徐州四维彩超时间段(徐州怀孕1个月孕酮正常值是多少) (今日更新中)

WASHINGTON, April 29 (Xinhua) -- A U.S. appeals court ruled on Friday that the Obama administration can continue the taxpayer- funding for human embryonic stem cell research.The U.S. Court of Appeals in Washington overturned a preliminary federal court order that would have blocked the U.S. Health and Human Services Department and the National Institutes of Health (NIH) from spending government money on embryonic stem cells research."Today's ruling is a victory for our scientists and patients around the world who stand to benefit from the groundbreaking medical research they're pursuing," said Nicholas Papas, a White House spokesman.U.S. President Barack Obama has been trying to expand government funding for human embryonic stem cells research, saying that years of progress on finding cures for spinal cord injuries, Parkinson's disease and other diseases would be lost without the government support on this field.Opponents have been arguing the research is unacceptable because embryonic stem cells can only be obtained through destroying human embryos.Last August, a federal judge ruled that the government-backed embryonic stem cell research violated the law because embryos were destroyed in the process and it jeopardized the position of researchers using adult stem cells for winning federal grants.The government immediately appealed to the ruling, and the appeals court said the research could continue at the NIH before the judge ruled on the case.

BEIJING, Jan. 26 (Xinhua) -- There is some part of China that could use additional water -- the drought-hit north, even while the central government is grappling to soak up excess liquidity to contain price hikes.The dry spell has continued for months in the grain production regions in northern China, setting off concerns that it might threaten China's grain output and thus cause food price hikes, a major contributor of the country's inflation in recent months.The bad weather came and may aggravate China's battle on price hikes, including higher interest rates and reserve ratios. The government also introduced price caps and promised increases in supplies to stabilize prices.Meteorological and agricultural experts said it is still too soon to predict a decline in grain output. However, they worried that if the drought continues into the spring, grain output will fall and push up food prices.DRY SPELLWater shortages have been gripping nine provinces since October last year, including the six major wheat producing regions in China -- Shanxi, Shandong, Hebei, Henan, Anhui and Jiangsu -- which contribute more than 80 percent of the country's total wheat output.Further, rainfall in the six provinces averaged only 40.2 millimeters since October last year, down 53 percent compared with previous years, according to the National Climate Center.As of Monday, 60.39 million mu (4.02 million hectares) of crops throughout the nation were plagued by drought, according to the latest statistics from the Office of State Flood Control and Drought Relief Headquarters."There have been no rains for four months. It has been too long," said Song Qingguo, a farmer at the Xitiegang village of Qixian County in Henan, where winter wheat output accounts for almost one-fourth of the country's total."Wheat output will probably drop if such a situation continues," he worried.At present, some 15.86 million mu of wheat is exposed to drought, according to Yang Biantong, an official with Henan's water authorities.Another key wheat growing province of Shandong is facing its worst drought in 60 years, local authorities said. About 2 million hectares of land used for growing wheat, or 56 percent of the wheat-planting areas in the province, have been hit by drought, and the area is expanding, the Shandong provincial flood control and drought relief headquarters said.H Scientists say it is a result of the La Nina effect that is also responsible for the harsh winter gripping large parts of China's south, which also affected production and transportation of vegetables and other food.The Ministry of Commerce said Tuesday that Chinese farm produce prices rose for a fourth consecutive week, through Jan. 23, with the wholesale prices of 18 staple vegetables growing 12.6 percent week on week. One reason for the price hike was the freezing weather in the south, it said."The current drought in China is the second worst during the same period of time since 1961 because of the adverse weather", said Zhang Peiqun, director with the weather forecast department of the National Climate Center.The bad weather will persist in the following period of time, which means the drought in the north and the cold snap in the south will continue, Zhang said.The China Meteorological Administration forecast on Wednesday that parts of Hubei, Hunan, Anhui and Zhejiang provinces will have heavy snow or snowstorms in the coming three days. Also, icy rain will slash parts of Guizhou and Yunnan provinces.

