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Climate Evolution Recorded by Organic Carbon Stable I sotope since 5 *** Poyang Lake Area, China

Journal of China University of Geosciences 2003年第1期14卷 25-27页

作者： Peng Hongxia Li Chang’an Shi Chaoyi Yang Chao Huang Changsheng Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 Faculty of Earth Sciences China University of GeosciencesWuhan 430074

Based on the data of organic carbon stable isotope ratios and magnet ic susceptibility. climate evolution in the past 5 kaB.P. in Poyang Lake plain (in Jiangxi Province) has been reconstructed. The results of the research indicate that the climate evolution can be divided into nine stages in the past 5 kaB.P.. Comparisons of different regional environmental records suggest that the intens ity and the temporal spatial changes of monsoon in China mainly controlled the climate evolution.

关键词： Poyang Lake area paleoclimate evolution organic carbon stable isoto pe ratios magnetic susceptibility.

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Electric and magnetic Properties of Graded Oriented Polymer Composites

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Journal of Electrical Engineering 2016年第4期4卷 196-202页

作者： Jimsher Aneli Levan Nadareishvili Lana Shamanauri Institute of Machine Mechanics 10 Mindeli Str. Tbilisi 0186 Georgia

The character of variations of the local electric resistance and magnetic susceptibility.of film polymer composites with graded anisotropic structures on the basis of polyvinyl alcohol, graphite and nickel nano-powders have been studied. Graded anisotropic structures are formed after orientation （stretching） in spatial conditions of thin polymer composites. Structure anisotropy leads to anisotropy both electrical conductivity and magnetic properties of these films. It is established that the changes of these parameters essentially depend on both initial shape of the films and on direction of their orientation. So, after orientation of the rectangle films parallel to it any side forms the film, electrical resistance of which in parallel and rectangle directions to orientation axis changes by Gauss low. The composites containing the magnetic particles after orientation are characterized with analogical regularity （extreme dependence of the magnetic susceptibility.on the coordinates of the film along and perpendicular to stretching directions）. Gradient distribution of the local resistances and magnetic susceptibilities in the stretched films along and rectangle to stretching direction is due to gradient of local deformations in the same directions. In electronics these films can be useful for preparing of muitifunctional printed circuits of new generation.

关键词： Polymer films composites stretching anisotropy local electrical resistance magnetic susceptibility.

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Structure and magnetic behavior of a trinuclear Mn(Ⅱ)coordination complex with EDTA-ligand

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Journal of Shanghai University(English Edition) 2007年第6期11卷 556-561页

作者：刘祖黎赵爱清姚凯伦贾丽慧 Department of Physics Huazhong University of Science and Technology

A trinudear Mn（II） coordination complex Mna （HEDTA）2-10H20 （EDTA=ethylene diamine tetraacetic acid） 1 has been synthesized and characterized by X-ray crystal structure determination. In addition, IR spectrum, thermogravimetric analysis, electron paramagnetic resonance （EPR） spectra and magnetic susceptibility.of this complex are discussed. X-ray determination indicates that six- and seven-coordinate modes between Mn（Yl） and H4EDTA exist alternately in 1. Furthermore, detailed discussion of magnetic ordering in tile temperature range of 2-300 K reveals the antiferromagnetic interactions in the complex.

关键词： manganese EDTAmligand crystal structure magnetic susceptibility.

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