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Asian Pacific Journal of Tropical Medicine 2013年第12期6卷 960-963页

作者： ting tan Zhi-Qi Hu Epartment of Burn And Plastic Surgery Fuzhou General Hospital of Nanjing Command.PLA Department of Plastic Surgery Nan fang Hospital of Southern Medical University

Objective:To construct the retroviral vector pLEGFP-N1-telomerase reverse transcriptase(TERT)and to investigate the expression of TERT in neonatal mouse bypodermal ***:The polymerase chain reaction(PCR)-amplified TERT gene was inserted into plasmid *** positive clone was identified by restriction enzyme digestion and sequencing,then was transfected into packaging cells to produce retrovirus *** mouse hypodermal cells were infected with the virus to generate a stable cell *** TERT mRNA expression level,telomerase activity,and enhanced green fluorescent protein(EGFP)expression level were ***:Retroviral vector pLEGFP-N1-TERT was constructed successfully,and a stable cell line of neonatal mouse hypodermal cells expressing EGFP was *** blot and immunohistochemical assay showed that the expression level of TERT was significantly elevated in the neonatal mouse hypodermal ***:A high titer of retrovirus pLEGFP-N1-TERT mediates high-level expression of the exogenous TERT gene in the neonatal mouse hypodermal *** protocol has potential applications for skin tissue engineering and cell transplantation therapy.

关键词： Telomerase reverse transcriptase Retroviral vector Hypodermal cells

Electrical, Structural and Interfacial Characterization of HfO2 Films on Si Substrates

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Chinese Physics Letters 2011年第8期28卷 240-242页

作者： tan ting-ting LIU Zheng-tang LI Yan-Yan State Key Laboratory of Solidification Processing College of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072

Hafnium oxide films are deposited on Si(100)substrates by means of rf magnetron *** interfacial structure is studied using high-resolution transmission electron microscopy(HRTEM)and x-ray photoelectron spectroscopy(XPS),and the electrical properties of the Au/HfO_(2)/Si stack are analyzed by frequency−dependent capacitance-voltage(C–V–f)*** amorphous interfacial layer between HfO_(2) and the Si substrate is observed by the HRTEM *** the results of XPS,the interfacial layer comprises hafnium silicate and silicon *** C–V–f measurements,the C–V plots show a peak at a low frequency and the change in frequency has effects on the intensity of the *** expected,rapid thermal annealing can passivate the interface states of the HfO_(2)/Si stack.

关键词： C–V interfacial HfO2

Semisolid microstructural evolution of (CNTs+Sip)/AZ91D powder compacts prepared from powders by cold pressing and remelting

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Rare Metals 2020年第6期39卷 733-742页

作者： Pu-Bo Li Wan-ting tan Mang-Mang Gao Kuan-Guan Liu Ningxia Key Laboratory of Photovoltaic Materials Ningxia UniversityYinchuan 750021China

The evolution of semisolid microstructure during partial remelting of(CNTs+Sip)/AZ91 D powder compacts prepared by cold pressing was *** results indicate that rapid grain coarsening is driven by the dissolution of eutecticβphase material during the initial heating period of 0-10 min,so the AZ91 D powders with fine equiaxed grains surrounded by intergranular eutectic phases evolve into compact *** the heating time proceeds,α-Mg particles were gradually separated by liquid due to the phase transformations ofα-Mg+β→L andα-Mg→*** primary particles coarsened rather slowly and the as-received Mg powder evolved into nearly spheroidal particles surrounded by liquid phase after partial *** in situ synthesized Mg2 Sip were distributed homogeneously around the CNTs with maintained structural integrity during partial ***,this microstructural evolution was accompanied by densification through pore *** ideal semisolid ingot suitable for thixoforming can therefore be obtained by partially remelting a(CNTs+Sip)/Mg powder compact.

