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马来酸噻吗洛尔中有关物质的识别和测定

药物分析杂志 2024年第3期44卷 450-461页

作者：田珩吴纯敏严全鸿广东省药品检验所国家药品监督管理局药用辅料质量控制与评价重点实验室广州510525

目的:采用超高效液相色谱-四极杆/静电场轨道阱质谱(UPLC-q/Orbitrap HRmS)鉴定马来酸噻吗洛尔中的有关物质。方法:采用ACE Excel3 C18-AR(150 mm×4.6 mm,3μm)色谱柱,以含0.01 mol·L^(-1)乙酸铵的0.2%甲酸水-甲醇为流动相梯度洗脱,流... 详细信息

目的:采用超高效液相色谱-四极杆/静电场轨道阱质谱(UPLC-q/Orbitrap HRmS)鉴定马来酸噻吗洛尔中的有关物质。方法:采用ACE Excel3 C18-AR(150 mm×4.6 mm,3μm)色谱柱,以含0.01 mol·L^(-1)乙酸铵的0.2%甲酸水-甲醇为流动相梯度洗脱,流速0.6 mL·min^(-1),紫外检测器检测波长295 nm,质谱检测器采用HESI离子源,正负离子检测模式,碎片和裂解分析借助mass Frontier 8.0和Compound Discover 3.3软件,通过对主成分进行破坏可以获得系统适用性溶液对样品中的杂质采用UPLC-q/Orbitrap进行鉴定和分析。结果:主成分在特定条件下可产生出噻吗洛尔杂质B{(±)-1-(叔丁氨基)-2-[(4-吗啉基-1,2,5-噻二唑-3-基)氧]-1-丙醇}、噻吗洛尔杂质D(4-吗啉基-1,2,5-噻二唑)、噻吗洛尔杂质E((S,Z)-4{(-)-1-(叔丁氨基)-2[(4-吗啉基-1,2,5-噻二唑-3-基)氧]-4-氧代丁烯二酸})和噻吗洛尔杂质C{(±)-N-(叔丁氨基)-2,3-二[(4-吗啉基-1,2,5-噻二唑-3-基)氧]-2-丙烷胺},噻吗洛尔峰和各杂质峰分离良好,采用紫外检测器测定,定量限为0.05μg·mL^(-1),检测限为0.015μg·mL^(-1)。结合UPLC-q/Orbitrap HRmS结果和文献报道,推测了另外6个主要杂质的结构。4家企业生产的8批样品测定结果单个杂质含量在0.0004%~0.09%,总杂质含量在0.02%~0.12%。结论:通过主成分破坏可获得系统适用性溶液,并用于马来酸噻吗洛尔中杂质的检测与鉴定,结果可为马来酸噻吗洛尔的质量控制提供参考依据。

关键词：马来酸噻吗洛尔 β-受体阻断剂有关物质杂质鉴定超高效液相色谱-四极杆/静电场轨道阱质谱

营造“包容性空间”:国际化社区的治理策略研究

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河海大学学报（哲学社会科学版） 2024年第3期26卷 97-108页

作者：武艳华张志华河海大学公共管理学院江苏南京211100

营造包容性空间,构建包容性社会,加快推进空间治理的现代化进程,是现代化治理的重要目标。基于江苏省南京市q社区的空间营造案例,从社区空间营造策略的视角出发,剖析国际化社区如何营造包容性空间。研究发现,基层政府基于中国居民与外... 详细信息

营造包容性空间,构建包容性社会,加快推进空间治理的现代化进程,是现代化治理的重要目标。基于江苏省南京市q社区的空间营造案例,从社区空间营造策略的视角出发,剖析国际化社区如何营造包容性空间。研究发现,基层政府基于中国居民与外籍人士的空间服务需求,运用多元参与、互动协商、文化治理等软性手段,通过建设人与居住地、社会、自然相融合的表征的包容性空间,组织温度、服务与文化协同相融的包容性空间的实践,构筑开放、包容与共享的包容性空间的表征等方式营造包容性空间。在营造包容性空间的过程中,基层政府空间营造行动的关键策略是采用“分型管理、内育外引”的主体包容策略、“内外兼修、空间包容”的技术包容策略、“多元网格、协商自治”的制度包容策略及“制度共融、成果共享”的结果包容策略,其根本目标在于打造国际化社区的治理共同体。包容性空间的治理技术对优化基层政府的空间治理能力、提升居民的参与水平与再造国际化社区秩序有积极效应,但亦潜藏多主体协同失序、政社关系掣肘、族群关系区隔、文化不稳定及包容性制度偏差等失灵风险。因此,基层政府需厚植多主体合作的治理机制、经营包容性空间的“适度性”,以利于国际化社区善治目标的实现。

