonite is a mineral formed from only two elements, sulfur and titanium, yet it possesses a unique crystal structure that has not been previously observed in nature," said Nakamura-Messenger.In 1969, members of the Japanese Antarctic Research Expedition discovered nine meteorites on the blue ice field of the Yamato Mountains in Antarctica. This was the first significant recovery of Antarctic meteorites and represented samples of several different types.As a result, the United States and Japan conducted systematic follow-up searches for meteorites in Antarctica that recovered more than 40,000 specimens, including extremely rare Martian and lunar meteorites.Researchers found Wassonite surrounded by additional unknown minerals that are being investigated. The mineral is less than one-hundredth the width of a human hair or 50x450 nanometers. It would have been impossible to discover without NASA's transmission electron microscope, which is capable of isolating the Wassonite grains and determining their chemical composition and atomic structure."More secrets of the universe can be revealed from these specimens using 21st century nano-technology," said Nakamura- Messenger.The new mineral's name was approved by the International Mineralogical Association. It honors John T. Wasson, professor at the University of California, Los Angeles. Wasson is known for his achievements across a broad swath of meteorite and impact research, including the use of neutron activation data to classify meteorites and to formulate models for the chemical makeup of bulk chondrites.

WASHINGTON, May 4 (Xinhua) -- The U.S. National Aeronautics and Space Administration (NASA) announced Wednesday that its Gravity Probe B (GP-B) mission has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test.The experiment, launched in 2004, used four ultra-precise gyroscopes to measure the hypothesized geodetic effect, the warping of space and time around a gravitational body, and frame- dragging, the amount a spinning object pulls space and time with it as it rotates.GP-B determined both effects with unprecedented precision by pointing at a single star, IM Pegasi, while in a polar orbit around Earth. If gravity did not affect space and time, GP-B's gyroscopes would point in the same direction forever while in orbit. But in confirmation of Einstein's theories, the gyroscopes experienced measurable, minute changes in the direction of their spin, while Earth's gravity pulled at them.The findings are available online in the journal Physical Review Letters."Imagine the Earth as if it were immersed in honey. As the planet rotates, the honey around it would swirl, and it's the same with space and time," said Francis Everitt, GP-B principal investigator at Stanford University. "GP-B confirmed two of the most profound predictions of Einstein's universe, having far- reaching implications across astrophysics research."GP-B is one of the longest running projects in NASA history, with agency involvement starting in the fall of 1963 with initial funding to develop a relativity gyroscope experiment. Subsequent decades of development led to groundbreaking technologies to control environmental disturbances on spacecraft, such as aerodynamic drag, magnetic fields and thermal variations. The mission's star tracker and gyroscopes were the most precise ever designed and produced.GP-B completed its data collection operations and was decommissioned in December 2010."The mission results will have a long-term impact on the work of theoretical physicists," said Bill Danchi, senior astrophysicist and program scientist at NASA Headquarters in Washington. "Every future challenge to Einstein's theories of general relativity will have to seek more precise measurements than the remarkable work GP-B accomplished."

DAVOS, Switzerland, Jan. 28 (Xinhua) -- China and Switzerland formally launched bilateral talks on a free trade agreement Friday.Speaking at the opening ceremony, Chinese Commerce Minister Cheng Deming said the agreement talks between China and Switzerland have attracted huge attention and interest from the countries' leadership and business communities.Cheng expected a successful conclusion of the FTA negotiations. Cheng said a free trade agreement would enhance mutual trust between the two sides and promote economic development and closer ties between China and Switzerland.Swiss Federal Councilor Johann Schneider-Ammann expressed similar aspirations for the agreement as did his Chinese counterpart."The free trade agreement would further enhance trade and investment relations on a mutually beneficial basis, but also create many new opportunities for close exchange and cooperation," Schneider-Ammann said.China and Switzerland have seen fast-growing bilateral trade and investments for decade. In the past 10 years, China's exports to Switzerland have grown by 18 percent while Switzerland registered an even stronger 25 percent surge in exports to China.Currently, China is the largest trading partner of Switzerland in Asia, while Switzerland ranks ninth among China's trading partners in Europe.The Chinese commerce minister is leading a delegation at Davos to attend the World Economic Forum, which started Wednesday.

