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A Search for Solar Axions and Anomalous Neutrino Magnetic Moment with the Complete Panda X-Ⅱ Data

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Chinese Physics Letters 2021年第1期38卷 30-34页

作者：周小朋曾鑫宁宁旭阳阿布都沙拉木·阿布都克力木陈葳谌勋陈云华程晨崔祥仪樊英杰方德清符长波付孟婷耿立升 Karl Giboni 顾琳慧郭绪元韩柯何昶达黄迪黄焱黄彦霖黄周季向东巨永林李帅杰刘华萱刘江来芦晓盈马文博马余刚冒亚军孟月倪恺翔宁金华任祥祥商长松申国防司琳谈安迪王安庆王宏伟王萌王秋红王思广王为王秀丽王舟武蒙蒙吴世勇邬维浩夏经铠肖梦姣谢鹏伟燕斌斌杨继军杨勇喻纯旭袁鞠敏袁影张丹张涛赵力郑其斌周济芳周宁 INPAC School of Physics and AstronomyShanghai Jiao Tong Universityand Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of Physics Beihang UniversityBeijing 100191China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-Ⅱ,in light of the recent event excess reported by XENON1 *** data correspond to a total exposure of 100.7 ton·day with liquid *** robust estimates of the dominant background spectra,we perform sensitive searches on solar axions and neutrinos with enhanced magnetic *** is found that the axionelectron coupling gAe<4.6×10^(-12) for an axion mass less than 0.1 keV/c^(2) and the neutrino magnetic moment μv<4.9×10^(-11)μB at 90%confidence *** observed excess from XENON1 T is within our experimental constraints.

关键词： moment. excess estimates

Determination of responses of liquid xenon to low energy electron and nuclear recoils using a PandaX-Ⅱ detector

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Chinese Physics C 2021年第7期45卷 273-282页

作者：燕斌斌阿布都沙拉木·阿布都克力木陈葳谌勋陈云华程晨崔祥仪樊英杰方德清符长波付孟婷耿立升 Karl Giboni 顾琳慧郭绪元韩柯何昶达黄迪黄沛尧黄焱黄彦霖黄周季向东巨永林李帅杰刘江来雷卓群马文博马余刚冒亚军孟月倪恺翔宁金华宁旭阳任祥祥商长松司琳申国防谈安迪王安庆王宏伟王萌王秋红王思广王为王秀丽王舟武蒙蒙吴世勇邬维浩夏经铠肖梦姣谢鹏伟严锐杨继军杨勇喻纯旭袁鞠敏袁影樊英杰曾鑫宁张丹张涛赵力郑其斌周济芳周宁周小朋 School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

We present a systematic determination of the responses of PandaX-Ⅱ,a dual phase xenon time projection chamber detector,to low energy *** electron recoil(ER) and nuclear recoil(NR) responses are calibrated,respectively,with injected tritiated methane or 220Rn source,and with 241Am-Be neutron source,in an energy range from 1-25 keV(ER) and 4-80 keV(NR),under the two drift fields,400 and 317 V/*** empirical model is used to fit the light yield and charge yield for both types of *** best fit models can describe the calibration data *** systematic uncertainties of the fitted models are obtained via statistical comparison to the data.

关键词： dark matter liquid xenon time projection chamber calibration electron recoil nucleon recoil NEST2.0

血浆蛋白对羊肌原纤维蛋白热诱导凝胶性质的影响

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中国食品学报 2015年第10期15卷 26-34页

作者：倪娜王振宇陈立娟刘金凯夏安琪张德权中国农业科学研究院农产品加工研究所/农业部农产品加工重点实验室北京100193 内蒙古民族大学生命科学学院内蒙古通辽028000

采用质构、动态流变分析等方法,研究不同p H值条件下血浆蛋白含量对羊肉肌原纤维蛋白凝胶特性的影响。研究结果表明,p H 5.0时,血浆蛋白含量对混合蛋白的凝胶硬度、弹性、保水性等影响不大,对其储能模量影响显著(P<0.05);p H 6.2时,血... 详细信息

