山东风痛与痛风的区别(济南痛风病人尿酸多高) (今日更新中)

WELLINGTON, July 29 (Xinhua) -- Scientists from around the world will gather on the east coast of New Zealand next week to discuss proposals to study "silent" earthquakes by drilling into the seabed.Silent quakes, also known as slow slip events, occur on the boundaries of the earth's tectonic plates, where one plate dives under another in areas known as subduction zones, and are slower than normal quakes, taking weeks or months to occur rather than seconds, and are rarely felt on the surface.About 70 scientists from 10 countries will convene in the city of Gisborne, which lies near the site of a major fault line and where scientists first identified silent earthquakes in 2002.Slow-slip events were first discovered with the advent of new measurement technologies on the west coast of Canada about 15 years ago and have since been recorded at about a dozen locations around the world, including four sites around New Zealand, said a spokesperson for New Zealand's Institute of Geological and Nuclear Sciences (GNS Science).About eight slow-slip episodes have occurred under Gisborne since 2002 at roughly two-year intervals.Scientists have proposed numerous theories to explain the phenomenon, but testing the theories is difficult as silent quakes happen many kilometers below ground."The best way to understand the true cause of slow-slip events is to drill into and sample the area on the plate boundary fault where they are known to occur, and monitor a whole range of physical and chemical properties at the plate interface," said Laura Wallace, of GNS Science.

HONG KONG, Sept. 9 (Xinhua) -- The Hong Kong Polytechnic University (PolyU) announced Friday that its surveying experts had successfully developed methodologies for precise mapping of the Moon, after intensive analysis of the data captured by the Chinese lunar orbiter ChangE-1 and other lunar exploration missions.According to the PolyU, the team has made significant contributions to lunar mapping. Their efforts culminated in the development of a unique and innovative approach to the creation of accurate 3D models of the lunar surface.The team has produced the most updated parameters of the lunar figure (the shape of the moon), which is essential for lunar mapping using 17.5 million laser altimetry measurements from the ChangE-1and the Japanese SELENE missions.In addition, they also used the new topographic and gravity models to calculate improved crustal thickness and mass distribution of the Moon and established that the average thickness of the Moon's crust is about 40 km on the near side and 50 km on the far side.It was introduced that the resulting lunar mapping was the hard work of a dedicated research team led by Professor Chen Yong-qi, Emeritus Professor of the Department of Land Surveying and Geo-Informatics, who is also serving on the Expert Committee of China's Lunar Exploration Programme (ECCLEP), with the concerted efforts of team members Prof. Chen Wu, Prof. Ding Xiao-li, Prof. Baki Iz, Dr. Bruce King, and Dr. Wu Bo.According to Chen Yong-qi, the lunar mapping project started in 2006. The primary objective was to develop the methodologies and techniques for mapping the Moon surface, which is much more challenging than mapping the Earth's surface because of very few surveyed control points which are essential for accurate map making.Statistics showed that there were only fourteen lunar laser ranging retro reflectors (LRRR) and Apollo lunar surface experiment package (ALSEP) transmitter sites with accurately known coordinates available only on the near side of the Moon, installed by the U.S. Apollo and former Soviet Union Luna missions in the 1960s.Moreover, according to the team, the gravitational field of the Moon is not as well-known as that of Earth, which means the accuracy of the computed lunar satellite's position at any given time is lower than for Earth satellites, thus degrading the mapping accuracy and reliability.In addition, the team expressed that highly reflective lunar surface created significant problems for the automatic processing of images to develop 3D models using the technique of photogramemtry, which is a widely used and highly reliable technique for the creation of maps and 3D models on Earth.Furthermore, the team also revealed they had a plan to compare such data with other data sources in order to evaluate the performance of the ChangE mapping sensors. Since Chen Yong-qi is serving on the ECCLEP, the team has direct access to more recent data captured by the ChangE satellite.

HAVANA, Aug. 15 (Xinhua) -- Cuba's Ministry of Public Health launched an intensive sanitation campaign Monday against the Aedes Aegypti mosquito, which can spread dengue fever.The operation, which is running through Sept. 15, will cover the most vulnerable cities in the country, including the capital Havana and the eastern city Guantanamo.Deputy Health Minister Luis Estruch stressed the importance of the prevention campaign and urged all families to check their houses for mosquitoes each week.Maria Guadalupe Guzman, director of the Pan-American and World Health Organization Cooperation Center for the Study of Dengue and Its Vector at the Pedro Kouri Institute of Tropical Medicine, said the epidemiological situation in the country is stable. However, she warned that an epidemic outbreak is still possible in the island state, given the high temperatures and heavy rains in the eastern areas, and drought in the west.Cuba, along with Chile and Uruguay, are the only Latin American countries where dengue is not endemic.In 1981, the country suffered its worst dengue outbreak in history, which left 158 dead.

