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Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

Nuclear science and Techniques 2019年第9期30卷 73-82页

作者： Xing-Yan Liu Yi-wei Yang Rong Liu jie Wen Zhong-wei Wen Zi-jie Han Zhi-Zhou Ren Qi An Huai-Yong Bai jie Bao Ping Cao Qi-Ping Chen Yong-Hao Chen Pin-Jing Cheng Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Min-Hao Gu Feng-Qin Guo Chang-Cai Han Guo-zhu He Yong-Cheng He Yue-Feng He Han-Xiong Huang wei-Ling Huang Xi-Ru Huang Xiao-Lu Ji Xu-Yang Ji Hao-Yu Jiang wei Jiang Han-Tao Jing Ling Kang Ming-Tao Kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Shu-Bin Liu Guang-Yuan Luan Ying-Lin Ma Chang-jun Ning Bin-Bin Qi jie Ren Xi-Chao Ruan Zhao-Hui Song Hong Sun Xiao-Yang Sun Zhi-Jia Sun Zhi-Xin Tan Hong-Qing Tang Jing-Yu Tang Peng-Cheng wang Qi wang Tao-Feng wang Yan-Feng wang Zhao-Hui wang Zheng wang Qing-Biao Wu Xiao-Guang Wu Xuan Wu Li-Kun Xie Han Yi Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Jing Zhang Lin-Hao Zhang Li-Ying Zhang Qing-Min Zhang Qi-wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Ying-Tan Zhao Liang Zhou Zu-Ying Zhou Dan-Yang zhu Ke-jun zhu Peng zhu Institute of Nuclear Physics and chemistry China Academy of Engineering Physics state key laboratory of Particle Detection and Electronics Chinese Academy of Sciences(CAS) Department of Modern Physics University of Science and Technology of China state key laboratory of Nuclear Physics and Technology School of PhysicsPeking University key laboratory of Nuclear Data China Institute of Atomic Energy Institute of High Energy Physics Chinese Academy of Sciences(CAS) Spallation Neutron Source science Center University of South China Northwest Institute of Nuclear Technology Department of Engineering and Applied Physics University of Science and Technology of China Beihang University Xi’an Jiaotong University

To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 20 MeV using the time-of-flight method. The measurement is performed at the Back-n white neutron source with a 76-m time-of-flight path using the China Spallation Neutron Source. A multilayer fast fission chamber with 235U and 238U is employed as the neutron detector. The diameter and thickness of the natural graphite sample are 70 mm and 40 mm, respectively. Signal waveforms are collected using a data acquisition system. Off-line data processing was used to obtain the neutron time-of-flight spectra and transmissions. The uncertainty of the counting statistics is generally approximately 3% for each bin in the energy range of 1–20 MeV. It is determined that the results for the neutron total cross section of carbon obtained using ^235U cells are in good agreement with the results obtained using 238U cells within limits of statistical uncertainty. Moreover, the measured total cross sections show good agreement with the broadening evaluated data.

关键词： CSNS Back-n white neutron source NTOX Neutron total cross section Carbon Multilayer fast fission chamber

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The C_(6)D_(6)detector system on the Back-n beam line of CSNS

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Radiation Detection Technology and Methods 2019年第3期3卷 274-282页

作者： jie Ren Xichao Ruan jie Bao Guangyuan Luan wei Jiang Qi An Huaiyong Bai Ping Cao Qiping Chen Yonghao Chen Pinjing Cheng Zengqi Cui Ruirui Fan Changqing Feng Minhao Gu Fengqin Guo Changcai Han Zijie Han Guozhu He Yongcheng He Yuefeng He Hanxiong Huang weiling Huang Xiru Huang Xiaolu Ji Xuyang Ji Haoyu Jiang Hantao Jing Ling Kang Mingtao Kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Rong Liu Shubin Liu Xingyan Liu Yinglin Ma Changjun Ning Binbin Qi Zhaohui Song Hong Sun Xiaoyang Sun Zhijia Sun Zhixin Tan Hongqing Tang Jingyu Tang Pengcheng wang Qi wang Taofeng wang Yanfeng wang Zhaohui wang Zheng wang jie Wen Zhongwei Wen Qingbiao Wu Xiaoguang Wu Xuan Wu Likun Xie Yiwei Yang Han Yi Li Yu Tao Yu Yongji Yu Guohui Zhang Jing Zhang Linhao Zhang Liying Zhang Qingmin Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Yingtan Zhao Liang Zhou Zuying Zhou Danyang zhu Kejun zhu Peng zhu key laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Dongguan Neutron science Center Dongguan 523803China state key laboratory of Particle Detection and Electronics HefeiChina 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 University of South China Hengyang 421001China Northwest Institute of Nuclear Technology Xi’an 710024China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China Xi’an Jiaotong University Xi’an 710049China Beihang University Beijing 100083China

