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Effect of Incoming Vortex on Secondary Flows in Turbine Cascades with Planar and Non-Axisymmetric Endwall

Journal of Thermal Science 2024年第1期33卷 138-157页

作者： cao Zhiyuan WANG Chuxuan SONG Zhigao GAO xi ZHAO Wei LIU Bo school of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical UniversityXi'an 710072China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100080China school of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100080China

Non-Axisymmetric Endwall Profiling(NAEP) is commonly utilized in turbines to eliminate secondary ***,most of the NAEP methods consider a single-blade row environment without incorporating the effect of the stage *** paper aims to investigate the influence mechanism of the incoming vortex on the endwall secondary flow structures of NAEP in a highly loaded turbine *** model the incoming vortex in a stage environment,this study considers a half-delta wing as the vortex generator at the upstream of the turbine *** NAEP is then carried out for a highly loaded turbine cascade with an in-house numerical optimization design platform subject to no incoming *** simulation is also carried out under the influence of the incoming vortex for the turbine cascades with both planar and non-axisymmetric *** paper furthers investigated the pitchwise effect of the incoming vortex on the near endwall secondary *** results indicate that the NAEP effectively improves the endwall secondary flow of the turbine cascade,where the total pressure loss coefficient and the secondary kinetic energy(SKE) are reduced by 7.3%,and 45.7%,*** is further seen that with the incoming vortex,the NAEP achieves a considerable control effect on the endwall secondary flow of the turbine *** incoming vortex,the NAEP can still achieve considerable control effect on the endwall secondary flow of the turbine cascade;the averaged reductions of loss coefficient and SKE are 7.8% and 14.2%,*** some pitchwise locations,incoming vortex can suppress the convection of cross-passage flow toward the suction corner greatly and reduce the loss coefficient of the baseline *** incoming vortex at 4/7 pitch impinged right at the blade leading edge,leading to the generation of low-momentum fluid,which increased the size and the strength of the horseshoe *** all the pitchwise locations,NAEP can suppress the seco

关键词： non-axisymmetric endwall secondary flow incoming vortex passage vortex stage environment

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The orientation-averaged initial deformation effects on reaction dynamics in intermediate energy heavy ion collisions

The orientation-averaged initial deformation effects on reac...

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International workshop on nuclear dynamics in heavy-ion reactions and the symmetry energy

作者： cao xi-guang~(a)b)),cai xiang-zhou~(a)+), a) Shanghai Institute of Applied Physics,chinese academy of sciences,Shanghai 201800, china b) graduate school of the chinese academy of sciences,beijing 100039,china

Mg+Mg collisions with initial deformation have been simulated systematically by an isospin-dependent quantum molecular dynamics(IQMD) *** consider all the spacial configurations of project and target in the calculatio...

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10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang xiang‑Biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑xiong Huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Gong Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu guang‑Yuan Luan Jie Ren Zhi‑zhou Ren xi‑Chao Ruan Zhao‑Hui Song Kang Sun Zhi‑xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen xiao‑guang Wu Xuan Wu Cong xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao zhou Ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future school Dongguan 523808China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China china academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of chinese academy of sciences Beijing 100049China china Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the china Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification

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Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang Li Gong Li Dong Liu Zheng-Yao Jin xing-Zhu Cui Tian-xiang Chen Yi-Wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang Ling Kang Bo Li Chao Li Jia-Wen Li xiao Li Jie Liu Shu-Bin Liu guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-zhou Ren xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen xiao-guang Wu Xuan Wu Li-Kun xie Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang xian-Peng Zhang Yu-Liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping zhou Zhi-Hao zhou Ke-Jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of chinese academy of sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the china Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

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Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑xiong Huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑zhou Ren xi‑Chao Ruan Zhao‑Hui Song Zhi‑xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen xiao‑guang Wu Xuan Wu Li‑Kun xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping zhou Zhi‑Hao zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future school Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of chinese academy of sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the china Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

