【Today's Cover】
The Lunar Year of the Tiger is approaching, and the tigers in the zoo are very popular with tourists. The picture shows the Siberian tiger in the Nantong Forest Wildlife Park in Jiangsu Province. Xinhua News Agency, photo by Xu Congjun
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● On the 30th, at the press conference on the prevention and control of the new coronavirus pneumonia epidemic in Beijing, Li Ang, deputy director of the Beijing Municipal Health Commission and spokesman of the Beijing Municipal Health Commission, introduced that after the assessment of the Beijing Municipal Center for Disease Control and Prevention, according to the "Beijing Municipal New Crown Pneumonia Epidemic Risk Classification Standards", Beijing will immediately designate the Wanliuyuan Community in Yuquanying Street in Fengtai District, the Yihai Garden Community in Xincun Street in Fengtai District, and the Huangtugang Village in Yuquanying Street in Fengtai District as high-risk areas. (Source: Science and Technology Daily)
Construction site of the dredging project from Shapotou Junction in Zhongwei City, Ningxia Province, Yellow River, to Baima Township, Zhongning County, taken on February 25, 2021 (drone photo). Image source: Xinhua Net
● According to the newly released "Yellow River Basin Soil and Water Conservation Communiqué (2020)", after years of treatment, the area and intensity of soil erosion in the Yellow River Basin have achieved a "double decline", the ecological environment has continued to improve, and the situation of serious soil erosion has improved significantly. (Source: XinhuaNet)
Pure technology
Image source: The Paper
●Recently, the team of Academician Xu Jianguo of the Chinese Center for Disease Control and Prevention and the team of Professor Sun Yamin of the Institute of Public Health and Health of Nankai University published a research paper entitled "Origin and Evolution Analysis of the SARS-CoV-2 Omicron Variant" in the professional journal "Journal of Biosecurity and Biosecurity". By comparing the mouse adaptive strain with the Omiljung mutation spectrum, the team found that the Omiljun virus strain may have originated in mice and evolved in the mouse host and then re-transmitted to humans. (Source: The Paper)
Schematic diagram of surface vulcanization and band bending. Screenshot of the paper
●Recently, the team of Fang Junfeng, a professor at East China Normal University, and Li Xiaodong, an associate researcher at the Ningbo Institute of Materials of the Chinese Academy of Sciences, cooperated to publish a paper in science magazine, introducing their latest scientific research achievements in the research of trans-perovskite solar cells. The reviewer of the journal Science commented, "(The study) has created a new world record for the efficiency of trans-perovskite batteries, and for the first time achieved trans-perovskite batteries with a conversion efficiency greater than 24%. (Source: China Science Daily)
The three-dimensional structure of ABCG1 and its molecular mechanisms that mediate cholesterol transport. Screenshot of the paper
●Recently, professors Chen Yuxing and Zhou Congzhao of the University of Science and Technology of China used single-particle cryo-electron microscopy technology to analyze the three-dimensional structure of the human cholesterol excretion transporter ABCG1 and the substrate cholesterol, adenosine triphosphate and sphingomyelin molecular complex, revealing the molecular mechanism of cholesterol transmembrane emission through ABCG1, and found that cholesterol receiver and sphingomal phosphingin molecules on the membrane are necessary for excretion activity. The results were published online in the Cell Report. (Source: China Science Daily)
Look at the world
On January 9, a subject was tested at a COVID-19 testing site in Times Square, New York, USA. Xinhua News Agency, photo by Guo Ke
● The Associated Press reported on the 28th that since the middle of November last year, the average number of new coronavirus deaths in the United States for seven days has continued to rise, rising to 2267 on the 27th of this month. When the Delta strain spread in September last year, the number of fatal cases peaked at 2,100. Almost all of the current new infections in the United States are caused by the Olmikeron strain. (Source: CCTV News)
This is reactors No. 1, 2, 3 and 4 (from left to right) photographed inside the Fukushima Daiichi Nuclear Power Plant in Japan on October 12, 2017. Xinhua News Agency
● According to the Japanese media "Fukushima Minyou" report, Tokyo Electric Power Company released data on the 27th, Fukushima Daiichi Nuclear Power Plant will produce an average of 150 tons of nuclear waste per day in 2021, an increase of 10 tons over the daily average in 2020. (Source: Overseas Network)
Da
A Siberian tiger photographed in heilongjiang's Siberian Tiger Forest Park on January 15. Photo by Xinhua News Agency reporter Zhang Tao
●According to the Cat Research Center of the State Forestry and Grassland Administration, wild Siberian tigers have recently been found in the Daxinganling area of Heilongjiang Province. On December 29, 2021, a research team led by Zhou Shaochun, associate researcher of the Heilongjiang Wildlife Research Institute, found snow footprints and footprint chains of suspected Siberian tigers in the Daxinganling Arctic Village National Nature Reserve. The investigators followed the footprints and obtained 4 copies of feces. The SPECIES identification of the DNA obtained in the feces obtained in the wild was carried out by the Feline Research Center of the State Forestry and Grassland Administration, and it was determined to be a Siberian tiger. This is the rediscovery of wild Siberian tigers in the Daxing'anling area after more than 50 years. (Source: Xinhua News Agency)
Editor: Zhang Qiqi
Review: Yue Liang
Final Judgement: Wang Yu