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| 1 | Cold-chain food contamination as the possible origin of COVID-19 resurgence in Beijing显示文摘COVID-19,caused by SARS-CoV-2[1,2],has been contained in China through stringent non-pharmaceutical interventions.Border control and quarantine have effectively prevented the virus from being spread by infected travellers,but the risk of resurgence caused by other routes of introduction and transmission remains unclear,and current strategies to prevent resurgence could be flawed.Since July,SARS-CoV-2 RNA contaminations in frozen food imported from countries with ongoing epidemics have been reported in nine provinces in China[3,4].However,there is no robust evidence of COVID-19 outbreaks initiated by environmentto-human transmission.Here we add to evidence of such transmission by investigating the recent COVID-19 resurgence in Beijing. | Xinghuo Pang Lili Ren Shuangsheng Wu Wentai Ma Jian Yang Lin Di Jie Li Yan Xiao Lu Kang Shichang Du Jing Du Jing Wang Gang Li Shuguang Zhai Lijuan Chen Wenxiong Zhou Shengjie Lai Lei Gao Yang Pan Quanyi Wang Mingkun Li Jianbin Wang Yanyi Huang Jianwei Wang COVID-19 Field Response Group COVID-19 Laboratory Testing Group | 2020 | National Science Review2020，7，12： | 51 |
| 2 | Macro-mechanical properties of columnar jointed basaltic rock masses 显示文摘 | DI Shengjie XU Weiya NING Yu | 2011 | J Central South Univ Technol2011，，18： | 1 |
| 3 | Detection of viral antigens in renal tissue of glomerulonephritis patients without serological evidence of hepatitis B virus and hepatitis C virus infection显示文摘 | Dan Kong Di Wu Tianzhen Wang Tianzhu Li Shengjie Xu Fulai Chen Xiaoming Jin Ge Lou | 2013 | International Journal of Infectious Diseases2013，，7： | 1 |
| 4 | Detection of viral antigens in renal tissue of glomerulonephritis patients without serological evidence of hepatitis B virus and hepatitis C virus infection显示文摘 | Dan Kong Di Wu Tianzhen Wang Tianzhu Li Shengjie Xu Fulai Chen Xiaoming Jin Ge Lou | 2013 | International Journal of Infectious Diseases2013，，7： | 1 |
| 5 | Fluorescence Properties and Chemical Composition of Fine Particles in the Background Atmosphere of North China显示文摘To understand the aerosol characteristics in a regional background environment,fine-particle(PM_(2.5),n=228)samples were collected over a one-year period at the Shangdianzi(SDZ)station,which is a Global Atmospheric Watch regional background station in North China.The chemical and optical characteristics of PM_(2.5)were analyzed,including organic carbon,elemental carbon,water-soluble organic carbon,water-soluble inorganic ions,and fluorescent components of watersoluble organic matter.The source factors of major aerosol components are apportioned,and the sources of the fluorescent chromophores are further analyzed.The major chemical components of PM_(2.5)at SDZ were NO_(3)^(-),organic matter,SO_(4)^(2-),and NH_(4)^(+).Annually,water-soluble organic carbon contributed 48%±15%to the total organic carbon.Secondary formation(52%)and fossil fuel combustion(63%)are the largest sources of water-soluble organic matter and water-insoluble organic matter,respectively.In addition,three humic-like and one protein-like matter were identified via parallel factor analysis for excitation–emission matrices.The fluorescence intensities of the components were highest in winter and lowest in summer,indicating the main impact of burning sources.This study contributes to understanding the chemical and optical characteristics of ambient aerosols in the background atmosphere. | Ping LI Siyao YUE Xiaoyang YANG Di LIU Qiang ZHANG Wei HU Shengjie HOU Wanyu ZHAO Hong REN Gang LI Yuanguan GAO Junjun DENG Qiaorong XIE Yele SUN Zifa WANG Pingqing FU | 2023 | Advances in Atmospheric Sciences2023，40，7： | 0 |
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