采用质构、动态流变分析等方法,研究不同p H值条件下血浆蛋白含量对羊肉肌原纤维蛋白凝胶特性的影响。研究结果表明,p H 5.0时,血浆蛋白含量对混合蛋白的凝胶硬度、弹性、保水性等影响不大,对其储能模量影响显著(P<0.05);p H 6.2时,血浆蛋白含量增加可明显改善肌原纤维蛋白的凝胶硬度、保水性(P<0.05),其中血浆蛋白含量为10%时复合肌原纤维蛋白热诱导凝胶的最终储能模量最高;p H 7.5时,血浆蛋白含量的增加降低了肌原纤维蛋白的保水性、硬度、储能模量(P<0.05)。硬度、保水性均较高的复合凝胶具有致密、有序的微观网络结构。SDS-PAGE电泳结果表明,不同p H值条件下,肌球、肌动蛋白发生聚集的时间与血浆蛋白组分并不同步。血浆蛋白对肌原纤维蛋白凝胶特性的改善,可为今后血浆蛋白复合型凝胶类肉制品的研发提供参考。

关键词：血浆蛋白肌原纤维蛋白 pH值凝胶特性微观结构

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碳系复合涂料的制备及其电磁屏蔽性能研究

涂料工业 2015年第8期45卷 21-24,45页

作者：赵海霞夏金童夏霖王双张竞开湖南大学材料科学与工程学院长沙410082 贵州大学管理学院贵阳550025

以水性丙烯酸树脂为基料，鳞片石墨、银粉和炭黑为导电填料，水为溶剂，加入各种分散剂和助剂．制备成水性电磁屏蔽涂料。分析了石墨和银粉的配比、炭黑用量和涂层厚度对涂膜屏蔽性能的影响；结果表明：涂膜的最佳厚度在0．4mm左右；m... 详细信息

以水性丙烯酸树脂为基料，鳞片石墨、银粉和炭黑为导电填料，水为溶剂，加入各种分散剂和助剂．制备成水性电磁屏蔽涂料。分析了石墨和银粉的配比、炭黑用量和涂层厚度对涂膜屏蔽性能的影响；结果表明：涂膜的最佳厚度在0．4mm左右；m（水性丙烯酸树脂）：m（银粉）：m（石墨）：m（炭黑）=5：3：2：0．8，涂膜厚度为（0．4±0．02）mm，8．2～12．4GHz频率范围内涂膜电磁屏蔽效果可达42dB，具有较明显的电磁屏蔽性能。

关键词：碳系复合涂料导电填料电磁屏蔽

剪切角对挤压-剪切法制备AZ31镁合金组织和压缩性能的影响

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稀有金属材料与工程 2021年第2期50卷 416-424页

作者：冯靖凯张丁非袁圆赵阳陈霞柴森森胡红军蒋斌潘复生重庆大学材料科学与工程学院重庆400045 重庆大学国家镁合金材料工程技术研究中心重庆400044 重庆市科学技术研究院重庆401123 重庆理工大学材料科学与工程学院重庆400054 重庆科技学院冶金与材料工程学院重庆401331

采用挤压-剪切法(ES)在不同剪切角(150°、135°和120°)下制备了AZ31棒材。采用ES工艺制备的棒材,包括直接挤压和后续剪切两部分。随后采用光学显微镜、扫描电镜和电子背散射衍射(EBSD)等方法研究了具有双峰晶粒结构的AZ31镁合金的显... 详细信息

