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Monolith free-standing plasmonic PAN/Ag/AgX(X = Br, I)nanofiber mat as easily recoverable visible-light-driven photocatalyst

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Rare Metals 2019年第5期38卷 361-368页

作者： Meng-Mo Ping Shu-Jun Qiu Gui-Juan wei Jun-Xue Liu Zhao-jie wang Shu-tao wang Chang-Hua An Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China School of Materials Science and Engineering China University of PetroleumQingdao 266580China

Most efficient visible-light-responsive photocatalysts are in the form of powder,leading to the tedious separation from the reaction ***,we developed a versatile method for the general synthesis of free-standing polyacrylonitrile(PAN)/Ag/AgX(X=Br,I)nanofiber mats,where fibrous PAN/Ag precursor was firstly prepared via an electroless plating strategy,followed by a direct elemental halogenation with Br2/H2O or I2/ethanol *** as-obtained PAN/Ag/AgX nanofiber mats exhibit exceptional photocatalytic activity toward degradation of organic ***,the flexibility enables it to be easily recovered after the reaction was *** work provides new insights into the fabrication of membrane-based photocatalysts on a large scale.

关键词： Free-standing PAN/Ag/AgX(X = Br,Ⅰ) Nanofiber Photocatalysts

Solidification microstructure of high borated stainless steels with rare earth and titanium additions

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Rare Metals 2020年第12期39卷 1483-1491页

作者： Yong-wang Li Hai-tao Liu Zhao-jie wang Zhi-Heng Zhang wei-Ting Li Hui-Ying Shen Xiao-Ming Zhang Guo-Dong wang State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

To study the effects of rare earth(RE)and Ti on the solidification micros true ture of high borated stainless steels,1.6 wt%B stainless steel doped with RE and2.1 wt%B stainless steel doped with Ti were prepared by ingot casting,*** solidification microstructure of researched steels was characterized in *** modification mechanism was clarified based on the heterogeneous nucleation theory and the thermodynamic *** solidification microstructure of 1.6 wt%B and 2.1 wt%B stainless steels was characterized by the continuous and network-like eutectic borides around the matrix *** was found that the fine RE compounds could act as the heterogeneous nuclei for both borides and austenite during ***,the eutectic borides were more dispersed in the modified ***,lots of fine‘eutectic cells’were formed in the matrix *** a result of the preferential formation of TiB2 during solidification,the amount of the eutectic borides in the steel modified with Ti was significantly ***,the continuity of the eutectic borides network was *** a word,the present work provides a promising method to modify the solidification microstructure for high borated stainless steels.

关键词： Borated stainless steels Solidification microstructure Rare earth Titanium

LIMK2 is required for membrane cytoskeleton reorganization of contracting airway smooth muscle

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Journal of Genetics and Genomics 2021年第6期48卷 452-462页

作者： Yeqiong Li Yuwei Zhou Pei wang tao tao Lisha wei Ye wang wei wang Yanyan Zheng Zhihui Jiang Tiantian Qiu wei Zhao jie Sun Xin Chen Xue-Na Zhang Min-Sheng Zhu State Key Laboratory of Pharmaceutical Biotechnology Model Animal Research Center of Medical School and Gulou Hospital affiliated Medical SchoolNanjing UniversityNanjing 210061China

Airway smooth muscle(ASM)has developed a mechanical adaption mechanism by which it transduces force and responds to environmental forces,which is essential for periodic *** reorganization has been implicated in this process,but the regulatory mechanism remains to be *** here observe that ASM abundantly expresses cytoskeleton regulators Limk1 and Limk2,and their expression levels are further upregulated in chronic obstructive pulmonary disease(COPD)*** establishing mouse lines with deletions of Limk1 or Limk2,we analyse the length-sensitive contraction,F/Gactin dynamics,and F-actin pool of mutant ASM *** LIMK1 phosphorylation does not respond to the contractile stimulation,LIMK1-deficient ASM develops normal maximal force,while LIMK2 or LIMK1/LIMK2 deficient ASMs show approximately 30%***2 deletion causes a significant decrease in cofilin phosphorylation along with a reduced F/G-actin *** LIMK2 functions independently of cross-bridge movement,this observation indicates that LIMK2 is necessary for F-actin dynamics and hence force ***,LIMK2-deficient ASMs display abolishes stretching-induced suppression of 5-hydroxytryptamine(5-HT)but not acetylcholine-evoks force,which is due to the differential contraction mechanisms adopted by the *** propose that LIMK2-mediated cofilin phosphorylation is required for membrane cytoskeleton reorganization that is necessary for ASM mechanical adaption including the 5-HT-evoked length-sensitive effect.