Introduction The neutron capture cross sections are very important in the field of nuclear device design and basic physics ***-free liquid scintillator such as C_(6)D_(6)detectors are widely used in the neutron capture cross-sectional measurements for the low neutron sensitivity and fast time *** Back-n white neutron source at China Spallation Neutron Source is the first spallation white neutron source in China,and it is suitable for neutron capture cross-sectional *** and methods A C_(6)D_(6)detector system was built in the Back-n experimental *** pulse height weighting technique was used to determine the system’s detection *** response to gamma rays of the C_(6)D_(6)detector was measured,and the energy resolution function was *** Carlo simulation with Geant4 code was carried out to get the weighting function of this C_(6)D_(6)detector ***,the systematic uncertainty of the weighting function was also *** According to the experimental and simulation results,this C_(6)D_(6)detector system can be used to measure neutron capture cross section.

关键词： C6D6 detector PHWT Neutron capture cross section White neutron source

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碱金属赋存形态对水稻秸秆热解过程的影响机制

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燃料化学学报 2021年第6期49卷 752-758页

作者：张玉洁王焦飞卫俊涛白永辉宋旭东苏暐光于广锁宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021 南京林业大学材料科学与工程学院生物质能源与材料国际合作实验室江苏南京210037 华东理工大学洁净煤技术研究所上海200237

碱金属是生物质热解过程的重要影响因素。本研究以含不同赋存形态碱金属的水稻秸秆(RS)为研究对象,采用热重-质谱联用仪(TG-MS)和热裂解-气质联用仪(Py-GC/MS)研究其热解特性、小分子气体的释放规律及原位热解焦油组成变化规律,以揭示... 详细信息

碱金属是生物质热解过程的重要影响因素。本研究以含不同赋存形态碱金属的水稻秸秆(RS)为研究对象,采用热重-质谱联用仪(TG-MS)和热裂解-气质联用仪(Py-GC/MS)研究其热解特性、小分子气体的释放规律及原位热解焦油组成变化规律,以揭示不同赋存形态碱金属在热解过程中的作用机理。结果表明,随水稻秸秆碱金属脱除程度的提高,热解过程中小分子释放温度向高温区域偏移,碱金属对小分子逸出过程存在催化作用。而不同赋存形态的碱金属对焦油组分的影响不同。水溶性碱金属抑制了醇类物质的产生而促进酮类和醛类的生成。离子交换态碱金属在不同温度下对油品组成的影响不同,在300℃热解时抑制了醛类和醚类的产生,促进了酯类和酮类的生成,而热解温度高于400℃后则相反。动力学分析表明,水溶性碱金属离子和交换态碱金属均会降低生物质热解活化能。

关键词：秸秆热解碱金属赋存形态焦油

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环糊精多孔聚合物对水中染料分子的吸附性能及主客效应

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环境科学 2022年第2期43卷 907-919页

作者：赵传靓王子婕闫仪徐慧周俊垣杨利伟王东升长安大学建筑工程学院西安710061 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085 西北化工研究院有限公司西安710061

环糊精能够与多种有机污染物形成主-客体包合物,对去除水中种类复杂的染料分子具有独特的优势.利用刚性交联剂交联制备出了环糊精多孔聚合物(P-CDP),借助FT-IR、XPS、SEM和BET等技术对P-CDP结构进行表征,采用等温吸附和动力学吸附实验研... 详细信息

环糊精能够与多种有机污染物形成主-客体包合物,对去除水中种类复杂的染料分子具有独特的优势.利用刚性交联剂交联制备出了环糊精多孔聚合物(P-CDP),借助FT-IR、XPS、SEM和BET等技术对P-CDP结构进行表征,采用等温吸附和动力学吸附实验研究P-CDP对染料的吸附过程,并通过竞争实验探究P-CDP对水中染料分子的包合吸附性能及主客效应.结果表明,P-CDP热稳定性强,具有微孔结构,比表面积为108.745 m^(2)·g^(-1);Langmuir模型和准二级动力学模型对吸附过程的拟合度更高;吸附过程中静电作用强于主客效应,与环糊精空腔的匹配度高的污染物所形成的包合物的稳定性强,疏水性强的污染物更容易被包合于环糊腔内.P-CDP吸附染料后,洗脱再生5次后的去除率仍能达到80%以上.结果表明,P-CDP在染料废水处理中具有潜在的应用价值.

