濮阳东方医院男科口碑好很放心(濮阳东方看妇科口碑好不好) (今日更新中)

WASHINGTON, May 11 (Xinhua) -- Johns Hopkins University researchers have demonstrated that human liver cells derived from adult cells coaxed into an embryonic state can engraft and begin regenerating liver tissue in mice with chronic liver damage.The work, published Wednesday in the journal Science Translational Medicine, suggests that liver cells derived from so- called "induced-pluripotent stem cells (iPSCs)" could one day be used as an alternative to liver transplant in patients with serious liver diseases, bypassing long waiting lists for organs and concerns about immune system rejection of donated tissue."Our findings provide a foundation for producing functional liver cells for patients who suffer liver diseases and are in need of transplantation," says Yoon-Young Jang, assistant professor of oncology at the Johns Hopkins Kimmel Cancer Center. "iPSC-derived liver cells not only can be generated in large amounts, but also can be tailored to each patient, preventing immune-rejection problems associated with liver transplants from unmatched donors or embryonic stem cells." A microsopic view shows human embryonic stem cells in various stages of differentiation into liver cells in this photo taken at Stanford University and released by the California Institute for Regenerative Medicine, March 9, 2009iPSCs are made from adult cells that have been genetically reprogrammed to revert to an embryonic stem cell-like state, with the ability to transform into different cell types. Human iPSCs can be generated from various tissues, including skin, blood and liver cells.Although the liver can regenerate in the body, end-stage liver failure caused by diseases like cirrhosis and cancers eventually destroy the liver's regenerative ability, Jang says. Currently, the only option for those patients is to receive a liver organ or liver cell transplant, a supply problem given the severe shortage of donor liver tissue for transplantation. In addition, mature liver cells and adult liver stem cells are difficult to isolate or grow in the laboratory, she says. By contrast, iPSCs can be made from a tiny amount of many kinds of tissue; and the embryonic stem- like iPSCs can grow in laboratory cultures indefinitely.For the study, Jang and colleagues generated human iPSCs from a variety of adult human cells, including liver cells, fibroblasts ( connective tissue cells), bone marrow stem cells and skin cells. They found that though the iPSCs overall were molecularly similar to each other and to embryonic stem cells, they retained a distinct molecular "signature" inherited from the cell of origin.

DAVOS, Switzerland, Jan. 28 (Xinhua) -- China and Switzerland formally launched bilateral talks on a free trade agreement Friday.Speaking at the opening ceremony, Chinese Commerce Minister Cheng Deming said the agreement talks between China and Switzerland have attracted huge attention and interest from the countries' leadership and business communities.Cheng expected a successful conclusion of the FTA negotiations. Cheng said a free trade agreement would enhance mutual trust between the two sides and promote economic development and closer ties between China and Switzerland.Swiss Federal Councilor Johann Schneider-Ammann expressed similar aspirations for the agreement as did his Chinese counterpart."The free trade agreement would further enhance trade and investment relations on a mutually beneficial basis, but also create many new opportunities for close exchange and cooperation," Schneider-Ammann said.China and Switzerland have seen fast-growing bilateral trade and investments for decade. In the past 10 years, China's exports to Switzerland have grown by 18 percent while Switzerland registered an even stronger 25 percent surge in exports to China.Currently, China is the largest trading partner of Switzerland in Asia, while Switzerland ranks ninth among China's trading partners in Europe.The Chinese commerce minister is leading a delegation at Davos to attend the World Economic Forum, which started Wednesday.

BEIJING, Jan. 25 (Xinhua) -- China's 11 government departments have jointly released a guideline outlining major measures to lessen noise pollution amid rising noise disputes and complaints, the Ministry of Environmental Protection said Tuesday.The ministry's spokesperson, Tao Detian, said Tuesday the country saw rising complaints about noise pollution, which has caused an increasingly negative impact on the living environment in recent years.The 26-article guideline focuses on addressing noise pollution in fields including industry, construction, traffic and people's daily lives.Further, the regulation bans businesses from using acoustic instruments outdoors to lure customers.Also, heavy noise polluters are banned from entering industrial parks, according to the guideline.Moreover, motor vehicles should strictly observe speed limits, traffic restrictions and use of auto horns around "noise-sensitive buildings" such as hospitals, schools, government organs, scientific research institutions and residential buildings, it said.According to the guideline, government departments would also impose higher fines on noise polluters and collect fees for "discharges of excessive noise," in accordance with law.The newly issued document calls on various government agencies, such as the ministries on environmental protection, science and technology, public security, finance, housing, transportation and railways, to make coordinated efforts to curb pollution.Further, government organs could launch regular inspection campaigns in major cities, it said.According to the guideline, government agencies will set up a system to examine sound-proof qualities of civilian buildings and provide a list of major noise pollution sources by the end of this year.Also, the guideline ordered major cities to establish an automatic noise monitoring system and to equip each city in the country with at least one noise display screen by the end of 2011.

CHIAYI, Feb. 26 (Xinhua) -- Chen Yunlin, the Chinese mainland chief negotiator with Taiwan, discussed cooperation prospects on Friday with fishermen and farmers in Chiayi in southern Taiwan.Chen, president of the mainland's Association for Relations Across the Taiwan Straits (ARATS), led a 50-member delegation and spoke at a seminar attended by more than 70 business people from both the mainland and Taiwan.He said small and medium-sized enterprises on both sides "played an important role in cross-Strait economic development, employment and in maintaining social stability.""Small- and medium-sized businesses are an important part of cross-Strait economic exchanges," he said, adding that among the more than 80,000 Taiwanese enterprises investing on the mainland, over 50 percent are small and medium-sized companies.Chen said that efforts should be made to enhance cooperation between small and medium-sized enterprises on the mainland and those in central and southern Taiwan.The mainland delegation arrived in Chiayi from Kaohsiung after investigating the investment environment with local business leaders. They arrived in Taipei on Wednesday at the invitation of Chiang Pin-kung, chairman of Taiwan's Straits Exchange Foundation (SEF). Both the SEF and the ARATS are authorized by the two sides to handle cross-Strait affairs.Chen said that since 2005, the mainland bought a large amount of farm and fishing products from Taiwan, which greatly boosted sales of Taiwanese products."Many renowned mainland distribution firms are present here at the seminar to seek cooperation opportunities with Taiwan's farmers and fishermen so that the sale of Taiwanese products on the mainland could increase steadily," he said.Chiang said the farming and fishing industries were the most important sectors in southern Taiwan.He added that the tax-reduction plan of the cross-Strait Economic Cooperation Framework Agreement's (ECFA) "early harvest" program, which took effect on January 1, covered 13 categories for farming products and five categories for fishing goods. Chiang said the plan was an opportunity for the industry to expand its exports to the mainland.He noted that the "early harvest" program's duty exemption also covered sectors like textiles, machinery components, and "all related to small- and medium-sized enterprises."Chiang said Friday's seminar was meant to promote cooperation between smaller businesses across the Strait, to deepen the effect of the ECFA to benefit both sides.The mainland delegation will continue its trip in southern Taiwan and return to Taipei late Saturday. They will visit Taipei's Neihu Industrial Park on Sunday before leaving the island on Monday.

来源：资阳报