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| 1 | New WHO global air quality guidelines help prevent premature deaths in China显示文摘The air quality guidelines (AQGs) issued by the World Health Organization (WHO) in 2005 are key references for the National Ambient Air Quality Standards (NAAQSs) in China.On 22September 2021,the WHO issued new AQGs (NAQGs)[1],which propose more stringent targets to control exposure to multiple air pollutants,including fine particulate matter (PM_(2.5)) and ozone (O_(3)),to which,in 2019,451 million premature deaths,globally,were attributable [2]. | Tao Xue Guannan Geng Xia Meng Qingyang Xiao Yixuan Zheng Jicheng Gong Jun Liu Wei Wan Qiang Zhang Haidong Kan Shiqiu Zhang Tong Zhu | 2022 | National Science Review2022，9，4： | 3 |
| 2 | Impacts of solid physical properties on the performances of a slurry external airlift loop reactor integrating mixing and separation显示文摘Solid physical properties are vital for the design, optimization, and scale-up of gas–liquid–solid multiphase reactors. The complex and interactional effects of the solid physical properties, including particle diameter, density, wettability, and sphericity, on the hydrodynamic behaviors in a new external airlift loop reactor(EALR) integrating mixing and separation are decoupled in this work. Two semi-empirical equations are proposed and validated to predict the overall gas holdup and liquid circulating velocity satisfactorily, and then the individual influence of such solid physical properties is further investigated. The results demonstrate that both the overall gas holdup in the riser and the liquid circulating velocity in the downcomer increase with the contact angle, but decrease with particle size, density, and sphericity.Additionally, the impact of the particle size on the liquid circulating velocity is also profoundly revealed on a micro-level considering the particle size distribution. Moreover, the axial solid concentration distribution is discussed, and the uniformity of the slurry is described by the mixing index of the solid particles. The results show that a more homogeneous mixture can be achieved by adding finer particles other than attaining violent turbulence. Therefore, this work lays a foundation for the design, scale-up, and industrialization of the EALRs. | Tian Zhang Qingshan Huang Shujun Geng Aqiang Chen Yan Liu Haidong Zhang | 2023 | Chinese Journal of Chemical Engineering2023，55，3： | 0 |
| 3 | Monitoring of Avian Influenza Virus and Newcastle Disease Virus in Suichuan Region of Jiangxi Province显示文摘[Objective] The research aimed to investigate the epidemiological characteristics of Avian influenza virus( AIV) and Newcastle disease virus( NDV)of wild Ardeid birds in Suichuan region of Jiangxi Province. [Method] A total of 110 nasopharyngeal swabs and 110 cloacal swabs of Ardeid birds were collected from Suichuan region of Jiangxi Province in October of 2014. The swabs were conducted the virus isolation using SPF chicken embryos,suspected positive samples were screened by hemagglutination( HA) test and identified by Reverse Transcription-Polymerase Chain Reaction( RT-PCR). [Results] HA titre of all 110 test samples was 0 except four samples. Detection on AIV and NDV of the test samples by RT-PCR showed that all the samples were negative,which indicated that the infection risk of avian influenza( AI) and newcastle disease( ND) of Ardeid birds in Suichuan region in Jiangxi Province in the summer of 2014 was low. [Conclusion] The research provided the basic data for studying the infection situations of AI and ND of wild waterfowl in Jiangxi Province. | Geng Haidong Jin Hongmei Zhang Yanjun Zhang Xiaolin Zhang Jiajie Li Xiang Zhou Changyu Ding Yuanying Gao Guangyu Wang Zhuole Qiao Dan Li Yinxue Zhai Xiwen Hua Yuping Zhang Guogang Chai Hongliang | 2016 | Animal Husbandry and Feed Science2016，8，4： | 0 |
| 4 | Epizootiological surveillance of porcine circoviruses in free-ranging wild boars in China显示文摘Four species of porcine circoviruses(PCV1–4)have been reported to circulate in Chinese domestic pigs,while the epizootiology of these viruses in free-ranging wild boars in China remains unknown.In this study,tissue and serum samples collected from diseased or apparently healthy wild boars between 2018 and 2020 in 19 regions of China were tested for the prevalence of PCV1–4 infections.Positive rates of PCV1,PCV2,and PCV3 DNA in the tissue samples of Chinese wild boars were 1.6%(4/247),58.3%(144/247),and 10.9%(27/247)respectively,with none positive for PCV4.Sequence analysis of viral genome showed that the four PCV1 strains distributed in Hunan and Inner Mongolia shared 97.5%–99.6%sequence identity with global distributed reference strains.Comparison of the ORF2 gene sequences showed that 80 PCV2 strains widely distributed in 18 regions shared 79.5%–100%sequence identity with reference strains from domestic pigs and wild boars,and were grouped into PCV2a(7),PCV2b(31)and PCV2d(42).For PCV3,17 sequenced strains shared 97.2%–100%nucleotide identity at the genomic level and could be divided into PCV3a(3),PCV3b(2)and PCV3c(12)based on the phylogeny of ORF2 gene sequences.Serological data revealed antibody positive rates against PCV1 and PCV2 of 11.4%(19/167)and 53.9%(90/167)respectively.The data obtained in this study improved our understanding about the epidemiological situations of PCVs infection in free-ranging wild boars in China and will be valuable for the prevention and control of diseases caused by PCVs infection. | Wenjie Gong Haiying Du Tong Wang Heting Sun Peng Peng Siyuan Qin Haidong Geng Zheng Zeng Wangwang Liang Hongquan Ling Changchun Tu Zhongzhong Tu | 2023 | Virologica Sinica2023，38，5： | 0 |
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