濮阳东方看妇科价格非常低(濮阳东方医院男科治疗早泄技术很权威) (今日更新中)

WASHINGTON, April 6 (Xinhua) -- U.S. researchers have discovered two genes in which variation affects intake of caffeine, the most widely consumed stimulant in the world, according to a report described Wednesday in the open-access journal PLoS Genetics.A team of investigators from the National Cancer Institute, Harvard School of Public Health, Brigham and Women's Hospital, and the University of North Carolina at Chapel Hill examined genetic variation across the entire genome of more than 47,000 individuals from the U.S.They found the genes -- CYP1A2, which has previously been implicated in the metabolism of caffeine, and AHR, involved in the regulation of CYP1A2, played roles in regulating intake of caffeine. Individuals with the highest-consumption genotype for either gene consumed 40 mg more caffeine than those with the lowest-consumption genotype, equivalent to the amount of one-third cup of caffeinated coffee, or one can of cola.Caffeine is implicated in numerous physiological and medical conditions; it affects sleep patterns, energy levels, mood, and mental and physical performance. The identification of genes that have an impact on daily consumption offers opportunities to better understand these conditions. Further exploration of the identified genetic variants may provide insight into the speed of caffeine metabolism, how long caffeine circulates in the blood, or how strong the physiological effects of consuming a given amount of caffeine are.

LOS ANGELES, May 23 (Xinhua) -- NASA's Gravity Recovery And Interior Laboratory spacecraft (Grail) will begin final preparations for a launch on a Moon mission in late summer, the Jet Propulsion Laboratory (JPL) said on Monday.The dynamic duo will orbit the moon to determine the structure of the lunar interior from crust to core and to advance understanding of the thermal evolution of the moon, according to JPL in Pasadena, Los Angeles.After arriving at the Astrotech payload processing facility in Titusville, Florida last week, the Grail twins, known as Grail-A and Grail-B, were removed from their shipping containers Monday. Later this week, they will begin functional testing to verify their state of health, said JPL.The twins were shipped from Lockheed Martin Space Systems, Denver.Over the next four months at the Astrotech facility, the spacecraft will undergo final testing, fueling and packaging in the shroud that will protect them as the Delta II launch vehicle lifts them into space. The spacecraft will then be transported to the Cape Canaveral Air Force Station for installation atop the rocket that will carry them toward the moon, JPL said."We're only a few full moons away from a mission that will reveal clues not only into the history of the moon and Earth, but will provide important data for future lunar exploration," said Maria Zuber, Grail's principal investigator, based at the Massachusetts Institute of Technology.Grail will be carried into space aboard a United Launch Alliance Delta II Heavy rocket lifting off from Launch Complex-19 at the Cape Canaveral Air Force Station in Florida. The launch period opens Sept. 8, 2011, and extends through Oct. 19. For a Sept. 8 liftoff, the launch window opens at 5:37 a.m. PDT (8:37 a.m. EDT) and remains open through 6:16 a.m. PDT (9:16 a.m. EDT).Grail-A and Grail-B will fly in tandem orbits around the moon for several months to measure its gravity field in unprecedented detail.The mission will also answer longstanding questions about Earth' s moon, and provide scientists a better understanding of how Earth and other rocky planets in the solar system formed, according to JPL, which manages the Grail mission.

CANBERRA, May 27 (Xinhua) -- An Australian student has discovered a part of the universe that astrophysicists have spent decades trying to find, Australia's Monash University on Friday confirmed in a statement.Astrophysicists have long thought the universe has a greater mass than is visible in the planets, but they had no way of proving it is there.Undergraduate student Amelia Fraser-McKelvie, 22, was on a summer internship at Monash University to learn more about astrophysics, when she managed to solve one of the big mysteries of science.Fraser-McKelvie, an aerospace engineering student, conducted a targeted X-ray search for the matter and found evidence of it within three months.Her tutor, Kevin Pimbblet, said the discovery is significant."We've been looking for this ordinary matter for a couple of decades," he said in a statement on Friday."It's been published in one of the most prestigious journals in the world, so astronomers all over the world will be able to read this article."Scientists had thought the matter would have a temperature of about 1 million degrees Celsius, 1.8 million degrees Fahrenheit, and should therefore be observable at X-ray wavelengths.Amelia Fraser-McKelvie's discovery has proved that prediction is correct, Pimbblet said.The trio published a research paper on the missing mass in one of the world's oldest and most prestigious scientific journals, Monthly Notices of the Royal Astronomical Society.He said the discovery could change the way telescopes are built.

