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Zn^(2+)-光预聚丙烯酸酯弹性体的配位机理及其力学性能研究

第十一届全国寄生虫学青年工作者学术研讨会

作者： Xi Zhang Ya Li Shi Zhong Quan Wang jiang yang duan Peng jiang Ruo Dan Liu Jing Cui Department of Parasitology School of Basic Medical SciencesZhengzhou University

Objective:Thelazia callipaeda,also called the oriental eyeworm,is the major etiological agent of human *** of thelaziasis have increased in recent years in *** this species is of medical importance,the genetics and phylogenetic systematics of *** are poorly ***:In this study,we first reported three cases of thelaziasis in central *** clinical isolates were identified as *** according to morphological characteristics by light microscopy and scanning electron ***,complete mitochondrial(mt) genomes for the three *** isolates from different geographical locations were fully characterized using an Illumina sequencing *** addition,all available mt genomes of spirurid nematodes in Gen Bank were included to reconstruct the phylogeny and to explore the evolutionary histories of the ***:The genome features of the *** isolates contained 12 PCGs,22 transfer RNA genes,two ribosomal RNA genes and a major non-coding *** mt DNA nucleotide sequences of the *** isolates from different hosts and different locations were *** nad6 gene showed high sequence variability among all isolates,which is worth considering for future population genetic studies of *** analyses based on maximum parsimony(MP) and Bayesian inference(BI) methods revealed close relationships among Thelaziidae,Onchocercidae,Setariidae,Gongylonematidae,Physalopteridae,Dracunculidae and *** monophyly of the *** isolates from different hosts and distinct geographical locations was ***:The entire mt genomes of *** presented in this study will serve as a useful dataset for studying the population genetics and phylogenetic relationships of Thelazia species.

关键词： Thelazia callipaeda thelaziasis mitochondrial genome next generation sequencing phylogeny

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高分子通报 2024年第11期37卷 1608-1619页

作者：蔡永祺梅启林姜端洋徐建蓉高琳沁丁国民武汉理工大学材料科学与工程学院武汉430070

为了同时提高聚丙烯酸酯弹性体的强度和变形能力,通过光预聚工艺制备了不同黏度的液态丙烯酸酯树脂,使用过氧化苯甲酰(benzoyl peroxide,BPO)和N,N-二甲基苯胺(N,N-dimethylaniline,DMA)作为固化体系并提供配位原子与锌离子(Zn^(2+))产... 详细信息

为了同时提高聚丙烯酸酯弹性体的强度和变形能力,通过光预聚工艺制备了不同黏度的液态丙烯酸酯树脂,使用过氧化苯甲酰(benzoyl peroxide,BPO)和N,N-二甲基苯胺(N,N-dimethylaniline,DMA)作为固化体系并提供配位原子与锌离子(Zn^(2+))产生金属配位键,增加分子链间的相互作用以提高聚合物的力学性能。研究发现在固化过程中树脂由淡黄色变为紫色,固化完全后最终变为绿色。深入探究了此体系颜色变化的原因,进而揭示Zn^(2+)与聚合物分子链的配合机理:Zn^(2+)同时与DMA中的N原子和BPO中的O原子产生配位键,当N、O上带有自由基时体系表现出紫色,无自由基时则表现为绿色。基于以上配位机理,Zn^(2+)与分子链产生的配位键位于链端,极大地提高了弹性体的断裂伸长率,使制备的金属配位丙烯酸酯弹性体的断裂伸长率可从基体的630%提升至7400%。基于金属配位键的弱键特点,研究发现适当的热处理可调节配位键的数量,经过150℃加热处理后,相比于无配位体系,Zn^(2+)配位丙烯酸酯弹性体的拉伸强度提高了28.6%,并且断裂伸长率提高了39.3%,即可同时提升弹性体的强度和变形能力。该研究为金属配位丙烯酸酯弹性体、高延伸丙烯酸酯弹性体的制备提供新思路,制备的弹性体可作为密封件、柔性传感器基体等在对材料的延展率有高要求的应用场景下使用。

关键词：光预聚丙烯酸酯弹性体金属配位机理大变形能力

Wearable and washable textile-based strain sensors via a single-step, environment-friendly method

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Science China(Technological Sciences) 2021年第2期64卷 441-450页

作者： SUN Teng jiang YaDong duan ZaiHua YUAN Zhen WANG yang TAI HuiLing State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054China

