崇义算命准的人(什邡算命哪里准) (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.

SAN FRANCISCO, Nov. 11 (Xinhua) -- Facebook is close to a settlement with the U.S. Federal Trade Commission (FTC) over the charges that the world's largest social network misled users about its use of their personal information, the U.S. media reported Friday.The proposed settlement would require Facebook to get users' consent before making "material retroactive changes" to its privacy policies, said a report from The Wall Street Journal, citing people familiar with the talks.The agreement with the FTC is also expected to ripple much farther in the tech industry as more companies are developing programs to observe people's online behavior and profiting from the personal information, such as the target advertisements.With a current 800-million-user base worldwide, Facebook changed its user policy in late 2009 to disclose more of users' personal information without adequate notice, leading to a federal investigation along with mounting complaints online.On Thursday, two U.S. representatives asked the Palo Alto, California-based company to explain a February patent application, saying that it raises alarm bells about how the company tracks users on other websites.Outside the U.S., Facebook is also drawing criticism on its privacy policies in countries with strict privacy laws, such as Germany. On Thursday, German authorities said they are considering suing Facebook over its use of facial recognition technology.In a PBS interview aired earlier this week, Facebook's founder and chief executive officer Mark Zuckerberg and chief operating officer Sheryl Sandberg said the company is focused on privacy, addressing that it gives users the ability to protect their privacy.Zuckerberg said Facebook users volunteer all of their personal information on the social network, unlike other Internet giants and advertising networks that compile information "behind your back."

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, Nov. 9 (Xinhua) -- A Chinese Mars orbiter named Yinghuo-1 was successfully launched on Wednesday morning from Russian-leased Baikonur cosmodrome in Kazakhstan, China's authorities said. The orbiter was launched by a Zenit-2 booster rocket at 4:16 a.m. Beijing time Wednesday (2016 GMT Tuesday), hitching a ride on Russia's Phobos-Grunt (Phobos-Soil) craft, an unmanned probe on Phobos, a moon of Mars, said China's State Administration for Sciences, Technology, and Industry for National Defence.

PARIS, Dec. 23 (Xinhua) -- French health authorities on Friday urged 30,000 women to remove the local-made breast implant, pledging that relevant expenses would be covered by the state.The health ministry said in a statement that they spot "no increased risk of cancer currently in women wearing the PIP (Poly Implant Prothese) brand compared with other implants.""However, well-established risks associated with these prostheses are rupture and irritant gel may lead to inflammatory reactions, making it difficult to explant," the statement added.French Health Minister Xavier Bertrand advised French women who have the PIP implants to get them taken out "as a preventive measure but not of an urgent nature." The removal of the implant will be at the state's expense.The recommendation came after eight cases, mainly breast cancer, were reported recently among women with PIP implants.The involved implant was produced by the French company PIP, once the world's third-largest producer of silicone implants who sold its products to tens of thousands of women in more than 65 countries, mainly in South America and western Europe.

来源：资阳报