关键词： Semisolid microstructural evolution Densification Phase transformation Coarsening behavior

Nonlinear characterization and performance optimization for broadband bistable energy harvester

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Acta Mechanica Sinica 2020年第3期36卷 578-591页

作者： ting tan Zhimiao Yan Kejing Ma Fengrui Liu Linchuan Zhao Wenming Zhang State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Ocean Engineering School of Naval ArchitectureOcean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

As two crucial indicators of bistable energy harvesting performance,band width and power amplitude are simultaneously investigated for obtaining the synergy *** this goal,a nonlinear electromechanical-coupled distributed-parameter model of the bistable piezoelectric energy harvester is *** on the electromechanical decoupled method,approximate higher-order analytical solutions of the beam displacement,harvested power and effective bandwidth are *** cubic-function discriminant of the analytical solution is introduced to determine the nonlinear excitation-frequency boundaries of multiple solutions and power *** stability of the multiple solutions is analyzed through Jacobi matrix of the modulation *** resonance is *** and downward sweep experiments and numerical solutions of time history curves,phase portraits and power spectra confirm the analytical *** realize optimized broadband energy harvesting,the parametric study on the coefficients of the linear and cubic elastic external forces with the corresponding optimal load resistance is *** the nonlinear hardening case,more positive linear coefficient is *** the nonlinear softening case,the cubic coefficient slightly larger than its optimal value is recommended at each given linear *** tuning the load resistance and linear and cubic coefficients of the external force,broadband bistable energy harvesting with optimized power is realized.

关键词： Vibration energy harvesting Bistable solution Broadband Superharmonic resonance

高分辨率探测器短中波红外滤光片的设计及其光谱特性研究

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红外技术 2024年第5期46卷 592-598页

作者：陈永陈昕张一凡胡海波谈婷吕玮东周吉北京空间机电研究所北京100094

短中波红外滤光片是航天光学遥感相机上的关键器件之一。高分辨率探测器的光谱响应由滤光片的光谱特性决定,其中短中波红外占有很大比重,传统方式制备的短中波红外滤光片与理论值存在差距,使得短中波红外滤光片发生光谱角漂或温漂等现象... 详细信息

短中波红外滤光片是航天光学遥感相机上的关键器件之一。高分辨率探测器的光谱响应由滤光片的光谱特性决定,其中短中波红外占有很大比重,传统方式制备的短中波红外滤光片与理论值存在差距,使得短中波红外滤光片发生光谱角漂或温漂等现象,在高分辨率探测器中形成高频和低频光谱混合叠加导致复原光谱失真。本文提出了一种高透过率低漂移高分辨率探测器短中波红外滤光片的设计及研制方法。为了达到短中波红外滤光片特定波长滤光特性的要求(在3.5~4.1μm波段范围内实现98%以上透过率,在2.4~3.35μm、4.25~6.4μm两个波段范围内实现截止),以Si材料为滤光片的基底材料,采用模拟染色体遗传交叉算法以带通滤光高低反射率膜堆结构进行了结构迭代设计,薄膜的高折射率材料采用TiO_(2),低折射率材料采用SiO_(2),该结构设计使得膜层数量大为减少,通过温漂测试、角漂测试、光谱特性分析及面形测试,短中波红外滤光片达到了前后双波段截止、高通带透过率的目标。环境测试试验表明,短中波红外滤光片膜层与基底材料匹配性适宜、膜层稳定性较高,适用于空间严酷的温度变化、高能粒子辐照环境。

关键词：光学薄膜高分辨率探测器短中波红外光滤光片

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硫酸铝激发钢渣复合微粉的作用机理研究

材料导报 2024年第S1期38卷 333-337页

作者：孙浩胡凯伟李崇智谈珽林阿真彭家蔓江苏博思通新材料有限公司南京211700 北京建筑大学土木与交通工程学院北京100044 广西宝添环保材料有限公司南宁530001

本工作研究了掺硫酸铝钢渣复合微粉(SSCM)对混凝土工作性、抗压强度、抗氯离子渗透性和抗冻性等性能的影响,通过红外光谱、XRD、扫描电镜等检测分析,深入探讨了硫酸铝对SSCM的激发机理。硫酸铝可以加快掺SSCM混凝土的坍落度损失,促进混... 详细信息