Recently, soft and stretchable strain sensors that can be incorporated into textiles have attracted significantly increasing interest for use in a diverse range of applications. However, the simple fabrication of stretchable devices that exhibit excellent sensing performance, are highly durability and are a good fit to the human body remains a challenge. Herein, we describe the fabrication of a new flexible strain sensor on a traditional polyester fabric using a one-step method that involves the reduction of graphene oxide(GO) using ascorbic acid(L-AA). The resulting textile-based strain sensors could be washed, exhibited long-term stability,and had a negative linear response that gave a good sensing response when used in wearable applications. In addition to effectively detecting human motions, the textile was modified such that it could detect ultra-large deformations. The impressive mechanical performance, durability and the ability to capture and monitor a variety of human actions and motions mean that these textile-based sensors have great potential in biomonitoring, soft co-robotics, and human-machine interactions.

关键词： e-textile strain sensor washable motion detection ultra-large strain wearable electronics

Multiple Input Multiple Output CDSK Chaotic Communication System and Its Performance Analysis

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Wuhan University Journal of Natural Sciences 2016年第3期21卷 221-228页

作者： duan Junyi jiang Guoping yang Hua School of Communication and Signal Nanjing Institute of Railway Technology School of Communication and Information Engineering Nanjing University of Posts and Telecommunications

This paper propose a novel noncoherent chaotic com- munication scheme named multiple-input multiple-output correlation-delay-shill- keying （MIMO-CDSK）. In this scheme, multiple antennas are employed to strengthen the robustness in transmission, and to get more diversity gain. The bit error rate （BER） of the MIMO-CDSK is studied analytically in AWGN channel model and multipath fading channel model. The theory and simulation results show that, the performance gain can be obtained with multiple antennas allocated in the transmitter and receiver. Moreover, it is observed that MIMO-CDSK system can effectively reduce the multipath interference.

关键词： multiple input multiple output correlation delayshift keying (CDSK) AWGN (additive white Gaussian noise)channel model multipath fading channel model diversity gain

Robust and Smart Hydrogels Based on Natural Polymers

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Chinese Journal of Polymer Science 2017年第10期35卷 1165-1165,1166-1180页

作者： jiang-jiang duan 张俐娜 College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China

This review summarizes recent progress of the robust and smart hydrogels prepared from natural polymers including polysaccharides, proteins, etc. These hydrogels exhibit outstanding mechanical properties due to their nanofibrous aggregated microstructures and special crosslinking networks. Furthermore, these hydrogels show some smart stimuliresponsive behaviors triggered by p H, temperature, light, electricity and magnetism. Hopefully, these hydrogels derived from natural polymers with inherent biodegradation and biocompatibility have great application potential in the fields of biomedicine, tissue engineering, soft robots and bio-machine.

关键词： Robust and smart hydrogels Natural polysaccharides Nanofiber Biomedical applications

Phosphorylated S6K1 and 4E-BP1 play different roles in constitutively active Rheb-mediated retinal ganglion cell survival and axon regeneration after optic nerve injury

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Neural Regeneration Research 2023年第11期18卷 2526-2534页

作者： Jikuan jiang Lusi Zhang Jingling Zou Jingyuan Liu Jia yang Qian jiang Peiyun duan Bing jiang Department of Ophthalmology Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Hunan Clinical Research Center of Ophthalmic Disease ChangshaHunan ProvinceChina

Ras homolog enriched in brain(Rheb) is a small GTPase that activates mammalian target of rapamycin complex 1(mTORC1).Previous studies have shown that constitutively active Rheb can enhance the regeneration of sensory axons after spinal cord injury by activating downstream effectors of mTOR.S6K1 and4E-BP1 are important downstream effectors of *** this study,we investigated the role of Rheb/mTOR and its downstream effectors S6K1 and 4E-BP1in the protection of retinal ganglion *** transfected an optic nerve crush mouse model with adeno-associated viral 2-mediated constitutively active Rheb and observed the effects on retinal ganglion cell survival and axon *** found that overexpression of constitutively active Rheb promoted survival of retinal ganglion cells in the acute(14 days) and chronic(21 and 42 days) stages of *** also found that either co-expression of the dominant-negative S6K1mutant or the constitutively active 4E-BP1 mutant together with constitutively active Rheb markedly inhibited axon regeneration of retinal ganglion *** suggests that mTORC1-mediated S6K1 activation and 4E-BP1 inhibition were necessary components for constitutively active Rheb-induced axon ***,only S6K1 activation,but not 4E-BP1 knockdown,induced axon regeneration when applied ***,S6K1 activation promoted the survival of retinal ganglion cells at 14 days post-injury,whereas 4E-BP1 knockdown unexpectedly slightly decreased the survival of retinal ganglion cells at 14 days *** rexpression of constitutively active 4E-BP1 increased the survival of retinal ganglion cells at 14 days ***,co-expressing constitutively active Rheb and constitutively active 4E-BP1 markedly increased the survival of retinal ganglion cells compared with overexpression of constitutively active Rheb alone at 14 days *** findings indicate that functional 4E-BP1 and S6K1 are neuroprotective and that 4E-BP1 may exer

