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Significantly Improved Stereocomplexation Ability in Cyclic Block Copolymers

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Chinese Journal of Polymer Science 2023年第3期41卷 432-441,I0009页

作者： Qian zhu Zhi-ping Zhou Tong-Fan Hao Yi-jing Nie Research School of Polymeric Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China

Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo *** polymer systems(linear polymer blend,linear diblock copolymer,cyclic polymer blend,cyclic diblock copolymer and tetrablock copolymer)were *** was interestingly found that the cyclic polymer blend exhibited the weakest stereocomplexation ability,while the two cyclic block copolymers showed stronger stereocomplexation ability than the linear diblock *** abnormal improved stereocomplexation ability of the cyclic block copolymers can be attributed to the synergy between the ring chain topology and the block copolymer *** with the linear block copolymers,the ring chain topology confined segmental motions of cyclic polymer chains to smaller regions,and then the segments belonging to the different blocks in the cyclic block copolymers have more chance to contact with each *** this way,the cyclic block copolymers had better miscibility between segments belonging to different types of blocks,leading to the stronger stereocomplexation ability.

关键词： Monte Carlo simulation Stereocomplex crystallization Ring chain topology Cyclic block copolymers

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响应面法优化低熔点牛油的分提工艺

粮食与油脂 2024年第1期37卷 55-58,63页

作者：赵旭珠赵静靳春平张鹭艳邹强成都大学食品与生物工程学院四川成都610106

以正己烷为溶剂,采用超声波辅助溶剂分提低熔点牛油,在单因素试验基础上,利用响应面法优化低熔点牛油的分提工艺。结果表明:低熔点牛油的最佳分提工艺为超声时间123min、超声温度49℃、料液比1:8(g/mL),在此条件下低熔点牛油的油脂得率... 详细信息

以正己烷为溶剂,采用超声波辅助溶剂分提低熔点牛油,在单因素试验基础上,利用响应面法优化低熔点牛油的分提工艺。结果表明:低熔点牛油的最佳分提工艺为超声时间123min、超声温度49℃、料液比1:8(g/mL),在此条件下低熔点牛油的油脂得率为32.1.%、熔点为0.19℃、感官评分为31.07。

关键词：牛油超声波响应面法分提熔点

Comparisons of Handover Initiation in a New Multi-cell Cellular Networks with Multi-beam Antennas

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Comparisons of Handover Initiation in a New Multi-cell Cellu...

二维范德瓦耳斯异质结Cs_(3)X_(2)I_(9)/InSe(X=Bi,Sb)的光电性能

2003 International Conference on Communication technology

作者： Zhang Zu-fanDu Hui-ping zhu Wei-le and Yang jing Chongqing university of Posts and Telecommunications university of Electronic Science and technology of china

A new multi-cell cellular configuration networks is provided for analysis of handover initiation probability, which is based on multi-beam base-station antenna splitting in the elevation-radiating pla

关键词： Handover initiation probability multi-beam antennas mobile communication.

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物理学报 2024年第13期73卷 229-237页

作者：熊祥杰钟防张资文陈芳罗婧澜赵宇清朱慧平蒋绍龙湖南科技大学物理与电子科学学院智能传感器与新型传感器材料湖南省重点实验室湘潭411201 格拉斯哥大学亚当史密斯学院格拉斯哥G128QQ 中国科学院微电子研究所硅器件技术重点实验室北京100029 粤港澳大湾区(广东)量子科学中心深圳518045

设计二维半导体范德瓦耳斯异质结是一种实现多功能微电子器件的有效策略.本文构筑了二维钙钛矿Cs_(3)X_(2)I_(9)(X=Bi,Sb)和铟锡InSe的范德瓦耳斯异质结Cs_(3)X_(2)I_(9)/InSe.基于密度泛函理论的第一性原理方法,计算了其几何、电子结... 详细信息

设计二维半导体范德瓦耳斯异质结是一种实现多功能微电子器件的有效策略.本文构筑了二维钙钛矿Cs_(3)X_(2)I_(9)(X=Bi,Sb)和铟锡InSe的范德瓦耳斯异质结Cs_(3)X_(2)I_(9)/InSe.基于密度泛函理论的第一性原理方法,计算了其几何、电子结构、光学性质.研究表明,二维Cs3Bi2I9/InSe和Cs3Sb2I9/InSe异质结为II型能带排列,且带隙分别为1.61 eV和1.19 eV,可见光和紫外光范围内具有较高的吸收系数.基于形变势理论和类氢原子模型的计算,二维Cs_(3)X_(2)I_(9)/InSe异质结显示了较高的电子迁移速率和激子结合能.基于Ⅱ型排列的能带结构和肖克利-奎伊瑟极限(Shockley-Queisser limit),对比研究了光电转换效率.此外,进一步探究了双轴应变对二维异质结Cs_(3)X_(2)I_(9)/InSe光电特性的调控及其规律.上述研究为未来设计高效的二维范德瓦耳斯光电子器件提供了理论依据.

