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BEIJING, Jan. 6 (Xinhua) -- Surveillance data on the size and frequency of earthquakes in Antarctica collected by China's Great Wall Station show that the continent is not earthquake-free, a Chinese seismic expert said Thursday."China's newly-built seismic observatory in Great Wall Station has documented a hundred-odd earthquakes occurring in the region over the past year," said Chang Lijun, a member of China's 28th Antarctic expedition team.The discovery challenges the prevailing notion that the Antarctic has no earthquakes, as many earthquakes have gone undetected due to lack of seismological observation in the region.However, thanks to technological advances, scientists have discovered that the continent is still subject to some minor tremors.Chang, also an associate researcher at China Earthquake Administration's Geophysics Institute, said last year's earthquakes ranged in magnitude from 0.5 to 4, scales which are usually undetectable to common people.The tectonic movements of Antarctica, which sits on two plates that pulled away from each other in the northern Ross Sea between 28 and 40 million years ago, but later converged, fascinate geologists worldwide.At the end of 2010, Chinese scientists set up a new broadband seismic observatory in Great Wall Station, greatly increasing China's ability to measure tremors and tectonic movements on the continent.

NANJING, Dec. 20 (Xinhua) -- Chinese Premier Wen Jiabao has called for the country to maintain confidence that it can weather challenges amid a "complicated and tough" outlook of economic development."As in 2008, we are now encountering difficulties which can be overcome through hard work," Wen said during his tour to eastern Jiangsu province on Sunday and Monday.Elaborating on the grim situation, Wen said the growth of China's exports has been slowing and the pace of the slowdown has accelerated, especially in the past three months. Meanwhile, the profit margin of the country's manufacturing industry has been squeezed and some enterprises have even fallen into the red.Chinese Premier Wen Jiabao (C) talks to staff members in a small loan company for rural areas in Suzhou National New & Hi-Tech Industrial Development Zone in Suzhou City, east China's Jiangsu Province, Dec. 19, 2011. Wen Jiabao made an inspection tour in Jiangsu on Dec. 18 and 19. He noted that the country is also facing shrinking external demand, rising costs and pressure from both slowing economic growth and high inflation, which makes macro-economic regulation more difficult.Despite emerging challenges, however, the current momentum of China's economic development is "generally good," Wen said.China's economic growth has been slowing all year but remains above the global average. Its GDP growth slowed to 9.1 percent in the third quarter from 9.5 percent in the second quarter and 9.7 percent in the first quarter.To tackle the challenges, Wen said the country will boost domestic demand while stabilizing external demand and keep its export policies such as export tax rebates "basically stable" in the coming year.Efforts should also be made to enhance domestic enterprises' competitiveness, promote the transfer of industry to the country's western regions, and develop the international market, especially in emerging economies, he said.He said China will stick to, and further improve upon, the opening-up policy and welcome foreign enterprises to invest in the country, adding that the country will protect intellectual property rights and implement a fair and open bidding approach in terms of government procurement.Wen also demanded efforts be made to encourage private investment in sectors such as railways, public facilities, finance, energy, education and health-care.Furthermore, he urged banks to take concrete action in better serving the real economy and asked financial institutions to enhance support for enterprises while improving management in order to control the capital bubble and prevent risks.Wen said the southern parts of Jiangsu should engage in a comprehensive development strategy to build the province into a forefront of the country's opening-up drive.

BEIJING, Jan. 05 (Xinhuanet) -- Tighter licensing and banning unlicensed food processors are two measures needed to improve the poor quality of cooked food in Guangzhou markets, says a new proposal.The proposal, to be presented to the Guangzhou committee of the Chinese People's Political Consultative Conference, notes that producers of unpacked cooked food currently only need to obtain a food circulation permit.Many of them process food in unlicensed workshops with poor sanitation, and some producers even use substandard materials in food processing.The annual session of the conference opens on Tuesday.Recent tests of unpacked cooked food found that of 100 samples of meat, flour-based food, preserved vegetables, soybean products and algae products, only 38 passed the inspection.No cold dried bean curd or cold algae products passed the tests, which were carried out at seven supermarkets in Guangzhou, Guangdong province, by the city's consumers' commission.Excessive microorganisms were the main reason for failing the tests. Fifty-five samples contained excessive coliform and 12 had golden staph.Meanwhile, in tests of unpacked cooked food at supermarkets in Guangzhou by the city's commerce authority in the third quarter of last year, only 28 of the 71 samples passed the tests. In addition to excessive bacteria, excessive use of coloring agents was also spotted.The situation at other markets, such as wet markets, is more worrying, says the proposal.It also suggests that separate cooked food processing areas be built in local markets, with closer scrutiny over them.Standards concerning the processing, storage and transport of those food products remain unspecified.Some supermarkets, on the other hand, have been lax in selecting suppliers and failed to install protective facilities in shelving the food.Given that a number of government agencies are involved in food safety work, the proposal suggests that a shared information platform be built to prevent loopholes.The food associations should also play a bigger role in supervising food enterprises, it says."Since cooked food goes through the production, transport and shelving steps, it is hard to guarantee the quality. Even packed food has quality problems, not to mention unpacked food," said Ding Honghui, a resident who was shopping at a supermarket in Guangzhou."As far as I know, many government departments are involved in safeguarding food safety. They should strengthen the supervision and work more closely," he said.

BEIJING, Oct. 21 (Xinhua) -- Vice President Xi Jinping has said China is willing to cooperate with Russia on strategic security matters, and that the two nations should work more closely on bilateral and multilateral issues.Xi made the remarks on Thursday in his meeting with Russian Security Council Secretary Nikolai Patrushev, according to a press release issued by the Chinese Foreign Ministry on Friday.China will work more closely with Russia in order to strengthen communication and coordination on regional and international issues, Xi said.Patrushev is in Beijing to co-chair the sixth round of China-Russia strategic security talks with Chinese State Councilor Dai Bingguo.Chinese Vice President Xi Jinping (R) shakes hands with Russian Security Council Secretary Nikolai Patrushev (L) in Beijing, capital of China on Oct. 20, 2011.Xi spoke highly of the contribution made by the China-Russia strategic security talks in boosting bilateral political mutual trust and strategic coordination, calling on the two sides to step up strategic coordination in a bid to better safeguard the common interests of the two nations and promote peace and stability in the world.Citing the significant and profound transition of the international situation, Xi said the two nations face opportunities as well as challenges in maintaining a strategically secure environment for their own development.On bilateral relations, Xi said China always prioritizes its relations with Russia in the country's foreign policy. He expressed China's willingness to make concerted efforts with Russia to push forward bilateral cooperation in the political, economic, energy, science and technology fields.Russia was highly satisfied with the current development of the bilateral ties, Patrushev said, proposing the two sides should strengthen strategic communication, expand mutual trust and cement coordination in multilateral organizations such as the United Nations and the Shanghai Cooperation Organization.China-Russia strategic security talks were initiated by leaders of the two countries in 2005.

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."