中卫面体检应检查什么(阿拉尔老年人体检) (今日更新中)

WASHINGTON, Nov. 8 (Xinhua) -- Children with autism have more brain cells and heavier brains compared to typically developing children, according to a study to be published on Wednesday in the Journal of the American Medical Association.The small, preliminary study provides direct evidence for possible prenatal causes of autism.The prefrontal cortex is involved in various higher order functions such as language and communication, social behavior, mood, and attention. Children who have autism tend to show deficits in such functions.Eric Courchesne, of the University of San Diego School of Medicine Autism Center of Excellence, and colleagues conducted direct counts of brain cells in specific regions of the prefrontal cortex in postmortem brains of seven boys who had autism and six typically developing males, ranging in age from 2-16 years. Most participants had died in accidents, but the researchers did not base their selection on causes of death.The researchers found that children with autism had 67 percent more neurons in the prefrontal cortex and heavier brains for their age compared to typically developing children. Since these neurons are produced before birth, the study's findings suggest that faulty prenatal cell birth or maintenance may be involved in the development of autism. Another possible factor that may contribute to the neuronal excess is a reduction in apoptosis, or programmed cell death, which normally occurs during the third trimester and early postnatal life.Though small, this preliminary study examined all relevant postmortem tissue available at the time. The relative scarcity of tissue from very young children may limit future research as well, but efforts to include a larger number of samples are needed to confirm these findings and to identify patterns of age-related changes in autism, the researchers say."Earlier studies of head circumference and early brain overgrowth have pointed us in this direction, but there have been few quantitative neuroanatomical studies due to the lack of postmortem tissue from children with autism," said Thomas Insel, director of the National Institute of Mental Health, in a statement. "These new results, along with an earlier study reporting altered wiring of the prefrontal cortex, focus our attention on this critical area of the brain in autism."

BEIJING, Jan. 10 (Xinhuanet) -- Conflicts among hundreds of scalpers raring to stock up on the new iPhone 4S are casting a shadow over the gadget's launch on the Chinese mainland on Friday.Over the weekend, scalpers from two groups bickered and shoved each other when standing in line to purchase iPhone 4 at Apple's Sanlitun store, said witnesses.Workers from two Apple stores in Beijing told China Daily the stores have not started online bookings for the iPhone 4S so far."More than 1,000 of us have gathered to buy all the available iPhone 4 this morning," said a scalper hawking the phone outside the Sanlitun store on Sunday."We'll come again on Friday for iPhone 4S. You'll have no hope of getting an iPhone 4 or 4S from the store, but only from us."The scalpers are asking 4,450 yuan (705 U.S. dollars) for an 8-gigabyte iPhone 4, and 5,450 yuan for a smuggled iPhone 4S. Apple sells an 8-gigabyte iPhone 4 on the mainland for 3,988 yuan.An Apple employee at the Sanlitun store who declined to give her name told China Daily on Monday that the store was aware the scalpers may be planning to besiege the iPhone 4S launch, and the store has prepared for that.Calls to the public relations office of Apple China went straight to voice mail.Police of the Sanlitun police station refused China Daily's interview request.An officer of the property management company of the Sanlitun Village shopping mall, where the store is located, said on Sunday they had not been informed about the weekend fracas outside of the Apple store.But on Monday afternoon, staff members of the company dispersed the scalpers by sealing off part of the store's entrance.Workers at the Sanlitun store and property management staff confirmed two groups of scalpers fought on Saturday afternoon and Sunday when jumping the line or stopping each other to pay to get an iPhone 4.Since October 2010, Apple has ceased direct sales of iPhone 4 at its retail outlets in Beijing and Shanghai and is only accepting online orders or reservations and schedules pick-up at stores to curb rampant scalping.But the registration system for reserve and pick-up has become "momentarily unavailable because of heavy traffic volume" in recent days, said Apple's website.A scalper in his 30s outside the Sanlitun store boasted they had "hacked" Apple's reservation page. He described himself an "unofficial salesman" of Apple.Defending the actions of scalpers that lead to consumers having to pay more, he said "it's not our fault but Apple's, because they put too few products in the mainland market."This is not the first time scalpers have targeted Apple products.Two men and two women suffered minor injuries outside the Sanlitun store during a clash between a worker and angry customers as Apple fans waited to buy iPhone 4 and the newly released iPad 2 in May 2011.According to reports, the incident started when a worker confronted an alleged scalper for jumping the line. This led to a verbal conflict in which the alleged scalper was thrown against the corner of an outside wall, causing injuries to his face and wrist