关键词：二维异质结光电转换效率第一性原理计算应变工程

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Antigen-binding characteristics of AbCD71 and its inhibitory effect on PHA-induced lymphoproliferation

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Acta Pharmacologica Sinica 2007年第10期28卷 1659-1664页

作者： ping LEI~2,Yong HE~3,Qing YE~4,Hui-fen zhu~2,Xiao-mei YUAN~2,jing LIE~2,Wei XING~2,Sha WU~2,Wei DAI~2,Xin SHEN~2,Guo-bin WANG~(5,6),Guan-xin SHEN~(2,6)Departments of ~2 Immunology and Pharmacology,~3 Nuclear Medicine and ~5 Surgery,Union Hospital,Tongji Medical College,Huazhonguniversity of Science and technology,Wuhan 430030,china ~4 Department of Pathobiology and Physiology,Medicine and Life ScienceCollege of Jianghan university,Wuhan 430056,china Department of Immunology and Pharmacology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China Department of Nuclear Medicine Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China Department of Pathobiology and Physiology Medicine and Life Science College of Jianghan University Wuhan China Department of Surgery Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China

Aim:To investigate the anti-lymphoproliferative effect of the prepared recombi-nant chimeric human/murine anti-cluster of differentiation（CD） 71 monoclonalantibody （AbCD71）,which is composed of mouse-derived,antigen-binding vari-able regions and human-derived constant ***:After plasmids con-struction and transfection,the expression of AbCD71 in the transfectoma super-natant was determined by the sandwich *** immunofluorescence as-say was used to measure the antigen-binding characteristic and the percent CD71-expressed peripheral blood mononuclear cells （PBMC）.The antibodies were puri-fied from the ascites via diethylaminoethyl（DEAE）-Sephadex A-50 chromatogra-phy and then identified by *** last,inhibitory effect of AbCD71 onPHA-induced PBMC proliferation was calculated by methyl thiazolyl tetrazolium（MTT） ***:Constant domain of heavy chain（CH） and light chain（CL）ofAbCD71 were in the human Cγfamily and human CKfamily,***71could compete with its original murine mAb to bind with CD71-positive humanleukemia cell line CEM ***71 could inhibit the peripheral blood mono-nuclear cell proliferation induced by phytohemagglutinin（PHA） in vitro in a dose-dependent manner,especially at time-points 0 and 12 h after *** wasno statistical difference when compared with original murine ***:The AbCD71 is a promising *** approach to blocking CD71with the chimeric human/murine mAb provides a novel strategy for prolongingallograft survival.

关键词： AbCD71 chimeric human/murine antibody lymphoproliferation transplantation rejection

Synthesis and Characterization of Phenylethynyl-terminated Polyimide Oligomers Derived from 2,3,3',4'-Diphenyl Ether Tetracarboxylic Acid Dianhydride and 3,4'-Oxydianiline

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Chinese Journal of Polymer Science 2016年第1期34卷 122-134页

作者： ping Yu Yan Wang Jun-rong Yu jing zhu 胡祖明 State Key laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China College of Materials Science and Engineering Donghua UniversityShanghai 201620China

With the goal of improving processability of imide oligomers and achieving high toughness of thermosetting polyimides, a series of 4-phenylethynylphthalic anhydride（PEPA）-terminated imide oligomers prepared by the reaction of 2,3,3＇,4＇-diphenyl ether tetracarboxylic acid dianhydride（a-ODPA） and 3,4＇-oxydianiline（3,4＇-ODA） with different molecular weights（degree of polymerization： n = 1？9） were formed. The resultant oligomers with different molecular weights were characterized for their chemical architecture, cure behavior, thermal properties, solubility in organic solvents and rheological characteristics. Besides, the thermal properties and tensile test of cured polyimide films were also evaluated. The imide oligomer（degree of polymerization： n = 1） has some somewhat crystalline phase, and imide oligomers（degree of polymerization： n = 2？9） showed excellent solubility（40 wt%） in N-methyl-2-pyrrolidone（NMP） and N,Ndimethylacetamide（DMAc） at room temperature. Furthermore, the rheological properties of imide oligomers showed very low melt viscosity and wider processing window. The cured films exhibited good thermal properties with the glass transition temperatures of 282？373 ？C and 5 wt% thermal decomposition temperatures higher than 551 ？C in nitrogen atmosphere. The elongation at break of the prepared films was found to be high（almost 〉 9.3%）.

