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Chinese Journal of Structural Chemistry 2007年第5期26卷 572-574页

作者： tan ting-Feng Department of Materials Science ＆ Engineering Tianjin Institute of Urban Construction Tianjin 300384 China

The title compound 2 （C30H27N3O, Mr = 445.55） has been synthesized and its structure was determined by X-ray crystallography method. The crystal is of monoclinic, space group P21/c with a = 17.520（15）, b = 8.640（7）, c = 15.439（13） A, β = 98.642（14）°, V = 2310（3） 3, Dc = 1.281 g/cm^3, μ = 0.780 mm^-1, F（000） = 944, Z = 4, the final R = 0.0671 and wR = 0.1790 for 1952 observed reflections with Ⅰ 〉 2σ（Ⅰ）. X-ray analysis revealed that the interatomic distance of C（20）O（1） is 1.464（4） , longer than that of the normal C-O bond （1.41～1.43 A） in the six-membered heterocycle, but this kind of change coincides with other spiro compounds. The six-membered heterocycle containing spiro Csp3-O is nonplanar. The UV-vis spectra of the title compound in polymer films showed that it exhibits excellent photochromic property.

关键词： spirooxazine crystal structure photochromism

Annealing Effects on Structural,Optical Properties and Laser-Induced Damage Threshold of MgF2 Thin Films

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Acta Metallurgica Sinica(English Letters) 2017年第1期30卷 73-78页

作者： ting-ting tan Bang-Jie Liu Zhi-Hui Wu Zheng-tang Liu State Key Lab of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China

The chemical structures, optical properties and laser-induced damage thresholds of magnesium fluoride films annealed at different temperatures were investigated. The results showed that the stoichiometry of MgF2 film changed a little with the increase in annealing temperature. Analysis of the optical properties indicated that excellent antireflection behavior of the film in the range of 200-400 nm can be obtained by the samples coated with MgF2 film. The refractive index increased and the extinction coefficient decreased with increasing annealing temperature. Compared with the asdeposited films, the laser-induced damage threshold was improved after annealing process and decreased with the increase in annealing temperature, which was probably due to the denser film and more absorption centers under higher annealing temperature.

关键词： Annealing temperature Chemical structure Optical properties Laser-induced damage threshold (LIDT) MgF2 films

Bipolar Resistive Switching Characteristics of TiN/HfO_(x)/ITO Devices for Resistive Random Access Memory Applications

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Chinese Physics Letters 2013年第10期30卷 152-155页

作者： tan ting-ting CHEN Xi GUO ting-ting LIU Zheng-tang State Key Lab of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072

Resistive switching characteristics of hafnium oxide are studied for possible nonvolatile memory device *** HfOx films with different oxygen contents are deposited by rf magnetron sputtering under different O_(2) flow *** films are amorphous,and the stoichiometric of the film is improved by increasing the O_(2) flow ***-voltage characteristics of the TiN/HfOx/ITO device are investigated with 1 mA *** bipolar resistive switching behavior is observed for the TiN/HfOx/ITO structure,and the resistive switching mechanism of the TiN/HfOx/ITO structure is explained by trap-controlled space charge limit current conduction.

关键词： structure conduction amorphous

DES-Fe3O4 composite for rapid extraction of residual plant growth regulators in edible vegetable oil

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Chinese Chemical Letters 2019年第6期30卷 1182-1185页

作者： ting tan Xiaomei Xu Yiqun Wan State Key Laboratory of Food Science and Technology Nanchang University Nanchang 330047 China Center of Analysis and Testing Nanchang University Nanchang 330031 China School of Chemistry Nanchang University Nanchang 330031 China

A rapid DES-Fe3O4 microextraction coupled with liquid chromatography method was ingeniously developed for simultaneous control of five typical plant growth regulators in a planting cycle including indole-3-acetic acid, abscisic acid, thidiazuron, 1-naphthylacetic acid and forchlorfenuron. The experiments were carried out with one type of carboxylic acid-assisted deep eutectic solvent (nChCl:nacetic acid=1:3) as extractant, coupled with ultrasonic wave extraction for 30 min at bath temperature at 50 ℃. Under the optimum conditions, good extraction performances of linearities for five plant growth regulators were achieved separately in the range of 0.10–50 mg/L of indole-3-acetic acid, 0.06–50 mg/L of abscisic acid, 0.20–50 mg/L of thidiazuron, 0.50–50 mg/L of 1-naphthylacetic acid and 0.06–50 mg/L of forchlorfenuron and recoveries were ranged from 70.4%to 102.2%. Meanwhile, Fe3O4 was preferentially combined with DES in the oil matrix, the advantage of which was pointed to rapid and efficient separation of targeted plant growth regulators from complicated oil matrix. The proposed approach achieved satisfied results and met the monitoring requirements of plant growth regulators control in edible vegetable oil samples.

关键词： DES-Fe3O4 composite Deep eutectic solvent Rapid separation Plant growth regulators Edible vegetable oil

Construction and expression of retroviral vector pLEGFP-N1-TERT in preparation of seed cells for skin tissue engineering

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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

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

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