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BEIJING, Dec. 23 (Xinhua) -- The personal information of more than 6 million Internet users on CSDN, or China Software Developer Network, the country's largest programmers' website, was leaked by hackers, raising concerns about web security and triggering widespread panic.The leak was first exposed by China's leading anti-virus software provider, Beijing-based Qihoo 360, on Wednesday. The company said the leak included user IDs, passwords and e-mail addresses in clear text.The hacking case escalated on Thursday after the personal details of subscribers to more websites, including popular online gaming and social networking sites, were leaked.Online media reports said the personal data of up to 50 million Internet users has been leaked so far, but the number could not be independently verified.In response, the National Computer Network Emergency Response Technical Team/Coordination Center of China (CNCERT/CC) issued a statement Thursday, saying the CSDN's user data bank that leaked on the Internet was created before April 2009 and the passwords were stored in clear text, but the passwords had been encrypted after the data bank was upgraded in April 2009."Therefore, similar security problems have not been found in the newest user data bank," the statement said.Technical experts are investigating how many websites and users were actually involved in the hacking case, said Zhou Yonglin, director of the CNCERT/CC Operating Department."False information and exaggerations cannot be ruled out," he said.Nevertheless, CNCERT/CC has ordered CSDN to take immediate action in repairing the system hazards and providing users with timely security solutions.Computer security experts at Qihoo 360 believe the leak has spread to other websites."Many Internet users have registered the same passwords for their e-mail, microblog, online gaming and online payment accounts, so, if the server of one of the websites is hacked, their accounts and passwords on other websites would also be stolen," said Qihoo 360's Dr. Shi Xiaohong.Police authorities in Beijing told Xinhua on Friday that an investigation has been launched.WEB SECURITY IN QUESTIONDisgruntled Internet users in China rushed to change their passwords after the leak occurred, the largest of its kind in the history of China's Internet development."It is very annoying. I had to spend almost an hour changing the passwords of all my online accounts, especially those for payment accounts," said Li Xing, a white-collar worker at a technical company in Beijing.

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.

WASHINGTON, Jan. 2 (Xinhua) -- A hormone derived from visceral fat called adiponectin may play a role as a risk factor for development of all-cause dementia and Alzheimer's disease (AD) in women, according to a study published on Monday in online issue of the Archives of Neurology.Thomas van Himbergen, from Human Nutrition Research Center on Aging at Tufts University, and colleagues measured levels of glucose, insulin, and glycated albumin, as well as C reactive protein, lipoprotein associated phospholipase A2, and adiponectin in the plasma of patients at the 19th biennial examination (1985 -- 1988) of the Framingham Heart Study.The 840 patients (541 women, median age of 76 years) were followed-up for an average of 13 years and evaluated for signs of the development of AD and all-cause dementia. During that time, 159 patients developed dementia, including 125 cases of AD. After adjustment for other dementia risk factors (age, low plasma docosahexaenoic acid, weight change) only adiponectin in women was associated with an increased risk of all-cause dementia and AD."It is well established that insulin signaling is dysfunctional in the brains of patients with AD, and since adiponectin enhances insulin sensitivity, one would also expect beneficial actions protecting against cognitive decline," the authors write. "Our data, however, indicate that elevated adiponectin level was associated with an increased risk of dementia and AD in women."

XIAMEN, Dec. 26 (Xinhua) -- The three-decade achievements of the Xiamen Special Economic Zone have shown that China has made the right decision to set up special economic zones (SEZs), President Hu Jintao said Monday.Hu made the remarks in a congratulatory letter to a gala held Monday in southeastern Fujian province's city of Xiamen, which is celebrating the 30th founding anniversary of its special economic zone.Over the past 30 years, the Xiamen Special Economic Zone has made marked socio-economic progress, made significant changes in people's lives, and served as a pilot area for the country's reform and opening-up and socialist modernization, Hu said.The Xiamen Special Economic Zone has made a unique contribution to promoting cross-Strait economic and trade cooperation as well as culture and personnel exchanges, Hu said in the letter.Hu also urged the economic zone to further enhance the capability of independent innovation, ensure and improve people's well being, strengthen and make innovations in social management, and better serve the peaceful development of the cross-Strait relationship.He Guoqiang, a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, attended and addressed the gala.In his speech, He said the economic zone should develop high-end manufacturing business and a modern service industry, while speeding up the establishment of a market-oriented technology innovation system that integrates production with scientific research.The economic zone needs to make greater efforts in energy saving and emissions reduction as well as environmental protection by greatly developing a green and recycling-based economy, according to He.He also said that the economic zone should exert itself to increase the income of rural and urban residents, especially low-income residents, and meet people's basic requirements in terms of education and culture, employment, medical services and housing."Reasonable appeals of the people should be addressed, and behavior that undermines people's interests should be resolutely rectified," He said.In addition, He expects the Xiamen Special Economic Zone to thoroughly implement the cross-Strait Economic Cooperation Framework Agreement (ECFA) and further explore and enhance cooperation in finance and logistics with Taiwan, He said.The economic zone should also strengthen the development of direct flights, customs clearance and ports in order to facilitate direct exchanges across the Taiwan Strait, according to He.He also met with representatives of Hong Kong, Macao and Taiwan residents and overseas Chinese, who attended the gala.He said people from all walks of life in Hong Kong, Macao and Taiwan have long been active in investing, financing education and alleviating poverty in Fujian.They have not only shared the opportunities that the country's reform and development have brought forth and expanded their own enterprises, but also greatly boosted the country's socio-economic progress, He said."You are witnesses, participants and beneficiaries of the reform and opening up," He said to these representatives.The Xiamen Special Economic Zone is one of the four earliest SEZs set up after China initiated the reform and opening up in 1978. In 1984, it was expanded from the initial 2.5 square kilometers to 131 square kilometers. Last year, it was extended to span the entire city.

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.