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WASHINGTON, Nov. 10 (Xinhua) -- NASA's car-sized Mars rover Curiosity, which will examine one of the most intriguing areas on the Red Planet, is in final preparations for a launch from Florida 's Space Coast at 10:25 a.m. EST (15:25 GMT) on Nov. 25, the U.S. space agency announced on Thursday.Curiosity is about twice as long and more than five times as heavy as any previous Mars rover. Its 10 science instruments include two for ingesting and analyzing samples of powdered rock delivered by the rover's robotic arm. It is now sitting atop an Atlas V rocket awaiting liftoff from Cape Canaveral Air Force Station."Preparations are on track for launching at our first opportunity," said Pete Theisinger, Mars Science Laboratory project manager at NASA's Jet Propulsion Laboratory. "If weather or other factors prevent launching then, we have more opportunities through Dec. 18."Scheduled to land on the Mars in Aug. 2012, the one-ton rover will examine Gale Crater during a nearly two-year prime mission. Curiosity will land near the base of a layered mountain three miles (five kilometers) high inside the crater. The rover will investigate whether environmental conditions ever have been favorable for development of microbial life and preserved evidence of those conditions.

ACCRA, Dec. 1 (Xinhua) -- The Ghanaian government allayed the fears of many here on Thursday that it would provide funding for the treatment of persons living with HIV/AIDS in the country.Vice President John Dramani Mahama affirmed this when he addressed a ceremony to mark this year's World AIDS Day at Obuasi, near Kumasi, 270 km north of the capital Accra.Mahama said should the Global Fund pull out of supporting the country, the government would partner with development partners to raise the 5.8 million U. S. dollars needed yearly for the treatment of HIV/AIDS patients."Government will work together with the Ghana AIDS Commission (GAC) and donor partners to ensure that people living with HIV/ AIDS have access to antiretroviral drugs."The Presidency is with you, and whatever we will do to win the fight against HIV/AIDS shall be done," Mahama said.Ghana's HIV/AIDS infection rate, according to official figures, has dropped from 3 percent to the current 1.5 percent, albeit with pockets of higher rates of infection among some populations in the country.Mahama called for more innovativeness in mobilizing resources to avoid the danger of retrogression.Director-General of the GAC Angela El-Adas announced that the Ministry of Health had pledged 2.5 million Ghana cedis (1.66 million dollars) out of the 5.8 million dollars needed for next year.Meanwhile, in the capital, the Ghana Network of Persons Living with HIV and AIDS (NAP+ GHANA) joined persons living with HIV (PLHIV) globally on Thursday to commemorate this year's World AIDS Day."We stand united with our fellow PLHIV and the global HIV and AIDS community by fully supporting the vision of 'Getting to Zero', " Charity Owusu Danso, vice president of NAP+ Ghana, said in a message here.Established in 2005, NAP+GHANA is a network of member associations of persons living with HIV/AIDS in Ghana to represent the views, hopes and aspirations of PLHIV across the country."We are extremely worried. Everyday, we receive reports from PLHIV across the country that anti-retroviral drugs are out of stock or that hospitals or clinics won't give HIV treatment to new patients because there aren't even enough drugs for existing patients, " the statement said.

WASHINGTON, Jan. 19 (Xinhua) -- New research published this week in Nature Medicine indicates that targeted drugs such as gefitinib might more effectively treat non-small cell lung cancer if they could be combined with agents that block certain microRNAs.The study, led by investigators with the Ohio State University Comprehensive Cancer Center, shows that overexpression of two genes called MET and EGFR causes the deregulation of six microRNAs, and that this deregulation leads to gefitinib resistance.The findings support the development of agents that restore the levels of these microRNAs. It offers a new strategy for treating non-small cell lung cancer, which is responsible for about 85 percent of the 221,000 lung-cancer cases and 157,000 deaths that occur annually in the United States. It also suggests that measuring the expression levels of certain microRNAs -- those controlled by the MET gene -- might predict which lung-cancer cases are likely to be resistant to gefitinib.Epidermal growth factor receptor (EGFR) is frequently overexpressed in non-small cell lung cancer, and this leads to uncontrolled cell proliferation. Gefitinib selectively inhibits EGFR activation and triggers cancer cells to self-destruct by apoptosis. However, non-small cell lung cancer cells inevitably develop resistance to the drug. The study reveals how this resistance occurs."Our findings suggest that gefitinib resistance that is caused by MET overexpression is at least partly due to miRNA deregulation, " says principal investigator Carlo Croce.

XI'AN, Nov. 20 (Xinhua) -- Fish in Hongjiannao Lake, China's largest desert freshwater lake, are teetering on the verge of extinction, according to local fishery authorities."The fish in Hongjiannao have nearly vanished," said Li Weiping, the head of a fish monitoring station in northwest China's Shaanxi province.As the lake continues to shrink, its water has become more salty and its pH reading has reached 9.6, while the maximum reading suitable for fish is 8.5, according to Li.The lake has gradually lost the water that it used to get from underground streams and rivers, Li said, adding that excessive coal mining around the lake has changed the way water flows underground. Two reservoirs have been built on two rivers near the upper reaches of the lake, preventing river water from flowing into the lake.The lake's water level has plunged by 20 to 30 centimeters every year. Its total surface area has been reduced to 41.8 square km, down from 67 km in 1996.

JIUQUAN, Oct. 26 (Xinhua) -- China will launch the spacecraft Shenzhou-8 in early November at the Jiuquan Satellite Launch Center in northwest deseart area.The unmanned spacecraft is expected to perform China's first space docking with Tiangong-1, or Heavenly Palace-1, a space lab module that was launched in September from the same launch center.The spacecraft and its carrier rocket, an upgraded Long March-2F, were transferred on Wednesday morning on a 20-meter-wide railway to the launch pad.The launch pad is 1,500 meters away from the assembling and testing center. It took nearly two hours to complete the transfer.Technicians completed testing on the assembling of Shenzhou-8 and the rocket after they were delivered to the launch center at the end of August, said Lu Jinrong, the launch center's chief engineer.In the next few days, the launch center will continue testing the spacecraft and the rocket, and inject propellent before the final launch in early November, Lu said.The assembling, testing and transferring of the spacecraft and rocket were all conducted while they were vertical.Shenzhou-8 is capable of docking with the spacecraft Tiangong-1 in both manual and automatic modes.The Tiangong-1 space lab module is functioning smoothly in the orbit, and all equipment and experiments are going well, according to Lu. The module is ready for the docking task, Lu said.