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Synthesis, characterization, cytotoxicity, DNA cleavage and antimicrobial activity of homodinuclear lanthanide complexes of phenylthioacetic acid

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Journal of Rare Earths 2013年第10期31卷 1009-1016页

作者： t. f. Abbs fen Reji A. Jeena Pearl Bojaxa A. Rosy Department of Chemistry & Research Centre Nesamony Memorial Christian College Department of Chemistry& Research Centre Scott Christian College Department of Botany & Research Centre Holy Cross College (Autonomous)

Lanthanide complexes of Eu（III）, Gd（III）, Nd（III）, Sm（III）, and tb（III） with phenylthioacetic acid were synthesized and characterized by elemental analysis, mass, infrared radiation （IR）, electronic spectra, molar conductance, thermogravimetric analysis （tGA）, and powder X-ray diffraction （XRD）. the results showed that the lanthanide complexes were homodinuclear in nature. the two lanthanide ions were bridged by eight oxygen atoms from four carboxylate groups. thermal decomposition profiles were consis- tent with the proposed formulations. Powder XRD studies showed that all the complexes were amorphous in nature. Antimicrobial studies indicated that these complexes exhibited more activity than the ligand itself. the DNA cleavage activity of the ligand and its complexes were assayed on Ct DNA using gel electrophoresis in the presence of H202. the result showed that the Eu（Ⅲ） and Nd（Ⅲ） complexes completely cleaved the DNA. the anticancer activities of the complexes were also studied towards human cervical cancer cell line （HeLa） and colon cancer cells （HCt116） and it was found that the Eu（Ⅲ） and Nd（Ⅲ） complexes were more active than the corresponding Gd（Ⅲ）, Sm（Ⅲ）, tb（Ⅲ） complexes and the free ligand on both the cancer cells.

关键词： lanthanide complexes phenylthioacetic acid antimicrobial DNA cleavage anticancer rare earths

MAGNEtORESIStANCE EffECt OBSERVED IN fe/Mo MULtILAYERS PREPARED BY ELECtRON BEAM EVAPORAtION

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Acta Metallurgica Sinica(English Letters) 2003年第3期16卷 237-240页

作者： t.He B.Zhao Y.Gao f.Zeng f.Pan Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084 China

the fe/Mo multilayers were prepared by electron beam evaporation, the micro structure and magnetic properties of the multilayers were studied by X-ray diffraction, vibrating-sample magnetometer (VSM) et al. the experimental results revealed that the fe/Mo multilayers in our experimental conditions behaved magnetoresistance effect with a sharp peak on magnetoresistance (MR) ratio curve, and magnetoresistance is easily saturated at low applied magnetic fields. for [fe(1.5nm)/Mo(1.0nm)]4,2 multilayers, MR ratio could arrive to 0.1%. the ant.ferromagnetic interlayer coupling could be observed in some films at room temperature. the strength of the ant.ferromagnetic interlayer coupling J in the films is low because of the low saturation field Hs. the relationship between magnetic properties and micro structure was also discussed in this paper.

关键词： magnetoresistance multilayer ant.ferromagnetic interlayer coupling nonmagnetic scattering

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先进双极微电路的快速退火

微电子学 1984年第5期 76-81页

作者： t.f Wrobel D.C Evans 胡绍武桑迪亚国家实验室

本文论述了器件在快速中子脉冲群的辐照以后,有关迅速退火的几种新工艺。已发现“劈出”（breakout）器件的退火响应和已有工艺模型的预计值相一致。并给出了从已有模型得到的分析表达式。几种“劈出”器件的研究结果表明:根据某些工艺... 详细信息

本文论述了器件在快速中子脉冲群的辐照以后,有关迅速退火的几种新工艺。已发现“劈出”（breakout）器件的退火响应和已有工艺模型的预计值相一致。并给出了从已有模型得到的分析表达式。几种“劈出”器件的研究结果表明:根据某些工艺研究制造出来的数学集成电路,中子辐照强度可超过1×1015NVt（E>10K-eV）。此外还介绍了fASt和ALS与非门的中子辐照响应数据。

关键词：中子辐照 StL 与非门基极响应数据列线图解直流增益 ALS 快速退火器件吸收电流预计值肖特基发射极晶体管逻辑电路模型

AN APPLICAtION Of fOKKER-PLANCK EQUAtION tO JOSEPHSON JUNCtION

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Acta Mathematica Scientia 1989年第1期9卷 109-120页

作者： G.Liao A.f.Laurence A.t.Abawi Department of Mathematics University of Utah Salt Lake City UT 84112Center for Molecular Electronics Carnegie-Mellon University Pittsburg PA 15213Department of Physics University of California San Diego La Jolla CA 92093

A long Josephson junction can be modeled by a perturbed sine-Gordon equation. Based on a soliton perturbation theory, the probability distribution of the velocity of a single soliton, at the presence of a white noise contained in bias current, is studied by the fokker-Planck method. this approach can be extended to the study of multisolitons.