关键词：国际化社区包容性空间包容策略治理效能失灵风险

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Investigation of Optimal Split Ratio of 6-Slot/2-pole High Speed Permanent magnet motor with Toroidal Winding

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CES Transactions on Electrical machines and Systems 2022年第4期6卷 343-351页

作者： F.Xu T.R.He Z.q.Zhu H.Bin D.wu L.m.Gong J.T.Chen the University of Sheffield Department of Electronic and Electrical EngineeringMappin StreetSheffieldS13JDUK IEEE motors and Drives Center Midea Group Corporate Research CenterShanghai200131China

Split ratio,*** ratio of stator inner diameter to outer diameter,has a closed relationship with electromagnetic performance of permanent magnet(Pm)*** this paper,the toroidal windings with short end-winding axial length are employed in the 6-slot/2-pole(6s/2p)Pm motor for high speed *** split ratio is optimized together with the ratio of inner slot to outer slot area,*** ratio,considering stator total loss(stator iron loss and copper loss).In addition,the influence of maximum stator iron flux density and tooth-tip on the optimal split ratio,slot ratio,and average torque is *** analytical predictions show that when the slot ratio is 0.5,the maximum torque can be achieved,and the optimal split ratio increases with the decrease of slot ratio,as confirmed by the finite element(FE)***,some of predicted results are verified by the measured results of 6s/2p prototype motor with 0.5 slot ratio.

关键词： High speed Optimal split ratio Permanent magnet motor Slot ratio Toroidal winding

First-Principles Study of the Influence of Lattice misfit on the Behavior and the Ductility Effect of Hafnium in Ni-Ni3AI System

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Acta metallurgica Sinica(English Letters) 2014年第1期27卷 87-94页

作者： Y. wu J. Guo W. Zhang X. ma q. Zhang J. Hou R. Huang X. Liu Institute of molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan 243002 China Shenyang National Laboratory for materials Science Instituteof Metal Research Chinese Academy of SciencesShenyang 110016 China College of Physics Science and Technology Shenyang NormalUniversity Huanghe Street 253 Shengyang 110034 China School of materials Science and Engineering Anhui Universityof Technology Ma'anshan 243002 China

Two Ni/Ni3Al-interface-contained cluster models with/without lattice misfit are studied by first-principles method to clarify the debates about the segregation behaviors of Hafnium （Hf） and explore the influence of lattice misfit on the ductility effect of Hr. It is found that though Hf prefers to substitute A1 rather than Ni in Ni3A1 phase within most of the investigated misfit range, its stronger preferring to Ni phase than NiaA1 phase makes it impossible to go into Ni3A1 phase to occupy A1 site in Ni-Ni3A1 alloys. Bond order analysis in Hf-free case shows that lattice misfit has different effects on the Griffith work of interfacial cleavage 27int/E and the maximum theoretical shear stress Zmax of Ni and Ni3A1, contributing to the existence of anomalous strength-temperature phenomena in NiaA1 alloys. However, the addition of Hf will make the 27int/E （or Zmax） of both Ni3A1 and Ni decrease （or increase） with lattice misfit, indicating that the addition of Hf may make the anomalous strength-temperature relationship in Ni3A1 region disappear locally.

