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CANBERRA, Sept. 24 (Xinhua) -- Australian scientists on Saturday said a satellite due to re-enter Earth poses a negligible threat to life and property on Earth.U.S. National Aeronautics and Space Administration's Upper Atmosphere Research Satellite (UARS), which weighs more than five tons, is expected to re-enter the Earth's atmosphere at 1058 (AEST) on Saturday. The U.S.-based Center for Orbital and Re-entry Debris Studies estimates that re-entry could occur up to seven hours before or after this time.According to Nonathan Nally, a former editor of two space magazines and currently editor of the Australian Space News website, the satellite poses a negligible threat to life and property on Earth."Most of the satellite will burn up on re-entry, with perhaps as many as 26 stronger or harder small pieces surviving to reach the surface," Nally said in a statement."But with the majority of the Earth comprising oceans or uninhabited (or very sparsely populated) remote regions, the chances are overwhelming that any pieces of UARS that survive re- entry will fall harmlessly and never be seen again."Since the spacecraft is no longer powered, U.S. National Aeronautics and Space Administration has no control over where it comes down, but Nally said there is a small chance that debris from the satellite could land in Australia.Debris from SkyLab, another satellite which plunged to Earth, was scattered over parts of Western Australia in 1979. Skylab weighed about 77 tonnes, many times more than the UARS.?Dr Alice Gorman, a lecturer in the Department of Archaeology, specializing in space archaeology, at Flinders University in South Australia, said the UARS satellite re-entry is very reminiscent of Skylab in 1979."There is the same exaggeration of the hazard through the media, public anxiety as the advance warning allows for speculation, and a lack of understanding of what the risks actually are," he said in a statement."Should it land in Australia, we might expect the same rush for souvenirs as we saw with Skylab, as anything that has been in space has a special meaning on Earth."?UARS was launched on 12 September 1991 and decommissioned on 15 December 2005. Its total dry mass is about 5.5 tonnes. UARS is one of the largest NASA satellites to plunge back to Earth uncontrolled in the last 30 years.Since the beginning of the Space Age in the late-1950s, there have been no confirmed reports of an injury resulting from re- entering space objects.? Nor is there a record of significant property damage resulting from a satellite re-entry.

VANCOUVER, Sept. 17 (Xinhua) -- The fourth International Health Qigong Tournament and Exchange kicked off the competition portion of the Vancouver event Saturday to showcase the health benefits of this increasingly popular activity.At a gala opening ceremony in the War Memorial Gymnasium at the University of British Columbia, the biennial tournament was being held outside of China for the first time in an effort to promote the exercise that involves controlled breathing, body postures, movement and mental concentration.The Vancouver tournament has attracted 44 Health Qigong groups from 25 countries and regions, 327 participants in all. The event was last held in Shanghai in 2009.Xiao Min, the All-China Sports Federation vice president, said after three successful events in China, it was important to explore the possibilities of rotating the host venues around the world to boost the exposure of Health Qigong to a wider audience, effectively strengthening the interaction of the Eastern and Western cultures.Calling it "one of the best Chinese traditional sports," Xiao added, "we still have a long way to go in promoting Health Qigong. However, we will try our best to promote it so as to bring health benefits to more people in the world."Sending a message read by Vancouver-based federal politician Wai Young, Canadian Prime Minister Stephen Harper said such a tournament would allow people to "cultivate their interest in and learn more about the benefits of this ancient Chinese healing system.""I would like to commend the organizing committee for putting together a program that promotes cultural exchange and encourages others to embrace Qigong teachings and practices for health, fitness and personal growth. I'm certain that the enthusiasts will make the most of this exciting opportunity and will leave inspired to put what they have learned into practice," wrote Harper, who will be making his second official visit to China later this year.In his speech to the dignitaries and public gathered for the opening ceremony, Liang Shugen, the Chinese Consul General in Vancouver, said it didn't matter who won medals during the competition as everybody participating was a winner."However, it is all the more important that your group build up friendship among the different peoples from different countries, so therefore I wish you all do your best and hope that through this competition you bring the friendship of the Chinese people, of the people from different countries, back to your home country and it is such a course that will be building a harmonious world."With participants representing countries and regions from North America, Europe, Australia, South America, Asia and all over China, which has competitors from 10 provinces, as well as Macau and Hong Kong, the eight-day tournament is providing an extensive overview of what Health Qigong is about.In addition to the two-day competition taking place over the weekend, there is also a referee clinic, a Duan examination and training sessions in the different Health Qigong disciplines, Yi Jinjing, Wu Qinxi, Liu Zijue and Ba Duanjin, among them.Ken Low, who is considered Mr Wushu in Canada, has been instrumental in organizing the Vancouver event. As the president of the Canada International Health Qigong Association he said people need to know about what's involved in the exercise and how it's different from traditional martial arts."It is more than fitness, it's actually mental and physical. It builds inner strength and it builds your, strengthens your joints and muscles and tendons, particularly in your neck area, your shoulders, your spine and your inner organs and your breathing and your focus," he said."So it's not a martial arts, although it is connected somewhat to martial arts because the movements have no self-defence meanings. All the movements are designed to enhance your health."One person who turned to the exercise for health reasons is Diane Hynes. A member of the 12-strong team representing the USA Health Qigong Association, the 50-year-old New Jersey native offers classes in Health Qigong with a cliental of students ranging from five to 84 years.She explained Qigong "helps refine that movement of our eternal energy and makes more as you breathe and move. It has to do with your breath, your ability to relax, bringing your mind to your heart and really moving it out, the energy out to the limbs. That's why it helps with sleep and stress."Hynes, who looked healthy and fit, said she realizes that she is influencing others who want to know what the mother of nine-year-old is doing to look good."And I'm not taking drugs to look well or having surgery," she said, adding the practice is destined to get bigger among westerners as the Baby Boomer generation ages and puts greater emphasis on health. ( "Medication can help for awhile but that takes from you as well, that takes from your energy. This just helps to build energy and move it in your body. Because the thing is, in Chinese medicine, it's about movement, everything's a flow and moving in a circle so it's a give and take."It's a movement and if you are not moving in harmony and you're stuck and stagnant then you are going to be uneasy or diseased or unwell. You're not necessarily sick but you're stuck."

