济南治疗肾虚阳痿(济南阳痿什么调理) (今日更新中)

BEIJING, Oct. 26 (Xinhuanet) -- The question, why the first documented supernova was super-sized and grew so fast, has puzzled astronomers for centuries. Now it is solved by US researchers.The supernova, an exploded star, was observed in 185 A.D. and documented as a mysterious "guest star" by Chinese astronomers. It was visible for eight months.Scientists later found the supernova, 8,000 light years away, was a bigger-than-expected supernova remnant. BBC reported that if the infrared light it emits could be seen by human eyes, it would appear to be as large as the full Moon in the sky.Through observations in space telescopes, researchers of a latest study revealed that the explosion took place in a cavity in space, which allowed the star's remains to travel out much faster and farther. The study was published online in the Astrophysical Journal Monday.The supernova was "two to three times bigger than we would expect for a supernova that was witnessed exploding nearly 2,000 years ago. Now, we've been able to finally pinpoint the cause," stated Brian Williams, lead author of the study and an astronomer at North Carolina State University in Raleigh.

BEIJING, Oct. 13 (Xinhuanet) -- A new study finds that ginger may decrease the risk of colon cancer through diminishing the inflammation in the gut, according to media reports Thursday.Prior researches have found that chronicle inflammation in the gut is related to colon cancer, suggesting easing inflammation in intestines might reduce the risk of the cancer, said Suzanna M. Zick, lead author of the study published online in Cancer Prevention Research. Zick, also a naturopathic physician and research associate professor at University of Michigan Medical Center, and her colleagues, assigned 30 volunteers to take pills containing two grams of either placebo powder or ginger root extract, equivalent to about two tablespoons of ground-up raw ginger root.And they recorded the inflammations in the participants' intestines before and after the test period.The researchers found that participants taking ginger pills had 28 percent less inflammation in their intestines after the test. But no difference was found in those who took placebo.The findings are promising, but the researchers are not yet recommending people start taking more ginger at meal times. The study only involved 30 participants, so it is just a preliminary study. Zick said they hope to launch a larger study in the future, according to USA Today.

WASHINGTON, Oct. 13 (Xinhua) -- U.S. researchers have corrected sickle cell disease in adult laboratory mice that had been bred to have the inherited blood disorder by activating production of a special blood component, according to a study published online Thursday in the journal Science.Sickle cell disease results from an abnormality in hemoglobin, the protein found in red blood cells that is responsible for transporting oxygen throughout the body. People living with sickle cell disease have two copies of an altered gene that produces sickle hemoglobin instead of normal adult hemoglobin. Sickle hemoglobin changes shape after releasing its oxygen, causing the red blood cell to become stiff, misshapen and sticky, and slowing blood flow to tissues. This process damages organs and causes pain.The study tested a new approach to increasing the production of a third form of hemoglobin -- fetal hemoglobin. Production of fetal hemoglobin predominates before birth, but turns off thereafter as adult hemoglobin production takes over. People with sickle cell disease are unable to make normal adult hemoglobin, and instead make sickle hemoglobin starting in infancy.An elevated level of fetal hemoglobin within the red blood cell reduces the tendency of sickle hemoglobin to change the shape of red blood cells. Considerable research has shown that the drug hydroxyurea increases production of fetal hemoglobin and reduces the number of pain crises and other complications of sickle cell disease in adults and children. However, not all patients respond well to hydroxyurea, and adverse side effects are a concern.The current study explores a more targeted approach to increasing fetal hemoglobin production. It builds upon earlier studies that discovered a protein called BCL11A normally suppresses the production of fetal hemoglobin soon after birth. The researchers viewed the BCL11A protein as a target for therapy and decided to see what would happen if they blocked production of the protein.The paper details how the research team silenced the mouse gene that produces the BCL11A protein in mice with sickle cell disease. Silencing the gene turned off production of the BCL11A protein and allowed the adult mice to continue to produce fetal hemoglobin. It appears to have eliminated disease symptoms without affecting other aspects of blood production."This discovery provides an important new target for future therapies in people with sickle cell disease," said Susan Shurin, acting director of the U.S. National Heart, Lung, and Blood Institute, which co-funded the study. "More work is needed before it will be possible to test such therapies in people, but this study demonstrates that the approach works in principle."Approximately 100,000 Americans live with sickle cell disease. It is most prevalent in people of African, Hispanic, Mediterranean, and Middle Eastern descent. There is no widely available cure for sickle cell disease. Bone marrow transplants have cured some patients, but the treatment is not without risk and most patients do not have relatives who can donate compatible and healthy bone marrow to them.

PARIS, Oct. 15 (Xinhua) -- Faced with new problems such as sovereign debt and downward risks, all countries should work together to enhance coordination on macroeconomic policies to guard economic growth and financial stability with respective effort, Chinese delegates said Saturday here at the G20 Financial Ministers Meeting.The global economy is challenged by new difficulties which require all countries to join hands in fighting all sorts of protectionism either in trade or in investment, according to a statement issued by the Chinese delegation led by Chinese Financial Minister Xie Xuren and Central Bank Governor Zhou Xiaochuan.China suggested that leading developed countries should ensure economic recovery and financial stability in short term, while in the medium term enhance fiscal solidarity, accelerate structural reform and refrain the negative impact of macroeconomic policies.Meanwhile, China also stressed that the emerging countries should make their own contribution to tackle the problems. "The emerging markets should promptly take flexible and effective macroeconomic measures in order to control slowdown and tackle with impacts from inflation and capital flows," the statement said.Emerging economies "should also quicken their pace on structural reform in a bid to realize stable and faster growth," the statement added.During the two-day meeting, G20 financial leaders gathering in Paris welcomed the progress the Europe made on the eurozone debt issue on Saturday, but meanwhile expected the euro area to rely more on itself with bigger bailout fund to avoid contagion.

BEIJING, Dec. 4 (Xinhua) -- Chinese President Hu Jintao sent a message to Venezuelan President Hugo Chavez and Chilean President Sebastian Pinera on Friday to congratulate the founding of the Community of Latin American and Caribbean States (CELAC).In his message, Hu said that the establishment of CELAC is a major milestone in regional integration and that China appreciates the positive role of Latin American and Caribbean countries in international and regional affairs.China believes that the establishment of the community will make important contributions to unity and coordination in the region as well as joint efforts to counter global challenges, Hu said.China and Latin America are geographically apart, but their peoples enjoy traditional friendship, Hu said.In the 21st century, relations between China and Latin America have seen all-round and fast development with the expansion of mutually beneficial cooperation, Hu said.China has always treated its relations with Latin America from a strategic perspective and China is willing to work with CELAC and other countries in the region to build and develop a comprehensive cooperative partnership of mutual benefit and common development through the strengthening of dialogue, communication and cooperation, said Hu.The idea of CELAC was initiated in February 2010 at a regional summit in the Mexican resort of Cancun. The new grouping represents all countries in the Americas except Canada and the United States.

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