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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.

ABU DHABI, Feb. 10 (Xinhua) -- China is willing to deepen friendship, broaden cooperation, and enhance coordination with the United Arab Emirates (UAE) in international and regional affairs, visiting Chinese Foreign Minister Yang Jiechi said Thursday.During a meeting with Abu Dhabi Crown Prince Sheikh Mohammed bin Zayed Al Nahyan, Yang said China and the UAE have witnessed in recent years rapid development in their bilateral ties, with closer high-level contacts, increasingly strengthened mutual political trust, fruitful cooperation in such areas as trade and economy, and broadened cultural exchanges.China has praised the UAE's support in Xinjiang-related and human rights issues, he added.For his part, Sheikh Mohammed said the UAE-China relations are currently at an important period of in-depth development and faced with good opportunities.The UAE attaches great importance to its relations with China and hopes to cement the traditional friendship between the two countries and develop pragmatic cooperation in various fields, he added.Sheikh Mohammed said the UAE expects that China will continue to play a positive role in international and regional affairs.Earlier in the day, Yang also met with his UAE counterpart Sheikh Abdullah bin Zayed Al Nahyan. Both sides reached broad consensus after exchanging views on bilateral ties and regional issues of common concern.The Chinese foreign minister arrived in the UAE capital of Abu Dhabi late Wednesday for an official visit to the Gulf nation.

BEIJING, April 10 (Xinhua) -- Many children in the U.S. live in poverty and their physical and mental health is not ensured as nearly one in four children struggles with hunger, according to a report on the U.S. human rights record released by China on Sunday.The Human Rights Record of the United States in 2010 was released by the Information Office of China's State Council in response to the country reports on Human Rights Practices for 2010 issued by the U.S. Department of State.The poverty rate increased for children younger than 18 to 20.7 percent in 2009, up 1.7 percentage points from that in 2008, the report quoted figures from the U.S. Census Bureau as saying.The report pointed out that violence against children is very severe in the country, citing figures from the official website of Love Our Children USA that every year over three million children are victims of violence reportedly and the actual number is three times greater.More than 93,000 children are currently incarcerated in the United States, and between 75 and 93 percent of children have experienced at least one traumatic experience, including sexual abuse and neglect, the report said.According to the report, pornographic content is rampant on the Internet and severely harms American children as seven in 10 children have accidentally accessed pornography on the Internet and one in three has done so intentionally.

LOS ANGELES, March 23 (Xinhua) -- People who are more physically active are less likely to have high blood pressure associated with a high-sodium diet, a new study suggests.The study was conducted by researchers at the Tulane University School of Public Health and Tropical Medicine in New Orleans, HealthDay News reported on Wednesday.Study findings were presented at the on-going American Heart Association's meeting on nutrition, physical activity and cardiovascular disease, held in Atlanta, said the report.To explore a potential association between exercise and the hypertensive role of dietary salt, the researchers focused on roughly 1,900 men and women (average age 38) living in a rural region in northern China. None took blood pressure medication during the study, according to the report.For one week all of the participants consumed 3,000 mg of sodium a day in their diet; for another week, they were placed on a high-sodium diet -- 18,000 mg per day.Nine blood pressure readings were taken each week, and questionnaires were completed to assess routine levels of physical activity, ranging from "very active" to "quite sedentary."When switching from the lower-sodium to a high-sodium diet, those who experienced a 5 percent or greater boost in their systolic blood pressure (the heart contraction measure represented by the top figure of a blood pressure reading) were deemed "high salt-sensitive."Those reporting the most physical activity had a 38 percent lower risk of being highly salt-sensitive than the least active group. This group was the least likely to see a 5 percent or greater rise in their blood pressure in response to a high-salt diet.Compared with the most sedentary group, those in the next-to- highest activity group had a 17 percent lower risk of salt- sensitivity, and those in the next-to-lowest activity group had a 10 percent lower risk.The team concluded that engaging in physical activity has a " significant," independent and progressively healthful impact on the degree to which salt sensitivity relates to blood pressure."For those with low physical activity, their blood pressure will increase more if they increase their sodium intake," study co- author Dr. Jiang He, chair of the department of epidemiology at the school, said in remarks published by HeathDay News."It's a little bit of a surprise," He added. "But this is the first study to look at this particular association between physical activity and salt sensitivity and blood pressure. But after thinking it over it makes sense, because we already know that physical activity will reduce blood pressure."High blood pressure, or hypertension, is a leading cause of stroke. Because of salt's association with high blood pressure, the American Heart Association recommends consuming less than 1, 500 mg of sodium per day.

CHICAGO, Jan. 21 (Xinhua) -- Chinese President Hu Jintao, on a trip to the United States, Friday visited an exhibition of companies operating in the U.S. Midwest.Most companies present at the exhibition, which was held in Chicago's suburban city of Woodridge, are Chinese-funded ones.During the visit, Hu encouraged Chinese companies operating in the United States to play a bigger role in promoting economic and trade cooperation between the two countries.Chinese President Hu Jintao visits an exhibition of companies operating in the U.S. Midwest, in Chicago, the United States, Jan. 21, 2011. Most companies present at the exhibition are Chinese-funded ones.The success of Chinese companies in the United States is a specific example of the China-U.S. mutually beneficial cooperation, he added.The operation of these companies not only yields profits for themselves, but adds momentum to economic development in the U.S. Midwest.Hu flew to Chicago after finishing a visit to Washington Thursday afternoon.He will wrap up his four-day state visit to the United States later Friday.