WELLINGTON, June 7 (Xinhua) -- Scientists in New Zealand have developed a new drug to fight previously untreatable hypoxic cancer tumors, which form in areas of the body starved of oxygen.The researchers at the Auckland University have entered an agreement for the clinical development of CEN-209, which was developed over 10 years of research, said a statement from the university Tuesday.CEN-209 was designed to enhance the effectiveness of radiotherapy and chemotherapy in solid hypoxic tumors, which were resistant to standard cancer therapies, said the statement. In lung cancer patients for example, about half of tumors had hypoxic regions.The new drug worked by damaging the DNA of hypoxic cancer cells, while leaving normal, healthy tissues alone.CEN-209 was designed and created by researchers at the university's Auckland Cancer Society Research Centre (ACSRC), using computer models of drug transport within tumors to accurately predict the anti-tumor activity of the drugs."Our computer models of drug transport developed in-house allowed the synthetic chemists to test their design theories and considerably shortened the discovery process," said Associate Professor Michael Hay, who led the ACSRC research chemists."CEN-209 improves markedly on previous agents in this class in terms of its ability to penetrate tumors, and this is reflected by its improved activity in the laboratory, when combined with long or short courses of radiotherapy," said researcher Professor Bill Wilson.Under the agreement between the university's Auckland UniServices Ltd. and California-based Centella Therapeutics, Inc., a subsidiary of Varian Medical Systems, Inc., Centella will have exclusive rights to CEN-209, which it will develop and trial with Cancer Research UK.The work on CEN-209 is the culmination of a program initiated with funding from the U.S. National Cancer Institute, and more recently from the Maurice Wilkins Centre for Biodiscovery. Ongoing preclinical research on CEN-209 and a backup compound was funded by grants from the Auckland Medical Research Foundation, Genesis Oncology Trust and Health Research Council of New Zealand, said the statement.

BRUSSELS, May 31 (Xinhua) -- A deadly outbreak of E.coli linked to contaminated cucumbers is sending Europe on high alert, as death toll from the disease climbed to 16 till Tuesday.So far, 15 people have reportedly died and more than 300 were seriously ill from infections linked to tainted vegetables in Germany. Experts said the numbers are expected to increase in the coming week."We hope the number of cases will go down but we fear it will worsen," said Oliver Grieve, spokesperson with the University Medical Center Schleswig where most German victims are being treated.The German government has identified the pathogen as hemolytic-uremic syndrome (HUS), a serious complication of a type of E. coli known as Shiga toxin-producing E.coli (STEC). The bacteria could damage blood cells and kidneys, and hence cause deaths.A woman in her 50s was confirmed to be the first fatal victim out of Germany by a local hospital on Tuesday. Officials at the hospital in Boras, southwestern Sweden, said the woman, who had recently traveled to Germany, was admitted on May 29.Swedish health authorities already said on Sunday that 36 people, all linked to travel in northern Germany, had been confirmed to have infected with E.coli, whereas cases were also reported in France, the Netherlands, Denmark and Britain.It was the second food scare for European consumers this year. In January, highly toxic dioxin was found in eggs, poultry and pork products across Germany.

RIO DE JANEIRO, Sept. 26 (Xinhua) -- Rio de Janeiro has the highest level of air pollution in Brazil, and is more polluted than many other world metropolis like New York, London and Paris, a World Health Organization (WHO) study said Monday.According to the study, which was carried out in 91 countries and regions, the air in Rio's metropolitan area contains 64 micrograms of fine particulate matter per cubic meter, over three times the upper limit set by the WHO, which is 20 micrograms per cubic meter.Despite being larger, having a bigger population and more vehicles, Sao Paulo's metropolitan area has less air pollution, with 38 micrograms of fine particulate matter per cubic meter.According to the WHO, "the largest contributors to urban outdoor air pollution include motor transport, small-scale manufacturers and other industries, burning of biomass and coal for cooking and heating, as well as coal-fired power plants." The organization said that residential wood and coal burning for heating also help increase air pollution, especially in rural areas in the cold months.The WHO expressed concern over air pollution levels in several cities, as some two million people worldwide die annually from conditions resulting from air pollution."Air pollution is a major environmental health issue, and it is vital that we increase efforts to reduce the health burden it creates," said Dr. Maria Neira, WHO's director for Public Health and Environment.According to the study, Ahwaz, Iran, has the most polluted air in the world, with 372 micrograms of fine particulate matter per cubic meter.