关键词： Smooth muscle LIM kinases Cofilin Cytoskeleton Length sensitive effect

Cr含量及热处理对NbMoZrAl基高熵合金微观组织与力学性能的影响

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铸造 2024年第9期73卷 1210-1217页

作者：王涛时洁潘虎成商洪宇滕常青张伟杨吉军吴璐东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室辽宁沈阳110819 中国核动力研究设计院第一研究所四川成都610041 四川大学辐射物理与技术教育部重点实验室四川成都610064

采用真空电弧熔炼的方法制备了高熵合金(Nb_(70)Mo_(10)Zr_(10)Al_(10))_(100-x)Cr_(x)(x=5,10,15 at.%),通过X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)和电子万能试验机等研究了Cr含量和高温热处理对该合金微观组织和力学性能的... 详细信息

采用真空电弧熔炼的方法制备了高熵合金(Nb_(70)Mo_(10)Zr_(10)Al_(10))_(100-x)Cr_(x)(x=5,10,15 at.%),通过X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)和电子万能试验机等研究了Cr含量和高温热处理对该合金微观组织和力学性能的影响。结果表明,随着Cr元素的添加,合金中析出了Cr_(2)(Nb,Zr)型第二相,随着Cr元素含量的增加,第二相的体积分数增加且枝晶细化;经过1200℃、24 h的高温热处理后,更多的Cr元素扩散析出到枝晶间形成Laves相,并与Al-Zr相交错分布。NbMoZrAl-Cr合金压缩屈服强度逐渐从0Cr合金的945 MPa提升到5Cr合金的1153 MPa、10Cr合金的1212 MPa以及15Cr合金的1305 MPa,第二相强化及细晶强化是屈服强度提升的主要原因。相关结果将为新型难熔高熵合金的设计提供一定的参考和依据。

关键词：难熔高熵合金高温热处理力学性能热稳定性第二相

中药干预炎症细胞因子在骨关节炎中的作用研究进展

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风湿病与关节炎 2024年第6期13卷 64-68,80页

作者：魏晓涛何志军刘涛李金鹏陈杰王威威甘肃省中医院甘肃兰州730000 甘肃中医药大学甘肃兰州730000

骨关节炎是一种以累及关节疼痛剧烈为特征的常见的退行性疾病。骨关节炎发病机制复杂,与关节软骨损伤、软骨基质降解、软骨下骨重塑、炎症和软骨细胞凋亡代谢等诸多因素有关。转化生长因子-β、白细胞介素、基质金属蛋白酶、肿瘤坏死因... 详细信息

骨关节炎是一种以累及关节疼痛剧烈为特征的常见的退行性疾病。骨关节炎发病机制复杂,与关节软骨损伤、软骨基质降解、软骨下骨重塑、炎症和软骨细胞凋亡代谢等诸多因素有关。转化生长因子-β、白细胞介素、基质金属蛋白酶、肿瘤坏死因子-α、骨形态发生蛋白等细胞因子密切参与骨关节炎发生、发展。在中医学“整体观、个体化、治未病”理论和“通经活络、祛风散寒、强骨补肾”等治疗原则指导下,中医药治疗骨痹历史悠久、疗效稳定。兹通过查阅最新文献,总结上述细胞因子与骨关节炎的关系及中医药干预的最新成果,以期为骨关节炎的深入研究及临床运用中医药防治提供参考和依据。

关键词：骨关节炎细胞因子软骨修复炎症中医药

pH响应型自门控Fe_(3)O_(4)@SiO_(2)材料的合成及载药应用研究

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化学研究与应用 2024年第7期36卷 1545-1552页

作者：王灵晓韦皖豫范琪乔洁李宁波太原工业学院化学化工系山西太原030008 山西医科大学基础医学院山西太原030001

采用改进的Stober法制备了介孔硅包覆的磁性纳米材料,然后通过枝接的方法对材料表面进行了氨基化处理。将氨基化的介孔硅磁性材料与4-甲酰基苯甲酸结合形成醛基功能化的磁性介孔硅材料(CHOMMNPs),并与药物阿霉素(DOX)形成了pH响应型自... 详细信息

采用改进的Stober法制备了介孔硅包覆的磁性纳米材料,然后通过枝接的方法对材料表面进行了氨基化处理。将氨基化的介孔硅磁性材料与4-甲酰基苯甲酸结合形成醛基功能化的磁性介孔硅材料(CHOMMNPs),并与药物阿霉素(DOX)形成了pH响应型自门控载药复合材料(CHO-MMNPs/DOX)。通过透射电子显微镜、傅里叶红外光谱仪、X射线衍射仪和振动样品磁强仪等技术手段对复合材料的结构、性能和形貌进行了表征。结果显示,复合材料具有良好的形貌和单分散性,并具有超顺磁性。载药和释药实验表明,CHOMMNPs具有良好的载药性能,CHO-MMNPs/DOX在药物释放过程中表现出pH响应性和药物控释性。细胞毒性和荧光成像实验结果显示,复合材料具有良好的生物兼容性,能够成功地载药并被细胞摄取。