LOS ANGELES, April 27 (Xinhua) -- Air pollution poses a threat to the health of about 154 million Americans -- or more than half of the U.S. population, the American Lung Association (ALA) said on Wednesday.The air is so polluted in some areas that it is often dangerous to breathe, the ALA said in its annual report on air quality across the United States.About 48 percent of U.S. residents live in counties where smog (ozone) is too high, 20 percent live in areas where there are too many short-term spikes in pollution and six percent live in areas with harmful year-round soot (particle pollution), said the report.About 17 million Americans live in areas afflicted by all three air pollution hazards, the report noted.The report listed California as the most polluted state, where people are breathing some of the worst air.Compared with other states, California has more polluted places, including Los Angeles, Long Beach, Riverside, Bakersfield and Fresno, the report said.Honolulu in Hawaii and Santa Fe-Espanola in New Mexico are the only two cities in the nation that had no days in which smog and soot levels reached unhealthy ranges, making them the cleanest cities in the nation, said the report.Research suggests air pollution threatens human health -- and not just the lungs.Small particles of pollution can lodge deep in the lungs, triggering an inflammatory process that, over time, can spread elsewhere in the body and damage blood vessels and the heart, according to Dr. Norman Edelman, the ALA's chief medical officer.On days in which smog levels spike, there's an increase in hospital admissions for respiratory illnesses, heart attacks and stroke in the two or three days following it, said Michael Jerrett, a professor of environmental health sciences at University of California, Berkeley's School of Public Health.In addition to posing both long-term and short-term risks, pollution can also contribute to low birth weights, diabetes, cardiovascular disease, heart attack, stroke and, ultimately, shorter life spans, he warned.

BEIJING, Feb. 14 (Xinhua) -- "Dear Premier Wen, I'd like to tell you the good news first. The problem I brought up at the seminar last year has been solved in Beijing," wrote 34-year-old, wheelchair-bound Li Nan to Chinese Premier Wen Jiabao on Jan. 20 this year.The problem Li referred to was the high prices of one-off hygiene products that had plagued people with work-related spinal cord injuries for a long time.On Jan. 31, 2010, Wen talked with a group of ordinary people in Chaoyang District in Beijing to get their opinions on the draft of a government work report that will be submitted to the national legislature in March.Wen asked Li to be the first to voice her views at the seminar. Li said that patients with spinal cord injuries had to spend about 2,000 yuan (303 U.S. dollars) a month on one-off hygiene products because of their incontinence."My injury allowance is roughly 2,000 yuan a month. I have to live on my parents' pension," she said.She suggested giving more attention to the employment and mental health of the disabled, and also for some revisions on the catalogue of drug and auxiliary devices for those disabled by work-related injuries. She also proposed more subsidies for these people.Responding to the suggestions, Wen said, "Li Nan's case is far from an individual one. The disabled are a very large group of people in China who need more attention... We need to study, revise and renew the government regulations on work-related injury insurance."Wen also encouraged Li to be optimistic in face of ordeals.Li, who graduated from Beijing Youth Politics College in 1997, was once a prize-winning amateur dancer. However, she became confined to a wheelchair after a traffic accident in 2003.On March 5 last year, Li beamed with pride as she watched TV. Premier Wen was delivering the government work report at the annual session of the national legislature.Wen pledged to "work harder to build the social security and social services system for people with disabilities." The premier also promised that "Workers' compensation will be extended to all of the 1.3 million workers injured in previous jobs who are not receiving benefits.""I am thrilled to see that my advice on improving social security for the disabled was included in the government work report," Li said in her letter, which summarized the changes she experienced in the past year because of the improved social security system.The Beijing Municipal Human Resources and Social Security Bureau announced last year that people would be reimbursed for one-off diapers and urine bags under the municipal work-related injury insurance program beginning June 2010."The Beijing policy has relieved our heavy economic burdens and ensured the quality of our life," Li wrote.Li, however, said that though some places has begun to give living and nursing subsidies for the disabled, the policy needs to be extended to other parts of the country.After reading the letter on Jan. 31, Wen Jiabao instructed relevant organs in the State Council, or Cabinet, and the Beijing municipal government "to conduct research and set down policies to better protect and aid people with serious disabilities, and to help them solve their difficulties and improve their quality of life."

来源：资阳报