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xuezhiqian123 Offline

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08.10.2018 10:06
y started using a whole set of genes that Antworten

(Xinhuanet photo) (Xinhuanet photo) (Xinhuanet photo) (Xinhuanet photo)
ZAGREB Mike Hughes Limited Jersey , July 27 (Xinhua) -- Following are the Results from the Croatian Open ATP final on Sunday (prefix number denotes seeding):


Final


Pablo Cuevas, Uruguay, bt 2-Tommy Robredo, Spain Womens Danielle Hunter Jersey , 6-3, 6-4


Semifinals


Pablo Cuevas, Uruguay, bt 1-Fabio Fognini Womens Eric Kendricks Jersey , Italy, 6-3, 6-4


2-Tommy Robredo, Spain Womens Trae Waynes Jersey , bt 3-Marin Cilic, Croatia, 7-6 (12-10), 6-3


HANOI Womens Laquon Treadwell Jersey , Jan. 24 (Xinhua) -- Vietnamese travel agencies are launching special package tours to China's Changzhou city of Jiangsu province to serve football fans who want to watch the 2018 AFC (Asian Football Confederation) U-23 Championship final match between Vietnam and Uzbekistan on Saturday.


Hanoi Red Tours is offering a three-day tour to Shanghai and Changzhou starting on Friday at a price tag of 18.9 million Vietnamese dong (836 U.S. dollars), the local firm announced on Wednesday.


Vietravel has launched four package tours to the two Chinese cities at different time frame at prices of 20-25 million Vietnamese dong (885-1,106 U.S. dollars), including tickets for the final match.


Hanoitourist Womens Ben Gedeon Jersey , AnzTravel, PanvinTours and QueenTour are offering similar tours with starting prices of 12.5 million Vietnamese dong (553 U.S. dollars).


On Tuesday in Changzhou, in an AFC U23 Championship semifinal game, Vietnam defeated Qatar 4-3 in a penalty shootout after a draw of 2-2 at the end of extra-time.


By Wednesday morning Womens Jaleel Johnson Jersey , many Vietnamese agencies and companies had pledged to offer combined rewards of some 20 billion Vietnamese dong (885,000 U.S. dollars) to Vietnam's U23 squad.




WASHINGTON, Jan. 24 (Xinhua) -- U.S. President Donald Trump will welcome his French counterpart Emmanuel Macron for an official state visit,the White House said Wednesday.


Macron has been invited to the White House for his "first state visit" under the Trump administration Womens Pat Elflein Jersey , said White House Press Secretary Sarah Huckabee Sanders at a daily briefing.


"The date is still being finalized and we don't have that yet done," Sanders said.


Macron's visit is scheduled for the end of April, U.S. media cited senior Trump administration officials as saying Tuesday.


Trump and Macron met and phoned each other several times last year. The two struggled to soften their divergence over climate change and trade liberalization by seeking common ground on security and the fight against terrorism.


Trump visited Paris in July 2017, weeks after the U.S. withdrawal from the Paris climate accord.






SAN FRANCISCO, March 12 (Xinhua) -- Marine biologists at Stanford University have discovered that corals activate a specific group of ancient, defensive genes when exposed to stressful environmental conditions.


By monitoring three coral colonies in a lagoon on Ofu Island, American Samoa, for their response to stressors like high temperatures, oxygen, and ocean acidity, the researchers saw a significant change in which genes the corals were activating within their cells.


These stress-induced genes could serve as a kind of warning sign for coral bleaching events.


Under stressful conditions, a coral's normal cellular functions begin to fail. In response, the group of genes identified in this study triggers a process, called the unfolded protein response, that works to restore normal conditions within the cell. If conditions continue to worsen, the corals bleach and eventually die.


Over the course of the seventeen-day study, Steve Palumbi, a professor of marine sciences and an author of a paper published in the latest issue of Science Advances, together with graduate student Lupita Ruiz-Jones, monitored over 17,000 coral genes at just after noon each day.


On the seventh and eighth day, when tides were lowest and temperatures hottest, the corals' genes initiated the cellular unfolded protein response. On day nine, the tides rose and the corals' systems returned to normal.


"For the first time, we are able to ask those corals, 'how are you doing?' They don't have a heartbeat. They don't have a pulse. We need to know their vital signs in order to understand how they react to the environment," Palumbi was quoted as saying in a news release from Stanford.


The lagoon on Ofu Island, a shallow turquoise bathtub, provided the ideal coral laboratory for studying heat-tolerant corals. The corals on Ofu experience water temperatures near human body temperature, enough to kill most coral species. However, they prosper in stressful environmental conditions.


Scientists believe that frequent, pulsing exposure to high temperatures may make corals stronger, much in the same way athletes train for competition. Understanding why some of the world's toughest corals are so heat-tolerant could help scientists identify and map other survivor coral colonies around the globe.


The stress response has been observed in mammals as well as some yeast species. Humans activate the same ancient genes in response to diseases, like cancer.


In times of stress, a cell's misfolded and unfolded proteins accumulate in the endoplasmic reticulum, a series of flattened, tube-like structures in the cell that assist with building proteins. The unfolded protein response is a reaction to the flood of misassembled proteins.


"It's basically the organism recognizing that something isn't right," Ruiz-Jones said.


In the corals' case, Palumbi said, "they started using a whole set of genes that they had just not been using before."

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