关键词：磁性纳米粒子介孔硅 pH响应阿霉素

High-performance all-polymer solar cells with only 0.47 eV energy loss

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Science China Chemistry 2020年第10期63卷 1449-1460页

作者： Qiang Wu wei wang tao wang Rui Sun Jing Guo Yao Wu Xuechen Jiao Christoph J.Brabec Yongfang Li jie Min The Institute for Advanced Studies Wuhan UniversityWuhan 430072China Beijing National Laboratory for Molecular Sciences Beijing 100190China Key Laboratory of Materials Processing and Mold(Ministry of Education) Zhengzhou UniversityZhengzhou 450002China Department of Materials Science and Engineering Monash UniversityAustralian SynchrotronClaytonVictoriaAustralia Institute of Materials for Electronics and Energy Technology(i-MEET) Friedrich-A lexander-Universitat-Erlangen-NiirnbergErlangenGermany

The field of all-polymer solar cells(all-PSCs)has experienced rapid development during the past few years,mainly driven by the development of efficient polymer ***,the power conversion efficiencies(PCEs)of the all-PSCs are still limited by insufficient light absorption of the donor/acceptor blend and large energy loss in *** herein designed a polymer acceptor PYT1 constructed n-type molecular acceptor Y5-C20 as the key building block and blended it with a polymer donor PM6 to obtain an all-polymer photoactive *** optimized PM6:PYT1 all-PSCs achieved a record higher PCE of 13.43%with a very low energy loss of 0.47 eV and a photoresponse of up to 900 nm compared with the Y5-C20 based device with a best PCE of 9.42%.Furthermore,the PCEs of the PM6:PYT1 all-PSCs are relatively insensitive to the 1-chloronaphthalene(CN)additive contents and active layer *** results also highlight the effect of CN additive on PM6:PYT1 morphology,i.e.,charge generation,and transport find an optimized balance,and radiative and non-radiative loss is simultaneously reduced in the *** work promotes the development of high-performance polymer acceptors and heralds a brighter future of all-PSCs for commercial applications.

关键词： all-polymer solar cells polymer acceptor absorption coefficient energy loss mechanical stability

Mechanical performance and texture characteristic of an IF steel containing Nb and Ti by double cold rolling

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 51-57页

作者： ling-yun wang Peng Zhang wei Li Guang-jie Huang College of Materials Science and Engineering Chongqing University Chongqing 400030 China Technology Institute of Sichuan Chuanwei Group Co. Ltd. Weiyuan 642400 China

Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios. The evolutions of { 100}, { 111} and Goss face texture during double rolling were investigated by comparing the orientation distribution function （ODF） of the double rolled sample with that of the single rolled one. The double cold rolling texture is characterized by a higher γ-texture and a lower α-texture, and the { 111}〈112〉 component is improved remarkably. Based on the TEM observation and mechanical properties test, it is found that the reduction ratio assignment significantly affects the texture variation, as-annealing microstructures, and properties of the double cold rolled samples. These results may provide a theoretical guide for the industrial production of double cold rolled IF steel.

关键词： IF steel cold rolling double cold rolling texture mechanical properties

Inhomogeneous ablation behaviors and failure mechanism of copper cathode in air

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Science China(Technological Sciences) 2020年第11期63卷 2384-2394页

作者： GUAN weiMian YUAN jie wang YongFeng ZHANG HuanYu LV Hao YANG Hong ZHU tao FANG YouTong LIU JiaBin wang Hongtao YANG wei School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Center for X-mechanics Faculty of EngineeringZhejiang UniversityHangzhou 310027China China Aerodynamic Research&Development Center Mianyang 621000China

The copper cathode ablation limits the maximum power and operating time of arc heaters *** this work,copper cathodes were tested in an ablation testing system to investigate the ablation behaviors and mechanism of copper cathode in *** microstructure of the ablated cathodes was analyzed,and the ablation rate was *** maximum depth and ablation rate increased with the electronic *** mean ablation rate was compared with the prediction by a thermophysical theoretical *** ablation pits formed in the ablated surface and evolved into crater-like structures with unexpected depth as the ablation time was *** presence of ablation pits and crater-like structures suggested an inhomogeneous ablation behavior of the copper cathode in *** underlying mechanism is proposed to explain the ablation failure of copper cathode in the high-power arc *** attention to improving the service life of copper cathode could be focused on the surface modification to reduce the ablation inhomogeneity.

关键词： ablation arc copper cathode microstructure