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Recent Advances in Helical Polyisocyanide-based Block Copolymers:Preparation,Self-assembly and Circularly Polarized Luminescence

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Chemical Research in Chinese Universities 2023年第5期39卷 719-725页

作者： zhou Li CHEN Kun zhou Xing-Yu wu Zong-quan Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringAnhui Key Laboratory of Advanced Functional Materials and DevicesHefei University of TechnologyHefei 230009P.R.China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012P.R.China

Polyisocyanides and their block copolymers have widespread applications in many fields due to their unique helix and self-assembly *** first,the latest progress in the preparation of helical polyisocyanide-based block copolymers via the method of one-pot sequential controlled synthesis and stepwise polymerization was highlighted in this *** categories of helical polyisocyanide-based copolymers including amphiphilic block copolymers,UV-response block copolymers,π-conjugated block copolymers,etc.,have been prepared ***,recent advances in the self-assembly and circularly polarized luminescence performance of amphiphilic andπ-conjugated helical polyisocyanide-based copolymers have been introduced,*** hope this minireview will not only inspire more interest in developing helical polyisocyanide-based copolymers,but also encourage further progress in the field of building artificial functional materials.

关键词： Helical polyisocyanide Block copolymer Self-assemble Circularly polarized luminescence

Horizontal convection in a rectangular enclosure driven by a linear temperature profile

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Applied Mathematics and Mechanics(English Edition) 2021年第8期42卷 1183-1190页

作者： Tianyong YANG Bofu WANG Jianzhao wu Zhiming LU quan zhou Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China

The horizontal convection in a square enclosure driven by a linear temperature profile along the bottom boundary is investigated numerically by using a finite difference *** Prandtl number is fixed at 4.38,and the Rayleigh number Ra ranges from107 to *** convective flow is steady at a relatively low Rayleigh number,and no thermal plume is observed,whereas it transits to be unsteady when the Rayleigh number increases beyond the critical *** scaling law for the Nusselt number Nu changes from Rossby’s scaling Nu~Ra^(1/5)in a steady regime to Nu~Ra^(1/4)in an unsteady regime,which agrees well with the theoretically predicted ***,the Reynolds number Re scaling varies from Re~Ra^(3/11)to Re~Ra^(2/5).The investigation on the mean flows shows that the thermal and kinetic boundary layer thickness and the mean temperature in the bulk zone decrease with the increasing *** intensity of fluctuating velocity increases with the increasing Ra.

关键词： horizontal convection linear temperature profile turbulent heat transfer boundary layer

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白内障手术医师培训模式初探

国际眼科杂志 2008年第12期8卷 2543-2544页

作者：钟景贤赵亚军吴子东吴周泉李凤轩江门新会新希望眼科医院中国广东省江门市529100 海南眼科医院中国海南省海口市570000 中国广东省江门市恩平新希望眼耳鼻喉医院 529400 中国广东省江门市新希望眼科研究所 529100

目的:探索一条适合在我国开展的行之有效的白内障手术医生培训模式。方法:对尚未掌握白内障手术的本院眼科医生、进修生、实习生以及乡镇医院的五官科医生共106名,针对不同的基础制定计划、有序地进行培训。结果:全部受训人员能正确地... 详细信息

目的:探索一条适合在我国开展的行之有效的白内障手术医生培训模式。方法:对尚未掌握白内障手术的本院眼科医生、进修生、实习生以及乡镇医院的五官科医生共106名,针对不同的基础制定计划、有序地进行培训。结果:全部受训人员能正确地完成白内障辅助检查;掌握白内障术前的筛查方法及人工晶状体正确计算;白内障手术基本操作比较准确和熟练,显微手术操作合格,掌握环形撕囊技术101名;掌握白内障囊外摘除+人工晶状体植入术69名;能独立操作"削梨法"超声乳化白内障+人工晶状体植入术37名,个别医生手术量已超1000台。结论:培训应针对不同的基础制定计划、逐步进行,并将理论与实践相结合,才能更快更好地培训出合格的白内障手术医师。

关键词：白内障手术培训模式

Homer signaling pathways as effective therapeutic targets for ischemic and traumatic brain injuries and retinal lesions

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Neural Regeneration Research 2022年第7期17卷 1454-1461页