采用挤压-剪切法(ES)在不同剪切角(150°、135°和120°)下制备了AZ31棒材。采用ES工艺制备的棒材,包括直接挤压和后续剪切两部分。随后采用光学显微镜、扫描电镜和电子背散射衍射(EBSD)等方法研究了具有双峰晶粒结构的AZ31镁合金的显微组织演变,从取向分布图中可清晰的观察到细晶粒包围狭长变形粗晶的混晶结构,且大晶粒区域的占比会随应变的增加而增大。整体来看,因为应变量和动态再结晶分数都会随着剪切角的减小而增加,导致大晶粒的占比增大,而小晶粒尺寸增加。室温压缩实验中,随着剪切角的减小,屈服强度和峰值强度逐渐增大。此外,ES挤压的基面极图也会随着剪切角度的不同发生变化。

关键词：挤压-剪切镁合金混晶 EBSD 压缩

血清内脂素水平与高血压分级相关性的初步探讨

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临床心血管病杂志 2014年第9期30卷 762-766页

作者：吴刚勇宗刚军王霄夏阳陈景开中国人民解放军第一零一医院心内科江苏无锡214044

目的:探讨血清内脂素水平与高血压分级之间的相关性。方法:入选52例新诊断的高血压患者和38例健康志愿者作对照组,依据高血压分级标准将高血压组分为高血压1级和2级两个亚组,对照组分为正常血压和高血压前期两个亚组。每名入选者均测定... 详细信息

目的:探讨血清内脂素水平与高血压分级之间的相关性。方法:入选52例新诊断的高血压患者和38例健康志愿者作对照组,依据高血压分级标准将高血压组分为高血压1级和2级两个亚组,对照组分为正常血压和高血压前期两个亚组。每名入选者均测定血压、体重、身高、血脂、血糖、高敏C反应蛋白及内脂素水平。运用等级相关分析判断高血压分级与内脂素水平的相关性,进一步运用多元线性回归分析模型判断血压分级与内脂素水平之间的独立联系。结果:4个亚组间患者的年龄、血糖、总胆固醇、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇及三酰甘油水平差异无统计学意义(P>0.05)。体质指数、收缩压、舒张压、高敏C反应蛋白及内脂素水平差异有统计学意义(P<0.05)。高血压分级与内脂素水平之间的等级相关系数r为0.819(P=0.000)。多元线性回归分析示只有收缩压水平对内脂素的影响有高度统计学意义(标准化系数0.903,P=0.000)。内脂素与收缩压的相关性有统计学意义(r=0.774,P=0.000)。结论:内脂素水平与高血压分级之间呈高度正相关。

关键词：内脂素炎性细胞因子内皮细胞高血压

含深共熔溶剂体系中晶胶微球固定化分枝杆菌生产雄烯二酮研究

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化学反应工程与工艺 2021年第1期37卷 47-54页

作者：何京锴肖霞楼小玲贠军贤关怡新姚善泾浙江大学化学工程与生物工程学院浙江杭州310027 浙江工业大学化学工程学院绿色化学合成技术国家重点实验室培育基地浙江杭州310032

分枝杆菌全细胞催化的选择性植物甾醇侧链降解反应可用于生产甾体药物重要中间体雄烯二酮(AD),由于存在底物低水溶解度和产物抑制与降解等问题,该反应的转化效率较低。深共熔溶剂(DESs)是一种新型的绿色溶剂,可以作为助溶剂有效促进底... 详细信息

分枝杆菌全细胞催化的选择性植物甾醇侧链降解反应可用于生产甾体药物重要中间体雄烯二酮(AD),由于存在底物低水溶解度和产物抑制与降解等问题,该反应的转化效率较低。深共熔溶剂(DESs)是一种新型的绿色溶剂,可以作为助溶剂有效促进底物溶解。本研究在甜菜碱(Bet)与麦芽糖(Mal)或半乳糖(Gal)组成的2种DESs构成的转化体系中,以甲基丙烯酸羟乙酯和甲基丙烯酸正丁酯聚合的晶胶微球为基质,研究了固定化分枝杆菌细胞降解植物甾醇侧链生产AD的过程。结果表明:晶胶微球能够有效分散细胞,提高了细胞利用率,固定化后单位细胞AD产量提高了6.8倍。DESs可缓解AD降解和减少AD在晶胶微球内的累积,经过3批次半连续转化后,在含10%体积分数Bet/Mal体系中的单位细胞干重(DCW)的总AD产量可达401.4 mg/g,是缓冲液体系悬浮培养细胞的12倍。在含DESs体系中晶胶微球固定化分枝杆菌能促进植物甾醇降解从而提高AD产量,具有潜在的工业应用前景。

