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Synthesis and electrochemical performance of yF_3-coated LiMn_2O_4 cathode materials for Li-ion batteries

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Rare Metals 2011年第1期30卷 39-43页

作者： CAO jina CAO Gaoshao yU Hongming XIE Jian ZHAO Xinbing Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Spinel LiMn2O4 cathodes were coated with 1 mol% yF3.X-ray diffraction（XRD） analyses showed that y and/or F did not enter the lattice of the LiMn2O4 *** electron microscopy（TEM） showed that a compact yF3 layer of 5-20 nm in thickness was coated onto the surface of LiMn2O4 *** electron microscopy（SEM） observation showed that the yF3 coating caused the agglomeration of LiMn2O4 *** cycling test demonstrated that the yF3 coating can improve the electrochemical performance of LiMn2O4 at both 20 and 55°***,yF3-coated LiMn2O4 exhibited an improved rate capability compared with the uncoated one at high rates over *** immersion test in electrolytes showed that yF3-coated LiMn2O4 is more erosion resistant than the uncoated one.

关键词： lithium batteries coatings cathodes electrochemical properties

An experimental study of premixed laminar methane/oxygen/argon flames doped with hydrogen at low pressure with synchrotron photoionization

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Chinese Science Bulletin 2008年第8期53卷 1262-1269页

作者： WANG JinHua HU ErJiana HUANG ZuoHua MA ZhiHao TIAN Zhenyu WANG jina LI yuyana State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

Laminar premixed stoichiometric methane/hydrogen/oxygen/argon flames were investigated with tun- able synchrotron vacuum ultraviolet (VUV) photoionization and molecular-beam sampling mass spec- trometry techniques. The methane/hydrogen fuel blends with hydrogen volumetric fraction of 0, 20%, 40%, 60% and 80% were studied. All observed flame species, including stable intermediates and radi- cals in the flames, were detected by measuring photoionization mass spectra and photoionization effi- ciency (PIE) spectra. Mole fraction profiles of major species and intermediates were derived by scan- ning burner at some selected photon energies near ionization thresholds. The influence of hydrogen addition on mole fraction of major species and intermediates was analyzed. The results show that the major species mole fraction of CO, CO2 and CH4 decreases with the increase of hydrogen fraction. The mole fraction of intermediates measured in this experiment decreases remarkably with the increase of hydrogen fraction. This would be due to the increase of H and OH radicals by hydrogen addition and the high diffusivity and activity of H radical promoting the chemical reaction. In addition, the increase of H/C ratio with the increase of hydrogen fraction also leads to the decrease of the mole fraction of car- bon-related intermediates and contributes to the decrease of unburned and incomplete combustion products.

关键词：甲烷氢混合火焰同步加速器 MBMS

Natural Selection on Human y Chromosomes

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Journal of Genetics and Genomics 2014年第2期41卷 47-52页

作者： Chuan-Chao Wang Li jina Hui Li State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology School of Life SciencesFudan University CAS-MPG Partner Institute for Computational Biology Shanghai Institutes for Biological SciencesChinese Academy of Sciences

In the field of anthropology, the uniparerttally inherited y chromosome has long been used to trace the paternal lineage of the populations and to understand differences in migration and population genetics between males and females, with additional advantages of small effective population size, suf- ficient markers, and population-specific haplotype distribution （Jobling and Tyler-Smith, 1995; Jin and Su, 2000; Underhill et al., 2000）. Many such population studies have rested on the assumption that all the y chromosome markers in the non- recombination regions are selectively neutral （Jobling and Tyler-Smith, 2003）.

关键词： mtDNA Natural Selection on Human y Chromosomes

THE　MULTI─ASSOCIATION　MODEL　OF　THE　ESR─ACIDITy　SENSITIVE　FREE　RADICAL：A　THEORETICAL　STUDy

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中国科学院大学学报(中英文) 1995年第1期 52-60页

作者： Zhu jina yan Jing Chen ya-ling Zhang Jian-zhong yan Da-yu

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ＴＨＥＭＵＬＴＩ─ＡＳＳＯＣＩＡＴＩＯＮＭＯＤＥＬＯＦＴＨＥＥＳＲ─ＡＣＩＤＩＴＹＳＥＮＳＩＴＩＶＥＦＲＥＥＲＡＤＩＣＡＬ：ＡＴＨＥＯＲＥＴＩＣＡＬＳＴＵＤＹ￥ＺｈｕＪｉｎａ；ＹａｎＪｉｎｇ；ＣｈｅｎＹａ－ｌｉｎｇ；ＺｈａｎｇＪｉａｎ－ｚｈｏｎｇ；Ｙ...