关键词：环糊精聚合物主客效应包合吸附疏水腔染料废水

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Correction To:Dietary folate drives methionine metabolism to promote cancer development by stabilizing MAT IIA

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Signal Transduction and Targeted Therapy 2023年第1期8卷 318-318页

作者： Jin-Tao Li Hai Yang Ming-zhu Lei wei-Ping zhu Ying Su Kai-Yue Li Wen-Ying zhu Jian wang Lei Zhang Jia Qu Lei Lv Hao-jie Lu Zheng-jun Chen Lu wang Miao Yin Qun-Ying Lei Fudan University Shanghai Cancer Center & Institutes of Biomedical sciences Cancer Institutes key laboratory of Breast Cancer in Shanghai Shanghai key laboratory of Radiation Oncology the Shanghai Key Laboratory of Medical Epigenetics Department of Oncology Shanghai Medical College Fudan University Shanghai 200032 People’s Republic of China state key laboratory of Medical Neurobiology Fudan University Shanghai 200032 People’s Republic of China Department of Hepatic Surgery Fudan University Shanghai Cancer Center Shanghai Medical College Fudan University Shanghai 200032 People’s Republic of China MOE key laboratory of Metabolism and Molecular Medicine Department of Biochemistry and Molecular Biology School of Basic Medical Sciences Fudan University Shanghai 200032 People’s Republic of China state key laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell Biology Center for Excellence in Molecular Cell Science Chinese Academy of Sciences (CAS) School of Life Science and Technology Shanghai Tech University Shanghai 200032 People’s Republic of China

Correction to:Signal Transduction and Targeted Therapy https://***/10.1038/s41392-022-01017-8,published online 22 june 2022 In the process of collating the raw data,the authors noticed one inadvertent mistake occurred in Fig.2e that needs to be corrected in the *** correct data are provided as *** key findings of the article are not affected by the *** original article has been corrected.

关键词： metabolism corrected Therapy

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Efficacy and safety of the long-acting fusion inhibitor albuvirtide in antiretroviral-experienced adults with human immunodeficiency virus-1:interim analysis of the randomized,controlled,phase 3,non-inferiority TALENT study

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Chinese Medical Journal 2020年第24期133卷 2919-2927页

作者： Bin Su Cheng Yao Qing-Xia Zhao wei-Ping Cai Min wang Hong-Zhou Lu Yuan-Yuan Chen Li Liu Hui wang Yun He Yu-Huang Zheng Ling-Hua Li Jin-Feng Chen Jian-Hua Yu Biao zhu Min Zhao Yong-Tao Sun Wen-Hui Lun wei Xia Li-jun Sun Li-Li Dai Tai-Yi Jiang Mei-Xia wang Qing-Shan Zheng Hai-Yan Peng Yao wang Rong-Jian Lu Jian-Hua Hu Hui Xing Yi-Ming Shao Dong Xie Tong Zhang Fu-jie Zhang Hao Wu TALENT Study Team Center for Infectious Diseases Beijing Youan HospitalCapital Medical UniversityBeijing 100069China Frontier Biotechnologies Inc. NanjingJiangsu 211122China Department of Infectious Diseases Infectious Disease Hospital of Henan ProvinceZhengzhouHenan 450061China Infectious Disease Center Guangzhou Eighth People’s HospitalGuangzhou Medical UniversityGuangzhouGuangdong 510060China Institute of HIV/AIDS The First Hospital of ChangshaChangshaHunan 410005China Department of Infectious Diseases Shanghai Public Health Clinical CenterFudan UniversityShanghai 201508China Department of Infectious Diseases National Clinical Center for Infectious DiseasesShenzhen Third People’s HospitalShenzhenGuangdong 518112China Department of Infectious Diseases The Second Xiangya HospitalCentral South UniversityChangshaHunan 410011China Department of Infectious Diseases Xixi Hospital of HangzhouHangzhouZhejiang 310023China state key laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesThe First Affiliated HospitalZhejiang UniversityHangzhouZhejiang 310003China National Clinical Research Center for Infectious Diseases the Fifth Medical Center of PLA General HospitalBeijing 100039China Department of Infectious Diseases Tangdu HospitalThe Fourth Military Medical UniversityXi’anShaanxi 710038China Clinical and Research Center of Infectious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Center for Drug Clinical Research Shanghai University of Traditional Chinese MedicineShanghai 201203China Beijing Co-CRO Medical Development Co. Ltd.Beijing 100711China state key laboratory for Infectious Disease Prevention and Control National Center for AIDS/STD Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China 不详

