济南尿道炎的临床表现(济南有什么办法延长射精) (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, 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.

BAGHDAD, Nov. 15 (Xinhua) -- Iraqi President Jalal Talabani told the newly-arrived Chinese ambassador Tuesday that Iraq is willing to expand cooperation and strengthen ties with China.Talabani made the statement when receiving the credential from Ni Jian, China's new ambassador to Iraq, in his presidential palace.The friendship between Iraq and China can be traced back to more than a millennium ago and endured the test of time, Talabani said.The recent years have seen increasing cooperation and exchanges between the two countries in multiple fields, bearing positive results and breakthroughs, he said.Ni Jian said that China attaches great importance to the Chinese-Iraqi relations and is willing to broaden friendly ties with Iraq on the basis of equality and mutual benefit.

ROME, Dec. 6 (Xinhua) -- China is playing its part in projects of the United Nations to improve global food security under the framework of South-South Cooperation (SSC), the UN Food and Agriculture Organization (FAO) said on Tuesday.FAO recently co-signed two new tripartite agreements with China, Liberia and Senegal respectively to support implementation of a series of food security initiatives and projects in Liberia and Senegal, the organization said in a press release.The Rome-based food agency said the agreements were signed in the context of the Strategic Alliance between FAO and China on SSC in support of programs for food and nutrition security in selected countries.The funding provided through the new agreement comes from a FAO-China Trust Fund of 30 million U.S. dollars, it said.Under the agreement with Liberia, China will contribute over one million dollars and provide technical assistance through 24 Chinese experts and technicians to support implementation of the country's National Program for Food Security over a two-year period.In Senegal, China will provide assistance through 26 experts and technicians."At a time when continued economic uncertainties are having an impact on the flow of traditional North-South development assistance, South-South Cooperation is creating and building on partnerships that support the direct exchange of financial and technical contributions between developing countries," said Laurent Thomas, FAO Assistant Director-General, Technical Cooperation Department."FAO's experience with South-South Cooperation has shown that the knowledge and skills of technical experts and field technicians from the (global) South have made an invaluable contribution to efforts to modernize small-scale agriculture throughout the developing world," he added.FAO's SSC initiative was launched in 1996 to provide technical support to country-level action on food insecurity.According to the organization, a total of 47 tripartite agreements have been signed to provide technical assistance among developing countries in Africa, Asia-Pacific, Latin America and the Caribbean, and over 1,500 experts and technicians have been fielded in the framework of various food security initiatives.In addition to the Strategic Alliance with China, letters of intent for SSC Strategic Alliance have also been signed so far with Argentina and Indonesia.

BEIJING, Dec. 14 (Xinhua) -- The People's Bank of China, the country's central bank, said Wednesday that China will continue its prudent monetary policy next year while making the policy more targeted, flexible and forward-looking.The announcement came after the conclusion of the annual central economic work conference Wednesday morning, which has set economic policy guidelines for the coming year.The central bank will maintain control over the intensity, pace and focus of macroeconomic regulation, make full use of monetary tools, tune up credit supply and promote reasonable growth in social financing, according to a statement posted on its website.The bank will improve credit structure, increase support to key sectors and weak areas, especially to agriculture, small and medium-sized enterprises and affordable housing construction, as well as better serve the real economy.It will continue to perfect its yuan exchange rate formation mechanism, and keep the yuan exchange rates basically stable at a reasonable and balanced level.Meanwhile, the bank will strengthen and improve its foreign exchange management, deepen financial system reforms, prevent and solve financial risks, the statement said.

来源：资阳报