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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.

CANBERRA, April 14 (Xinhua) -- Scientists on Thursday expressed disappointment to the decision to cancel the long-running Australian Science Festival in Canberra.The festival has been operating during August for the past 19 years with free and ticketed science education activities.However, the festival organizers on Wednesday announced to halt this year's program after failing to secure support from the Australian Capital Territory state government in time to arrange events.According to Australian Science Communicators president, Jesse Shore, thousands of school children have attended the festival over its history to learn more about science as a career."It's encouraged other activities to join it, it was very important in getting National Science Week started, and that's stimulated a lot of other science communication activities," he told ABC News on Thursday.Shore said the decision to close it down is unfortunate as the event has been very influential and instrumental promoting science communications activities.He said he hopes that a number of people would gather together in a new partnership, with new ideas and hopefully a new funding base.

WASHINGTON, May 25 (Xinhua) -- The number of young adults in the United States with high blood pressure may be much higher than previously reported, according to a new study by researchers at the University of North Carolina (UNC) at Chapel Hill.Researchers analyzed data on more than 14,000 men and women between 24 and 32 years old in 2008 from the National Longitudinal Study of Adolescent Health, known as Add Health. They found 19 percent had elevated blood pressure, also referred to as hypertension. Only about half of the participants with elevated blood pressure had ever been told by a health-care provider that they had the condition."The findings are significant because they indicate that many young adults are at risk of developing heart disease, but are unaware that they have hypertension," said Quynh Nguyen, a doctoral student at UNC's Gillings School of Global Public Health and the study's lead author. Hypertension is a strong risk factor for stroke and coronary heart disease, the leading cause of death for adults in the United States.The findings were published this week in the journal Epidemiology.Kathleen Mullan Harris, Add Health's principal investigator and a co-author of the paper, said the findings were noteworthy because they were from the first nationally representative, field- based study of blood pressure to focus on young adults."The message is clear," said Harris. "Young adults and the medical professionals they visit shouldn't assume they're not old enough to have high blood pressure. This is a condition that leads to chronic illness, premature death and costly medical treatment."

BEIJING, March 17 (Xinhuanet) -- A new study has shown that gene therapy can reduce symptoms in patients with Parkinson's, media reports said Thursday.The study, published in the journal Lancet Neurology, is the first to show positive results in a test of gene therapy against a sham operation in 45 U.S. Parkinson's patients.The treated group showed a 23.1 percent improvement on a scale of Parkinson's symptoms six months after treatment, compared to a 12.7 percent improvement for patients who received sham surgery, according to the published research."Gene therapy is no longer just a theory," said Michael Kaplitt, a neurosurgeon at New York-Presbyterian Hospital and Weill Cornell Medical Center, and one of the study authors. "We are getting much closer to a reality where this treatment can be offered to patients."In patients with Parkinson's disease, their brains get overactive after losing the normal supply of a chemical called GABA. The new treatment, gene therapy, works by inserting billions of copies of a gene into patients' brains that helps them produce more GABA.Kaplitt said the results might spur similar treatments for other brain disorders like Alzheimer's, epilepsy and depression.

BAODING, Feb. 2, (Xinhua) -- All-out efforts should be made to combat drought for a summer grain harvest, said Chinese President Hu Jintao Wednesday in an inspection tour to north China's Hebei Province."We need to adopt comprehensive measures to ensure supply of capital, technologies, facilities and materials to enable winter wheat to safely grow through the winter," said Hu, when inspecting drought conditions at a wheat field in Xishanbei Township of Baoding City, Hebei.Over the past three months, North China has been hit by severe drought, seriously threatening normal agricultural production.Hu, who is also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, made the inspection visit in Baoding from Tuesday to Wednesday, to welcome the Spring Festival, or China's Lunar New Year, with local officials and residents.Hu beat a drum together with villagers during a new year celebration in Shijiatong Village, Xishanbei Township of Baoding.The president visited the home of Yan Deshu, an aged CPC member in the village, and pasted the Chinese character "Fu", meaning fortune and happiness, on the gate of Yan's yard.Hu also visited a long-distance coach station in Baoding, and extended Spring Festival greetings to passengers, station workers and volunteers.Hu inspected a unit of armed police in Baoding and made Chinese dumplings together with the officers and soldiers.

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