关键词： soliton perturbation perturbed junction contained modeled Planck normalized Langevin formal

Responses of five woody species to burial by marly sediment: the role of biomass allocation pattern flexibility

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Journal of Plant Ecology 2012年第3期5卷 287-293页

作者： M.Burylo f.Rey t.Dutoit Cemagref Grenoble UR Ecosystemes Montagnards2 rue de la PapeterieBP 7638402 Saint Martin d’Heres CedexFrance Institut Mediterraneen d’Ecologie et de Paleoecologie Unite Mixte de Recherches CNRS-IRDInstitut Universitaire deTechnologieUniversite d’AvignonAgroparcBP 120784911 Avignon Cedex 9France

Aims In eroded lands of the french Southern Alps,burial of early established seedlings under marly sediment weakens the effect of vegetation on soil stabilization and sediment ***,this protective role is largely dependent on species’resistance to burial,and the understanding of species’tolerance to this environmental disturbance is highly valuable for basic knowledge on plant succession and for ecological restoration *** the response of five woody species with contrasting ecological requirements and natural habitats—three tree species,Pinus nigra,Robinia pseudoacacia and Acer campestre,and two shrubs,Ononis fruticosa and Hippophae rhamnoides—to experimental burial under marly sediment was *** were exposed to three burial levels:no burial(control),partial burial(50%of seedling height)and complete burial(100%of seedling height).Burial tolerance was evaluated based on seedling survival,height and *** allocation to shoots and roots and soluble sugar and starch contents in roots and stems were measured to ident.fy plant traits that determine species response to *** findings All species survived partial burial but only *** seedlings emerged from complete *** species were more tolerant to burial and buried plants showed no significant differences with *** two shrubs were found less tolerant and buried plants showed slower growth than *** results showed that species response was not related to initial soluble and starch content in roots and stems,but instead to biomass allocation pattern flexibility.

关键词： burial sediment marls response to burial plant traits

tHEOREtICAL StUDY Of HEAt tRANSfER ENHANCEMENt IN PIPE WItH POROUS BODY

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Journal of Hydrodynamics 2001年第1期13卷 111-116页

作者： Gong, W.P. Han, J.t. Cheng, f. Dep. of Power Eng. Shandong Univ. Jinan 250061 China

A theoretical investigation on the fluid flow and heat transfer in a pipe with porous body of high porosity twisted by metal wire was carried out. A theoretical model of a circular pipe with porous matrix attached at the channel wall and extended inward the centerline was set up. through analyzing the flow in the porous matrix by the Brinkman-extended-Darcy equation and through including the effect of dispersion by adding the dispersion coefficient into the energy equation, the theoretical solutions of velocity distribution and temperature fields were obtained. finally the effect of the properties of the porous matrix on the flow and heat transfer in the porous body was studied, which indicates that dispersion can really enhance the heat transfer in pipe.

关键词： Computer simulation Dispersions Mathematical models Pipe flow Porosity Porous materials

Peristaltic flow with convective mass condition and thermal radiation

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Journal of Central South University 2015年第6期22卷 2369-2375页

作者： f.M.Abbasi t.Hayat B.Ahmad B.Chen Department of Mathematics Comsats Institute of Information Technology Department of Mathematics Quaid-I-Azam University 45320 Islamabad 44000 Pakistan Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Faculty of ScienceKing Abdulaziz University State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University

the primary objective of present investigation is to introduce the novel aspects of convective mass condition and thermal radiation in the peristaltic transport of fluid. Magnetohydrodynamic(MHD) fluid was considered in a symmetric channel. Heat and mass transfer characteristics were analyzed in the presence of Soret and Dufour effects, and the results were presented via two forms of thermal radiation. the temperature, concentration and pressure rise per wavelength were examined. It is observed that the velocity slip and magnetic field parameters have opposite effects on the pressure rise per wavelength. temperature of fluid is a decreasing function of the radiation parameter. further, the temperature of fluid decreases by increasing the heat transfer Biot number. It is not.fied that the heat transfer rate at the wall is a decreasing function of radiation parameter.

关键词： convective mass condition thermal radiation magnetohydrodynamic (MHD) fluid

Cattaneo-Christov heat.flux model for third-grade fluid flow towards exponentially stretching sheet

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Applied Mathematics and Mechanics(English Edition) 2016年第6期37卷 761-768页

作者： S.A.SHEHZAD f.M.ABBASI t.HAYAt B.AHMAD Department of Mathematics Comsats Institute of Information TechnologySahiwal 57000Pakistan Department of Mathematics Comsats Institute of Information TechnologyIslamabad 44000Pakistan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan NAAM Research Group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

the Cattaneo-Christov heat.flux in the two-dimensional （2D） flow of a third- grade fluid towards an exponentially stretching sheet is investigated. the energy equation is considered through thermal relaxation. Similarity transformations are accounted to obtain the ordinary differential systems. the converted non-dimensional equations are solved for the series solutions. the convergence analysis of the computed solutions is reported. the graphical results of the velocity and temperature profiles are plotted and elaborated in detail. the results show that the thermal relaxation enhances the temper- ature gradient while reduces the temperature profile.

关键词： steady flow third-grade fluid Cattaneo-Christov heat.flux exponentiallystretching sheet

first-Principle Calculations of Hardness and Melting Point of Mo_2C

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Journal of Materials Science & technology 2009年第3期25卷 419-422页

作者： X.R. Wang M.f. Yan H.t. Chen School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

this paper has constructed two kinds of atomic and electronic models for hexagonal β-Mo2C and orthorhombic α-Mo2C. the optimized lattice parameters, elastic constant matrixes and overlap population for Mo2C crystal cells have been obtained to realize the characterization of the hardness and melting point of the two structures by the first-principles plane wave pseudo potential method based on the density functional theory. the results reveal that the calculated lattice parameters of the Mo2C crystal cells agree with the experimental and other calculated data. the calculated melting point/hardness are 2715 K/11.38 GPa for β-Mo2C and 2699 K/10.57-12.67 GPa for α-Mo2C, respectively. the calculated results from the density of states （DOS） demonstrate that the hybridization effect between Mo-3d and C-2p states in α-Mo2C crystal cell is much stronger than that in β-Mo2C one.

关键词： first-principle Mo2C Hardness Melting point Density of states