关键词： Hafnium Lattice misfit Segregation Ductility

Improving high-temperature mechanical properties of cast CrFeCoNi high-entropy alloy by highly thermostable in-situ precipitated carbides

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Journal of materials Science & Technology 2021年第13期72卷 29-38页

作者： X.W.Liu N.Gao J.Zheng Y.wu Y.Y.Zhao q.Chen W.Zhou S.Z.Pu W.m.Jiang Z.T.Fan State Key Laboratory of materials Processing and Die&mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China State Key Laboratory for Advanced metals and materials University of Science and Technology BeijingBeijing 100083China School of materials Engineering Purdue UniversityWest LafayetteIN 47907USA Southwest Technology and Engineering Research Institute Chongqing 400039China Center for Electron microscopy Wuhan UniversityWuhan 430072China

The Cr Fe Co Ni high-entropy alloy(HEA)exhibits excellent mechanical properties at lower temperatures due to its low stacking-fault energy,however,its medium-and high-temperature strengths are still *** consideration of the potential diversified applications,more strengthening approaches except for the previously proposed L12 phase hardening deserve further exploration due to its rapid coarsening tendency at high ***,we achieved significant high-temperature strengthening of the cast Cr Fe Co Ni HEA by in-situ precipitation of highly thermostable *** with 0.5 at.%and 1 at.%niobium and carbon were prepared by simple casting processes,*** cast,solute solution and aging.A highly thermostable microstructure was formed,which comprises very coarse grains accompanied with extensive thermostable carbide precipitates embedded,including submicrometer coherent Nb C particles in grain interiors and intergranular coherent m_(23)C_(6)*** high thermostability of microstructure,which is beneficial for the high-temperature loading,is ascribed to the synergy of lacking growth driving force and Zenner pinning effect by the *** properties tested at 673,873 and1073 K show that the yield strength and ultimate tensile strength are significantly increased by Nb/C doping,along with the elongation escalation at higher *** strengthening is mainly due to the precipitation hardening of carbide particles.

关键词： High-entropy alloy Carbides Precipitation High-temperature property Strengthening

STUDY ON REACTION OF (μ_3-CCO_2Et)CO_2m(CO)_8(Cpme)(m=mo,W) WITH Na_2[Fe(CO)_4].SYNTHESIS OF TWO KINDS OF THE NOVEL CLUSTERS EtO_2CCFeCom(CO)_8(Cpme)H AND (OCC)FeCom(CO)_8(Cpme)

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Chinese Chemical Letters 1996年第4期7卷 381-384页

作者： wu H.P. Ding E.R. Yin Y.q. Huano X.Y. Yu K.B. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 Fuzhou Inst. on Structure of matter Stn. Key Lab. of Structure Chemistry Fuzhou 350002 Chengdu Ctr. of Anal. and msrmt. Chinese Academy of Sciences Chengdu 610041

The reactions of dusters (μ3- CCO2Et)Co2m (CO)8(meCp)[m = mo(2a),W(2b)], derived from the reaction of (μ3-CCO2Et)Co3(CO)9 with Na[m(CO)3(meCp)], with Na2[Fe(CO)4] in THF at reflux not only gave the expected metal fragment exchange products (μ3-CCO2Et) FeCom (CO)6(me-Cp )H [m=mo(3a), W(3b)] but also produced the unexpected compounds (μ3-CCO)FeCom (CO)5(meCp) [m=mO(4a), W(4b)]. It is suggested that the formation of two kinds of compounds resulted from two competitive reactions of the intermediates [(μ3-CCO2Et) FeCo m(CO)8,(meCp)] with 11+: the one is the Protonic reaction of the intermediate giving the cluster 3a,b; the another one is the intermolecular nucleophilic substitution reaction of the intermediate under the H+ catalytic action giving the cluster 4a,b.

关键词： CARBONYL CLUSTERS

Selective electrochemical production of hydrogen peroxide at zigzag edges of exfoliated molybdenum telluride nanoflakes

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National Science Review 2020年第8期7卷 1360-1366页

作者： Xuan Zhao Yu Wang Yunli Da Xinxia Wang Tingting Wang mingquan Xu Xiaoyun He wu Zhou Yafei Li jonathan N.Coleman Yanguang Li Institute of Functional Nano and Soft materials (FUNSOm) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University College of Chemistry and materials Science Nanjing Normal University College of material Science and Opto-Electronic Technology University of Chinese Academy of Sciences School of Physical Sciences and CAS Key Laboratory of Vacuum Sciences University of Chinese Academy of Sciences School of Physics CRANN and AMBER Centers Trinity College Dublin

