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A Glycosylated and Catechol-crosslinkedε-Polylysine Hydrogel:Simple Preparation and Excellent Wound hemostasis and healing Properties

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Chinese Journal of Polymer Science 2022年第9期40卷 1110-1119页

作者： Lin Teng Zheng-Wei Shao yu-shi he Jia-yu Lu De-Rong Zou Chuan-Liang Feng Chang-Ming Dong School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Department of Stomatology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai Jiao Tong UniversityShanghai 200233China School of Chemistry and Chemical Engineering Shanghai Electrochemical Energy Devices Research CenterShanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China

Commercial tissue adhesives have been widely applied in wound hemostats and dressings while enhancing the hemostasis and healing capabilities is challenging to meet clinical ***,we designed the glucose-and catechol-functionalized derivatives from commercialε-polylysine(EPL)and prepared the hydrogels by simple amidation and catechol-crosslinking reactions,which have larger swelling ratios of 220%–240%,suitable microporous size of about 6–8µm,and tissue adhesion strength of about 20–40 *** hemolysis,cytotoxicity,and cellular double-staining assays indicate that those hydrogels had good biocompatibility and the H-3 hydrogel with higher glucose content gave a lower hemolysis ratio of 0.73%±0.14%.The blood-clotting index,blood cell attachment and adhesion studies showed those hydrogels had fast blood-coagulation,resulting in excellent hemostasis performance with a short hemostatic time of 38–46 s and less blood loss of 19%–34%in a liver hemorrhage model.A full-thickness rat-skin defect model further demonstrates that the H-3 hydrogel achieved fast wound healing with a wound closure of 70.0%±2.7%on postoperative day 7 and nearly full closure on day ***,the hydroproline level that denotes the collagen production reached a higher one of 7.24±0.55µg/mg comparable to that in normal skins on day 14,evidencing the wound healing was close to completion in the H-3 ***,this work provides a simple method to construct a glycosylated and catechol-functionalized hydrogel platform from commercial EPL,holding translational potentials in wound hemostats and dressings.

关键词： Polylysine hydrogel Glycosylation Mussel-mimetic hemostasis Wound dressing

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The Wear Process of PTFE Coatings Under Vacuum Conditions

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Journal of Harbin Institute of Technology(New Series) 2014年第1期21卷 121-124页

作者： Xing-Dong yuan Yong Liu De-Zhuang Yang shi-yu he School of Materials Science and Engineering Shandong Jianzhu University Space Material and Environment Engineering Lab. Harbin Institute of Technology

The wear process of PTFE coatings sliding against GCr15-bearing steel ball under vacuum conditions was investigated,and the hardness of the PTFE coatings on both sides of wear track was measured. The experimental results showed that the friction coefficient of the PTFE coatings increases with the increase of sliding distance under different sliding velocities. And the friction coefficient of the PTFE coatings increases with the increase of sliding distance under different sliding loads. The wear rate of PTFE coatings decreases with the increase of sliding distance. And the majority of the wear produced during the whole wear process of PTFE coatings sliding against GCr-15 steel ball comes from the early period of friction. The hardness of PTFE coatings on both sides of wear track increases as the distance increases and distributes symmetrically around the wear track. Scanning electron microscope( SEM) was utilized to investigate the worn surface of PTFE coating. It was found that the worn surface of PTFE coating is characterized by sever plastic deformation and spalling of the PTFE coating. The edge of wear track is characterized by micro cracking.

关键词： sliding wear two-body abrasion polymers high vacuum

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Constructing a"pea-pod"-like nanostructure to provide valid conductive matrix and volume change accommodation for silicon anode in lithium ion batteries

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Green Chemical Engineering 2021年第3期2卷 327-335页

作者： Jingjing Ma Huan Zhang yuanchao Li Linfeng Hu Qing Wang WanQing Zhang Li Yang Guang-Ri Xu yu-shi he Tianjun Lou Zi-Feng Ma College of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyHenan453003China Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240China

A"pea-pod"-like composite of graphene-wrapped silicon nanoparticles(P–Si@GS)was successfully prepared via a new and facial technique utilizing freeze-drying and subsequent solvothermal *** cross-linked"pods"formed by curled few-layer graphene sheets constituted a conductive network,in which silicon nanoparticles were tightly *** unique graphene-wrapped structure with mesopores on the surface can effectively enhance the conductivity of silicon,alleviate its volume effect and provide rapid transport channels for electrons and ions,thus resulting in excellent electrochemical *** strategy of combining freeze-drying and solvothermal methods is facile,low-cost and effective,which provides new ideas for the preparation of highperformance graphene-wrapped nanoparticles composites.

