[quick news] on April 25, 2019, an explosion accident happened in a chemical enterprise in Inner Mongolia, killing 4 people and injuring 35

An explosion occurred in a chemical enterprise in Inner Mongolia, killing 4 people and injuring 35 people at 2:55 a.m on April 24 The explosion occurred in the PVC workshop of Inner Mongolia Yidong group Dongxing Chemical Co., Ltd located in Qiaoying Town, Zhuozi County, Wulanchabu City, Inner Mongolia Autonomous Region Up to now, the accident has resulted in 4 deaths, 3 serious injuries, 2 minor injuries and 30 minor injuries of operators on site Under the guidance of the expert group, the fire protection professionals dispose of the site in an orderly manner The spherical tank valve beside the explosion point has been closed and the tank is in a stable isolation state At present, the fire is still burning, the fire is gradually weakened, and there is no obvious hidden danger People around the plant have been evacuated safely Medical departments spare no effort to rescue the injured, and relevant departments do a good job in pacifying the injured and their families At present, the injured have been properly treated and the condition of the injured is stable The ecological environment department pays close attention to the surrounding environment quality, organizes the environmental monitoring work in time, and the atmospheric and water environment monitoring indicators are relatively stable Http://nm.people.com.cn/n2/2019/0424/c196689-32876985.html scientists have found that fish oil can protect cardiovascular health damage caused by PM2.5 Supported by the National Natural Science Foundation of China's major research program "toxicology and health effects of fine particles in the atmosphere", Professor Kai Haidong, School of public health, Fudan University, led Lin Zhijing, a doctoral candidate, and Chen Renjie, an associate professor, made a research result that fish oil can protect cardiovascular health damage caused by PM2.5 Recently, the results have been published online in the top international journal of cardiovascular disease, the Journal of American Academy of Cardiology PM2.5 pollution level in China is relatively high, which has caused great health hazards to the cardiovascular system of residents Dietary supplementation of appropriate nutrients is a potential individual intervention, but there is little evidence-based medicine in this area In response to this, Professor kaihaidong's research team recruited 65 volunteers to carry out a 4-month field intervention study on the cardiovascular health hazards of PM2.5 by dietary fish oil supplement, using a randomized double-blind control design The results showed that the level of peripheral blood inflammation, coagulation and endothelial dysfunction, oxidative stress injury and stress hormone disorder caused by PM2.5 and fish oil 2.5g / day were improved in different degrees compared with the control group, suggesting that dietary fish oil supplementation has significant protective effect on cardiovascular damage caused by PM2.5 pollution Http://www.onlinejacc.org/content/73/16/2076 the first mass extinction occurred at the end of Ordovician more than 400 million years ago, which is the first mass extinction event in Earth history At that time, 85% of marine species were extinct, and the structure of biological community collapsed A team led by Wang Guangxu, associate researcher of Nanjing Institute of Geology and paleontology, Chinese Academy of Sciences, has recently used paleontological and carbon isotope stratigraphic data to accurately reduce the occurrence process of the mass extinction of organisms at the end of Ordovician more than 400 million years ago Wang Guangxu said that the exact time of the mass extinction is 445 million years ago, which coincides with the large-scale formation of the Gondwana ice sheet in Antarctica At that time, the cold climate and the formation of ice sheet are likely to be the main reasons for the disappearance of marine organisms in large areas Until 444 million years ago, climate fluctuations still existed, which resulted in the replacement of marine fauna, and even increased the diversity of coral, sponge and other animal groups By 443 million years ago, with the overall recovery of the climate and environment, the marine ecosystem began to fully recover The incidence rate of China's vaccine preventable infectious diseases dropped to a record low level in April 25th? Https://www.sciencedirect.com/science/article/pii/S0012825218305099 is the thirty-third child vaccination day in April 25th this year The theme of this year's CDC children's vaccination day is "prevention and control of infectious diseases, vaccination is the most effective" In the activity, the organizers showed the vaccination service system, the current situation of vaccination service and the prevention and control effect of vaccines against diseases Gao Fu, academician of the Chinese Academy of Sciences and director of the China Center for Disease Control and prevention, said that vaccines are the most economical and effective means to prevent and control infectious diseases However, some countries and regions have shown distrust of vaccines or even anti vaccines But the so-called anti vaccine campaign in Europe and the United States has suffered a lot Although the United States announced the elimination of measles in 2000, it was just over 1 / 3 in 2019 The measles epidemic has approached the peak of the past 10 years These anti vaccine campaigns cannot take root in China Http://news.sciencenet.cn/htmlnews/2019/4/425610.shtm chang'e-4 relay satellite has a poetic name At the main event of 2018 "China space day" held on April 24, the name of China's chang'e-4 relay satellite was officially announced - "magpie bridge" It will build a bridge between the ground measurement and control station and the chang'e-4 probe, which will land on the back of the moon in the future, to transmit signals and data Locked by the earth's tides, the moon can only face the earth on the same side forever Not only have humans never seen the back of the moon on earth, but communication signals will also be blocked Pei Zhaoyu, deputy director of China Lunar Exploration and space engineering center, said that China plans to launch "magpie bridge" to the Earth Moon Lagrange 2 o'clock on the Earth Moon extension line in mid May, about 60000 to 80000 kilometers away from the moon This is related to the success or failure of the whole chang'e-4 mission In addition to completing the relay task, "magpie bridge" will carry some test loads to carry out scientific exploration and new technology tests The two small satellites "longjiang-1" and "longjiang-2" developed by Harbin University of technology will carry out the formation flying test of moon orbit and carry out ultra long wave astronomical observation http://www.xinhuanet.com/politics/2019-04/25/c_1124412085.htm