尿结石卡在尿道口怎么办重庆(重庆怎么解决结石) (今日更新中)

CANBERRA, Aug. 17 (Xinhua) -- Australian scientist on Wednesday said his international research team has discovered the trick on how butterfly learn to change its wing pattern to avoid being eaten by birds.The Amazonian butterfly, Heliconius numata, has learnt to carry out a single genetic switch to alter its wing pattern so it appears to be another bad-tasting butterfly that birds will avoid.Dr. Siu Fai (Ronald) Lee from the Department of Genetics and Bio21 Institute at Australia's University of Melbourne was part of the international research team, which was led by scientists at Centre National de la Recherche Scientifique (CNRS) and the University of Exeter in United Kingdom.Dr. Lee said the historical mystery had puzzled researchers for decades."Charles Darwin was puzzled by how butterflies evolved such similar patterns of warning coloration," Dr. Siu Fai (Ronald) Lee from the Department of Genetics and Bio21 Institute at the University of Melbourne told Western Australia Today."We have now solved this mystery, identifying the region of chromosome responsible for changing wing pattern."He said the research team identified a genetic switch known as a supergene, which allowed the butterfly to morph into several different forms, allowing one species to mimic another."It is amazing that by changing just one small region of the chromosomes, the butterfly is able to fool its predators by mimicking a range of different butterflies that taste bad," he said."The butterflies rearrange this supergene DNA like a small pack of cards, and the result is new wing patterns. It means that butterflies look completely different but have the same DNA."There are other butterflies doing similar tricks, but this is the most elegant one."I was just fascinated by how elegant they were."He said the discovery proves that small chromosomal changes can preserve successful gene combinations, and thus help a species to adapt.The findings of the study are published on August 14 in the international journal Nature.

BEIJING, Sept. 11 (Xinhua) -- Despite a series of disasters, Chinese people tend to believe that the moon is still round and bright in the Mid-autumn Festival.Falling on Monday, the 15th day of the eighth month in the Chinese calendar, it is an important Chinese holiday, next only to the Spring Festival, and a chance for family reunion under the full moon, a symbol for happiness and prosperity.A staff worker shows newly-cooked moon cakes during a Mid-autumn festival celebration activity held in Tianjin, north China, Sept. 11, 2011. Some 100 children from Tianjin and southeast China's Taiwan attended the activity on Sunday.FAMILY REUNIONIn the railway station of Nanjing, capital city of east China's Jiangsu Province, passengers lined in long queues while waiting for their trains on Saturday.Although the three-day holiday seemed too short for a long trip, Xiao Liang carried several bags with him. "I bought wine for my dad, boiled salted duck for my mom, and health products for my grand parents," the young man beamed.In the southwestern Guangxi Zhuang Autonomous Region, Li Yukun didn't believe that she could reunite with her son for holiday. In fact, she never thought she could see the three-year-old boy again.Two years ago, Xiao Wei (pseudonym) from the Dalun village of the Beiliu city was kidnapped. His parents were desperate. "On special occasions like the Mid-autumn Festival, we shed tears while missing him," Li said.Police finally managed to get clues that a similar boy was adopted in the neighboring Guangdong Province.Li prepared for a feast with policemen to celebrate reunion with Xiao Wei.Since a campaign was launched to rescue trafficked children in Guangxi in 2009, 339 children were saved, half of whom had been sent back and could reunite with their parents in this festival.In Sichuan, 10 prisoners with good records in jail were given an opportunity to go back home for the holiday."In the past I could only receive greetings from my relatives behind the bars," a woman surnamed Chen said. "This year, my dream for home finally came true."Meanwhile, 171 prisoners had their jail terms shortened so that they could be released before the Mid-autumn Festival.

BERLIN, June 6 (Xinhua) -- The German authorities said on Monday that Germany's first sample tests of the allegedly contaminated bean sprouts have found no E. coli strains that have sickened more than 2,000 people in Europe.According to a statement issued by the Agriculture Ministry of the Lower-Saxony state, 23 of 40 samples concerning the suspected sprouts from a market garden in the state have tested negative, and further tests are still pending."Based on the initial findings in tests of some of the samples, especially the seeds, we assume that intensive analytical efforts are needed to prove that the suspected pathogen is really there," the statement said.Beansprouts and salad sprouts are seen in this picture illustration taken in Berlin June 6, 2011.  The German authorities said on Monday that Germany's first sample tests of the allegedly contaminated bean sprouts have found no E. coli strains that have sickened more than 2,000 people in EuropeLower-Saxony's Agriculture Minister Gert Lindemann said Sunday that a market garden in the rural district of Uelzen had provided a connection "involving all the main outbreaks" of the disease.Restaurants and food outlets of almost all E. coli-affected areas had received shipments of sprouts directly or indirectly from the company, state officials said.The German authorities have been racing to track down the source of the pathogen since the outbreak, which has infected people in 12 countries, all of whom had once traveled in northern Germany.More than 600 of those infected have developed Hemolytic Uremic Syndrome, a potentially deadly complication attacking the kidneys.The E. coli source was first thought to be cucumbers from Spain, which has caused huge loses for Spain farmers. However, this conclusion was overthrown by laboratory tests in Hamburg later.

MOSCOW, Aug. 7 (Xinhua) -- A state of emergency has been imposed in a district in the Krasnodar Region in south Russia amid an out break of the African swine fever, the regional emergencies center said on Sunday.The emergencies center told local reporters that the African swine fever virus (ASFV) was found in a private farm where 15 pigs died of the disease, but the source of the infection is still unclear.Local authorities said some 12,000 pigs in and around the Krylovskaya village, some three km away from the private farm, are being culled, 50 of which have already died of the ASFV in recent days.In April, the regional emergencies has temporarily declared a state of emergency in the Labinsky district in the region, as the ASFV was found at a livestock farm. 85 pigs were culled at the farm.

来源：资阳报