关键词： multi-association model ESR-acidity free radical

Down-regulation of Fra a 1.02 in strawberry fruits causes transcriptomic and metabolic changes compatible with an altered defense response

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Horticulture Research 2021年第1期8卷 777-789页

作者： Begona Orozco-Navarrete jina Song Ana Casanal Rosangela Sozzani Victor Flors Jose F.Sanchez-Sevilla Johanna Trinkl Thomas Hoffmann Catharina Merchante Wilfried Schwab Victoriano Valpuesta Laboratorio de Bioquimica y Biotecnologia Vegetal Instituto de Hortofruticultura Subtropical y Mediterranea(IHSM)Universidad de Malaga-Consejo Superior de Investigaciones CientificasDepartamento de Biologia Molecular y BioquimicaFacultad de CienciasUMAMalagaSpain Department of Plant and Microbial Biology North Carolina State UniversityRaleighNCUSA Metabolic Integration and Cell Signalling Group Plant Physiology SectionDepartment of Ciencias Agrarias y del Medio NaturalUniversitat Jaume ICastelloSpain Departamento de Genomica y Biotecnologia IFAPAMalagaSpain Biotechnology of Natural Products Technische Universität MünchenLiesel-Beckmann-Str.185354 FreisingGermany

The strawberry Fra a 1 proteins belong to the class 10 Pathogenesis-Related(PR-10)*** strawberry,a large number of members have been identified,but only a limited number is expressed in the *** this organ,Fra a 1.01 and Fra a 1.02 are the most abundant Fra proteins in the green and red fruits,respectively,however,their function remains *** know the function of Fra a 1.02 we have generated transgenic lines that silence this gene,and performed metabolomics,RNA-Seq,and hormonal *** studies associated Fra a 1.02 to strawberry fruit color,but the analysis of anthocyanins in the ripe fruits showed no diminution in their content in the silenced *** ontology(GO)analysis of the genes differentially expressed indicated that oxidation/reduction was the most represented biological *** state was not apparently altered since no changes were found in ascorbic acid and glutathione(GSH)reduced/oxidized ratio,but GSH content was reduced in the silenced *** addition,a number of glutathione-S-transferases(GST)were down-regulated as result of Fra a *** highly represented GO category was transport which included a number of ABC and MATE *** the regulatory genes differentially expressed WRKy33.1 and WRKy33.2 were down-regulated,which had previously been assigned a role in strawberry plant defense.A reduced expression of the VQ23 gene and a diminished content of the hormones JA,SA,and IAA were also *** data might indicate that Fra a 1.02 participates in the defense against pathogens in the ripe strawberry fruits.

关键词： straw content fruits

稀土镁合金表面激光TiB_2合金化层的结构与性能

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特种铸造及有色合金 2012年第11期32卷 1070-1073页

作者：徐开东王继娜河南城建学院土木与材料工程系

采用新型高性能TiB2陶瓷微粉体,以Al粉作为粘结相,通过Nd∶yAG激光表面合金化工艺,对耐热、高强Mg-Gd系变形镁合金进行了表面激光合金化处理。利用SEM、XRD、TEM、显微硬度仪、摩擦磨损试验机和ZahnerIM6ex型电化学工作站分别对不同TiB... 详细信息

采用新型高性能TiB2陶瓷微粉体,以Al粉作为粘结相,通过Nd∶yAG激光表面合金化工艺,对耐热、高强Mg-Gd系变形镁合金进行了表面激光合金化处理。利用SEM、XRD、TEM、显微硬度仪、摩擦磨损试验机和ZahnerIM6ex型电化学工作站分别对不同TiB2含量合金化层的精细结构、物相、耐磨及耐蚀性能等进行了检测和分析。结果表明,合金化层中Al元素与镁合金基体中的Gd、y等元素产生了原位反应,生成了高温硬质相Al2Gd和Al2y等金属间化合物,且强化相TiB2未发生分解;原位合成的金属间化合物尺寸为100nm左右,强化相TiB2粒度为200nm左右,强化相与基体相容性良好,呈均匀分布,但分布特点和结构差异显著;合金化层整体显微硬度提高达4～6倍,且随着TiB2含量增多而增大;摩擦因数和磨损质量损失却表现出了相反的变化趋势;在一定配比范围内,激光表面合金化处理能有效改善镁合金的耐蚀性能。

关键词：镁合金激光表面TiB2合金化精细结构性能

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天然气管道在役修补焊接过程的数值模拟

焊接学报 2019年第10期40卷 111-115,120,I0006页

作者：刘永滨冯立德张季娜许志武李政玮中石油昆仑燃气有限公司燃气技术研究院哈尔滨150010 昆仑能源有限公司北京100101 哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150010

文中采用MSC·Marc软件对天然气管道在役修补焊接过程进行数值模拟.采用的焊接方式为钨极惰性气体保护焊.焊接过程中熔池底部未熔化材料受高温后强度降低,管道内部的压力易导致其失效.温度场分析结果表明,当焊接电流为220 A时,管道内壁... 详细信息

文中采用MSC·Marc软件对天然气管道在役修补焊接过程进行数值模拟.采用的焊接方式为钨极惰性气体保护焊.焊接过程中熔池底部未熔化材料受高温后强度降低,管道内部的压力易导致其失效.温度场分析结果表明,当焊接电流为220 A时,管道内壁温度峰值为1131℃,低于管道材料的熔点,该温度下材料的屈服强度远高于管道内压.当焊接电流介于240~260 A范围时,容易发生焊透缺陷.盖板周围为封闭环焊缝,其应力场相比于直焊缝较复杂,模拟结果显示其等效残余应力分布不对称,在焊缝的收弧区域出现峰值,220 A焊接电流下为212.3 MPa.盖板沿着管道径向方向发生收缩变形,最大变形量为1.79 mm.