关键词：雄烯二酮分枝杆菌晶胶微球深共熔溶剂固定化细胞

Searching for neutrino-less nouble neta necay of 136Xe with PandaX-Ⅱ liquid xenon detector

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Chinese Physics C 2019年第11期43卷 1-10页

作者：倪恺翔赖奕辉阿布都沙拉木·阿布都克力木陈葳谌勋陈云华崔祥仪樊英杰方德清符长波耿立升 Karl Giboni Franco Giuliani 顾琳慧郭绪元韩柯何昶达黄迪黄焱黄彦霖黄周吉鹏季向东巨永林梁昆刘华萱刘江来马文博马余刚冒亚军孟月 Parinya Namwongsa 宁金华宁旭阳任祥祥商长松司琳谈安迪王安庆王宏伟王萌王秋红王思广王秀丽王舟武蒙蒙吴世勇夏经铠肖梦姣谢鹏伟燕斌斌杨继军杨勇喻纯旭袁鞠敏张丹张宏光张涛赵力郑其斌周济芳周宁周小朋 INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Nankai UniversityTianjin 300071China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China

We report the Neutrino-less Double Beta Decay(NLDBD)search results from PandaX-II dual-phase liquid xenon time projection *** total live time used in this analysis is 403.1 days from June 2016 to August *** NLDBD-optimized event selection criteria,we obtain a fiducial mass of 219 kg of natural *** accumulated xenon exposure is 242 kg·yr,or equivalently 22.2 kg·yr of 136Xe *** the region around 136Xe decay Q-value of 2458 keV,the energy resolution of PandaX-II is 4.2%.We find no evidence of NLDBD in PandaX-II and establish a lower limit for decay half-life of 2.1 ×10^23 yr at the 90%confidence level,which corresponds to an effective Majorana neutrino mass mββ<(1.4-3.7) *** is the first NLDBD result reported from a dual-phase xenon experiment.

关键词： neutrino-less double beta decay dark matter underground physics liquid xenon detector

Results of dark matter search using the full PandaX-Ⅱ exposure

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Chinese Physics C 2020年第12期44卷 184-200页

作者：王秋红阿布都沙拉木·阿布都克力木陈葳谌勋陈云华程晨崔祥仪樊英杰方德清符长波付孟婷耿立升 Karl Giboni 顾琳慧郭绪元韩柯何昶达黄迪黄焱黄彦霖黄周季向东巨永林李帅杰刘华萱刘江来马文博马余刚冒亚军孟月倪恺翔宁金华宁旭阳任祥祥商长松司琳申国防谈安迪王安庆王宏伟王萌王思广王为王秀丽王舟武蒙蒙吴世勇邬维浩夏经铠肖梦姣谢鹏伟燕斌斌杨继军杨勇喻纯旭袁鞠敏袁影曾鑫宁张丹张涛赵力郑其斌周济芳周宁周小朋 INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Lab for Particle PhysicsAstrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

We report the dark matter search results obtained using the full 132 ton·day exposure of the PandaX-II experiment,including all data from March 2016 to August *** significant excess of events is identified above the expected *** limits are set on the spin-independent dark matter-nucleon *** lowest 90%confidence level exclusion on the spin-independent cross section is 2.2×10−46 cm2 at a WIMP mass of 30 GeV/c2.

关键词： dark matter direct detection liquid xenon