梅州盆腔炎与附件炎(梅州那个医院做人流好) (今日更新中)

WASHINGTON, Nov. 7 (Xinhua) -- U.S. researchers have demonstrated for the first time that the brain is a key player in regulating glucose (sugar) metabolism in humans.The findings, published Monday in the online edition of the Journal of Clinical Investigation, suggest that drugs targeting the brain and central nervous system could be a novel approach to treating diabetes."The brain is the body's only organ that needs a constant supply of glucose to survive, so it makes sense that it would have some say over how much glucose is produced," said study leader Meredith Hawkins, professor of medicine and director of the Global Diabetes Initiative at Yeshiva University, in a statement. "This role for the brain was demonstrated in earlier studies in rodents, but there was considerable controversy over whether the results could be applied to humans. We hope this study helps to settle the matter."In an earlier study in rodents, researchers showed that activation of potassium channels in the brain's hypothalamus sends signals to the liver that dampen its production of glucose. Those findings, published in Nature in 2005, challenged the conventional thinking that blood sugar production by the liver (the body's glucose factory) is regulated only by the pancreas (which makes insulin to metabolize glucose). But carefully performed studies on dogs, conducted at Vanderbilt University, failed to replicate the results, suggesting the Einstein findings in rodents might not be relevant to higher mammals, including humans.The current study, involving people, was aimed at resolving this controversy. Ten nondiabetic subjects were given oral diazoxide, a drug that activates potassium channels in the hypothalamus. (The drug is not used to treat diabetes.) Hormone secretion by the pancreas was controlled to ensure that any change in sugar production would only have occurred through the drug's effect on the brain. After the researchers administered the drug, blood tests revealed that patients' livers were producing significantly less glucose than before.Hawkins and her team then repeated this in rats, again giving diazoxide orally, achieving similar results. They confirmed that sufficient amounts of diazoxide crossed the blood-brain barrier to affect potassium channels in the hypothalamus. Additional experiments confirmed that diazoxide was working through the brain. Specifically, the researchers were able to completely block the effects of diazoxide by infusing a specific potassium channel blocker directly into the brain."This study confirms that the brain plays a significant role in regulating glucose production by the liver," said lead author Preeti Kishore, assistant professor of medicine. "We are now investigating whether this 'brain-to-liver' pathway is impaired in people with diabetes. If so, we may be able to restore normal glucose regulation by targeting potassium channels in the brain."

BEIJING, Nov. 17 (Xinhua) -- Chinese State Councilor Liu Yandong on Thursday met with a U.S. artist delegation, vowing to promote bilateral cultural and art exchanges.Headed by President and Chief Executive Officer of the Asia Society Vishakha Desai, the delegation will participate in the China-U.S. Forum on the Arts and Culture from Nov. 16-19 in Beijing.Liu welcomed the U.S. artists, noting cultural and art exchanges are an important component of bilateral people-to-people exchanges.She said the founding of the forum established an institutionalized and constructive platform for deepening bilateral relations and friendship between the two peoples.Artists from the two countries should exert their influence and actively promote bilateral cultural exchanges, she said.The forum is organized by the Chinese People's Association for Friendship with Foreign Countries, the Asia Society and the Aspen Institute.An extraordinary line-up of American cultural icons will attend the event, including actress Meryl Streep, film director Joel Coen, musician Yo-Yo Ma, and best-selling author Amy Tan.

SAN FRANCISCO, Nov. 14 (Xinhua) -- Apple on Monday released a new version of its media player program iTunes, adding the much- anticipated scan-and-match service for music iTunes Match.The feature, included in iTunes 10.5.1, can scan a user's library to find music and match the content to the music available in iTunes Store. If it finds a match, users don't need to upload the music and can listen to them anywhere, even better-quality versions, on any devices running Apple's iOS operating system. Music that doesn't match is automatically uploaded.With a subscription fee of 24.99 U.S. dollars a year, users can store up to 25,000 of their own songs in Apple's cloud server. The iTunes Match is currently only available in the United States.Subscriptions for iTunes Match are unavailable for a while Monday morning due to excessive demand.The iTunes Match was first introduced in June along with Apple' s iCloud platform, the company's cloud service enabling users to sync their files, apps and content among Apple devices.Unlike Google and Amazon, Apple got the official blessings from all four major music labels, making the company only need to keep one copy of each song in its cloud server, eliminating the uploading work for users and redundancies for servers.When Apple's late co-founder Steve Jobs introduced the feature in his last keynote address in June, he touted the feature as "an industry leading effort," saying that the 24.99-dollar price is cheaper than Amazon's offering and Google has not announced a price yet.The release is also ahead of Google's latest music push. In an email invitation sent out last Friday, the search giant said it will hold an event called "These Go To Eleven" on Wednesday in Los Angeles. Tech news website The Verge reported that it will be the debut of the company's cloud music service Google Music.

SAN FRANCISCO, Oct. 17 (Xinhua) -- Apple on Monday announced that it has sold more than four million of its new iPhone 4S, three days after the launch last Friday."IPhone 4S is off to a great start with more than four million sold in its first weekend--the most ever for a phone and more than double the iPhone 4 launch during its first three days," said Philip Schiller, Apple's senior vice president of worldwide product marketing.In addition, more than 25 million customers are already using iOS 5, the latest version of the mobile operating system powering Apple's mobile devices, since it was released last Wednesday; and more than 20 million customers have signed up for iCloud, the cloud service designed to store and sync data for download to multiple devices, said the company in the statement.The iPhone 4S, which looks the same as the iPhone 4, has major hardware upgrade inside, including a faster chip, a higher- resolution camera and Siri intelligent voice control.Last Friday, AT&T and Sprint, two iPhone wireless carriers in the United States, said they have seen record daily sales with the launch of the iPhone 4S.The lasted Apple smartphone is currently on sale in the U.S., Canada, France, Germany, Japan and Britain, and will be available in 22 more countries on Oct. 28. Apple said the phone will be on sale in more than 70 countries and regions by the end of this year.

BEIJING, Jan. 21 (Xinhua) -- A locomotive producer in central China's Hunan province on Friday rolled out a low-cost magnetically levitated (maglev) train that is more environmental-friendly than conventional ones.The three-carriage train is designed to run at a maximum speed of 100 km per hour and carry 600 passengers, said Xu Zongxiang, general manager of Zhuzhou Electric Locomotive Co. Ltd. of China South Locomotive and Rolling Stock Corporation (CSR). Xu said the new train was much quieter than conventional ones. While a conventional train moves forward by using friction between its wheels and the railway tracks, the maglev train replaces wheels by electromagnets and levitates on the guideway. According to Xu, his company's has minimized the risk of the new maglev train derailing or overturning. "It's ideal for mass transportation, as it is quiet and environmental-friendly. Its manufacturing cost is about 75 percent of a conventional light-rail train," said Xu. The maglev train has a minimum turning radius of 50 meters and can easily run in residential communities or on hilly slopes. "It's an ideal public transport option for Chinese cities and major tourist destinations," said Xu. Railway transport specialist Liu Youmei, also an academician with Chinese Academy of Engineering, said the new train is green, economical and safe. "It can be used for public transport in populous areas and at scenic spots with fragile environments." Liu said China is one of a few countries that have applied maglev technology. Beijing is building a maglev route, the Daitai line (S1), which starts at its IT center in Haidian district, passes through Shijingshan district, and ends in Mentougou district on its western outskirts. The line will be operational next year.The eastern metropolitan of Shanghai runs the world's first commercial maglev system on a 30-km stretch between the downtown business district and Pudong airport. The German-made maglev went into operation on Dec. 31, 2002.

来源：资阳报