关键词：在役修补焊接数值模拟温度场应力场变形

铁皮石斛多糖基于Notch信号通路抗大鼠肝纤维化作用及其超声评价

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中国实验方剂学杂志 2024年第21期30卷 70-77页

作者：许颖罗继娜杨柳青田纤纤成家茂陈海燕大理大学临床医学院云南大理671003 大理白族自治州人民医院云南大理671000 大理大学基础医学院云南大理671003 大理大学第一附属医院云南大理671000

目的:探讨铁皮石斛多糖(DOP)基于Notch信号通路逆转四氯化碳(CCl4)诱导大鼠肝纤维化(HF)的作用,并采用超声弹性成像技术评价药物疗效。方法:将56只雄性SD大鼠随机分成正常组、模型组、秋水仙碱组、扶正化瘀组、DOP低、中、高剂量组,每组... 详细信息

目的:探讨铁皮石斛多糖(DOP)基于Notch信号通路逆转四氯化碳(CCl4)诱导大鼠肝纤维化(HF)的作用,并采用超声弹性成像技术评价药物疗效。方法:将56只雄性SD大鼠随机分成正常组、模型组、秋水仙碱组、扶正化瘀组、DOP低、中、高剂量组,每组8只。模型组及各给药组均皮下注射CCl4-橄榄油(2∶3)混合液,每3 d注射1次,共10周。造模6周后,各给药组分别给予秋水仙碱(1×10^(-4) g·kg^(-1))、扶正化瘀胶囊粉(0.45 g·kg^(-1))和低、中、高剂量DOP(0.05、0.1、0.2 g·kg^(-1))连续灌胃4周,每日1次。采用苏木素-伊红(HE)和马松(Masson)染色观察大鼠肝组织的病理形态学改变。采用全自动生化分析仪分析血清肝功能指标丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、总胆汁酸(TBA)和碱性磷酸酶(ALP)水平;采用酶联免疫吸附测定法(ELISA)检测血清肝纤四项指标透明质酸(HA)、层黏连蛋白(LN)、Ⅲ型前胶原(PC-Ⅲ)、Ⅳ型胶原(Col-Ⅳ)含量。分别采用实时荧光定量聚合酶链式反应(Real-time PCR)和蛋白免疫印迹法(Western blot)检测大鼠肝组织中的α-平滑肌肌动蛋白(α-SMA)、Notch1、Jagged1、Hes1的mRNA和蛋白表达。采用声辐射力脉冲(ARFI)弹性成像技术获取大鼠肝脏的杨氏模量(yM),观察DOP用药前后yM的变化,并分析yM与肝纤四项、肝组织中α-SMA和Notch1信号通路相关因子蛋白的相关性。结果:与正常组比较,模型组大鼠的肝组织病理检查结果显示,肝组织肝细胞索排列紊乱,炎性细胞浸润明显,出现大量的脂肪空泡和纤维组织增生;大鼠的血清肝功能和肝纤四项表达均显著升高(PyM显著升高(PyM均显著下降(PyM与HA、LN、PC-Ⅲ及α-SMA、Notch1、Jagged1和Hes1蛋白均呈强正相关(r分别为0.754、0.734、0.801、0.885、0.896、0.757、0.800,PyM有利于DOP抗HF程度和疗效的评估。

关键词：铁皮石斛多糖肝纤维化 Notch信号通路超声评价杨氏模量

TiO_2-coated SnO_2 hollow spheres as anode materials for lithium ion batteries

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Rare Metals 2011年第6期30卷 589-594页

作者： yI Jin LI Xiaoping HU Shejun LI Weishan ZENG Ronghua FU Zhao CHEN Lang School of Chemistry and Environment South China Normal University Guangzhou 510006 China Key Laboratory of Electrochemtcal Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes Guangzhou 510006 China Engineering Research Center of Materials and Technology for Electrochemical Energy Storage Ministry of Education Guangzhou 510006 China

TiO2-coated SnO2 （TCS） hollow spheres, which are new anode materials for lithium ion （Li-ion） batteries, were prepared and characterized with X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, cyclic voltammetry （CV）, and galvanostatic charge/discharge tests. The results obtained from XRD, SEM, and TEM show that TiO2 can be uniforrrdy coated on the surface of SnO2 hollow spheres with the assistance of anionic surfactant. The cyclic voltammograms indicate that both TiO2 and SnO2 exhibit the activity for Li-ion storage. The charge/discharge tests show that the prepared TCS hollow spheres have a higher reversible coulomb efficiency and a better cycling stability than the uncoated SnO2 hollow spheres.

关键词： TiO2-coated SnO2 hollow spheres anode lithium ion batteries