濮阳东方妇科医院咨询预约(濮阳市东方医院专不专业) (今日更新中)

BEIJING, Nov. 30 (Xinhuanet) -- Heading football frequently may cause brain damage leading to subtle but serious declines in thinking and coordination skills, a new study suggested as quoted by media reports Wednesday.Researchers used an advanced MRI (Magnetic Resonance Imaging) technique to analyze changes in brain white matter of 32 adult amateur soccer players who head balls 436 times a year on average.The study found players who head football quite frequently -- with 1,000 or more a year -- showed abnormalities similar to traumatic brain injuries suffered in car accidents."This is the first study to look at the effects of heading on the brain using sophisticated diffusion tensor imaging," said Dr. Michael Lipton, a leading researcher and associate director of the Gruss Magnetic Resonance Research Center at the Albert Einstein College of Medicine in New York City."We found the real implication for players isn't from hitting headers once in a while, but repetitively, which can lead to degeneration of brain cells," he added.The researchers compared neurological images of study participants, whose average age was 31, and found those with the highest volume of headers had abnormalities in five areas of the brain, responsible for attention, memory, physical mobility and high-level visual functions.The findings come in the wake of mixed reports on the so-called "cognitive" consequences of frequently heading soccer balls at practice.Dr. Chris Koutures, a pediatrician and sports medicine specialist in Anaheim Hills, California, said the retrospective imaging study was fascinating, but needs more data to effectively determine safe header limits, especially for younger players.Dr. Lipton agreed neuropsychological damage from headers would be hard for a coach or physician to notice since cognitive problems develop gradually, and even players might not be aware of mild memory loss."We can't tell an individual today not to be heading a ball, but caution is a good thing," Lipton said. "We need more research for definitive answers and we have the advanced imaging tools to do it."

XI'AN, Nov. 20 (Xinhua) -- Fish in Hongjiannao Lake, China's largest desert freshwater lake, are teetering on the verge of extinction, according to local fishery authorities."The fish in Hongjiannao have nearly vanished," said Li Weiping, the head of a fish monitoring station in northwest China's Shaanxi province.As the lake continues to shrink, its water has become more salty and its pH reading has reached 9.6, while the maximum reading suitable for fish is 8.5, according to Li.The lake has gradually lost the water that it used to get from underground streams and rivers, Li said, adding that excessive coal mining around the lake has changed the way water flows underground. Two reservoirs have been built on two rivers near the upper reaches of the lake, preventing river water from flowing into the lake.The lake's water level has plunged by 20 to 30 centimeters every year. Its total surface area has been reduced to 41.8 square km, down from 67 km in 1996.

BEIJING, Dec. 20 (Xinhua) -- A senior Chinese official called for a higher level of requirements for promoting cultural and ethical progress at a national conference Tuesday.Li Changchun, a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee urged for efforts to "provide firm ideological assurance, powerful spiritual drive, effective media support and sound cultural conditions for achieving the great goal of building an overall prosperous society."Li, also director of the Central Spiritual Civilization Development Steering Commission, made the remark while addressing the National Award-issuing Conference on the Work of Cultural and Ethical Progress.Li Changchun (1st L), a Standing Committee member of the Political Bureau of the Communist Party of China (CPC) Central Committee and director of the Central Spiritual Civilization Development Steering Commission, presents the awards to the advanced collectives and individuals during the National Award-issuing Conference on the Work of Cultural and Ethical Progress held in Beijing, capital of China, Dec. 20, 2011. Li attended the conference on Tuesday and gave a speech.In his speech, Li extended his gratefulness to everyone engaged in cultural and ethical work at all levels, as well as to people from all walks of life for their active participation in, and support of, the work.Currently, publicizing the Party's new plenary session should be the primary task in cultural and ethical work, Li said."Cultural and ethical progress is a major component of the socialist cause with China's own characteristics," he said, emphasizing that substantial efforts must be made to strengthen Party leadership on the work.The meeting was presided over by Liu Yunshan, a member of the Political Bureau of the CPC Central Committee and deputy-director of the Central Spiritual Civilization Development Steering Commission.In an address at the gathering, he called for greater efforts in publicizing the models of cultural and ethical progress, so as to "enhance the level of civilization of the society as a whole."A total of 27 cities and municipal districts, 899 villages and small towns, and 1,794 institutions and enterprises were awarded for their marked achievements in cultural and ethical progress, and 23 cities and municipal districts that had been previously awarded were allowed to keep their honorary titles.

BEIJING, Oct. 20 (Xinhuanet) -- British scientists used bacteria and DNA to build basic components for digital devices in a new research, according to media reports, suggesting biological computers come closer to reality.Digital devices are based on logic gates, fundamental building blocks in silicon circuitry, said Professor Richard Kitney, leading researcher of the research published in the journal Nature Communications, "Without them, we could not process digital information."According to Science Daily, Professor Kitney and his colleagues from the Imperial College London replicated the building blocks using bacteria and DNA, forming biological logic gates, which paved the way for building more complex biological processors in the future.The researchers hoped biological computers can be applied to monitoring human health in the future.They believed that small biological processors, inserted in human bodies, could roam inside the bodies, monitor the health, and correct any problems they found.These biological logic gates are the most advanced created by scientists. But there is still a long way to go to apply them in reality, said Professor Kitney.

WASHINGTON, Dec. 16 (Xinhua) -- The U.S. International Trade Commission (USITC) Friday launched a probe into certain products from China after several U.S. companies alleged their patents were infringed.The products in question include televisions and Blu-ray players produced by Haier Group of China and Vizio Inc. under Taiwan-based Amtran Technology Company and sold in the U.S. market, the USITC said.` Five U.S. technology companies filed a complaint with USITC last month, saying those products violated Section 337 of the Tariff Act of 1930 by infringing their patents.Meanwhile, they requested the USITC issue an exclusion order and a cease and desist order against those products from China.The trade panel is scheduled to set a target date for completing the investigation within 45 days after institution of the probe. If the complaint is approved, the agency will ban importation of those products.The U.S. move came at a time when protectionism is making a comeback in the United States amid sluggish economic recovery.It is widely believed that such actions would only hurt U.S.- China trade relations that are increasingly critical to global economic recovery.

来源：资阳报