Background:Albuvirtide is a once-weekly injectable human immunodeficiency virus(HIV)-1 fusion *** present interim data for a phase 3 trial assessing the safety and efficacy of albuvirtide plus lopinavir-ritonavir in HIV-1-infected adults already treated with antiretroviral ***:We carried out a 48-week,randomized,controlled,open-label non-inferiority trial at 12 sites in *** on the World Health Organization(WHO)-recommended first-line treatment for>6 months with a plasma viral load>1000 copies/mL were enrolled and randomly assigned(1:1)to receive albuvirtide(once weekly)plus ritonavir-boosted lopinavir(ABT group)or the WHO-recommended second-line treatment(NRTI group).The primary endpoint was the proportion of patients with a plasma viral load below 50 copies/mL at 48 ***-inferiority was prespecified with a margin of 12%.Results:At the time of analysis,week 24 data were available for 83 and 92 patients,and week 48 data were available for 46 and 50 patients in the albuvirtide and NRTI groups,*** 48 weeks,80.4%of patients in the ABT group and 66.0%of those in the NRTI group had HIV-1 RNA levels below 50 copies/mL,meeting the criteria for *** the per-protocol population,the superiority of albuvirtide over NRTI was *** frequency of grade 3 to 4 adverse events was similar in the two groups;the most common adverse events were diarrhea,upper respiratory tract infections,and grade 3 to 4 increases in triglyceride *** function was significantly more impaired at 12 weeks in the patients of the NRTI group who received tenofovir disoproxil fumarate than in those of the ABT ***:The TALENT study is the first phase 3 trial of an injectable long-acting HIV *** interim analysis indicates that once-weekly albuvirtide in combination with ritonavir-boosted lopinavir is well tolerated and non-inferior to the WHO-recommended second-line regimen in patients with first-line treatme

关键词： HIV Fusion inhibitor Albuvirtide LPV/r Phase 3 clinical trial

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低占空比红外增强吸收的量子阱微柱阵列

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红外与毫米波学报 2021年第1期40卷 1-6页

作者：叶新辉谢天夏辉陈熙仁李菊柱张帅君姜新洋邓伟杰王文静李玉莹刘伟伟刘芳李天信上海理工大学材料科学与工程学院上海200093 中国科学院上海技术物理研究所红外物理国家重点实验室上海200083 上海师范大学数理学院上海200234 上海科技大学物质科学与技术学院上海201210

为了提高长波红外量子阱探测器的光耦合效率和信噪比,以8.7μm为中心波长,设计和制备了量子阱亚波长微柱阵列结构。与已经报道的金属或介质微腔结构不同,本文的微柱结构有源区包含50周期的量子阱/垒层,结合低至0.18的占空比,可望在增强... 详细信息

为了提高长波红外量子阱探测器的光耦合效率和信噪比,以8.7μm为中心波长,设计和制备了量子阱亚波长微柱阵列结构。与已经报道的金属或介质微腔结构不同,本文的微柱结构有源区包含50周期的量子阱/垒层,结合低至0.18的占空比,可望在增强吸收的同时显著抑制暗电流。红外光谱测量验证了制备的微柱阵列在8~9μm波段8%以内的低反射率特征,从而为高工作温度、高信噪比的长波红外探测提供了新方案。

关键词：量子阱红外探测器亚波长微柱阵列占空比红外反射谱

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白洋淀府河影响区沉积物营养盐和重金属污染特征及风险评价

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环境科学 2022年第1期43卷 230-238页

作者：陈兴宏李立青张美一张伟军王东升王洪杰中国地质大学环境学院武汉430074 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085 河北大学生命科学学院生态与环境治理研究所保定071002

根据府河入淀水流的扩散,将府河影响区分为6个片区,2020年10月分层采集48个样点的沉积物,测定并研究白洋淀府河影响区沉积物营养盐和重金属污染特征及风险.结果表明,研究区域沉积物中平均ω(TN)、ω(TP)和ω(TOC)分别为1841 mg·kg^(-1)... 详细信息

