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| 1 | Interaction of NPK Fertilizers During Their Transformation in Soils: I. Dynamic Changes of Soil pH显示文摘Dynamic changes of soil pH as influenced by ammonium sulfate (AS), monocalcium phosphate (MCP),potassium chloride (KCl) and their interaction in soils were evaluated in incubation experiments. Applyingthese fertilizers significantly reduced soil pH values in all cases and followed sequences of AS > MCP >KCl, MCP > KCl > AS and KCl > AS > MCP for the paddy, calcareous and red soils, respectively. TheAS-induced reduction of pH in the three soils followed the sequence of red soil > paddy soil > calcareous soil,while in MCP and KCl systems the reduction of pH followed the sequences of calcareous soil > paddy soil >red soil and red soil > calcareous soil > paddy soil, respectively. The interactions of the NPK fertilizers on pHwere significant. MCP plus KCl or MCP plus AS reduced pH values more than the fertilizers applied solelyin the paddy soil, but AS partly counteracted the effect of MCP on pH in the 1 d sample of the calcareoussoil. The effect of MCP on pH was trivial when MCP was applied in combination with KCl or AS in the redsoil. When applied in combination with AS, KCl did not affect soil pH initially, but suppressed the reductionof pH at the later incubation stage, which was related to inhibition of nitrification by KCl in the soils. | WANG HUOYAN, ZHOU JIANMIN, CHEN XIAOQIN, LI SHOUTIAN, DU CHANGWEN and DONG CAIXIAInstitute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China) | 2003 | Pedosphere2003，13，3： | 28 |
| 2 | A Case of New Variant COVID-19 First Emerging in South Africa Detected in Airplane Pilot—Guangdong Province,China,January 6,2021显示文摘On January 6,2021,Guangdong CDC successfully isolated the 501Y.V2 variant of coronavirus disease 2019(COVID-19)virus from a throat swab of a patient.The 501Y.V2 variant was first detected in South Africa,and the patient is a 55-year-old male airline pilot of South African nationality.He entered Guangzhou City,the capital of Guangdong Province,from Singapore on the evening of December 8,2020 and was subject to a COVID-19 test. | Fengjuan Chen Bosheng Li Peter Hao Yang Song Wenbo Xu Nankun Liu Chunliang Lei Changwen Ke | 2021 | China CDC weekly2021，3，2： | 5 |
| 3 | Resveratrol prevents interleukin-1 β-induced dysfunction of pancreatic β-cells显示文摘Objective:Interleukin-1β(IL-1β)plays an important role in the development of type 1 and type 2 diabetes mellitus.Resveratrol,a polyphenol,is known to have a wide range of pharmacological properties in vitro.In this research,we examined the effects of resveratrol on IL-1β-inducedβ-cell dysfunction.Methods:We first evaluated the effect of resveratrol on nitric oxide(NO)formation in RINm5F cells stimulated with IL-1βusing the Griess method.Next,we performed transient transfection and reporter assays to measure the transcriptional activity of peroxisome proliferator-activated receptor-γ(PPAR-γ).We also used Western blotting analysis to assess the effect of resveratrol on inducible nitric oxide synthase(iNOS)expression and nuclear factor-κB(NF-κB)translocation to the nuclei in cells treated with IL-1β.In addition,we assessed the transcriptional activity of NF-κB using an electrophoretic mobility shift assay(EMSA).Finally,we evaluated the effect of resveratrol on IL-1β-induced inhibition of glucose-stimulated insulin secretion in freshly isolated rat pancreatic islets.Results:Resveratrol significantly suppressed IL-1β-induced NO production,a finding that correlated well with reduced levels of iNOS mRNA and protein.The molecular mechanism by which resveratrol inhibited iNOS gene expression appeared to involve increased PPAR-γactivity,which resulted in the inhibition of NF-κB activation.Further analysis showed that resveratrol could prevent IL-1β-induced inhibition of glucose-stimulated insulin secretion in rat islets.Conclusion:In this study,we demonstrated that resveratrol could protect against pancreaticβ-cell dysfunction caused by IL-1β. | Fang Chen Xiaohua Zhou Yan Lin Changwen Jing Tao Yang Yong Ji Yujie Sun Xiao Han | 2010 | The Journal of Biomedical Research2010，24，5： | 3 |