本工作研究了掺硫酸铝钢渣复合微粉(SSCM)对混凝土工作性、抗压强度、抗氯离子渗透性和抗冻性等性能的影响,通过红外光谱、XRD、扫描电镜等检测分析,深入探讨了硫酸铝对SSCM的激发机理。硫酸铝可以加快掺SSCM混凝土的坍落度损失,促进混凝土强度提高,硫酸铝掺量为8%时,混凝土28 d抗压强度提高10%,同时提高了混凝土的抗氯离子渗透能力和抗冻性能。机理探讨认为,在SSCM-水泥体系中,随着硫酸铝掺量的变化,SSCM胶凝体系中大量的SO_(4)^(2)-和Al^(3+),生成溶度积极低的钙矾石,抑制氢氧化钙生成,初期大量生成钙矾石,促使钢渣中的硅酸钙、铝酸钙分解而激活。

关键词：硫酸铝钢渣复合微粉(SSCM) 工作性抗压强度抗氯离子渗透性抗冻性

Synthesis and in vitro Antibacterial Activities of 5-（2,3,4,5- Tetrahydro-1 H-chromeno[2,3-dJpyrimidin-5-yl）pyrimidione Derivatives

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Chinese Journal of Chemistry 2012年第2期30卷 386-390页

作者： Cheng,Qingfang Wang,Qifa tan,ting Wang,Mingxiao Chen,Na Department of Chemical Technology Huaihai Institute of TechnologyLianyungangJiangsu 222005China Jiangsu Key Laboratory of Marine Biotechnology Huaihai Institute of TechnologyLianyungangJiangsu 222005China

A series of novel 5-（2,3,4,5-tetrahydro-lH-chromeno[2,3-d]pyrimidin-5-yl）pyrimidione derivatives have been synthesized from substituted salicylaldehydes and barbituric acid or 2-thiobarbituric acid in water catalyzed by phase transfer catalysis of triethylbenzyl ammonium chloride （TEBA）. Elemental analysis, IR, 1HNMR, and 13C NMR elucidated the structures of all the newly synthesized compounds. In vitro antimicrobial activities of synthesized compounds have been investigated against Escherichia coli, Bacillus subtilis, Staphylococcus aureus, and Pseudornonas aeruginosa. These newly synthesized derivatives exhibited significant in vitro antibacterial activity.

关键词： 5-(2,3,4,5-tetrahydro-lH-chromeno[2,3-d]pyrimidin-5-yl)pyrimidione antibacterial activity phase transfer catalysis water

义务教育不同版本数学教材主题分布比较:基于主题追踪图的研究

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数学教育学报 2024年第1期33卷 71-76页

作者：杨涛杨建强王烨晖郏超超谭玉婷北京师范大学中国基础教育质量监测协同创新中心北京100875

教材是课程与教学的重要组成部分.研究基于TIMSS主题追踪图方法,选取中国义务教育阶段4种不同版本数学教材进行分析,并与TIMSS高成就国家和地区的主题分布比较.结果表明:(1)中国4种不同版本数学教材的主题数量随年级变化的整体趋势一致... 详细信息

教材是课程与教学的重要组成部分.研究基于TIMSS主题追踪图方法,选取中国义务教育阶段4种不同版本数学教材进行分析,并与TIMSS高成就国家和地区的主题分布比较.结果表明:(1)中国4种不同版本数学教材的主题数量随年级变化的整体趋势一致,主题内容都体现出从基础性到高阶性的渐进过程,主题分布有间断的比例在30.3%~48.5%之间,跨3个年级及以上的主题占比在39.4%~57.6%之间;(2)与TIMSS高成国家和地区相比,中国数学教材的主题略多,4年级前各年级的主题数量更多,主题分布的连贯性明显不及TIMSS高成就国家和地区,且年级跨度更小.研究启示:编写教材时要优化主题内容选择,关注教材内容组织方式,重视教材设计,此外要重视教材研究.

