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BEIJING, Sept. 30 (Xinhuanet) -- Tobacco companies concealed the knowledge of radioactive substance in cigarettes from public for over four decades, a new study revealed.The revelation was made by a research team from the University of California, Los Angeles, published on Thursday in the online edition of the U.S. medical journal Nicotine and Tobacco Research.The researchers analyzed 27 timeworn documents and discovered that tobacco companies had knew the existence of polonium-210, a hazardous radioactive substance, in the tobacco since 1959.The companies studied polonium-210 throughout the 1960s, and concealed their findings about the carcinogenic potential of the radioactive substance.Hrayr Karagueuzian, the study's lead author, said the tobacco companies' deception surprised him.According to the revelation, the companies had knew the "cancerous growths" in the lungs of smokers, and even calculated how much radiation a regular smoker would inhale over 20 years.Karagueuzian and his team conducted again the study recorded in the tobacco documents and found that the radiation in cigarettes would cause up to 138 deaths for every 1,000 smokers over a period of 25 years.However, tobacco manufacturer denied that they had concealed the facts from the public.David Sutton, spokesman of Philip Morris, the largest U.S. tobacco company, said the polonium-210 was a "naturally occurring element in the air" and had been widely discussed by the public health community for years.

ADDIS ABABA, Oct. 22 (Xinhua) -- China on Saturday delivered portion of the first batch of emergency food assistance to Ethiopia.Wei Hongtian, Charge d'Affairs at the Chinese Embassy in Ethiopia, handed over the assistance certificate to Wondirad Mandefro, Ethiopian State Minster of Agriculture, in a ceremony held at the Office of the Ethiopian Disaster Risk Management Food Security Sector (DRMFSS) in Addis Ababa, Ethiopia.The handover was witnessed by Ahmed Shide, Ethiopian State Minister of Finance and Economic Development, and Qian Zhaogang, Economic Counselor at the Chinese Embassy in Ethiopia as well as officials and diplomats from the two countries.The charge d'affairs said the Chinese government has decided to provide Ethiopia with two batches of gratis emergency food aid valued at some 24 million U.S. dollars, as part of humanitarian assistance to the people affected by drought in the Horn of Africa region, about which the international community is concerned much.Months ago, China pledged to provide humanitarian aid to drought affected people in Ethiopia, Kenya and Djibouti.The 2011 drought in the Horn of Africa region has affected livelihoods of over 12 million people in countries of the region including Ethiopia.In this move, China has delivered large quantities of wheat to Ethiopia, and it is put in the central warehouse in Adama town, 90 km away from Addis Ababa, as the first batch of the 8,139.4 tons of wheat and 715.15 tons of rice donated by the government of China, said Ethiopian State Minister of Agriculture.According to the minister, the Chinese government has pledged around 20,000 tons of emergency food valued at 24 million dollars.Wei said China attaches great importance to the agriculture development and the food security in Africa. He said China has engaged itself in various agricultural cooperations with African countries including Ethiopia, in different channels."In the future, besides food assistance, China's agricultural cooperation with Africa will focus on technology demonstration, personnel training, infrastructure construction, promotion of agricultural production and trade, and experience sharing agriculture development," said the Charge d'Affairs.The rest portion and the other batch of the emergency food assistance pledged by China is expected to come in November and December.Wei assured that the rest batches of emergency food aid would come to Ethiopia on schedule. The Ethiopian state minister said the Chinese government is one of those donors that demonstrated its strong friendship with the Ethiopian government and its people by extending appreciable humanitarian support at critical time."The recent donation of 100, 000 U. S. dollars by a Chinese private company, Huajin Group Ltd, for food aid is a manifestation that even private companies join us in our efforts to containing problems associated with such natural disasters," said Wondirad."Despite a steady economic growth achieved these past eight years in Ethiopia that reached an average of 11 percent annually and our continued efforts to maintain and accelerate the momentum through the GTP, we are confronted by climate change induced disasters, of which drought remains the major one," said the minister."While reducing disaster risk and vulnerabilities through development interventions, the government of Ethiopia in collaboration with its partners is taking all the necessary measures towards further enhancing its early warning and response system with the view to reducing potential impacts of disasters, including that of drought enhanced preparedness and provision of timely and appropriate responses."The government of the People's Republic of China has been one of our major development partners supporting us in all these efforts," he added.The state minister commended the Chinese government and its people for standing with Ethiopia shoulder to shoulder at the critical time by donating appreciable size of emergency food aid.