| 4 | Antibody neutralization to SARS-CoV-2 and variants after 1 year in Wuhan,China显示文摘Most COVID-19 convalescents can build effective anti-SARS-CoV-2 humoral immunity,but it remains unclear how long it can maintain and how efficiently it can prevent the reinfection of the emerging SARS-CoV-2 variants.Here,we tested the sera from 248 COVID-19 convalescents around 1 year post-infection in Wuhan,the earliest known epicenter.SARS-CoV-2 immunoglobulin G(IgG)was well maintained in most patients and potently neutralizes the infection of the original strain and the B.1.1.7 variant.However,varying degrees of immune escape was observed on the other tested variants in a patient-specific manner,with individuals showing remarkably broad neutralization potency.The immune escape can be largely attributed to several critical spike mutations.These results suggest that SARS-CoV-2 can elicit long-lasting immunity but this is escaped by the emerging variants. | Qianyun Liu Qing Xiong Fanghua Mei Chengbao Ma Zhen Zhang Bing Hu Junqiang Xu Yongzhong Jiang Faxian Zhan Suhua Zhou Li Tao Xianying Chen Ming Guo Xin Wang Yaohui Fang Shu Shen Yingle Liu Fang Liu Li Zhou Ke Xu Changwen Ke Fei Deng Kun Cai Huan Yan Yu Chen Ke Lan | 2022 | The Innovation2022，3，1： | 3 |
| 5 | Three-dimensional domain swapping as a mechanism to lock the active conformation in a super-active octamer of SARS-CoV main protease显示文摘Proteolytic processing of viral polyproteins is indispensible for the lifecycle of coronaviruses.The main protease(M^(pro))of SARS-CoV is an attractive target for anti-SARS drug development as it is essential for the polyprotein processing.M^(pro) is initially produced as part of viral polyproteins and it is matured by autocleavage.Here,we report that,with the addition of an N-terminal extension peptide,M^(pro) can form a domain-swapped dimer.After complete removal of the extension peptide from the dimer,the mature M^(pro) self-assembles into a novel super-active octamer(AO-M^(pro)).The crystal structure of AO-M^(pro) adopts a novel fold with four domainswapped dimers packing into four active units with nearly identical conformation to that of the previously reported M^(pro) active dimer,and 3D domain swapping serves as a mechanism to lock the active conformation due to entanglement of polypeptide chains.Compared with the previously well characterized form of M^(pro),in equilibrium between inactive monomer and active dimer,the stable AO-M^(pro) exhibits much higher proteolytic activity at low concentration.As all eight active sites are bound with inhibitors,the polyvalent nature of the interaction between AO-M^(pro) and its polyprotein substrates with multiple cleavage sites,would make AO-M^(pro) functionally much more superior than the M^(pro) active dimer for polyprotein processing.Thus,during the initial period of SARS-CoV infection,this novel active form AOM^(pro) should play a major role in cleaving polyproteins as the protein level is extremely low.The discovery of AOM^(pro) provides new insights about the functional mechanism of M^(pro) and its maturation process. | Shengnan Zhang Nan Zhong Fei Xue Xue Kang Xiaobai Ren Jiaxuan Chen Changwen Jin Zhiyong Lou Bin Xia | 2010 | Protein & Cell2010，1，4： | 2 |
| 6 | Robust joint source-channel coding for image transmission over wireless channels 显示文摘 | Cai Jianfei Chen Changwen | 2000 | IEEE Trans on Circuits and Systems for Video Technology2000，10，6： | 1 |
| 7 | Effect of gas hydrate drilling fluids using low-solid phase mud system in plateau permafrost显示文摘 | Chen Liyi Wang Sheng Ye Changwen | 2014 | Procedia Engineering2014，73，： | 1 |
| 8 | A new hybrid DCT-wiener based interpolation scheme for video intra frame up-sampling 显示文摘 | Wu Zhenyu Yu Yongyang CHEN Changwen | 2010 | IEEE Signal Pro- cessing Letters2010，17，10： | 1 |
| 9 | Characteristics of Ambient Air Quality in the Central Urban Area of Western Guizhou in the Past Five Years显示文摘Air is an important condition for human activities and survival,and its quality is closely related to the quality of life and level of health for the people.In recent years,the problem caused by air quality has become one of the main problems that endanger human health and restrict economic development,which has been widely concerned.In this paper,the air quality status and its changing trend were analyzed by using the methods of the comprehensive index of ambient air quality and Spearman s rank correlation coefficient,based on the hourly pollutant concentration data of five national ambient air quality monitoring