在昌吉一般妇科检查多少钱(昌吉怎样的包皮需要割) (今日更新中)

As computers, tablets and cellphones have become a growing part of our lives, the exposure to blue light emitted from these devices increases. While blue light exposure has been known to cause strain in eyes, Oregon State University researchers studied the effect of blue light exposure on aging. Based on to their findings, exposure to blue light could cause aging to accelerate. For their study, researchers used common fruit flies and exposed them to 12 hours of blue LED light and 12 hours of darkness. To compare, researchers kept a group of flies in total darkness, as well as a group of flies that were exposed to light that had the blue wavelengths filtered out. The researchers said they chose fruit flies because their cellular and developmental mechanisms are similar to humans.The researchers said that flies exposed to blue LED light sustained damage to their retinal cells and brain neurons and had impaired locomotion. Even more stunning, some of the flies, which exhibited some brain damage, were mutants that did not develop eyes."The fact that the light was accelerating aging in the flies was very surprising to us at first,” said Jaga Giebultowicz, a professor of integrative biology at Oregon State. “We’d measured expression of some genes in old flies, and found that stress-response, protective genes were expressed if flies were kept in light. "We hypothesized that light was regulating those genes. Then we started asking, 'what is it in the light that is harmful to them,' and we looked at the spectrum of light. It was very clear cut that although light without blue slightly shortened their lifespan, just blue light alone shortened their lifespan very dramatically.” 1708

California's Joshua Tree National Park on Wednesday will become the latest casualty of the federal government's partial shutdown, closing campgrounds due to health and safety concerns over near-capacity pit toilets.With a quarter of the federal government employee workforce beginning 2019 out of work or working without a paycheck, agencies from the National Park Service to the Environmental Protection Agency and the Smithsonian museums are feeling the pinch.Unlike some previous government shutdowns, when national parks closed entirely, gates have remained opened under the Trump administration, leaving parks severely understaffed.Joshua Tree, more than 792,000 acres of national park nestled between Palm Springs to the south and the town of Joshua Tree to the north, will remain open during the shutdown but its popular campgrounds will close at noon Wednesday, according to the National Park Service."The park is being forced to take this action for health and safety concerns as vault toilets reach capacity," the park service said."In addition to human waste in public areas, driving off-road and other infractions that damage the resource are becoming a problem."The National Park Service also said the shutdown prevented it from making staff available to "provide guidance, assistance, maintenance, or emergency response.""Any entry onto NPS property during this period of federal government shutdown is at the visitor's sole risk," the park service said this week.Trash collection has stopped along with road and walkway maintenance.Rattlesnake Canyon will close to reduce the number of search and rescue events for rangers already spread thin because of the shutdown, the park service said.The shutdown has also left a stinking mess at Yosemite National Park in the Sierra Nevada mountain range in eastern California.Yosemite, the nation's third most-visited national park, remains open but various campgrounds as well as snow play areas are "closed due to human waste issues and lack of staffing," according to its website.On the Yosemite Twitter account on Sunday, officials said a "lack of the restrooms and resulting impacts from human waste" forced the closure of the campgrounds. "People entering closed areas are being cited," the tweet said.The visitor center and museum at Yosemite are closed and emergency response times may increase during the shutdown.Kristen Brengel, vice president of government affairs for the National Parks Conservation Association, said the shutdown not only hurts the parks but also surrounding communities that rely on an estimated million a day from tourism."It's really a big deal for Joshua Tree," she said of the campground closings. "This is a very popular season for people that come there."Brengel said staff shortages had created a sense of "lawlessness" in the parks."People are bringing in dogs and drones and there are instances where people aren't following the rules and it is not good for the wildlife and the environment," she said.Joshua Tree Superintendent David Smith, in a statement, thanked the "local businesses, volunteer groups, and tribal members" who have stepped up to collect trash and maintain grounds during the shutdown."This is a reflection on their efforts and the park is very fortunate to have a community that exhibits the kind of care and concern witnessed over the last week," he said.David Lamfrom, director of the California Desert and National Wildlife Programs of the National Parks Conservation Association, said the volunteer efforts can't supplant the work of the park service."People are walking off trails, bringing their dogs," he said. "People are trampling and destroying the things they want to preserve without knowing it. ... People are camping where they want or showing up really early or late at certain watering holes so animals like bighorn sheep won't come down to drink."Key parts of the federal government have been impacted by the December 22 shutdown, including the departments of Homeland Security, Justice, Interior, State and Housing and Urban Development.The shutdown began after President Donald Trump was unwilling to back down from his demand for billion for his long-promised border wall. The figure was a nonstarter for Democrats, leaving Congress at an impasse. 4336

An arrest warrant has been issued for Cleveland Browns wide receiver Odell Beckham Jr. after video showed him slapping the backside of a police officer in the LSU locker room following the Tigers' win in the national championship on Monday, NOLA.com reports.Police seek Beckham in relation to a simple battery charge. A "law enforcement source" told 362

An internet voting app that has been used in pilots in West Virginia, Denver, Oregon and Utah has vulnerabilities that could allow hackers to change a person’s vote without detection, according to researchers at the Massachusetts Institute of Technology. The 271

BURKE, Va. – A Virginia teacher helped his eight-grade science students turn kitchens into classrooms for a good cause. “I just touch the gas pedal and it’s really them just taking off,” David Kelly said. All of the students are part of a fundraising effort called, 278

来源：资阳报