BEIJING, Feb. 8 (Xinhua) -- Forty people died in more than 118,000 cases of fire reported across China from February 2 to February 8, as Chinese revelers celebrated the Lunar New Year holiday with fireworks, according to a statement released Tuesday by the country's Ministry of Public Security.The number of cases jumped from the 7,480 fires reported during last year's Spring Festival holiday, which caused losses worth 28.5 million yuan. The incidents also injured 37 people and caused more than 56 million yuan (8.5 million U.S. dollars) in damages, which is almost double the figure from last year.However, this year's losses did not include a case in northeastern Liaoning Province where a five-star hotel in the city of Shenyang was set ablaze by fireworks on February 3.The fire, which caused no casualties, is possibly the country's largest fireworks accident during this year's Spring Festival celebrations.According to the statement, some 260,000 police and fire fighters across the country were mobilized for 24,800 fire control missions.The personnel rescued more than 1,600 people and evacuated tens of thousands. Fire departments have been strengthening monitoring of high-rise buildings, shopping malls, markets, construction sites and other crowded or vulnerable locations.Also, a total of 173 companies were suspended from operating for failing to meet fire prevention and control standards, according to the ministry.

BEIJING, Feb. 15 (Xinhua) -- A senior Chinese mainland official has said the government will work with Taiwan to enhance cross-Strait economic exchanges and cooperation.The mainland would this year focus on fulfilling the cross-Strait Economic Cooperation Framework Agreement (ECFA) and conducting follow-up negotiations on the pact, which took effect in September last year, Xu Mang, director of the economy bureau of the Taiwan Affairs Office of the State Council, told Xinhua in an interview.Top of the follow-up agenda was cross-Strait investment protection. The mainland hoped to reach a mutually beneficial agreement on the issue with Taiwan at an early date, with concerns of both sides respected, Xu said.Xu said the two sides should adhere to the principle of balance in negotiations, aiming for effective protection, fewer restrictions and more convenience for cross-Strait investment.Mainland and Taiwan negotiators agreed in December last year to continue discussing the investment protection agreement at the seventh round of talks scheduled for this year.The mainland would also continue this year to encourage investment in Taiwan, address Taiwan enterprises' concerns over economic transformation and development, and promote cross-Strait cooperation in finance, modern services and agriculture, Xu said.The first step in implementing the ECFA, the "early harvest program," took effect on Jan. 1, when the mainland reduced tariffs on 539 Taiwanese items, or 16 percent of imports from Taiwan, while Taiwan cut duties on 267 mainland items, 10 percent of imports from the mainland.Within two years, the duties on those products will be reduced to zero.Xu said the implementation of the early harvest program would boost trade links across the Strait.As the products receiving tariff reductions covered industries including agriculture, petrochemicals, machinery, textiles and transport, Taiwan businesses on the mainland would benefit from lower purchase costs on Taiwan raw materials, Xu said.Taiwan's small and medium-sized enterprises and low-income groups would especially benefit from the tariff reductions on exports of 18 agricultural products to the mainland, Xu said.Statistics from Taiwan showed that driven by the tariff reduction, the island's small and medium-sized enterprise export trade volume to the mainland would increase to 18 billion U.S. dollars per year."The tariff reduction policy will benefit more Taiwan compatriots," Xu said.Cross-Strait trade volume totaled 145.37 billion U.S. dollars last year, a rise of 36.9 percent year on year. The figure included 115.69 billion U.S. dollars of Taiwan exports to the mainland, up 20.2 percent. 

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