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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.

WASHINGTON, Dec. 5 (Xinhua) -- A recent study found that low vitamin D levels are significantly more prevalent in obese children and are associated with risk factors for type 2 diabetes. This study was accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism.High rates of vitamin D deficiency have been found in obese populations and past studies have linked low vitamin D levels to cardiovascular disease and type 2 diabetes. But the mechanisms by which obesity and its comorbidities are related to vitamin D deficiency are not fully known.This new study examined associations between vitamin D levels and dietary habits in obese children, and tested whether there were correlations between vitamin D levels and markers of abnormal glucose metabolism and blood pressure.In this study, researchers measured vitamin D levels, blood sugar levels, serum insulin, body mass index (BMI) and blood pressure in 411 obese subjects and 87 control non-overweight subjects. Study participants were also asked to provide dietary information including daily intake of soda, juice and milk, average daily fruit and vegetable intake, and whether or not they routinely skipped breakfast. BMI is a measurement of body fat calculated from weight and height."Our study found that obese children with lower vitamin D levels had higher degrees of insulin resistance," said Micah Olson, of The University of Texas Southwestern Medical Center in Dallas and lead author of the study. "Although our study cannot prove causation, it does suggest that low vitamin D levels may play a role in the development of type 2 diabetes.""Poor dietary habits such as skipping breakfast and increased soda and juice intake were associated with the lower vitamin D levels seen in obese children," said Olson. "Future studies are needed to determine the clinical significance of lower vitamin D levels in obese children ... and whether treatment with vitamin D can improve primary clinical endpoints such as insulin resistance. "

OTTAWA, Nov. 21 (Xinhua) -- The leader of World Health Organization (WHO) Margaret Chan said in Canada on Monday that countries must make the health of women and children their highest priority.Speaking at a luncheon in Gatineau, Quebec, Chan said that maternal and infant health is the most pressing public health issue in the world.She made the remarks just hours after WHO announced Chan was the only candidate for the position on WHO director-general when Chan's appointment expires next year.An executive board meeting in Geneva between Jan. 16 and 23 will decide whether to put the name forward to the WHO Assembly in May, which would make the final decision regarding the appointment.Chan, a former health chief in China's Hong Kong, was elected director-general of the WHO in Nov. 2006.Before her tenure with WHO, Chan was head of public health in Hong Kong, where she managed the city's response to the world's first outbreak of the deadly H5N1 bird flu virus and an outbreak of Severe Acute Respiratory Syndrome (SARS).Speaking in Gatineau, Chan, who earned her medical degree in Canada, said that she never expected to rise to such a lofty position."I just wanted to be a doctor. I just wanted to take care of women and children. When I was studying in Canada, I thought I would get married and have children. I never guessed I'd do anything like head the World Health Organization," she said.She said that she will continue to focus the WHO's attention on mothers and young children.Chan said that it's difficult to know how many mothers and young children die of preventable diseases, since more than 80 countries don't keep accurate death records, but she said that millions of children under five years of age are dying.Millions more are growing up physically and mentally stunted because of poor nutrition and medical care, she added."Without proper nutrition, the stunting we are seeing is horrific," she said. Unless babies have good food, including being breast-fed as infants, they grow up physically and mentally under-developed, Chan said."The first few years of a child's life are make or break," she said.Chan and the WHO held a meeting of the Expert Panel on Maternal and Child Health in Canada from Nov. 18 to Nov. 21. The panel was established by the United Nations Commission on Information and Accountability for Women's and Children's Health Report. At the invitation of the WHO, the Commission was co-chaired by Canada's Prime Minister Stephen Harper and the President of Tanzania, Dr. Jakaya Kikwete.Chan says she's hopeful funding from developed nations will continue to expand, despite the debt crisis facing many of them. The situation resembles the 1970s, with spikes in energy and food prices along with cuts to national budgets to restrain debt.Chan said she is relieved the International Monetary Fund will not press for public health cuts in countries that are struggling with debt.Beverley J. Oda, Minister of International Cooperation who is responsible for Canada's official aid affairs, delivered remarks at the luncheon on improving the health of children and mothers locally and globally."I am particularly proud of the strong partnership between the WHO and Canada in advancing global health, and working towards improvements that will help us achieve our shared goals," she said.Last Friday, Oda announced 25 new initiatives to further Canada 's support to 23 projects in Africa concerning Children and Youth, Food Security and Sustainable Economic Growth.Seven of these are multi-country projects supporting efforts to prevent the mother-to-child transmission of HIV/AIDS, further improving child health, or increasing the capacity of African Regional Technical Centres. The others are targeted to support work in a range of individual African countries by working with Canadian, international and African-based organizations.

BEIJING, Jan. 24 (Xinhua) -- China's meteorological authority said Tuesday that the country's northern regions will continue to have sunny weather for the coming 24 hours, while the south will see subdued rain and snow.Temperatures in most parts of the country are expected to rebound slightly, the National Meteorological Center said in a statement on its website.But the lowest temperatures in the areas south of the Yangtze River will remain around zero degree Celsius, the center said.Meanwhile, rain and snow will subdue in most parts of the southern regions over the next three days, although freezing rain is forecast to hit Guizhou and Hunan provinces, according to the statement.

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