[quick news] alarm on May 15, 2019! Atmospheric carbon dioxide concentration is the highest in human history

Alert! The concentration of carbon dioxide in the atmosphere has reached the highest level in human history A few days ago, a sensor of the monaloa meteorological station of the National Oceanic and Atmospheric Administration (NOAA) monitored an amazing data The concentration of carbon dioxide (CO2) in the atmosphere has exceeded 415 ppm, that is to say, the mass of CO2 exceeds 4.15% of the total mass of the atmosphere, which is the highest record ever For the first time in human history, CO2 concentrations in the earth's atmosphere exceeded 415 ppm, meteorologist Eric holthas said on twitter "This is not only the first time in recorded history, nor the first time since the emergence of agricultural civilization 10000 years ago, but also the first time since the emergence of human beings millions of years ago We have never seen such a earth " In recent years, the concentration of CO2 in the atmosphere is still rising rapidly Ralph Keeling, the head of the Scripps Institute for oceanography, who has been tracking changes in CO2 concentrations, said the average growth rate is still at an all-time high This year's growth is 3 ppm compared with last year, while the average growth rate in recent years is 2.5 ppm per year A study from the University of Michigan suggests that by the middle of the next century, the concentration of CO2 in the atmosphere may have soared to the level of 56 million years ago Http://digitalpaper.stdaily.com/http_ / 15 / content_ HTM? Div = - 1 Chinese scientists have conquered the key technology of artemisinin green large-scale production, artemisinin and other natural extraction drugs, because of their special sources, have been difficult to produce as high-efficiency, large-scale and continuous as chemical drugs The green large-scale production process of artemisinin developed by the Institute of process engineering, Chinese Academy of Sciences has been successfully applied to solve the key technical problems restricting the development of related industries Zhang suojiang, director of the Institute of process engineering, Chinese Academy of Sciences, said that most of the artemisinin production processes are intermittent This technology solves the key technology and system integration problems that restrict the large-scale and continuous production of artemisinin It not only opens a new path for the green upgrading of artemisinin production process, but also provides a useful reference for the extraction and separation process of other natural products At present, the process has been successfully applied Jiang Hongge, general manager of Henan Yuzhou Tianyuan Biotechnology Co., Ltd., as the first application enterprise, said that the production and operation results show that the whole process runs stably, the solvent recovery rate can reach 99.9%, the energy consumption is reduced by 43% compared with the traditional process, and the annual output can reach 60 tons Http:// the national science and Technology Week 2019 was launched on May 19, 2014, and the press conference of national science and Technology Week 2019 and Beijing Science and technology week was held It was announced that the main venue of national science and Technology Week 2019 and Beijing Science and technology week will be may 19-26 It was held in the Military Museum of the Chinese people's revolution The theme of this science and technology week is "science and technology strengthen the country, science and technology benefit the people" It will display major achievements in science and technology innovation and science and technology benefit the people, so that the public can understand scientific knowledge, experience scientific fun and sense scientific spirit The main exhibition area of this science and technology week is about 11500 square meters, including 6500 square meters indoor and 5000 square meters outdoor The main event of Beijing Science and technology week is based on the major achievements of the construction of national science and technology innovation center in the past five years It consists of four chapters: Planning Leading chapter, science and technology powerful Beijing as chapter, good life chapter, science and technology benefiting people chapter It shows the scientific and technological innovation achievements, science and technology exhibitions and interactive experience production in the fields of aerospace, intelligent equipment, integrated circuit, artificial intelligence, new materials, etc There are more than 280 projects, such as Pinpin, etc., which narrate the vivid practice of national science and technology innovation center in planning and construction layout, major scientific and technological achievements, innovation and entrepreneurship creation, science popularization achievements benefiting people, etc Http://news.scienceet.cn/htmlnews/2019/5/426204.shtm research team of International Center for genetic engineering and Biotechnology (ICGEB) has developed a new therapy for myocardial infarction By implanting gene drugs, it can help induce cardiac cell regeneration and treat heart failure This is the first experiment to prove that heart regeneration can be achieved by implanting effective gene drugs The drug can stimulate the heart regeneration of large animals The regenerated heart has the same structure and physiological function as human heart Professor maro gaka, the first author and head of the research team, said that the experiment used a virus to deliver microRNA molecules to the infarcted heart cells In large mammals, cardiac repair can be achieved by strictly controlling therapeutic agents and stimulating the proliferation of endogenous cardiac myocytes However, at present, the dosage and administration time can not be effectively controlled In the long run, there will be adverse reactions "Although we know this works well in mice, clinical trials will take a while for large mammals, and we will learn how to manage RNA as a synthetic molecule in large animals and patients," gaka added Https:// Chinese scientists study and reveal the high temperature protection mechanism of mammals on May 14, Lai Ren and Yang Shilong, researchers of Kunming Institute of zoology, Chinese Academy of Sciences, jointly with Yang Fan, Professor of Zhejiang University and Zheng Jie, Professor of University of California Davis, published papers in nature · communication, revealing TRPV1 The molecular mechanism of thermal inactivation of TRPV1 and its important biological significance in mammalian evolution indicate that thermal inactivation of TRPV1 is an important mechanism of high temperature protection for higher mammals In order to explore the biological significance of thermal inactivation of TRPV1, the researchers constructed the platypus TRPV1 (p-trpv1) transgenic knock in mice The results showed that wild-type mice were more tolerant to long-term thermal stimulation than p-trpv1 mice, and p-trpv1 mice could avoid the stimulation of hot plate by continuous walking Moreover, long-term hot plate stimulation can burn the sole of p-trpv1 mice, but it has no significant effect on wild-type mice It can be seen that thermal inactivation of TRPV1 is a protective mechanism for higher mammals to cope with high temperature environment As one of the most primitive mammals, platypus TRPV1 has not yet evolved a high temperature mediated "activation deactivation" balance mechanism Therefore, platypus is extremely sensitive to the environment above 25 ℃, so it is difficult to adapt to the higher land living environment in its distribution area https://