WASHINGTON, Nov. 8 (Xinhua) -- Children with autism have more brain cells and heavier brains compared to typically developing children, according to a study to be published on Wednesday in the Journal of the American Medical Association.The small, preliminary study provides direct evidence for possible prenatal causes of autism.The prefrontal cortex is involved in various higher order functions such as language and communication, social behavior, mood, and attention. Children who have autism tend to show deficits in such functions.Eric Courchesne, of the University of San Diego School of Medicine Autism Center of Excellence, and colleagues conducted direct counts of brain cells in specific regions of the prefrontal cortex in postmortem brains of seven boys who had autism and six typically developing males, ranging in age from 2-16 years. Most participants had died in accidents, but the researchers did not base their selection on causes of death.The researchers found that children with autism had 67 percent more neurons in the prefrontal cortex and heavier brains for their age compared to typically developing children. Since these neurons are produced before birth, the study's findings suggest that faulty prenatal cell birth or maintenance may be involved in the development of autism. Another possible factor that may contribute to the neuronal excess is a reduction in apoptosis, or programmed cell death, which normally occurs during the third trimester and early postnatal life.Though small, this preliminary study examined all relevant postmortem tissue available at the time. The relative scarcity of tissue from very young children may limit future research as well, but efforts to include a larger number of samples are needed to confirm these findings and to identify patterns of age-related changes in autism, the researchers say."Earlier studies of head circumference and early brain overgrowth have pointed us in this direction, but there have been few quantitative neuroanatomical studies due to the lack of postmortem tissue from children with autism," said Thomas Insel, director of the National Institute of Mental Health, in a statement. "These new results, along with an earlier study reporting altered wiring of the prefrontal cortex, focus our attention on this critical area of the brain in autism."

TEHRAN, Oct. 9 (Xinhua) -- Iran is going to launch domestically- built Navid satellite by Safir satellite launcher by the end of March 2012, the semi-official Mehr news agency reported on Sunday.Navid (promise) is a research satellite and is currently undergoing pre-launch tests, said the report without further details.In June, Iran put the Rasad (surveillance) satellite in the orbit to render images to the country.Iran put a satellite into orbit in 2009 and sent some small animals into space in 2010. It plans to send man into space by 2020.

BEIJING, Nov. 30 (Xinhua) -- China's efforts to fight AIDS are impressive and its experience can be shared, according to Michel Sidibe, executive director of the Joint United Nations Programme on HIV/AIDS (UNAIDS)."We have seen progress in terms of new infections. The number of people going into treatment is increasing and the mortality rate is going down very quickly in China," Sidibe said during an interview with Xinhua on Wednesday.Sidibe said he was impressed by the country's political leadership and commitment to controlling AIDS.According to UNAIDS, the country has reported a 60-percent reduction in deaths due to AIDS over the past eight years.New HIV infection cases in China have been reduced from 70,000 people annually in 2005 to around 48,000 in 2011, according to the country's health department."However, China's success will not only be measured by what it has done for the Chinese people," Sidibe said.China has successful experience in reducing new HIV infections among intravenous drug users, which can be shared with the rest of the world, particularly east Europe and south Asia where HIV infections among drug abusers is a major challenge, he said.Sidibe suggested that the country should work with the rest of the developing world, particularly Africa, in fighting AIDS.A partnership between China and Africa will make a "big, big difference" in reducing AIDS mortality rates and introducing new technology and perspectives in Africa, said the official who had worked for UN in several African countries for more than two decades.Admitting the challenges of funding AIDS control programs during the current global economic downturn, Sidibe called for global solidarity and increasing shared responsibilities among countries."It is a critical moment now. It is not a time to stop investment but to redouble our efforts, to make sure that we will continue to make progress in the fight against HIV," Sidibe said."Getting to Zero" has been chosen as the main theme of World AIDS Day for the next five years, referring to UNAIDS' vision of "zero new HIV infections, zero discrimination and zero AIDS-related deaths."Sidibe met with Li Congjun, president of the Xinhua News Agency, on Wednesday before the interview. The agency has launched a global media campaign in cooperation with UNAIDS to raise public awareness about HIV/AIDS."The partnership (with Xinhua) is not only about writing news about HIV. It is about helping people to change their attitude and make decisions to help protect themselves," Sidibe said.

来源：资阳报