RIO DE JANEIRO, March 25 (Xinhua) -- The number of dengue fever cases in Rio de Janeiro city this year has already surpassed 10,000, local health authorities said on Friday.According to the city's Health Secretariat, in less than three months, the number of confirmed dengue fever cases in Rio reached 10,158, exceeding the figures registered in the entire years of 2009 (2,723) and 2010 (3,120).In Rio de Janeiro state, the number of confirmed dengue fever cases reached 20,150, and the death toll rose to 18.This week, the first two cases of type-4 dengue fever in Rio de Janeiro state were confirmed in the city of Niteroi. The type-4 dengue fever is not more dangerous than the other types, but as the disease had not been registered in the region before, the local population has no immunity to it.As there are four different types of dengue fever, a person can develop the disease several times.The last epidemic of dengue fever in Rio de Janeiro state occurred in 2008 when 174 people died of the disease and some 250,000 cases of dengue were registered.

LOS ANGELES, April 1 (Xinhua) -- A NASA Gulfstream-III aircraft equipped with a synthetic aperture radar is scheduled to depart Sunday, April 3 on a nine-day mission to image Hawaii volcanoes, the Jet Propulsion Laboratory (JPL) announced on Friday.The aircraft will fly from the Dryden Aircraft Operations Facility in Palmdale, California to the Big Island of Hawaii to study the Kilauea volcano that recently erupted, said JPL in Pasadena, Los Angeles.The mission will help scientists better understand processes occurring under Earth's surface, JPL said.Developed by JPL, the Uninhabited Aerial Vehicle Synthetic Aperture Radar, or UAVSAR, uses a technique called interferometric synthetic aperture radar that sends pulses of microwave energy from the aircraft to the ground to detect and measure very subtle deformations in Earth's surface, such as those caused by earthquakes, volcanoes, landslides and glacier movements.As the Gulfstream-III flies at an altitude of about 12,500 meters, the radar, located in a pod under the aircraft's belly, will collect data over Kilauea, according to JPL.The UAVSAR's first data acquisitions over this volcanic region took place in January 2010, when the radar flew over the volcano daily for a week. The UAVSAR detected deflation of Kilauea's caldera over one day, part of a series of deflation-inflation events observed at Kilauea as magma is pumped into the volcano's east rift zone.This month's flights will repeat the 2010 flight paths to an accuracy of within 5 meters, or about 16.5 feet, assisted by a Platform Precision Autopilot designed by engineers at NASA's Dryden Flight Research Center on Edwards Air Force Base, California, JPL said.By comparing these camera-like images, interferograms are formed that reveal changes in Earth's surface, said JPL.Between March 5 and 11, 2011, a spectacular fissure eruption occurred along the east rift zone. Satellite radar imagery captured the progression of this volcanic event."The April 2011 UAVSAR flights will capture the March 2011 fissure eruption surface displacements at high resolution and from multiple viewing directions, giving us an improved resolution of the magma injected into the east rift zone that caused the eruption," said JPL research scientist Paul Lundgren."Our goal is to be able to deploy the UAVSAR on short notice to better understand and aid in responding to hazards from Kilauea and other volcanoes in the Pacific region covered by this study," Lundgren added.

BEIJING, April 12 (Xinhuanet) -- The elderly have a difficult time with multi-tasking as a study suggests that older brains behave differently when it comes to switching between two tasks, according to media reports on Tuesday.Researchers used functional magnetic resonance imaging (FMRI) to analyze brain activity in 20 people over age 60 by asking them to contemplate outdoor photos shown briefly. Then the elderly were presented with the picture of a face and asked to determine its gender and age, before being asked to recall details from the original scene they viewed.Researchers then compared their results to a similar experiment with 20 younger adults and found the brains of older subjects were less capable of disengaging from the interruption and reestablishing the neural connections necessary to switch back to focusing on the original memory."Unlike younger individuals, older adults failed to both disengage from the interruption and re-establish functional connections associated with the disrupted memory network," write Wesley C. Clapp of the University of California, San Francisco, and colleagues in the Proceedings of the National Academy of Sciences.The study, published in the online edition of the journal Proceedings of the National Academy of Sciences, sheds new lights into a growing body of studies showing that one's ability to move from one task to another in quick succession becomes more difficult with age.

来源：资阳报