中山肛门处有肉疙瘩(中山为什么一蹲下肛门就流血) (今日更新中)

WASHINGTON, Dec. 7 (Xinhua) -- Drugs that affect the levels of an important brain protein involved in learning and memory reverse cellular changes in the brain seen during aging, according to an animal study published Wednesday in the Journal of Neuroscience. The findings could one day aid in the development of new drugs that enhance cognitive function in older adults.Aging-related memory loss is associated with the gradual deterioration of the structure and function of synapses (the connections between brain cells) in brain regions critical to learning and memory, such as the hippocampus.Recent studies suggested that histone acetylation, a chemical process that controls whether genes are turned on, affects this process. Specifically, it affects brain cells' ability to alter the strength and structure of their connections for information storage, a process known as synaptic plasticity, which is a cellular signature of memory.In the current study, Cui-Wei Xie, of the University of California, Los Angeles, and colleagues found that compared with younger rats, hippocampi from older rats have less brain-derived neurotrophic factor (BDNF) -- a protein that promotes synaptic plasticity -- and less histone acetylation of the Bdnf gene. By treating the hippocampal tissue from older animals with a drug that increased histone acetylation, they were able to restore BDNF production and synaptic plasticity to levels found in younger animals."These findings shed light on why synapses become less efficient and more vulnerable to impairment during aging," said Xie, who led the study. "Such knowledge could help develop new drugs for cognitive aging and aging-related neurodegenerative diseases, such as Alzheimer's disease," she added.

BEIJING, Dec. 12 (Xinhua) -- A Foreign Ministry spokesman said on Monday that China welcomes the EU's new measures for coping with the European sovereign debt crisis worked out at the recently-concluded EU summit."We hope relevant measures can help stabilize the market, boost confidence in the market, stop the crisis from worsening, promote employment and economic growth, and push forward European integration," Foreign Ministry Spokesman Liu Weimin said at a routine press briefing.Last Friday at the summit in Brussels, EU leaders agreed on establishing a new "fiscal compact" based on inter-governmental treaties rather than the expected EU treaty changes. Britain opted out of the compact.Under the fiscal compact, member states will have to submit their draft budgetary plans to the European Commission, the EU's executive arm.As world's largest economy, the stable and healthy growth of the European Union and the Eurozone will be crucial to maintaining the momentum of recovery in the world economy, Liu said.China will maintain its support for EU integration, and continue to back the EU's efforts in combating the debt crisis in various ways, so as to jointly promote the stability of the international financial market and the recovery and growth of the world economy, he said."We are confident in Europe and the Eurozone, and believe that the EU has the ability and wisdom to resolve the sovereign debt crisis," Liu said.

RIO DE JANEIRO, Oct. 21 (Xinhua) -- Representatives from 120 countries attending the WHO's World Conference on Social Determinants of Health on Friday pledged to maintain investments in healthcare to reduce social gap.A statement adopted at the conference urged governments to maintain international collaboration and promote equal access to healthcare regardless of wealth.Brazilian Health Minister Alexandre Padilha said the economic woes in many countries cannot be a reason to "diminish" their social policies."The crisis cannot be an obstacle, instead it must be an opportunity to consolidate social policies," he said.Brazilian Foreign Minister Antonio Patriota said at the conference that health was an issue related to sustainable development, which will be discussed at the UN's Rio +20 Conference in 2012."The conference that ended today is an important step toward Rio +20," he said.

SHANGHAI, Oct. 14 (Xinhua) -- The government of Shanghai, the largest metropolis in eastern China, plans to require users of matchmaking websites to register their real names, a move to make those websites a more honest and ordered community, authorities said on Friday.The environment of the matchmaking websites is chaotic and the anonymity afforded by the Internet opens the door to cybercrimes such as fraud, said Zhou Juemin, chairperson of Shanghai Matchmaking Organization Administration Association.Officials with the Shanghai Civil Affairs Bureau said people who put up personal ads in newspapers may also be requested to use their real names in the future.China's matchmaking industry has been thriving in recent years as the country is witnessing an increase in the number of singles. Statistics from the All-China Women's Federation shows China currently has around 180 million singles.

TAIPEI, Dec. 3 (Xinhua) -- A televised debate among three candidates for the upcoming election of Taiwan leader was held Saturday in Taipei, with cross-Strait issues highlighted in the first face-to-face debate before the Jan. 14 election.The candidates - Ma Ying-jeou, chairman of Taiwan's ruling Kuomintang (KMT) party, Tsai Ing-wen who represents the island's major opposition Democratic Progressive Party (DPP), and People First Party (PFP) chairman James Soong - stated their political views respectively and debated with each other.Both Ma and Soong stressed the adherence to the 1992 Consensus in order to maintain peaceful development of cross-Strait relations.In November 1992, the mainland's Association for Relations Across the Taiwan Straits and Taiwan's Straits Exchange Foundation reached the consensus that each of the two organizations verbally acknowledges that "both sides of the Taiwan Straits adhere to the one-China principle."Ma said the 1992 Consensus was "the best way" for the two sides to settle disputes and achieve win-win situation."If the 1992 Consensus was not adhered to, cross-Strait relations will be thrown to an uncertain state, or even regress," Ma said.While acknowledging achievement of cross-Strait relations since 2005 such as the signing of the Economic Cooperation Framework Agreement (ECFA) across the Strait, Soong called for seeking "common benefits for all" with cross-Strait peaceful development as the precondition.However, Tsai continued to deny the 1992 Consensus and said that a "Taiwan consensus" should be made before negotiating with the Chinese mainland.The three candidates also expressed own views on judicial reform, finance and issues concerning people's livelihood.The televised debate was held by the Taiwan Public Television Service and other local media.Two more debates will be held on Dec. 10 and Dec. 17.

来源：资阳报