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NEW YORK, Oct. 3 (Xinhua) -- For the 34-year-old Alexis Steinman, Oct. 3 would have been a great day, because her father Ralph Steinman was announced winner of the 2011 Nobel Prize in Physiology or Medicine.But as she talked to Xinhua at the Rockefeller University where his father worked, she said the day was rather "bittersweet"."This is the moment, but my Dad was not here," said Alexis, trying to hold her tears.The Canadian-born cell biologist Ralph Steinman died of pancreatic cancer on Friday at the age of 68, three days before he was announced the joint winner along with Prof. Bruce Beutler and Prof. Jules Hoffman for the Nobel Prize in Physiology or Medicine."We even talked about the Nobel Prize days before his death," Alexis added."We were like 'OK Dad, I know things aren't going well but the Nobel, they are going to announce it next Monday'. And he was like 'I know I have got to hold out for that. They don't give it to you if you have passed away,'" she said."It's really impossible to describe how our family is feeling right now. We're devastated to have lost Ralph,"Steinman' s son Adam Steinman told reporters at the press conference at Rockefeller University. "We're so incredibly proud of Dad for receiving this wonderful honor ... We know he will live on through his scientific contributions," he said.Rockefeller University president Marc Tessier-Lavigne told reporters during Monday's press conference that the university only heard of Steinman's death from the family about half an hour after news of the Nobel prize came out from Sweden."We are all deeply saddened by his death, " said Tessier- Lavigne , adding that Steinman had been treating himself with a groundbreaking therapy based on his research into the body's immune system.He said Steinman's research has laid the foundation for numerous discoveries in the critically important field of immunology, and it has led to innovative new approaches in how people treat cancer, infectious diseases and disorders of the immune system.Steinman's first student and close colleague Michel Nussenzweig told the press conference packed with reporters, students and professors that "one of the interesting things about Ralph and his discovery is that no one believes it for a really long time.""What was amazing about Ralph was that he just knew that, even though nobody else believed it, this was really important, and he persisted, and finally after a very long time, everyone just found out it was true," Nussenzweig said."Ralph worked until last week. His dream was to use his discovery to make vaccines and it is a dream that is pretty close, and we are all continuing to work to make that come true," he added.The Nobel Foundation made a statement after learning Steinman's death, saying that the decision to award the prize to the Canadian scientist would remain unchanged despite his death, and the prize money will be transferred to his estate.

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. "

BEIJING, Sept. 30 (Xinhuanet) -- The number of children being prescribed stimulants to treat attention deficit hyperactivity disorder (ADHD) has been steadily rising in the U.S. since 1996, researchers found.The finding was contained in a report released Wednesday in the U.S. medical journal Psychiatry.About 7.8 percent of children aged 4 to 17 in 2003 were diagnosed with ADHD, compared to 9.5 percent in 2007, according to the data gathered from the Health Resources and Services Administration's National Survey of Children's Health.And compared to 0.6 percent in 1987, 2.9 percent of children under 19 in 2002 have been prescribed stimulants, the report said.The finding raises the researchers' concern as stimulants have side effects such as decreased appetite, leeplessness and even heart-related damage, the report warned."Stimulant medications work well to control ADHD symptoms, but they are only one method of treatment for the condition. Experts estimate that about 60 percent of children with ADHD are treated with medication." says researcher Benedetto Vitiello, MD, of the U.S. National Institute of Mental Health."There is ongoing concern that these drugs may not be used properly, especially when they are prescribed to college students or children in their late adolescence who are more in charge of their care and may not be using the medications as prescribed." he added.

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.

SAN FRANCISCO, Dec. 13 (Xinhua) -- A Nokia executive has claimed that the youth of today are fed up with the iPhone and baffled by Android, U.S. media reported on Tuesday."What we see is that youth are pretty much fed up with iPhones. Everyone has the iPhone. Also, many are not happy with the complexity of Android and the lack of security," said Niels Munksgaard, director of portfolio, product marketing and sales at Nokia entertainment global, in an exclusive interview with technology news site Pocket-lint.He added that the youth today want to try something new and are turning to the Windows phone platform.Many tech bloggers and industry critics said Nokia, the once leader who is eager for a comeback in the mobile industry, should not trash-talk its competitors, noting that it should focus on breakthroughs like design, ecosystem of app developers to get back its place in the competition.Nokia has placed most of its bets on Windows phone platform as it introduced Lumia 800 and Lumia 710 in London in late October. It is also reportedly testing the 4G version of Lumia 800 in the United States.