关键词： axon regeneration central nervous system gene therapy mRNA translation neurodegeneration neuroprotection optic nerve crush Ras homolog enriched in the brain retina translation initiation

Ti_(4)O_(7) supported IrO_(x) for anode reversal tolerance in proton exchange membrane fuel cell

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Frontiers in Energy 2022年第5期16卷 852-861页

作者： Yonghuan LI Wei SONG Guang jiang Yue yang Hongmei YU Zhigang SHAO Fangwei duan Yingxuan yang Fuel Cell System and Engineering Laboratory Key Laboratory of Fuel Cells and Hybrid Power SourcesDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of the Chinese Academy of Sciences Beijing 100039China State Grid Liaoning Electric Power Research Institute Shenyang 110055China

Fuel starvation can occur and cause damage to the cell when proton exchange membrane fuel cells operate under complex working *** this case,carbon corrosion *** evolution reaction(OER)catalysts can alleviate carbon corrosion by introducing water electrolysis at a lower potential at the anode in fuel *** mixture of hydrogen oxidation reaction(HOR)and unsupported OER catalyst not only reduces the electrolysis efficiency,but also influences the initial performance of the fuel ***,Ti_(4)O_(7) supported IrO_(x) is synthesized by utilizing the surfactant-assistant method and serves as reversal tolerant components in the *** the cell reverse time is less than 100 min,the cell voltage of the MEA added with IrO_(x)/Ti_(4)O_(7) has almost no ***,the MEA has a longer reversal time(530 min)than IrO_(x)(75 min),showing an excellent reversal *** results of electron microscopy spectroscopy show that IrO_(x) particles have a good dispersity on the surface of Ti_(4)O_(7) and IrO_(x)/Ti_(4)O_(7) particles are uniformly dispersed on the anode catalytic *** the stability test,the Ti_(4)O_(7) support has little decay,demonstrating a high electrochemical ***_(x)/Ti_(4)O_(7) with a high dispersity has a great potential to the application on the reversal tolerance anode of the fuel cell.

关键词： proton exchange membrane fuel cell(PEMFC) fuel starvation cell reverse reversal tolerance anode oxygen evolution reaction

Topological Quantization of k-Dimensional Topological Defects and Motion Equations

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Chinese Physics Letters 2001年第5期18卷 631-633页

作者： yang Guo-Hong jiang Ying duan Yi-Shi Department of Physics Shanghai UniversityShanghai 200436 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080 Institute of Theoretical Physics Lanzhou UniversityLanzhou 730000

UsingФ-mapping method and kth-order topological tensor current theory,we present a unified theory of describing k-dimensional topological defects and obtain their topological quantization and motion *** is shown that the inner structure of the topological tensor current is just the dynamic form of the topological defects,which are generated from the zeros of the m-component order parameter vector *** this dynamic form,the topological defects are topologically quantized naturally and the topological quantum numbers are determined by the Hopf indices and the Brouwer *** the generalization of Nielsen's Lagrangian and Nambu's action for strings,the action and the motion equations of the topological defects are also derived.

关键词： field topological tensor

Topological Quantization of Linear Defects

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Chinese Physics Letters 1998年第11期15卷 781-783页

作者： duan Yi-shi jiang Ying yang Guo-hong Institute of Theoretical Physics Lanzhou UniversityLanzhou 730000 Department of Physics Fudan UniversityShanghai 200433

Using Ф-mapping method and topological current theory,we get the topological structure and the topological quantization of topological linear defects and point out that the topological quantum numbers of the linear defects are described by the Winding numbers of Ф-mapping which are determined in terms of the Hopf indices and the Brouwer *** the topological linear defects are generated from the zero points of the Ф-mapping.

关键词： topological Defects indices