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制备条件对异丁烯选择性氧化催化剂性能的影响

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燃料化学学报 2004年第4期32卷 481-485页

作者：王蕾张锁江李增喜张香平王玉兰中国科学院过程工程研究所北京100080

通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器... 详细信息

通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器中,系统地考察了上述三种制备条件对复合氧化物催化剂催化异丁烯选择性氧化生成甲基丙烯醛反应性能的影响。结果表明,大比表面积的催化剂具有较高的活性,而平均孔径小的催化剂选择性较差。催化剂的最佳制备条件为:钼酸铵溶液的质量分数10%、pH值2～3、焙烧温度500℃。在异丁烯∶空气=6∶94(体积比)、GHSV=3600h-1和360℃条件下,异丁烯转化率87.2%,甲基丙烯醛选择性72.0%,甲基丙烯醛收率62.7%。

关键词：异丁烯甲基丙烯醛选择性氧化复合氧化物催化剂

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Characteristics of indoor and outdoor black carbon aerosol during winter and summer in rural area of Guanzhong Plain

Characteristics of indoor and outdoor black carbon aerosol d...

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第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Zhu Chongshu1,2 cao Junji1,Shen Zhen xing3,Liu Sui xin1,2(1.State Key Lab of Loess & Quaternary Geology,Institute of Earth Environment,chinese academy of sciences,xi’an,Shanxi 710075,china 2.graduate school of the chinese academy of sciences,beijing 100039,china 3.Department of Environmental Science and Engineering,xi’an Jiaotong University,xi’an,china.)

Black Carbon（BC） were measured continuously in rural area of Guanzhong Plain during winter and *** concentrations of BC varied acutely over a range of 3.9-25.6 μg m-3 for outdoor and 4.8-24.7 μg m-3 for indoor in daily mean concentration,with the overall average values of 14.6 μg m-3 and 14.4 μg m-3 for outdoor and indoor in winter,*** mean BC concentrations varied over a range of 2.9-9.9μg m-3 for outdoor and 4.7-10.2μg m-3 for indoor,with the overall average value of 6.0 μg m-3 and 7.2 μg m-3 for outdoor and indoor,respectively in *** results shows the concentrations of black carbon is high in the rural area,especially in winter,which is probably due to the local biomass burning for warming and *** rural area of Guanzhong Plain,Obviously diurnal variation of BC was observed,with the hourly average concentrations ascending to its peaks twice a day in the morning and at the *** frequency distributions of BC concentrations in both indoor and outdoor environments showed a similar *** indoor environment,it was found that the BC concentrations were distributed over the high spectrum of concentrations than that for outdoor *** relationships between indoor and outdoor concentrations（separately for LT,WN and HX sites） of BC were discussed,which showed a good correlation between indoor and outdoor air of the three *** results suggest that indoor black carbon was derived at least in part from outdoor air.

关键词： Black carbon rural area Guanzhong Plain

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Characterization of Primary and Secondary Carbonaceous Aerosols in xi’an,china

Characterization of Primary and Secondary Carbonaceous Aeros...

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第七届海峡两岸气胶技术研讨会暨第二届空气污染技术研讨会

作者： Suixin Liu1 Zhuzi Zhao1 Junji cao2 Zhenxing Shen3 1.SKLLQG Institute of Earth Environment chinese academy of sciences xi’an china graduate school of the chinese academy of sciences beijing china 2.SKLLQG Institute of Earth Environment chinese academy of sciences xi’an china 3.Department of Environmental Science and Engineering xi’an Jiaotong University china

＜正＞INTRODUCTION As a major component of atmospheric particulate matter （PM）,carbonaceous material plays an important role in visibility reduction,radiative forcing,and adverse human health effects1～4. Carbonaceo... 详细信息

关键词： time-resolved EC tracer method secondary organic aerosol

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电动车跨临界CO_(2)热系统充注定量需求规律及非适充系统失稳特性

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制冷学报 2024年第4期45卷 59-67页

作者：王从飞贾凡殷翔曹锋中国制冷学会北京100142 西安交通大学能源与动力工程学院西安710049 西安交通大学国家储能技术产教融合创新平台(中心) 西安710049