关键词： Silicon Graphene Anode material Freeze-drying Lithium-ion battery

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The Effects of Solid Phase Additives on Sintering Properties of Alumina Bioceramic

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Journal of Wuhan University of Technology(Materials Science) 2003年第2期18卷 23-24页

作者：王欣宇 Wuhan University of Technology

In order to reduce the sintering temperature and improve the preparing conditions of alumina bioceramics,the Mg-Zr-Y composite solid phase additives were added into high purity Al 2O 3 micro-powder by chemical coprecipitation *** powder was shaped under 200MPa cold isostatic pressure,and then the biscuits were sintered at 1600℃ under normal *** sintered alumina materials were tested and the sintering mechanism was *** results show that physical properties of the material were improved *** Mg-Zr-Y composite solid additives could promote the sintering of alumina bioceramics and the mechanism is solid phase sintering.

关键词： alumina sintering additives property

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Revisiting the capacity-fading mechanism of P2-type sodium layered oxide cathode materials during high-voltage cycling

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Journal of Energy Chemistry 2022年第6期31卷 16-25,I0002页

作者： Meidan Jiang Guannan Qian Xiao-Zhen Liao Zhouhong Ren Qingyu Dong Dechao Meng Guijia Cui Siqi yuan Sang-Jun Lee Tian Qin Xi Liu Yanbin Shen yu-shi he Liwei Chen Yijin Liu Linsen Li Zi-Feng Ma Department of Chemical Engineering Shanghai Electrochemical Energy Device Research Center(SEED)School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Stanford Synchrotron Radiation Lightsource SLAC National Accelerator LaboratoryMenlo ParkCA 94025United States In-Situ Center for Physical Sciences School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Suzhou Institute of Nanotech and Nanobionics(SINANO) Chinese Academy of SciencesSuzhou 215123JiangsuChina Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213SichuanChina

P2-type sodium layered oxide cathode (Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)P2-NNMO) has attracted great attention as a promising cathode material for sodium ion batteries because of its high specific capacity. However, this material suffers from a rapid capacity fade during high-voltage cycling. Several mechanisms have been proposed to explain the capacity fade, including intragranular fracture caused by the P2-O2 phase transion, surface structural change, and irreversible lattice oxygen release. here we systematically investigated the morphological, structural, and chemical changes of P2-NNMO during high-voltage cycling using a variety of characterization techniques. It was found that the lattice distortion and crystal-plane buckling induced by the P2-O2 phase transition slowed down the Na-ion transport in the bulk and hindered the extraction of the Na ions. The sluggish kinetics was the main reason in reducing the accessible capacity while other interfacial degradation mechanisms played minor roles. Our results not only enabled a more complete understanding of the capacity-fading mechanism of P2-NNMO but also revealed the underlying correlations between lattice doping and the moderately improved cycle performance.

关键词： Phase transition Layered cathode Buckling Capacity fading mechanism Sodium-ion batteries

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Direct oxygen removal from titanium aluminide scraps by yttrium reduction

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2428-2437页

作者： Li-na JIAO Qi-sheng FENG shi-yu he Bao-hua DUAN Zhi-he DOU Chong-he LI Xiong-gang LU State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200072China School of Metallurgy and Materials Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral Ministry of EducationNortheastern UniversityShenyang 110819China Shanghai Special Casting Engineering Technology Research Center Shanghai 201605China School of Materials Science and Engineering Shanghai Dianji UniversityShanghai 201306China

Titanium aluminum(TiAl)scraps with a high oxygen content were treated with yttrium(Y)in a liquid chemical deoxidization process for *** Gibbs free energy and the equilibrium constant of the deoxidization reaction were calculated,and the effects of the yttrium content and the system pressure on the oxygen content in the product were *** results showed that the oxygen in TiAl scraps could be removed by yttrium,and the oxygen content of the deoxidized TiAl scraps had only 10%of the original content after ***,the oxygen content of the deoxidized TiAl scraps was decreased with the increase of yttrium *** higher the chamber pressure,the greater the oxygen content in the final TiAl *** results were consistent with calculated *** microstructure of the deoxidized alloys was akin to that of the original material;however,Y_(2)O_(3) particles were observed in the deoxidized alloys.

关键词： titanium aluminum scrap yttrium deoxidation recycling

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On the Existencc of Asymptotically Decaying Positive Solutions of Second Order Neutral Differential Equations

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零陵学院学报 1992年第3期 1-9页

作者： yu Jians he shi Yongsheng Hunan University Ling ling Teacher’s college

The existence of postive solutions of second order neutral differential equation.(x(t)-cx(t-r)〃+P(t)x(g(t)=0,t≥t(*)is investigated some sufficient conditions are given for the existence of positivesolutions with asymptotic clecay of(*)for the cases of constant sign and noncon-stant sing of *** also is shown that one of these sufficient conditionsis necessasy.

