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WASHINGTON, July 15 (Xinhua) -- Researchers at Mount Sinai School of Medicine have found that grape seed polyphenols -- a natural antioxidant -- may help prevent the development or delay the progression of Alzheimer's disease.The research, led by Giulio Pasinetti, was published online Friday in the Journal of Alzheimer's Disease, which causes brain changes that gradually get worse.This is the first study to evaluate the ability of grape- derived polyphenols to prevent the generation of a specific form of amyloid (A) peptide, a substance in the brain long known to cause the neurotoxicity associated with Alzheimer's disease.In partnership with a team at the University of Minnesota, Pasinetti and collaborators administered grape seed polyphenolic extracts to mice genetically determined to develop memory deficits and A neurotoxins similar to those found in Alzheimer's disease. They found that the brain content of the A*56, a specific form of A previously implicated in the promotion of Alzheimer's disease memory loss, was substantially reduced after treatment.Previous studies suggest that increased consumption of grape- derived polyphenols, whose content, for example, is very high in red wine, may protect against cognitive decline in Alzheimer's. This new finding corroborates those theories."Since naturally occurring polyphenols are also generally commercially available as nutritional supplements and have negligible adverse events even after prolonged periods of treatment, this new finding holds significant promise as a preventive method or treatment, and is being tested in translational studies in Alzheimer's disease patients," said Pasinetti.In Alzheimer's disease, brain cells degenerate and die, causing a steady decline in memory and mental function.

WELLINGTON, Aug. 8 (Xinhua) -- A New Zealand study has found that people who work at least 50 hours a week can be up to three times more at risk of alcohol problems than people who work fewer hours.The study, conducted by the University of Otago, used data that followed more than 1,000 people born in Christchurch in 1977 through to age 30.Study leader Dr Sheree Gibb said it aimed to examine whether working hours were related to alcohol problems in early adulthood.Data from more than 1,000 participants at ages 25 and 30 showed a significant association between longer working hours and alcohol- related problems.Longer working hours were associated with higher levels of alcohol problems including frequent alcohol use and alcohol abuse or dependence.People who worked 50 hours or more on average a week were 1.8 to 3.3 times more likely to have alcohol-related problems than those who were not working, and about 1.2 to 1.5 times more likely to have alcohol-related problems than those who worked 30 to 49 hours a week.The higher risk of alcohol abuse for those who worked longer hours was evident in both men and women, according to the study.Gibb said the finding could suggest a need for consideration of policies and programs targeting individuals who worked long hours, with the aim of reducing rates of alcohol-related problems.The article had been accepted for publication by the UK-based journal Addiction.

SAN FRANCISCO, Sept. 12 (Xinhua) -- Amazon.com Inc. is talking with book publishers to launch a rental subscription service for digital books, U.S. media reported on Monday.Several publishing executives said they aren't enthusiastic about the idea because it could lower the value of books and it could also strain their relationships with other retailers that sell their books, The Wall Street Journal quotes people familiar with the matter in a report.The Seattle-based company is considering a digital book library featuring old titles, which would be available to Amazon Prime subscribers, who currently pay 79 U.S. dollars a year for access to digital library of movies and TV shows and unlimited two-day shipping, said the report.Amazon would offer book publishers a substantial fee and could limit the amount of books that Amazon Prime customers could read for free every month, the report cited some sources as saying.The online retailing giant makes the popular electronic reader Kindle and is also reported to launch a color touchscreen tablet before October to compete with Apple's iPad and other devices in the increasingly crowded tablet computer market.The proposal is another sign that retailers are looking for more ways to deliver content digitally as customers increasingly read book and watch TV on personal computers, tablets and other electronic devices, said The Wall Street Journal report.

SAN FRANCISCO, Aug. 2 (Xinhua) -- Social networking giant Facebook on Tuesday announced that it has bought Push Pop Press, a digital publishing company that develops the technology to help make interactive books optimized for iPad and other Apple devices."We're thrilled to confirm that we've acquired Push Pop Press, a startup whose groundbreaking software changes the way people publish and consume digital content," Facebook said in a statement.Push Pop Press was co-founded by Mike Matas and Kimon Tsinteris, both former Apple employees, and was known for teaming up with former U.S. vice president Al Gore to create a digital version of his book "Our Choice"."Although Facebook isn't planning to start publishing digital books, the ideas and technology behind Push Pop Press will be integrated with Facebook, giving people even richer ways to share their stories," Push Pop Press said in a statement posted on its website."With millions of people publishing to Facebook each day, we think it's going to be a great home for Push Pop Press," the statement added.Financial terms of the deal were not disclosed by the two companies.

BEIJING, Aug. 25 (Xinhua) -- China pledged on Thursday to make more efforts to aid people living in the drought-stricken Horn of Africa in collaboration with the International Committee for the Red Cross (ICRC)."We noticed that the ICRC launched an appeal regarding the situation in the Horn of Africa. The Red Cross Society of China (RCSC) has decided to donate 4 million yuan (about 623,000 U.S. dollars) to the ICRC for its humanitarian aid in the region," said Hua Jianmin, president of the RCSC, while meeting with visiting ICRC President Jakob Kellenberger in Beijing on Thursday.Earlier this month, the RCSC donated 8 million yuan (1.25 million dollars) to famine-plagued countries in the Horn of Africa to be used for emergency humanitarian aid.A donation of 2 million yuan was sent to Kenya through the country's Red Cross organization, while another 2 million went to Ethiopia. The other 4 million yuan was donated to other countries in the region.The Chinese government has decided to provide a total of 90 million yuan (14 million dollars) in emergency food assistance to countries in the Horn of Africa."The Red Cross Society of China is willing to work together with the International Committee for the Red Cross to meet the needs of those who have been affected (by the droughts)," Hua said.Some 12.4 million people in Kenya, Ethiopia, Somalia and other countries in the region are in dire need of food due to a serious drought, the worst to hit the region since the 1980s.