济南怎样引起的痛风病(济南痛风怎麽治疗) (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

As states across the country grapple with an increase in coronavirus cases and a huge demand for tests, many businesses are looking for other ways to get more mileage out of their supply chain.Like with anything else, supply and demand is a constant struggle. In this unprecedented era, the demand for things like coronavirus tests is so large that public health departments don't have a choice but to figure out ways to make our supplies last. Several states are examining pooled testing. California's Public Health Department says it's to "better leverage testing resources."Pooling is something that blood banks have used for decades to keep their blood supply safe. Dr. Claudia Cohn is the Chief Medical Officer of the AABB, formerly known as the American Association of Blood Banks.“If you have 100 people that need to be tested and if you test each of them, you’ll do 100 tests. If you find that your test is sensitive enough that you can pool together 20 samples at the same time, instead of having 100 tests, you can have five pools of 20,” Dr. Cohn said.Now, if one of those five pools is positive, then Dr. Cohn says, "You’ll need to break it out and test each of those separately. So, let’s say you have one positive person in a pool of 100 people, you either do 100 tests and find one positive or you do five pools of 20, four of those pools will be negative, so you’ve done 4 pools and covered 80 people."The test works by taking a tiny sample from each person who was tested.“When you take a swab from everyone’s nose, you isolate the DNA from that swab,” Dr. Cohn said about the PCR test, which is generally a nose swab. “It’s not a lot, it’s a small amount but it’s enough. Because these tests are very, very sensitive.”Those tests are so sensitive, and they have to be, that pooling can really only work if the test can handle, as in detect, multiple samples at once. The FDA mandates that.“The FDA is quite demanding as they should be in terms of making sure tests work well and are safe,” Dr. Cohn said.And Dr. Cohn says, pooling wouldn't work in an area where there's a large outbreak, which means a large number of people would test positive regardless of pooling. In the blood world, this strategy has been perfected.“You are taking 100 samples and taking a drop from each sample and putting it together,” Dr. Cohn said. “You are testing every single person who comes through. In the blood world safety is before everything."Blood banks test for HIV, Hepatitis C and B and well as COVID-19 antibodies, according to the American Red Cross. And, as this pandemic moves through our communities, Dr. Cohn says our blood supply needs to remain strong.“After that initial spike, it went down again and that was okay because elective surgery had been canceled, so the demand for blood had gone down as well so for a while we were at a good balance of demand and supply. But then elective surgeries opened up and hospitals went back to full service and we’re in a shortage again,” Dr. Cohn said. 3017

ATLANTA — Typically voters in other states don't typically pay attention to elections in other states. But that is not the case with the Jan. 5 Georgia runoff with control of the United States Senate on the line. WHAT'S AT STAKE Two Senate seats are up for grabs. Currently, Republicans control both of them and if they win reelection in one of them they will control the Senate for the next two years. If Democrats sweep both races, Democrats will control the Senate for two years. The outcome will determine how much political power President-elect Joe Biden has. Having control of the Senate would give Biden more ability to confirm nominees and pass progressive bills, which includes COVID economic relief. EARLY VOTING On Monday, early voting got underway with thousands casting their ballot in Georgia. 816

BALTIMORE - Food safety experts are warning parents to be mindful when packing perishables like sandwiches and yogurts in your child's lunch.Tanya Brown with the United States Department of Agriculture (USDA) said you're looking at a two-hour window before those brown bag lunches become breeding grounds for bacteria.“You should not put perishable items like bologna sandwiches, turkey sandwiches, cheese or yogurt in a brown paper bag and send a child to school with it,” Brown said.Foods can hit the "danger zone," or temperatures between 40-140 degrees Fahrenheit, when it’s left out of refrigeration over two hours. After four hours, the food item should be tossed.“You want to make sure you put them in an insulated lunch bag with at least two cold sources and those two cold sources could be a frozen water bottle or frozen juice packs or gel packs in there. So, you want to put those perishable items in there and make sure the child does not open the bag and keep opening and closing the bag before lunchtime,” said Brown.If you're sending them with something hot, use a thermos, and warm it up first.“The best way to prepare it is to pour boiling hot water into the thermos first, then discard the hot water and then put the hot soup or stew in there. Make sure it's at 165 degrees Fahrenheit,” Brown said.However, the leading cause of sickness is poor hand washing. Brown said this is an easy problem to solve:“Oftentimes, children don't get an opportunity to wash their hands before they go to lunch and just to trigger their memory put a moist toilette in there or some hand sanitizer to remind them before they start to eat their lunch,” she said.Click here for more information on the danger zone and safe handling of food. 1751

ATLANTA (AP) — The shooting death of an 8-year-old girl has prompted a ,000 reward for information as authorities in Atlanta search for at least two people who opened fire on the car she was riding in. Police identified the girl as Secoriea Turner, and say she was in a car whose driver tried to get through an illegal barricade placed near Wendy's restaurant where Rayshard Brooks was killed by a white police officer on June 12. In a news conference on Sunday, Atlanta Mayor Keisha Lance Bottoms said "enough is enough" and asked for the public's help in identifying the shooter. 592

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