stations in the central urban area of Liupanshui City,Guizhou Province from January 1,2015 to December 31,2019.The results showed that the concentration of air pollutants in the atmosphere in the past five years showed a downward trend in the central urban area of Liupanshui City.During 2018-2019,the air quality has been up to the standard for two consecutive years,and it was developing to a higher quality direction.The air quality was better in summer half year than in winter half year.In one year,the air quality was the best in June and the worst in February.The air quality was the best at 07:00 and the worst at 21:00 every day.The air quality in the east and the west of the city was better than that in the middle.In most years,the activities,making and burning paper to resemble money as an offering sacrifices to gods or ancestors in Zhongyuan Festival,caused serious pollution. | Shihua JIANG Zaixiang CHI Kai XU Lijuan LIU Zijiang YANG Changwen CHEN | 2020 | Meteorological and Environmental Research2020，11，6： | 1 |
| 10 | Joint source channel rate-distortion analysis for adaptive mode selection and rate control in wireless video coding显示文摘 | He Zhihai Cai Jianfei Chen Changwen | 2002 | IEEE Transactions on CSVT2002，12，6： | 1 |
| 11 | Robust Joint Source-Channel Coding for Image Transmission over Wireless Channels显示文摘 | Cai Jianfei Chen Changwen | 2000 | IEEE Trans on Circuits System Video Technol2000，10，6： | 1 |
| 12 | Collaborative Image Coding and Transmission over Wireless Sensor Networks显示文摘 | Min Wu ChangWen Chen | 2007 | EURASIP Joumal on Advances in Signal Processing2007，，1： | 1 |
| 13 | A Novel Product Coding and Recurrent Alternate Decoding Scheme for Image Transmission Overnoisy Channels显示文摘 | Cao Lei Chen Changwen | 2003 | IEEE Transactions on Communications2003，51，9： | 1 |
| 14 | Removal of phosphate from aqueous solution by thermally treated natural palygorskite显示文摘 | Fangqun Gan Jianmin Zhou Huoyan Wang Changwen Du Xiaoqin Chen | 2009 | Water Research2009，，11： | 1 |
| 15 | Property of Meromorphic Solutions of Certain Nonlinear Differential and difference Equations显示文摘 | Peng Changwen Chen Zongxuan | 2012 | Joumal of South China Normal University2012，44，1： | 1 |
| 16 | Cloud-based video communication and networking: an architectural overview显示文摘Cloud-based video communication and networking has emerged as a promising new research paradigm to significantly improve the quality of experience for video consumers.An architectural overview of this promising research area was presented.This overview with an end-to-end partition of the cloud-based video system into major blocks with respect to their locations from the center of the cloud to the edge of the cloud was started.Following this partition,existing research efforts on how the principles of cloud computing can provide unprecedented support to 1)video servers,2)content delivery networks,and 3)edge networks within the global cloud video ecosystems were examined.Moreover,a case study was exemplfied on an edge cloud assisted HTTP adaptive video streaming to demonstrate the effectiveness of cloud computing support.Finally,by envisioning a list of future research topics in cloud-based video communication and networking a coclusion is made. | YAN Zhisheng CHEN Changwen | 2016 | Journal of Communications and Information Networks2016，1，1： | 1 |
| 17 | Synthesis of novel core-shell structured WO 3 /TiO 2 spheroids and its application in the catalytic oxidation of cyclopentene to glutaraldehyde by aqueous H 2 O 2显示文摘 | Xin-Li Yang Wei-Lin Dai Changwen Guo Hui Chen Yong Cao Hexing Li Heyong He Kangnian Fan | 2005 | Journal of Catalysis2005，，2： | 1 |
| 18 | Joint source channel rate-distortion analysis for adaptive mode selection and rate control in wireless video coding 显示文摘 | He Zhihai Cai Jianfei Chen Changwen | 2002 | IEEE Trans on Circuits and Systems for Video Technology2002，12，6： | 1 |
| 19 | Joint source channel rate-distortion analysis for adaptive mode selection and rate control in wireless video coding显示文摘 | He Zhihai Cai Jianfei Chen Changwen | 2002 | IEEE Trans on CSVT2002，12，6： | 1 |
| 20 | Robust joint sourcechannel coding for image transmission over wireless channels 显示文摘 | CAIJianfei CHEN Changwen | 2000 | IEEE Transactions on Circuits System Video Technology2000，10，6： | 1 |
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