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eted a group of marine invertebra

 
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PostWysłany: Czw Gru 06, 2018 10:27    Temat postu: eted a group of marine invertebra Odpowiedz z cytatem

ANCHORAGE Cheap Hunter Pence Jersey , the United States, Sept. 2 (Xinhua) -- It's been almost five months since Chinese President Xi Jinping made a refueling stop in Anchorage in the U.S. state of Alaska, and the long-lasting effects of the brief stopover are being felt, Governor Bill Walker told Xinhua in a recent interview.


Walker, who hosted Xi at that time, said the relationship has grown significantly between the state of Alaska and China since then.


"Many opportunities have been confirmed, so we have continued to work on those opportunities," said Walker, adding that he is looking forward to visiting China in late September, his first trip to China as governor.


Xi met Walker while the plane of the Chinese delegation made a refueling stop in Anchorage on April 7 on his way back home after he met with his U.S. counterpart Donald Trump at Mar-a-Lago resort in Florida.


During the meeting, the Chinese president said Alaskan industries are complementary to those in China. He noted that while steady progress has been made in mutual cooperation, there's more potential to exploit.


"My goal (of the China trip) is to talk about opportunities that Alaska has with China and China has with Alaska," the governor said.


"It's really unlimited what we can do in our relationship with China," he said.


Trade and business opportunities are tremendously important to Alaska, whose revenue relies heavily on resources. Walker pointed out that China is Alaska's biggest trading partner with seafood as its top export to the Asian giant.


As the largest U.S. state in area with a tiny population of 750,000, Alaska enjoyed a trade surplus of 700 million U.S. dollars with China in 2016, according to the U.S. Department of Commerce. Alaska is one of eight U.S. states that holds a trade surplus with the world's second largest economy.


"We are looking forward to having more opportunities to export more resources to China," Walker said.


Elected in 2014, the governor has made energy a key part of his administration's agenda. What he made a strong pitch for during his short meeting with President Xi is a liquefied natural gas export project, which is aimed at shipping the natural gas developed in the Alaskan North Slop to the Asia Pacific market, the Chinese market in particular.


According to Keith Meyer, president of Alaska Gasline Development Corp., which is in charge of developing the project, high-level meetings with potential Chinese partners began shortly after Xi's stopover, and the talks are progressing smoothly.


Walker said he is also looking for more opportunities in tourism and mining with China, two other areas with great potential. He mentioned that the number of Chinese travellers to Alaska has grown since Xi's visit.


"I want to bring back a sense of opportunity that Alaska has with the relationship with China," he said. "Doing business with 1.4 billion people is really an opportunity for us."


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SAN FRANCISCO, Dec. 23 (Xinhua) -- A new study indicates that some marine worms go through a prolonged phase, probably for months, with little more than head.


The study about the trunk-less larval stage, a developmental strategy known as indirect development, known to be shared by many animals in the ocean, may shed light on the biological development of early animals.


"Indirect development is the most prevalent developmental strategy of marine invertebrates and life evolved in the ocean," said Chris Lowe, an associate professor of biology at Stanford University. "This means the earliest animals probably used these kinds of strategies to develop into adults."


Most research animals commonly found in labs, such as mice, zebrafish and the worm C. elegans, are direct developers, species that don't go through a distinct larval stage.


The research targeted a group of marine invertebrates called Hemichordata, because there is already a wealth of molecular developmental work done on direct developers in this group, and finally focused on Schizocardium californicum, a species of acorn worm and indirect developer in the Hemichordata phylum.


At Stanford's Hopkins Marine Station, graduate student Paul Gonzalez, lead author of a paper published in the journal Current Biology, became a hunter, breeder and farmer of the rare marine worm.


"Terrestrial, direct developing species develop fast, their life cycle is simple and they are easy to rear in the lab," said Gonzalez. By comparison, indirect developers develop slowly, have a long larval stage, and their larvae are difficult to feed and maintain in captivity. The reproductive adults are also challenging to keep in the lab.


After spending months perfecting the rearing and breeding techniques needed to study these worms, the researchers were able to sequence the ribonucleic acid (RNA) from various stages of the worm's development. They found that in the worms, activity of certain genes that would lead to the development of a trunk are delayed. So, during the larval stage, the worms are basically swimming heads.


"When you look at a larva, it's like you're looking at an acorn worm that decided to delay development of its trunk, inflate its body to be balloon-shaped and float around in the plankton to feed on delicious algae," Gonzalez was quoted as saying in a news release. "Delayed trunk development is probably very important to evolve a body shape that is different from that of a worm, and more suitable f. Wholesale Jerseys From China Wholesale Sports Jerseys Wholesale Authentic NCAA Jerseys Wholesale NBA Jerseys Online Wholesale College Football Jerseys Wholesale NBA Jerseys China Cheap College Jerseys China Cheap Authentic NBA Jerseys Cheap Jerseys China Cheap Jerseys From China
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