SAN FRANCISCO, Nov. 14 (Xinhua) -- Google is running a secret research lab in the San Francisco Bay Area, where the tech giant invests to experiment and invent what may be world-changing technologies for the future, U.S. media reported on Monday.According to The New York Times, at the lab dubbed Google X, engineers are working at some 100 projects from robots, smart refrigerators to Internet-enabled dinner plates and a "space elevator," a proposed non-rocket space launch structure.An unnamed Google engineer familiar with the lab told the newspaper that it was run as mysteriously as the CIA with two officers, a nondescript one for logistics on the company's Mountain View campus and one for robots in a secret location.Scientists working at the lab include many roboticists and electrical engineers hired from Microsoft, Nokia labs, Stanford, MIT, Carnegie Mellon and New York University. Google's co-founder Sergey Brin is said to be "deeply involved" in Google X.The lab is reportedly headed by Sebastian Thrun, one of the world's top robotics and artificial intelligence experts. He teaches computer science at Stanford University and invented the world's first self-driving car.A Google spokeswoman would not confirm the existence of the lab, but said Google likes to invest in speculative projects."While the possibilities are incredibly exciting, please do keep in mind that the sums involved are very small by comparison to the investments we make in our core businesses," she told The New York Times.

KATHMANDU, Jan. 14 (Xinhua) -- Visiting Chinese Premier Wen Jiabao on Saturday paid an official visit to Nepal, during which China and Nepal issued an eight-point joint statement on boosting bilateral ties and strengthening cooperation in various areas.During the visit, Premier Wen met with Nepalese President Ram Baran Yadav and held talks with the country's Prime Minister Baburam Bhattarai.The leaders of the two countries had an in-depth exchange of views and reached broad understanding on China-Nepal relations as well as on international and regional issues of mutual interest.The two sides agreed that the China-Nepal diplomatic relations, established in 1955 and characterized by equality, harmonious co-existence, ever-lasting friendship and comprehensive cooperation, are of great importance to both nations."Further enhancement of the ties is in accord with the fundamental interests of the two countries and is conducive to peace, stability and development in the region and the world at large," the joint statement said.Firstly, the two sides decided to further promote China-Nepal friendly relations of Comprehensive Partnership of Cooperation Featuring Ever-Lasting Friendship on the basis of the Five Principles of Peaceful Coexistence.Secondly, the two sides agreed to share development experiences and technological advancement, and enhance all round cooperation so as to achieve mutual development and prosperity.The two sides also agreed to maintain the momentum of high-level mutual visits, and have meetings between the leaders on the multilateral occasions.The two nations will also make full use of existing mechanisms including the diplomatic consultations and the China-Nepal Joint Economic and Trade Committee Meeting. The two sides agreed to form a Consultation Mechanism at the level of Ministers for Foreign Affairs.Thirdly, the Nepalese side expressed its firm support for China on its efforts to uphold state sovereignty, national unity and territorial integrity."Nepal does not allow any forces to use its territory for any anti-China or separatist activities," the joint statement said.Fourthly, the two sides agreed to further intensify cooperation in socioeconomic development, promotion of trade and tourism, hydropower, and transportation infrastructure development, as well as other fields on the basis of equality and mutual benefit.At the request of the Nepalese side, the Chinese side assured of increase in the volume of regular grant aid for the implementation of various infrastructure development and other projects.

WASHINGTON, Jan. 1 (Xinhua) -- Twin U.S. spacecraft to study the moon from crust to core put themselves into the lunar orbit on New Year's Eve and New Year's Day, the country's space agency said.The second Gravity Recovery And Interior Laboratory, or GRAIL-B, reached its lunar orbit at 5:43 p.m. EST (2243 GMT) on Sunday, according to the National Aeronautics and Space Administration (NASA).The GRAIL-A started orbiting the moon at 5 p.m. (2200 GMT) Saturday.The insertion maneuvers placed the spacecraft into a near-polar, elliptical orbit with an orbital period of approximately 11.5 hours, NASA said.Over the coming weeks, the GRAIL team will execute a series of burns with each spacecraft to reduce their orbital period to just under two hours. At the start of the science phase in March 2012, the twin GRAILs will be in a near-polar, near-circular orbit with an altitude of about 55 km."NASA greets the new year with a new mission of exploration," Administrator Charles Bolden said in a statement. "The twin GRAIL spacecraft will vastly expand our knowledge of our moon and the evolution of our own planet."During GRAIL's science mission, the two probes will transmit radio signals precisely defining the distance between them. As they fly over areas of greater and lesser gravity caused by visible features such as mountains, craters and masses hidden beneath the lunar surface, the distance between the twin spacecraft will change slightly.Scientists will translate this information into a high-resolution map of the moon's gravitational field.The data will allow scientists to understand what goes on below the lunar surface and increase knowledge of how Earth and its rocky neighbors in the inner solar system developed into the diverse worlds we see today.

来源：资阳报