跨临界CO_(2)热系统是解决电动车“低温续航衰减”和“热系统工质温室效应强”主要问题的最佳技术之一,而电动车多变场景耦合跨临界循环复杂性,系统性能及运行稳定性强依赖于充注量。通过仿真研究了跨临界CO_(2)热系统在不同工况下的CO_... 详细信息

跨临界CO_(2)热系统是解决电动车“低温续航衰减”和“热系统工质温室效应强”主要问题的最佳技术之一,而电动车多变场景耦合跨临界循环复杂性,系统性能及运行稳定性强依赖于充注量。通过仿真研究了跨临界CO_(2)热系统在不同工况下的CO_(2)充注量定量需求变化规律。重点研究了环境温度、室内风量和室外风速这3个关键因素对不同模式下的系统制冷剂需求量的影响机理和定量表征;并探讨了在非适充场景下的系统动态特性。结果表明:热泵模式下,制冷剂需求下限随环境温度的升高、室内风量的降低和室外风速的增加而增大,其定量影响幅度为18.6%、6.16%和18.9%。制冷模式下,制冷剂需求下限则随环境温度的降低、室内风量的降低和室外风速的增加而增大,其定量影响幅度为7.03%、7.85%和2.27%。在非适充工况下,因非适充下的系统控制量与目标量作用关系发生潜在变化,导致系统出现失控,需要通过制冷剂分布调控缓解特殊工况的系统不稳定性。研究结果对于优化电动汽车空调系统储液器设计、提高其能效和舒适性具有重要参考价值。

关键词：电动汽车 CO_(2)热管理系统充注量需求系统失稳

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Methyltransferase Dot1l preferentially promotes innate IL-6 and IFN-β production by mediating H3K79me2/3 methylation in macrophages

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Cellular & Molecular Immunology 2020年第1期17卷 76-84页

作者： xiang Chen xingguang Liu Yunkai Zhang Wanwan Huai Qingqing zhou Sheng Xu xi Chen Nan Li Xuetao cao National Key Laboratory of Medical Immunology&Institute of Immunology Second Military Medical UniversityShanghai 200433China Institute of Immunology Zhejiang University School of MedicineHangzhou 310058China Department of Immunology&Center for Immunotherapy Institute of Basic Medical SciencesPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100005China

Epigenetic modification,including histone modification,precisely controls target gene *** posttranscriptional regulation of the innate signaling-triggered production of inflammatory cytokines and type I interferons has been fully elucidated,whereas the roles of histone modification alteration and epigenetic modifiers in regulating inflammatory responses need to be further ***/tri-methylation modifications of histone 3 lysine 79(H3K79me2/3)have been shown to be associated with gene transcriptional *** of telomeric silencing-1-like(Dot1l)is the only known exclusive H3K79 methyltransferase and regulates the proliferation and differentiation of tumor ***,the roles of Dot1l and Dot1l-mediated H3K79 methylation in innate immunity and inflammatory responses remain ***,we found that H3K79me2/3 modification levels at the Il6 and Ifnb1 promoters,as well as H3K79me2 modification at the Tnfαpromoter,were increased in macrophages activated by Toll-like receptor(TLR)ligands or virus *** innate signals upregulated Dot1l expression in macrophages and THP1 ***1l silencing or a Dot1l inhibitor preferentially suppressed the production of IL-6 and interferon(IFN)-βbut not of TNFαin macrophages and THP1 cells triggered by TLR ligands or virus ***1l was recruited to the proximal promoter of the Il6 and Ifnb1 but not Tnfαgene and then mediated H3K79me2/3 modification at the Il6 and Ifnb1 promoters,consequently facilitating the transcription and expression of Il6 and ***,Dot1l-mediated selective H3K79me2/3 modifications at the Il6 and Ifnb1 promoters are required for the full activation of innate immune *** finding adds new insights into the epigenetic regulation of inflammatory responses and pathogenesis of autoimmune diseases.

关键词： H3K79me2/3 Dot1l epigenetic regulation IL-6 IFN-β macrophages inflammation

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