The two-electron reduction of molecular oxygen represents an effective strategy to enable the green, mild and on-demand synthesis of hydrogen peroxide. Its practical viability, however, hinges on the development of advanced electrocatalysts, preferably composed of non-precious elements, to selectively expedite this reaction, particularly in acidic medium. Our study here introduces 2H-moTe;for the first time as the efficient non-precious-metal-based electrocatalyst for the electrochemical production of hydrogen peroxide in acids. We show that exfoliated 2H-moTe;nanoflakes have high activity(onset overpotential ～140 mV and large mass activity of 27 A g;at 0.4 V versus reversible hydrogen electrode), great selectivity（H;O;percentage up to 93%） and decent stability in 0.5 m H;SO;. Theoretical simulations evidence that the high activity and selectivity of 2H-moTe;arise from the proper binding energies of HOO;and O;at its zigzag edges that jointly favor the two-electron reduction instead of the four-electron reduction of molecular oxygen.

关键词： hydrogen peroxide production non-precious-metal-based electrocatalyst molybdenum telluride liquid phase exfoliation zigzag edges

High cycle fatigue behavior of the forged mg-7Gd-5Y-1Nd-0.5Zr alloy

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Journal of magnesium and Alloys 2014年第4期2卷 357-362页

作者： D.wu S.q.Li m.Hong R.S.Chen E.H.Han W.Ke The Group of magnesium Alloys and Their Applications Institute of Metal ResearchChinese Academy of Sciences62 Wencui RoadShenyang 110016China Shenyang Aerospace University Shenyang 110036China

This paper investigated the high cycle fatigue behavior of a forged mg-7Gd-5Y-1Nd-0.5Zr alloy with different stress concentration factor(Kt),under different stress ratio(R),and along different loading *** smooth specimen(Kt=1),under R=0.1 and along longitude direction,shows a high fatigue strength of 162 mPa at 107 *** fatigue behavior of the forged mg-7Gd-5Y-1Nd-0.5Zr alloy exhibits a high sensitive to the ***,change of stress ratio from 0.1 to−1 may also result in a bad fatigue *** flux inclusions were elongated along longitude direction and/or transverse direction during the forging process of the mg-7Gd-5Y-1Nd-0.5Zr *** interface between the flux inclusion and the matrix may debond and serve as the crack initiation site during the fatigue loading process,leading to the deterioration of the fatigue property along thickness direction and a high anisotropic fatigue behavior between longitude direction and thickness direction.

关键词： magnesium alloy Forge High cycle fatigue Stress ratio Inclusion

Novel ternary Ag/CeVO_4/g-C_3N_4 nanocomposite as a highly efficient visible-light-driven photocatalyst

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Journal of Advanced Ceramics 2018年第1期7卷 50-57页

作者： J.REN Y.Z.wu J.m.PAN X.H.YAN m.CHEN J.J.WANG D.F.WANG C.ZHOU q.WANG X.N.CHENG School of materials Science and Engineering Jiangsu University Institute for Advanced materials Jiangsu University Institute of Green materials and metallurgy Jiangsu University

The CeVO_4/graphitic C_3N_4 composites have exhibited much enhanced photocatalytic property for degrading methylene blue(mB) pollutant under visible light irradiation compared with single-phase g-C_3N_4 or CeVO_4. The composite S5 obtained from an optimized mass ratio(5%) of CeVO_4 to dicyanamide(DCDA) exhibits the highest photocatalytic activity. Here, ternary Ag/CeVO_4/g-C_3N_4 composites denoted as X%Ag/S5 were prepared by an ultrasonic precipitation method to improve the photocatalytic property of S5. The TEm images show that CeVO_4 and Ag nanoparticles are well distributed on the layered g-C_3N_4, which agree well with the XRD results. The UV spectra show that the 7%Ag/S5 sample has the widest absorption range and the enhanced absorption intensity under visible light irradiation. The corresponding band gap of 7%Ag/S5(2.5 eV) is much lower than that of S5(2.65 eV). The corresponding k value of 7%Ag/S5 is much higher than those of g-C_3N_4 and CeVO_4. The degradation experiments for mB solution suggest that the 7%Ag/S5 sample has the optimal photocatalytic performance, which can degrade mB solution completely within 120 min. The enhanced photocatalytic property of the composites is ascribed to not only the effect of heterojunction structure, but also the surface plasma resonance effect of Ag nanoparticles.

关键词： g-C3N4 CeVO4 Ag nanocomposites photocatalytic performance