喀什月经不调量少是什么原因(喀什精液检查医院医院) (今日更新中)

LOS ANGELES, April 12 (Xinhua) -- With the help of NASA Telescopes, astronomers have uncovered one of the youngest galaxies in the distant universe, with stars that formed 13.5 billion years ago, the Jet Propulsion Laboratory (JPL) announced on Tuesday.The finding addresses questions about when the first galaxies arose, and how the early universe evolved, JPL noted in a press release.Infrared data from both the Hubble Space Telescope and the post- coolant, or "warm," phase of NASA's Spitzer Space Telescope mission revealed that the galaxy's stars are quite mature, which means they must have formed when the universe was just a toddler, said JPL in Pasadena, Los Angeles.This challenges theories of how soon galaxies formed in the first years of the universe and could even help solve the mystery of how the hydrogen fog that filled the early universe was cleared, according to astronomers involved in the study.This galaxy is not the most distant ever observed, but it is one of the youngest to be observed with such clarity, JPL said.Normally, galaxies like this one are extremely faint and difficult to study, but, in this case, nature has provided the astronomers with a cosmic magnifying glass, JPL said.The galaxy's image is being magnified by the gravity of a massive cluster of galaxies parked in front of it, making it appear 11 times brighter. This phenomenon is called gravitational lensing."Without this big lens in space, we could not study galaxies this faint with currently available observing facilities," said Eiichi Egami of the University of Arizona in Tucson. "Thanks to nature, we have this great opportunity to see our universe as it was eons ago."The findings may help explain how the early universe became " reionized," according to JPL."Seeing a galaxy as it appeared near the beginning of the universe is an awe-inspiring feat enabled by innovative technology and the fortuitous effect of gravitational lensing," Jon Morse, NASA's Astrophysics Division director at the agency's headquarters in Washington, said in the release."Observations like this open a window across space and time, but more importantly, they inspire future work to one day peer at the stars that lit up the universe following the big bang."

BEIJING, March 19 (Xinhua) -- In spite of the fact that snow still covers his farmland, Jiang Chen has been busy stocking fertilizers and seeds to prepare for the coming spring farming season."I am almost ready for the sowing," said Jiang, a 64-year-old peasant who farms five hectares of cropland in Liujia Township in Yushu City, northeast China's Jilin Province. "But the costs are rising so I still want to look for better seeds providing a higher yield this year."As the Chinese government continued policies to assure a good grain harvest this year, millions of farmers like Jiang in China's major grain-producing regions such as Jilin, Heilongjiang, Shandong and Henan provinces are now gearing up to finalize preparations for the coming sowing season.The central government's incentives in 2011 include increases in minimum rice purchase prices by 9.7 percent to 21.9 percent from last year, as well as 24.9 billion yuan (about 3.77 billion U.S. dollars) in subsidies to the national grain risk fund for farmers."Though farmers are richer now than before, our economic strength remains relatively weak as compared with urban residents," Jiang said.He noted that he was considering investing less this year because the cost of agricultural production has increased year after year.The average urea price from manufacturers and retailers rose about 10 percent from last year to about 1,980 yuan and 2,100 yuan per tonne at a grain and oil wholesale market near Yuquan Road in Beijing, where many farmers from neighboring Hebei, Henan and Shandong provinces buy agricultural fertilizers and additives.Urea is the primary fertilizer used by Chinese grain growers, though many of the farmers said that they would reduce the use the compound in their fields due to rising prices and the impact on wheat caused by the widespread drought in north China this winter.Wang Quan, the president of China National Agricultural Means of Production Group Corp., the country's largest supplier of agricultural materials, predicted that the use of urea during the spring farming season would be between 20 million tonnes to 25 million tonnes, which is about two fifths of the year's total.Wang said that the urea price is around 400 U.S. dollars per tonne in global markets, or 15.7 percent higher than the domestic price."I think it takes time for Chinese farmers to accept the price hikes gradually," he added.Analysts say that the different perceptions on urea prices between manufacturers and farmers may have affected China's crops because the reduced use of fertilizers usually mean less grain output in the country since many farmers depend more on fertilizers, rather than technology to boost production.China's grain output rose 2.9 percent last year to 546.41 million tonnes, marking the seventh consecutive year of growth. The country aims to keep its 2011 grain production over 500 million tonnes, according to an executive meeting of the State Council, or the Cabinet, Thursday.Chinese Premier Wen Jiabao said last month that rising costs of grain production, the lingering drought in north China's major wheat-growing regions and the weakening of agricultural production in some areas would directly affect China's summer grain output.Facing challenges such as higher costs for growing grain, Jiang believed that he could generate higher income from his crops this year with the support of the agricultural sector by the government."If the grain prices also rise this year, I can still earn a net income of 10,000 yuan for every hectare of farmland," Jiang said."I hope to keep my farmland from being seized for industrial or residential development," he added.

The severe water shortages have become a major bottleneck to our sustainable development. Nearly two-thirds of the cities in China lack water," said Chen Lei, Minister of Water Resources.From 2011 to 2015, China will strive to limit its annual water consumption within 620 billion cubic meters and cut water consumption per 10,000 yuan of GDP by 30 percent.

LOS ANGELES, April 10 (Xinhua) -- Drinking green tea and practicing Taichi may promote bone health of postmenopausal women and reduce the risk of inflammation, a new study suggests.The study, conducted by researchers at the Laura W. Bush Institute for Women's Health at the Texas Tech University Health Sciences Center, focused on postmenopausal women and investigated the potential for green tea to work synergistically with Taichi in enhancing bone strength of postmenopausal women.Originating as a martial art in China, Taichi is a mind-body exercise that utilizes slow, gentle movements to build strength and flexibility, as well as deep breathing and relaxation, to move qi, or vital energy, throughout the body.The study findings were published Sunday at EurekAlert.org, the website of the American Association for the Advancement of Science (AAAS).Carried out as a double-blind, placebo-controlled, intervention trial (the "holy grail" of scientific studies), this experiment involved 171 postmenopausal women with the average age of 57 who had weak bones but not full-fledged osteoporosis. Subjects were divided into 4 groups -- placebo: starch pill (placebo) and no Taichi; GTP or green tea polyphenols (500 mg/day) and no Taichi; Placebo plus Taichi (starch pill and practising Taichi three times a week); and GTP plus Taichi.The study lasted for 6 months, during which blood and urine samples were collected and muscle strength assessed.The results show that consumption of GTP (at a level equivalent to about four-six cups of steeped green tea daily) and participation in Taichi independently enhanced markers of bone health by three and six months, respectively. A similar effect was found for muscle strength at the 6-month time point. Participants taking Taichi classes also reported significant beneficial effects in quality of life in terms of improving their emotional and mental health.Perhaps most remarkable, however, was the substantial effect that both GTP and Taichi had on biological markers of oxidative stress. Because oxidative stress is a main precursor to inflammation, this finding suggests that green tea and Taichi may help reduce the underlying etiology of not only osteoporosis, but other inflammatory diseases as well.In the study, the researchers developed an animal model (the ovariectomized, middle-aged female rat), with which they could effectively study the effects of green tea consumption on protection against breakdown of the bone's microarchitecture, according to the AAAS.In humans, this can lead to osteoporosis, a condition common to older women. The researchers say what they have learned from the animal models might also be applicable to postmenopausal women.There is a "favorable effect of modest green tea consumption on bone remodeling in this pre-osteoporotic population," said lead researcher Dr. Chwan-Li (Leslie) Shen, an associate professor at the institute.The researchers plan to soon complete a more long-term study utilizing more technically savvy measures of bone density, according to the AAAS.

来源：资阳报