关键词： asymptotic neutral proof oscillation constants stence holds convex 司卜 uniformly

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The function of A-type horizontal cells or B-type horizontal cells in the rabbit retina

The function of A-type horizontal cells or B-type horizontal...

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中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： Rong-yu LIAO,shi-Gang he Institute of Biophysics,Chinese Academy of Sciences

＜正＞Purpose There are two types of horizontal cells in the rabbit retina:A-type horizontal cells（AHCs） and B-type horizontal cells（BHCs）.However,there is only one type horizontal cell in the mouse and rat retina:B-type horizontal cells. So,there’s a doubt that why rabbit has two types of horizontal *** study was aimed to research the visual transduction in the rabbit retina only has AHCs or *** The A-type horizontal cell or B-type horizontal cell was injected with cytochrome C（Cc） on isolated rabbit retina *** the retina was cultured for some time until the apoptosis of targeted cell was induced and the death signals spread to other "bystander" *** assay was used to tested whether all of the apoptosis of the AHCs or BHCs were induced in a piece of rabbit *** The AHCs and BHCs was injected with Cc,but till now there were not apoptosis of AHCs or BHCs in the targeted cells on the *** are working for finding a appropriate condition for inducing apoptosis of the AHCs or BHCs injected with *** the AHCs or BHCs are resistant to Cc-induced cell death,we expect to find out the resistant mechanism of AHCs or BHCs in the rabbit retina.

关键词： A-type horizontal cell B-type horizontal cell rabbit retina

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窄间隙约束下熔化极气体保护焊的电弧形态和熔滴过渡分析

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上海交通大学学报 2016年第10期50卷 1526-1529,1534页

作者：顾玉芬何冠宇石玗何伟朱明兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050 兰州理工大学有色金属合金及加工教育部重点实验室兰州730050

为研究采用平特性焊接电源和窄间隙约束下的电弧行为,建立了窄间隙熔化极气体保护焊(GMAW)试验系统,利用高速摄像系统观察电弧的爬升现象、电弧的形态和熔滴过渡过程,分析了窄间隙约束条件下产生电弧爬升现象的原因,并利用静力平衡理论... 详细信息

为研究采用平特性焊接电源和窄间隙约束下的电弧行为,建立了窄间隙熔化极气体保护焊(GMAW)试验系统,利用高速摄像系统观察电弧的爬升现象、电弧的形态和熔滴过渡过程,分析了窄间隙约束条件下产生电弧爬升现象的原因,并利用静力平衡理论分析不同电弧形态下熔滴过渡中的受力情况.结果表明:窄间隙GMAW焊接过程中的电弧爬升现象是由最小电压原理与电弧自调节共同作用的结果;电弧形态可按不同的导电路径分为3类,并均归结于最小电压原理的作用;窄间隙GMAW的熔滴过渡形式与不同电弧形态下的电磁力的大小和方向有关.

关键词：窄间隙熔化极气体保护焊电弧爬升电弧形态熔滴过渡

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Low‑Temperature Oxidation Induced Phase Evolution with Gradient Magnetic heterointerfaces for Superior Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第1期17卷 191-204页

作者： Zizhuang he Lingzi shi Ran Sun Lianfei Ding Mukun he Jiaming Li Hua Guo Tiande Gao Panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129People’s Republic of China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Gradient magnetic heterointerfaces have injected infinite vitality in optimizing impedance matching,adjusting dielectric/magnetic resonance and promoting electromagnetic(EM)wave absorption,but still exist a significant challenging in regulating local phase ***,accordion-shaped Co/Co_(3)O_(4)@N-doped carbon nanosheets(Co/Co_(3)O_(4)@NC)with gradient magnetic heterointerfaces have been fabricated via the cooperative high-temperature carbonization and lowtemperature oxidation *** results indicate that the surface epitaxial growth of crystal Co_(3)O_(4) domains on local Co nanoparticles realizes the adjustment of magnetic-heteroatomic components,which are beneficial for optimizing impedance matching and interfacial ***,gradient magnetic heterointerfaces simultaneously realize magnetic coupling,and long-range magnetic ***,the synthesized Co/Co_(3)O_(4)@NC absorbents display the strong electromagnetic wave attenuation capability of−53.5 dB at a thickness of 3.0 mm with an effective absorption bandwidth of 5.36 GHz,both are superior to those of single magnetic domains embedded in carbon *** design concept provides us an inspiration in optimizing interfacial polarization,regulating magnetic coupling and promoting electromagnetic wave absorption.

关键词： Magnetic heterointerfaces Phase evolution Interfacial polarization Magnetic coupling Electromagnetic wave absorption

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