关键词： Polyimide Imide oligomer Processability Film

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红花椒风味品质的影响因素研究

中国调味品 2024年第1期49卷 48-52,66页

作者：梁琪祝磊张婷王静雯钟慈平吴纯洁成都中医药大学成都611137 乐山职业技术学院四川乐山614000 四川省食品检验研究院成都611731

目的:考察温度、光照、氧气3个因素对红花椒风味物质的综合影响。方法:采用HPLC测定不同影响因素下花椒中羟基-α-山椒素、羟基-β-山椒素、羟基-γ-山椒素、羟基-ε-山椒素等麻味物质含量;采用GC测定不同影响因素下花椒中芳樟醇、柠檬... 详细信息

目的:考察温度、光照、氧气3个因素对红花椒风味物质的综合影响。方法:采用HPLC测定不同影响因素下花椒中羟基-α-山椒素、羟基-β-山椒素、羟基-γ-山椒素、羟基-ε-山椒素等麻味物质含量;采用GC测定不同影响因素下花椒中芳樟醇、柠檬烯、乙酸芳樟酯等香味物质含量;采用极坐标对不同因素对风味物质的影响进行综合强度分析。结果:4℃和25℃时麻味物质含量高且差异较小,4℃时香味物质含量最高;遮光条件下麻味和香味物质含量保存最佳;隔氧条件下,随着储存时间的延长,麻味和香味物质损失较慢;结合强度分析图得出红花椒受到影响的因素主要包括氧气、温度和光照,其中氧气对其影响最显著。结论:对红花椒风味品质的影响因素按照重要性排序为氧气>温度>光照,隔氧、遮光、4℃是最佳条件。该研究为花椒调味品加工、运输和储存提供了参考依据。

关键词：红花椒影响因素麻味香味

Corrigendum to"Crystal structure of RNA helicase from Saint Louis encephalitis virus and discovery of its inhibitors"[Genes Dis 10(2023)389-392]

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Genes & Diseases 2024年第3期11卷 484-484页

作者： De-ping Wang Fang-Ying Jiang Xian-Yan Zeng Yu-Jie Liu Rong Zhao Mei-Yue Wang jing Luo Chen Chen Yong zhu Ji-Min Cao Key laboratory of Cellular Physiology at Shanxi Medical university Ministry of Educationand the Department of PhysiologyShanxi Medical UniversityTaiyuanShanxi 030001China College of Life Sciences Chongqing Medical UniversityChongqing 400016China Department of Biochemistry and Molecular Biology School of Basic Medical SciencesTianjin Medical UniversityTianjin300070China Department of Rheumatology The Second Hospital of Shanxi Medical UniversityTaiyuanShanxi 030001China

We're very sorry for missing a funding program in funding ***,we would like to add this program:The Natural Science Foundation of Tianjin(china)(No.21JCQNJCO1890)from Tianjin Science and technology in the first *** au... 详细信息

关键词： section. Tianjin funding

Antenna selection for MIMO system based on pattern recognition

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Digital Communications and Networks 2019年第1期5卷 34-39页

作者： ping Yang jing zhu Yue Xiao Zhi Chen National Key laboratory of Science and technology on Communications University of Electronic Science and Technology of China Chengdu 611731 China

This paper proposes a novel Multiple-Input Multiple-Output (MIMO) transmission scheme based on Pattern Recognition (PR), which is termed as the PR aided Transmission Antenna Selection MIMO (PR-TAS aided MIMO). As the conventional TAS algorithms need to search all possible legitimate antenna subsets, they may impose some redundant calculations. In order to avoid this problem, we employ some pattern recognition methods to carry out the TAS algorithm in this paper. To be specific, two PR algorithms, namely the K-Nearest Neighbor (KNN) algorithm and the Support Vector Machine (SVM) algorithm, are introduced and redesigned to obtain a TAS with lower complexity but higher efficiency. Moreover, in order to improve the performance of the SVM, we propose a new feature extraction of channel matrix for the TAS. Our simulation results show that the proposed KNN and SVM based PR-TAS algorithms are capable of striking a flexible tradeoff between the complexity and the Bit Error Rate (BER), and the new feature can effectively improve the BER performance compared with the conventional feature extraction method.

关键词： Antenna selection K-nearest neighbors Multiple-input multiple-output Pattern recognition Support vector machine