根据府河入淀水流的扩散,将府河影响区分为6个片区,2020年10月分层采集48个样点的沉积物,测定并研究白洋淀府河影响区沉积物营养盐和重金属污染特征及风险.结果表明,研究区域沉积物中平均ω(TN)、ω(TP)和ω(TOC)分别为1841 mg·kg^(-1)、769 mg·kg^(-1)和1.77%.沉积物重金属污染的主要元素为Cd、Cu、Zn、Hg和Pb,分别是区域土壤背景值的3.73、1.50、1.42、1.31和1.31倍.由府河入淀区、南刘庄至下游枣林庄方向,沉积物中TP和重金属(Cd、Cu、Zn、Hg和Pb)含量呈现明显减少规律,而TN和TOC含量没有明显规律.沉积物中TN、TP、TOC和重金属(Cd、Cu、Zn、Hg和Pb)主要蓄积在表层0~10 cm.府河入淀、府河-南刘庄和南刘庄片区沉积物TP属于重度污染等级,王家寨和光淀片区沉积物TP属于中度污染等级,枣林庄片区沉积物TP属于轻度污染等级.Cd和Hg是重金属主要污染贡献因子,分别为较重污染和中等污染等级.府河入淀、府河-南刘庄和南刘庄片区沉积物重金属属于重度生态风险等级,王家寨和光淀片区属于中等生态风险等级,枣林庄片区属于低生态风险等级.重度生态风险等级区域的沉积物重金属浸出浓度低于浸出毒性鉴别标准值,清淤后可作一般废物处理.

关键词：白洋淀府河影响区营养盐重金属污染特征

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新型超支化受阻酚类抗氧剂清除自由基能力研究

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分子科学学报 2018年第6期34卷 465-471,I0002页

作者：李翠勤孙鹏葛腾杰王华康伟伟王俊东北石油大学化学化工学院石油与天然气化工省重点实验室黑龙江大庆163318 中国石油大庆化工研究中心黑龙江大庆163714

采用DPPH法和测氧法研究了新型超支化受阻酚类抗氧剂对DPPH·和ROO·的清除能力.结果表明:超支化受阻酚类抗氧剂清除自由基能力不仅与抗氧剂的结构有关,还与抗氧化条件有关.其清除自由基能力随着超支化受阻酚类抗氧剂浓度的增加而增加,... 详细信息

采用DPPH法和测氧法研究了新型超支化受阻酚类抗氧剂对DPPH·和ROO·的清除能力.结果表明:超支化受阻酚类抗氧剂清除自由基能力不仅与抗氧剂的结构有关,还与抗氧化条件有关.其清除自由基能力随着超支化受阻酚类抗氧剂浓度的增加而增加,随着超支化受阻酚类抗氧剂中烷基链长度的增加而降低.以正十四胺为核的超支化受阻酚类抗氧剂(R14-phenol)具有最好的清除自由基能力,清除DPPH·的速率最快,稳态时清除率为84%;抑制苯乙烯氧化的时间为2384s,抑制速率常数为7.07×105mol^-1·L^-1·s^-1.

关键词：超支化受阻酚抗氧化性能 DPPH· ROO·

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Near-Infrared Emission based on Platinum Complexes for Solution-Processed Polymer Light-Emitting Diodes

Near-Infrared Emission based on Platinum Complexes for Solut...

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中国化学会第十三届全国有机合成化学学术研讨会

作者： Zhang You-Ming Meng Fan-Yuan You Cai-Fa Yang Sheng-Yi Xiong Wen-Jing Yu jun-Ting wang Ya-Fei Su Shi-Jian zhu wei-Guo School of Materials science and Engineering Changzhou University College of chemistry Xiangtan University state key laboratory of Luminescent Materials and Devices South China University of Technology College of chemistry and Chemical Engineering Hunan University of Science and Technology

In the past decade,near-infrared（NIR）-emitting materials have drawn great attention in the solution-processed polymer light-emitting diodes（PLEDs） with potential applications in night-vision displays,sensors,optical communication,and medical *** highest maximum external quantum efficiency（EQE） of 14.7% was demonstrated in these platinum-based NIR emission *** order to deveolp new NIR-emitting platinum complexes and further study their structure-property relationship,some D-A-type mono-and bi-nuclear cyclometalated platinum complexes were designed and synthesized with multiple donor（D） units of triphenylamine（TPA） or carbazole（Cz） and acceptor（A） units of benzothiadiazol（BT） or phenazine（PZ）.By tuning coordination configuration,D-A framework and linking positions,these mono-and bi-nuclear cyclometalated platinum complexes exhibited significantly different electroluminescence performance in the *** these PLEDs with a configuration of ITO/PEDOT（40 nm）/PVK:complexes（50-60 nm）/TPBI（30 nm）/Ba（4 nm）/Al,the highest EQE of 0.85% and a radiance of 164 μW/cm2 at an electroluminescent peak of 750 nm are obtained.

关键词： Near-infrared emission Donor-accepter Platinum complexes Polymer light-emitting diodes

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