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China-Europe freight trains deliver over 34,000 cooling appliances_我的网站

一 |          (ECNS) -- Freight trains from Xi'an, Shaanxi Province, have shipped more than 34,000 air conditioners, fans and other cooling products to 15 European countries this year, meeting surging demand during a heatwave.     Rail shipments reach Europe in about 12 days, compared with 40 days by sea, according to Xi'an International Land Port officials.        The port has introduced smart terminals and fast-track services for cooling appliances.    The range of goods carried by China-Europe freight trains has expanded from basic building materials and household goods to high-end products such as new energy vehicles and lithium batteries, as well as consumer goods such as cooling appliances.    The trains have served as an important link for trade and economic exchanges across Eurasia, supporting the Belt and Road Initiative.    （By Helen Mo & intern Liu Shuangjing）                    。    A team of scientists has discovered a likely explanation for why one may feel exhausted after engaging in intense cognitive work.,In their study, published in the Current Biology last week, the researchers argue that intense cognitive work, when it lasts for several hours, results in the buildup of potentially toxic byproducts in the prefrontal cortex part of the human brain, which then affects a person’s behavior.,“Influential theories suggested that fatigue is a sort of illusion cooked up by the brain to make us stop whatever we are doing and turn to a more gratifying activity,” Mathias Pessiglione of Pitié-Salpêtrière University in Paris, said as quoted in a news release by Cell Press. “But our findings show that cognitive work results in a true functional alteration—accumulation of noxious substances—so fatigue would indeed be a signal that makes us stop working but for a different purpose: to preserve the integrity of brain functioning.”,During the course of their research, the team employed magnetic resonance spectroscopy to monitor the brain chemistry of two groups of people during a workday, with one group performing easy cognitive tasks while the other engaged in more complex mental activities.,Only the latter group ended up exhibiting signs of fatigue, as well as a tendency to favor “options proposing rewards at short delay with little effort,” as the news release put it.,AmericasChild Survives After 7 Minutes Without Blood Flow to Brain During Surgery, US Cardiologist Reveals11 August, 16:41 GMT,Furthermore, members of that group had higher levels of glutamate in the synapses of the prefrontal cortex, leading the researchers to suggest that the accumulation of glutamate “makes further activation of the prefrontal cortex more costly,” and thus a mentally exhaustive workday makes cognitive control more difficult.,Unfortunately, there seems to be no fancy way to deal with this problem other than the tried and tested method that is probably as old as history itself.,“I would employ good old recipes: rest and sleep!” Pessiglione remarked. “There is good evidence that glutamate is eliminated from synapses during sleep.”。

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