关键词：数学教材主题追踪图主题分布

杀菌剂甲基托布津和多菌灵对泥鳅的急性毒性及肝脏酶活性的影响

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水产学杂志 2024年第1期37卷 60-66页

作者：谭婷杨超超杨娜王琪雷忻延安大学生命科学学院陕西延安716000 延安市生态恢复重点实验室陕西延安716000

为了解甲基托布津(Methyltobuzine,TM)和多菌灵(Carbendazim,BCM)对水生动物的毒性效应,在水温(25±2)℃下,将平均体长(6.3±0.7)cm和平均质量(2.4±0.5)g的6月龄泥鳅(Misgurnus anguillicaudatus)置于65 mg·L^(-1)、85 mg·L^(-1)、112 mg·L^(-1)、146 mg·L^(-1)、191 mg·L^(-1)TM和26 mg·L^(-1)、34 mg·L^(-1)、45 mg·L^(-1)、58 mg·L^(-1)、76mg·L^(-1)BCM下,采用半静水实验法,研究TM和BCM的24 h、48 h、72 h、96 h的半致死浓度(LC50)和24 h安全浓度(SC);并在0.05 mg·L^(-1)、0.50 mg·L^(-1)、5.00 mg·L^(-1)TM和0.02 mg·L^(-1)、0.10 mg·L^(-1)、0.50 mg·L^(-1)、2.50 mg·L^(-1)BCM中胁迫7 d、14 d、21 d、28 d,检测泥鳅肝脏过氧化物酶(POD)、谷丙转氨酶(GPT)、谷草转氨酶(GOT)活性变化。结果表明,TM对泥鳅的24 h、48 h、72 h、96 h LC50分别为35.48 mg·L^(-1)、26.98 mg·L^(-1)、17.25 mg·L^(-1)和10.03 mg·L^(-1),24 h SC为6.16 mg·L^(-1);BCM对泥鳅的24 h、48 h、72 h、96 h LC50分别为23.53 mg·L^(-1)、17.66 mg·L^(-1)、6.54 mg·L^(-1)和3.58 mg·L^(-1),24 h SC为3.98 mg·L^(-1);TM和BCM胁迫下POD、GOT、GPT活性随浓度升高呈现先上升后下降的趋势,随着胁迫时间延长各参数的活性呈下调趋势。BCM处理组较TM处理组变化趋势更显著。综上所述,TM对6月龄泥鳅具有低毒性作用,BCM对6月龄泥鳅则具有中等毒性作用;一定剂量TM和BCM长期胁迫对泥鳅造成严重影响,对POD、GPT、GOT活性具有明显抑制作用,随胁迫时间延长抑制加剧,其中BCM较TM抑制作用更强。

关键词：泥鳅甲基托布津多菌灵急性毒性酶活性

Study on energy release characteristics of reactive material casings under explosive loading

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Defence Technology（防务技术） 2021年第5期17卷 1791-1803页

作者： Ning Du Wei Xiong Tao Wang Xian-feng Zhang Hai-hua Chen Meng-ting tan School of Mechanical Engineering Nanjing University of Science&TechnologyNanjingXiaolingwei 200Jiangsu210094China School of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjingYudaojie 29Jiangsu211106China

Reactive Materials(RMs),a new material with structural and energy release characteristics under shockinduced chemical reactions,are promising in extensive applications in national defense and military *** can increase the lethality of warheads due to their dual *** paper focuses on the energy release characteristics of RM casings prepared by alloy melting and casting process under explosive *** experiments of RM and conventional 2A12 aluminum alloy casings were conducted in free field to capture the explosive fireballs,temperature distribution,peak overpressure of the air shock wave and the fracture morphology of fragments of reactive material(RM)warhead casings by using high-speed camera,infrared thermal imager temperature and peak overpressure testing and scanning electron *** showed that an increase of both the fireball temperature and air shock wave were observed in all RM casings compared to conventional 2A12 aluminum ally *** RM casings can improve the peak overpressure of the air shock wave under explosion loading,though the results are different with different charge *** to the energy release characteristics of the RM,increasing the thickness of RM casings will increase the peak overpressure of the near-field air shock wave,while reducing the thickness will increase the peak overpressure of the far-field air shock wave.

关键词： Reactive materials Explosive loading Shock-induced chemical reaction Energy release characteristics Fragmentation