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BEIJING, Oct. 7 (Xinhua) -- Chinese scientists are developing new methods like spraying or dropping hepatitis vaccines into people's noses to replace traditional injections, according to a leading expert on immunology.Such researches were sponsored by a key national science project, according to Wen Yumei, an academician of the Chinese Academy of Engineering, also the chairwoman of the 14th International Symposium on Viral Hepatitis and Liver Disease, which is scheduled to be held in Shanghai next July.At a press conference held here Friday for the symposium, experts believed that broad-coverage inoculations is an effective way in facilitating the country's goal in controlling Hepatitis B.China's Ministry of Health has also credited its national immunization program for having protected about 80 million people from being infected with the Hepatitis B virus (HBV) in the 19 years after 1992.Recent report showed that about 93 million Chinese are HBV carriers, accounting for more than a quarter of the world's total.

WASHINGTON, Jan. 2 (Xinhua) -- A systematic review of previous studies suggests that there may be a positive connection between physical activity and children's academic performance, according to a report published Monday in the Archives of Pediatrics & Adolescent Medicine.A group of scientists at the Vrije Universiteit (Free University) Medical Center in the Netherlands reviewed evidence on the relationship between physical activity and academic performance because of concerns that pressure to improve test scores may often mean more instructional time for classroom subjects with less time for physical activity.The authors identified 10 observational and four interventional studies for review, 12 of which were done in the United States, one in Canada and one in South Africa. Sample sizes ranged from 53 to about 12,000 participants between the ages of eight years and 18 years old. Follow-up varied from eight weeks to more than five years."According to the best-evidence synthesis, we found strong evidence of a significant positive relationship between physical activity and academic performance. The findings of one high-quality intervention study and one high-quality observational study suggest that being more physically active is positively related to improved academic performance in children," the report said.Background information in the article suggests that exercise may help cognition by increasing blood and oxygen flow to the brain, increasing levels of norepinephrine and endorphin to decrease stress and improve mood, and increasing growth factors that help create new nerve cells and support synaptic plasticity."More high-quality studies are needed on the dose-response relationship between physical activity and academic performance and on the explanatory mechanisms, using reliable and valid measurement instruments to assess this relationship accurately," the report concluded.

BEIJING, Dec. 30 (Xinhua) -- China's quality watchdog said Friday that the latest checks by testing organizations did not find excessive levels of aflatoxin in milk products made by Chinese dairies.The special checks were launched after the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) reported on Dec. 23 that two batches of milk products made by two separate domestic dairies, including heavyweight Mengniu Dairy Group, were found to contain high levels of the cancer-causing toxin.A brief statement on the government agency's website Friday said the checks have covered major makers, including Mengniu, Yili Industrial Group, Bright Dairy, and Sanyuan Food.An AQSIQ official said earlier the toxin had originated from cows eating mildewed feed, citing reviews by experts. The toxin would disappear if the animals stop eating the rotten feed, the official said.Aflatoxin is produced by a fungus that commonly grows on crops such as grain and peanuts. High levels of the toxin may lead to cancer in some animals.

SHIJIAZHUANG, Oct. 16 (Xinhua) -- Chinese archaeologists said Sunday that they have found evidence of the cultivation of glutinous millet in the northern province of Hebei that could date back to 10,000 years, the earliest evidence of people growing the crop in the world.Lab results showed that remains of glutinous millet found at archaeological sites in Cishan Village in the city of Wu'an were harvested during the Neolithic Era between 8,700 to 10,000 years ago, scientists with the Institute of Geology and Geophysics of China Academy of Sciences (IGGCAS) said at a cultural festival held in Wu'an on Sunday.This means Cishan was the birthplace of the crop, archaeologists said.They have also found remains of foxtail millet in the pits, which could date back to between 8,700 and 7,500 years. This would be the earliest evidence of the crop's cultivation, which means that Cishan was the birthplace of foxtail millet, too, said Lu Houyuan, an IGGCAS scientist.Cultivating small-seeded dry crops was more prevalent than cultivating rice in prehistoric times, especially in China's semi-arid northern regions, Lu said.A total of 50,000 kilograms of grains have been stored in 88 pits for thousands of years at the Cishan Site, a Neolithic site discovered in 1972.In addition to grain remnants, pottery, stone tools, animal bones and bone artifacts have also been excavated from the site, which archaeologists believe will help their research in the emergence of agriculture in China.

BEIJING, Jan. 22 (Xinhua) -- On the eve of Spring Festival, people across China marked the last moments of the Year of the Rabbit with cheerful celebrations, while exchanging their wishes for a better and prosperous Year of the Dragon.Spring Festival, or Chinese New Year, falls on Monday but the week-long holiday started Sunday, with families, urban and rural as well as rich and poor, dining together and watching the year out in cheer.In a new community in Zhengzhou, capital of central China's Henan province, villagers relocated there for the nation's South-North Water Diversion project have their festival feasts paid for by the government."I've been buzzing around from office to office to get the festival allowances. Today is the third time money has been doled out before Spring Festival," said Lu Songtao, director of the resident committee of Jinyuan.The 60 households in Jinyuan are among the 330,000 people China has resettled for the central route of the massive water project, which aims to transport water from the Yangtze River to the country's drought-prone northern regions, including Beijing.Two month after bedding down in new homes with the help of government subsidies, villagers now wish their careers can also take off in the Year of the Dragon."There are many factories nearby, and I will start looking for a job right after the New Year, either in a battery plant or a food processing factory," said villager Liu Guizhi.In Wuhan, capital of Hubei province, sanitation workers who chose to stay on duty rather than be with their families during the festival ended up dining with the mayor."I'd like to thank you for a year's hard work that has kept the city beautiful," said Tang Liangzhi, mayor of Wuhan, at a banquet held on Saturday for 100 representatives of street cleaners.Though Spring Festival is an important family occasion for most Chinese, many cleaners could not leave their jobs as the week-long fireworks frenzy usually litters city streets with tonnes of cardboard and scraps of paper."I had been so busy today that I came to the banquet right from the street, with the my uniform on," said 51-year-old Yang Houjian."But I am deeply moved -- I feel my work is honored by the whole society," he said.This year's Spring Festival also brings a festive atmosphere to Xinjiang and Tibet, though celebrating the festival is not a tradition for many ethnic groups there. Young people, in particular, are mesmerized by the festival's "exotic" flavor."My friends from the Han community told me that it's their tradition to wear something red when their animal signs coincide with that of the year. So I bought a red bracelet as I'm a 'Dragon,'" said 23-year-old Hanati Kizihan, who is a Kazakh in Urumqi.Many households and institutions in Tibet have also put up national flags and portraits of Chinese leaders in honor of the national festival. On Sunday, a gigantic picture of China's central leaderships, represented by Mao Zedong, Deng Xiaoping, Jiang Zemin and Hu Jintao, was unveiled at the regional government building in Lhasa to celebrate the festival.