SINGAPORE, Sept. 7 (Xinhua) -- Singapore scientists have found possible new ways to treat a type of aggressive breast cancer that is unresponsive to current forms of treatment, local broadcaster Channel NewsAsia reported on Wednesday.The team of scientists at the Genome Institute of Singapore ( GIS) and National University of Singapore (NUS), led by GIS senior group leader Qiang Yu, found that the enzyme EZH2 acts by inhibiting genes that stop the growth of tumors in the body.The insights could open the door to developing more effective treatment for fast spreading breast cancers, especially the estrogen receptor-negative breast cancer that is common all over the world.It was also found that through EZH2, cancer is promoted in the body by activating specific genes that impact breast cancer progression and cancer stem cell self-renewal.Yu said the new understanding on how EZH2 works as a cancer- causing gene in breast cancer has important therapeutic implication."The results suggest that small molecule drugs that block enzyme activity of EZH2 may not work for cancers caused by EZH2's activation genes," Yu said.Currently pharmaceutical companies have been developing drugs only to the block EZH2 enzyme activity so that tumor suppressers can perform their protective role in blocking cancer growth.Researchers said the next step would be to develop biomarkers to identify tumors with EZH2.This step would enable better treatment methods, with one of options being the development of therapies that shut down EZH2 completely and not just inhibit its enzymatic function.The findings have been published on the journal Molecular Cell.

UNITED NATIONS, June 9 (Xinhua) -- Partners from UN agencies and governments, as well as civil society and the private sector gathered here Thursday to launch "Countdown to Zero: Global plan towards the elimination of new HIV infections among children by 2015 and keeping their mothers alive.""Governments and foundations that support this plan are saying: we treasure all life equally," said UN Secretary-General Ban Ki- moon, who spoke at the event. "We give all people the best possible chance. We provide health care to all who need it."This new plan, which was formulated by a Global Task Team of more than 30 governments and 50 international and national organizations, aims to bring the number of new HIV infections in children to zero by the middle of the decade and help their mothers survive.The launch of Countdown to Zero came on the sidelines of the UN High-Level Meeting on AIDS, which runs from June 8-10, and has been an opportunity for participants to take stock of gains made in combating the disease and to agree on a declaration that will direct the actions of member states to prevent and treat HIV/AIDS over the next five years.Ban told the audience at the launch that history has proven that it is possible to make great strides in fighting HIV/AIDS, with the right amount of effort and coordination."Let us not forget that some regions have nearly achieved no new infections from mother to child," he said. "If we push hard, as we have committed today, with your continued help and with the will to do what is right for the world, we can spread this success to mothers everywhere."According to the Joint UN Program on HIV/AIDS (UNAIDS), the rate of HIV/AIDS transmission from mother to child was been reduced by 26 percent from 2001 to 2009.Former U.S. President Bill Clinton, who spoke at the launch, said that he believes the time to eliminate HIV/AIDS in children is at hand."We are here because we all recognize that the time has finally come to end pediatric AIDS worldwide and we believe we can do it," he said. "We know we have the capacity to produce the medicine, we know that."Clinton emphasized the fact that HIV/AIDS is often prevalent in less developed countries. Sub-Saharan Africa remains the region that has the most HIV/AIDS infected people."There are still too many kids who are born HIV-positive," he said. "Just 22 countries account for 90 percent of those pediatric infections."He said that there are not only moral reasons for wealthier countries to help these nations by investing in their HIV/AIDS responses, but that by doing so they increase their soft power -- influence that utilizes non-coercive measures."I think its important in a world where no one wants to look weak and the military justifiably has a claim on all of our budgets, we not forget that what my secretary-of-state often refers to as soft power issues, they have a bigger impact on our long term security," Clinton said. "I think that accounts in no small measure for the presence of leaders of global corporations here at this meeting today, they know this as well."Collaboration and close coordination of responses to HIV/AIDS, Clinton said, is also essential."There are still too many places where HIV and maternal and child health groups work completely separately," he said. "That dramatically reduces the likelihood that mothers are their babies will receive the full range of care. We simply have to all work together, both within governments and all of those who are trying to help to ensure that mothers get the drugs they should and that their babies are born without the virus."Clinton said that Goodluck Jonathan, president of Nigeria, who gave a statement at the launch as well, is an excellent example of the "strong political leadership and personal commitment" necessary to defeat HIV/AIDS and reach to goals set by the Countdown to Zero plan.In his speech, Jonathan said that Africa is has banded together through the Abuja Declaration, adopted in 2001, which turned attention and resources towards public health problems on the continent, particularly HIV/AIDS."That declaration was to make African countries spend at least 15 percent of their budget on their health sector and a reasonable percentage of this would be geared towards HIV prevention and control," he said.Budgeting shortfalls for fighting HIV/AIDS in Africa must be accounted for, Jonathan said, as African countries must not rely solely on donors to fund their responses."I intend to explore in the coming months in collaboration with colleagues in sub-Saharan Africa an effective and creative funding mechanism to ensure ownership and long terms sustainability of the HIV and AIDS response in Africa," he said.

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