作者： Xiu-quan wu Ning Su zhou Fei Fei Fei Department of Neurosurgery Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Radiation Oncology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology Xijing Hospitalthe Fourth Military Medical UniversityXi’anShaanxi ProvinceChina

Ischemic and traumatic insults to the central nervous system account for most serious acute and fatal brain injuries and are usually characterized by primary and secondary *** damage presents the greatest challenge for medical staff;however,there are currently few effective therapeutic targets for secondary *** proteins are postsynaptic scaffolding proteins that have been implicated in ischemic and traumatic insults to the central nervous *** signaling can exert either positive or negative effects during such insults,depending on the specific subtype of Homer *** 1b/c couples with other proteins to form postsynaptic densities,which form the basis of synaptic transmission,while Homer 1a expression can be induced by harmful external *** 1c is used as a unique biomarker to reveal alterations in synaptic connectivity before and during the early stages of apoptosis in retinal ganglion cells,mediated or affected by extracellular or intracellular signaling or cytoskeletal *** review summarizes the structural features,related signaling pathways,and diverse roles of Homer proteins in physiological and pathological *** Homer 1a or downregulating Homer 1b/c may play a neuroprotective role in secondary brain *** also plays an important role in the formation of photoreceptor *** findings confirm the neuroprotective effects of Homer,and support the future design of therapeutic drug targets or gene therapies for ischemic and traumatic brain injuries and retinal disorders based on Homer proteins.

关键词： brain injury calcium signaling cerebral ischemia dendritic spine glutamate receptor Homer scaffolding protein neuron neuroprotection retinal ganglion cell review traumatic brain injury

Effect of microstructure on the impact toughness of a bainitic steel bloom for large plastic molds

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International Journal of Minerals,Metallurgy and Materials 2015年第8期22卷 842-850页

作者： Zheng Zhang Xiao-chun wu quan zhou Li-li Duan School of Materials Science and Engineering Shanghai University

The correlation between the impact toughness and microstructural characteristics of a large bainitic steel bloom has been investigated. The study focuses on microcrack nucleation and propagation in the basic cleavage plane. To analyze the phase transformation during the wind-cooling process, the temperature field of the bloom was acquired by computer simulation, and a continuous cooling transformation experiment was conducted. The results show that compared with the surface of the bloom, the toughness of the bloom’s core is decreased by the increase in proeutectoid ferrite and the coarsening of tempered martensite–austenite constituents. The proeutectoid ferrite decreases the toughness via its effects on carbide precipitation, the formation of martensite–austenite constituents, and the bainite transformation. The relatively large tempered martensite–austenite constituents are conducive to microcrack nucleation and propagation.

关键词： mold steel microstructure impact toughness cooling

The driven cavity turbulent flow with porous walls: Energy transfer, dissipation, and time-space correlations

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Journal of Hydrodynamics 2021年第4期33卷 712-724页

作者： Wen-wu Yang Bo-fu Wang quan zhou Yu-hong Dong Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai200072China

The energy transfer and dissipation as well as the turbulent structures in a lid-driven cavity flow with porous walls are investigated via the lattice Boltzmann method, with direct numerical simulation (DNS) for an isothermal incompressible flow for which the Reynolds number (Re) is 50 000. A generalized Navier-Stokes equation with the Brinkman-Forchheimer-extended Darcy model is implemented, in which the presence of permeable walls is taken into account. This study focuses on the modulations of the flow field due to porous walls, by comparing with the results from the cavity flow bounded with smooth walls. Firstly, we derived the exact expression of the kinetic energy dissipation rate in a cavity to study the budget balance of the induced and dissipated kinetic energy. By decomposing the total kinetic energy dissipation into the componential contributions of the viscous and porous medium layer, we found that the kinetic energy dissipated in the thin porous layer occupies 37% of the total driven lid-induced kinetic energy in the present parameters. Then we found that the time-averaged kinetic energy, turbulent kinetic energy (TKE), as well as the strength of the large-scale energy-containing eddy, and secondary eddies are significantly attenuated. Furthermore, it is found that the momentum and kinetic energy transfer near the corners are vastly decreased. Finally, the space-time velocity correlation functions are also provided to examine the decorrelation property of small eddies by means of convection and distortion motions in the cavity turbulent field.

