呼市肛门脓肿治疗费用(呼和浩特市区肛肠专业医院) (今日更新中)

As the polar ice caps retreat, polar bears could struggle to survive by the end of this century, a number of university researchers wrote in a study published in the Nature Climate Change journal.The study looked at a number of sub-species of polar bears who live in the arctic and how they have adapted to reduced sea ice from 1979 to 2016. The group of researchers said that all but a few sub-species of polar bears will be able to reproduce and survive given projected conditions by 2100.Polar bears use sea ice to capture seals for food. When sea ice erodes for the summer, polar bears fast. Although polar bears are capable of fasting for months, there are limits to how long the bears can go without food.The researchers examined energy needs of polar bears, and that the amount of time polar bears would fast would lengthen to a point that makes it too challenging to survive and reproduce.While resting female polar bears can generally fast for longer periods of time, reproducing females, males and cubs all require shorter fasting periods, the research found.“Avoiding continued sea-ice decline requires aggressively mitigating greenhouse gas rise,” the researchers wrote, “and our results explicitly describe the costs to polar bears of avoiding that mitigation.”To illustrate how much sea ice is being lost, NOAA is projecting that the arctic could have ice-free summers by 2042.Scientists have long discussed the possibility that polar bears could become nearly extinct by the end of the century. Beyond reducing carbon emissions, proposals have included relocating cubs to areas of the Arctic expected to retain higher levels of sea ice have been proposed. To read the full study, click here. 1714

AUSTIN, Texas (AP) — Authorities say two cranes collided and at least partially collapsed at a construction site in Austin, Texas, injuring at least 22 people. Footage posted by TV station KVUE after Wednesday's accident shows two cranes tangled several stories above a building under construction a few miles north of downtown in a rapidly growing neighborhood that includes residential, retail and office space. TV footage showed one of the crane operators still inside the crane cabin, although it did not appear to be damaged.Austin-Travis County EMS reports that at least 22 people were hurt, including at least seven who were being treated and prepped for transport to a hospital. At least eight ambulances were headed to the scene. 746

Bad news: There is a small chance an asteroid will collide with Earth. The good news: Mankind has more than 115 years to prepare for it. According to a Washington Post report, NASA is preparing for possible tactics to deflect the asteroid Bennu, which will approach Earth Sept. 21, 2135. As of today, NASA rates Bennu's chance of striking Earth at one-in-2,700.The asteroid is roughly 1,600 feet in diameter, and would not be an Earth-ending event if it struck. But that doesn't mean it couldn't cause damage, especially if it struck near a populated area. Bennu is likely dozens of times larger than the object that struck near Chelyabinsk, Russia in 2013, causing hundreds of injuries, and thousands of broken windows. The event caused nearly million in damage to roughly 7,000 buildings. The 2013 event shows that even small objects are capable of causing massive damage. In 2016, NASA launched OSIRIS-REx, which will land on the asteroid and bring back samples. The information gathered could help NASA decide what steps it would take to deflect the asteroid. According to the Washington Post, NASA is working on a plan called the Hypervelocity Asteroid Mitigation Mission for Emergency Response, or HAMMER. NASA's HAMMER plan could involve using a nine-ton bulk impactor to push Bennu out of Earth's path. Another idea would be straight out of the movie "Armageddon," using a nuclear-type device to move the asteroid. A NASA engineer involved in the study told the Washington Post all of these ideas are theoretical. “We’re doing these design studies to prepare ourselves, so if we do find a threatening object, we’re better prepared to deal with it,” Brent W. Barbee, NASA engineer, told the Post.To read the Washington Post's full report, click here.  1855

ATLANTA (AP) — Atlanta police have accused a suspect of felony murder and aggravated assault in a shooting that killed an 8-year-old girl near the site of an earlier police shooting.Police said Wednesday that they issued warrants a day earlier for 19-year-old Julian Conley in the slaying of Secoriea Turner. Conley's attorney, Jackie Patterson, said Conley turned himself in Wednesday. Patterson says Conley was peacefully protesting and witnessed the shooting but did not open fire himself. Secoriea was fatally shot on the Fourth of July while riding in an SUV with her mother and another adult near the Wendy's restaurant where Rayshard Brooks, a 27-year-old Black man, was killed by a white police officer on June 12. 730

As the coronavirus pandemic continues, doctors are learning more about the damage having Covid-19 can do to the body. Two separate studies published recently indicate the coronavirus can harm other organs in the body, including the heart.One of the studies looked at 100 patients in Germany who recently recovered from Covid-19 and found 60 percent of participants had inflammation in the heart. The study used MRI scans to monitor the inflammation, and was published in JAMA Cardiology.The majority of the patients in this study, 67 of them, recovered from the coronavirus at home with severity ranging from asymptomatic to moderate. It compared the MRIs of coronavirus survivors to scans from healthy volunteers.The data showed there was some sort of heart involvement in those who had coronavirus, whether or not they had preexisting conditions or any heart-related symptoms during recovery.“Our findings reveal that significant cardiac involvement occurs independently of the severity of original presentation and persists beyond the period of acute presentation, with no significant trend toward reduction of imaging or serological findings during the recovery period. Our findings may provide an indication of potentially considerable burden of inflammatory disease in large and growing parts of the population and urgently require confirmation in a larger cohort,” the researchers noted in conclusion.A second study, also published in JAMA Cardiology, found coronavirus could be found in the heart tissue of patients who died.The study looked at data from 39 autopsy cases in Germany in early April. The patients were aged 78 to 89, had tested positive for Covid-19 and there were results of heart tissue analysis in their autopsies.In 16 of the 39 cases, there was a large “virus load” of coronavirus found in the heart tissue, another eight had a coronavirus presence in the tissue.The sample of autopsy cases was small and the "elderly age of the patients might have influenced the results," the researchers wrote. More research is needed whether similar findings would emerge among a younger group of patients."Taken together the studies support that SARS-CoV-2 does not have to cause clinical myocarditis in order to find the virus in large numbers and the inflammatory response in myocardial tissue. In other words, one can have no or mild symptoms of heart involvement in order to actually cause damage," said Dr. Dave Montgomery, who was not involved in the studies, in a statement to CNN.Dr. Clyde Yancy of Northwestern University Feinberg School of Medicine and Dr. Gregg Fonarow of the University of California, Los Angeles, co-authored an editorial that accompanied the two new studies in the journal JAMA Cardiology called ‘Coronavirus Disease 2019 (COVID-19) and the Heart—Is Heart Failure the Next Chapter?”“We see the plot thickening and we are inclined to raise a new and very evident concern that cardiomyopathy and heart failure related to COVID-19 may potentially evolve as the natural history of this infection becomes clearer,” they write. 3076

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