关键词： Cavity turbulent flow porous medium energy transfer dissipation time-space correlations

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添加蒜泥对广式腊肠品质的影响

食品工业科技 2018年第10期39卷 12-16,21页

作者：黄智郭善广陈明造周佺吴炜亮陈伟玲蒋爱民华南农业大学食品学院广东广州510642 台湾中兴大学动物科学系广东省疾病预防控制中心营养与食品安全研究所广东广州511430 贺州学院食品与生物工程学院广西贺州542800

通过在广式腊肠中分别添加1%、2%、3%的蒜泥,探究不同比例的蒜泥对广式腊肠脂肪和蛋白质氧化、亚硝酸盐残留量以及感官特性的影响,以此确定最佳蒜泥添加量。结果表明:2%蒜泥可以显著提高广式腊肠的a*值(红度值)(p0.05),而3%蒜泥显著提... 详细信息

通过在广式腊肠中分别添加1%、2%、3%的蒜泥,探究不同比例的蒜泥对广式腊肠脂肪和蛋白质氧化、亚硝酸盐残留量以及感官特性的影响,以此确定最佳蒜泥添加量。结果表明:2%蒜泥可以显著提高广式腊肠的a*值(红度值)(p0.05),而3%蒜泥显著提高了腊肠的硬度(p0.05),而在贮藏期间添加2%和3%蒜泥的AV、POV、TVB-N、TBA值以及亚硝酸盐残留量显著低于空白组(p0.05)。2%蒜泥保持了广式腊肠原有的质构和风味特征,提高了红度值,有效延缓广式腊肠脂肪和蛋白质氧化腐败以及降低亚硝酸盐残留量。因此,2%为最佳蒜泥添加量。

关键词：蒜泥广式腊肠品质

CsBaB_(3)O_(6):Eu^(3+) red-emitting phosphors for white LED and FED:Crystal structure,electronic structure and luminescent properties

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Journal of Rare Earths 2021年第9期39卷 1040-1048页

作者： quansheng wu Yujie Xie Fang She quan Zhao Jianyan Ding Jiangcong zhou College of Chemistry&Materials Science Longyan UniversityLongyan 364000China Fujian Provincial Key Laboratory of Clean Energy Materials College of Chemistry and Materials ScienceLongyan UniversityLongyan 364000China

Recently,borate compounds have received much attention in the field of rare earth doped phosphors due to their excellent luminescent *** this work,to explore the potential in LED and FED applications,the CsBaB_(3)O_(6):Eu^(3+)phosphor was investigated in detail by using Rietveld refinement,DFT calculations,photoluminescent and cathodoluminescent *** a result,CsBaB_(3)O_(6)has a planar stacked three-dimensional layered *** the excitation of 395 nm n-UV light and electron beam,CsBaB_(3)O_(6):Eu^(3+)phosphor exhibits a typical red emission of Eu^(3+).A good thermal stability and good resistance to saturation and degradation were observed in the CsBaB_(3)O_(6):Eu^(3+)*** related photoluminescent and cathodoluminescent mechanisms were *** results indicate that CsBaB_(3)O_(6):Eu^(3+)phosphor has potential in multifunctional applications.

关键词： Phosphor Borate Photoluminescence Cathodoluminescence Multifunction Rare earths

Chiral Recognition and Resolution Based on Helical Polymers

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Chinese Journal of Polymer Science 2021年第12期39卷 1521-1527页

作者： Hui Zou Qi-Liang wu Li zhou Xiao-Hua Hou Na Liu Zong-quan wu Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei 230009China

Helical polymers have attracted a great deal of attention and been extensively investigated due to their various *** of the most importa nt applicati ons of helical polymers is chiral recog nition and resolutio n ofe nan tiomersforthe reas on that a pair of e nan tiomers is comm only with differe nt physiological and toxicological behaviors in biological *** polymers usually prese nt un expected high chiral recogniti on ability to a variety of racemic compo *** more,the chiral recog nition and resolution abilities of the system are depe ndent on the highly ordered helical structures of the helical *** mini review mainly focuses on the recent progress in chiral recognition and resolution based on helical *** synthetic methodology for helical polymers is firstly discussed *** recent advances of chiral recog nition and resoluti on systems based on helical polymers,especially polyacetylenes and polyisocya nides,are *** hope this mini review will in spire more in terest in developing helical polymers and en courage further advances in chiral-related disciplines.

关键词： Helical polymer Chiral recog nition Chiral resolution Polyacetylenes Polyisocyanides