Study on Preparation and Property of Poly－Aminosilicone－Rare Earth Composite

The poly-aminosilicone-rare earth composite was prepared by poly-aminosilicone cross-linked with rare earth and active silanol. The thermal stability of the composites was studied by thermogravimetric analysis (TG). Force condition of the composites in electric field was analyzed and relative polarizability was derived. It is found that the composites containing different rare earth ions have different relative polarizability. The experiment results reveal that organosilicon materials with different electrical performance can be obtained by this way. Meanwhile, the absorption and flourescene spectrum of composites were also investigated. Compared to rare earth chloride, the spectrum properties of the composite are changed obviously. The possible reasons for these phenomena were discussed.     

Bioeffects of Rare Earth Complex on Rats Studied by NMR and ICP-MS Spectroscopy

Thedevelopmentofhigh fieldNMRspectrome terswithincreasedsensitivity,resolution,dynamic rangeandimprovedcomputingcapabilitieshasmade itpossibletouseNMRtechniqueforrapidmulticom ponentanalysisoflowMWcompoundsinbiofluids inordertoassessthetoxicologicaleffe…     

Study on Preparation and Properties of PVC Film Modified by Rare Earth

The transparent PVC films were prepared by tape casting. In the process of preparation, rare earth nitrate, as a kind of modifier, was added to the solution of PVC and THF. These PVC films were tested after being crosslinked by ultraviolet light. It is found that the mechanical and physical properties of all the PVC films modified by rare earth nitrate are greatly enhanced.     

Study on the Crystal Structure and the Intrinsic Properties of Ternary Rare Earth Compound TbMn6Sn6

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Report on Rare Earth Market Evolution and Involvement of Rhone－Poulenc in the Market

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A Quantum Chemical Study on Hexanuclear Cluster Halides of Rare Earth Elements and Their Interstitial Compounds

The electronic structures of rare earth cluster halides R(R_6X_(12)) and their interstitial compounds R_7X_(12)Zwere studied by the DV-X_(?) method (R=Sc,Y,Pr,Gd or Er;X=Cl,Br or I;Z=B,C,N,Fe,Co or Ru).Theresults show that because f electrons in empty rare earth cluster are screened,their orbitals are more difficult tooverlap each other,a deficiency of skeleton orbitals in cluster causing the system to be unstable.They are easilycondensed into chain compound R_2X_3 or R_5X_8.If a light atom of main group is embedded into octahedralcluster,bonding orbitals formed from interstitial atom and rare earth cluster strengthen clusterskeleton bond in the system to reach structural stability.If embedded atom belongs to transition metal,bondingorbitals composed of that of interstitial atom and rare earth cluster take the place of original cluster skeletonorbitals to form heteronuclear metal cluster (or double-coordination compound).     

Studies on the Magnetic Properties of Rare Earth Ions and Binuclear Complexes by ~1H NMR Single Spectrometer

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Study on the influence of La_2O_3 on Stress in α－Al_2O_3 Scale by a Novel Two－side Oxidation Bending Method

ＭａＸｉｎ－Ｑｉｎｇ；（马信清）；ＬｉＭｅｉ－Ｓｈｕａｎ；（李美栓）；ＬｉＴｉｅ－Ｆａｎ；（李铁藩）（ＩｎｓｔｉｔｕｌｅｏｆＣｏｒｒｏｓｉｏｎａｎｄＰｒｏｔｅｃｔｉｏｎｏｆＭｅｔａｌｓ，ＣｏｒｒｏｓｉｏｎＳｃｉｅｎｃｅＬａｂｏｒａｔｏｒｙ，Ａｃａｄｅ...     

The Aqueous and Surface Chemistry of Activation in the Flotation of Sulphide Minerals—A Review. Part I: An Electrochemical Model

The activation of sulphide minerals by heavy metal ions in acidic pH solutions has been reviewed from an electrochemical point of view. It is shown that the well-documented ion-exchange model is oversimplified. Surface oxidation of the mineral and reduction of the activator metal ions occur during the activation processes. Activation in an oxygen-deficient system leads to the formation of a sulphur-rich surface and results in activation-induced flotation. The overall process of activation is controlled by a mixed-potential mechanism.     

Inhibition of Rare Earth Chlorinate on Ni_(2)O_(3)-Induced DNA Strand Breakage and Effect on Oxy-Radicals

Inhibition of RECl3 onNi2O3-induced DNA breakage ofhuman embryo lung cell (HEL)and reduced content of negativesuperoxidative ion (O2) inguinea alveolar macrophage (AM )was observed by means of singlecell gel electrophoresis assay(comet assay) and cytochrome Cassay respectively. Incubated with2×10 cell/ml human embryolung cell for 1 h at 37℃, 20μg.ml-1 of Ni2O3 could obviously induce DNA strand breakage compared with the control (P<0.01). Add 10 μg.ml-1 CeCl3 or10μg RECl3 with 20…     

稀土杂多配合物K15[Ce (BW11O39)2]·17H2O与BSA的相互作用

利用紫外光谱,以曙红Y(Eosin Y)为探针,考察了稀土杂多配合物K15[Ce(BW11O39)2]·17H2O与牛血清白蛋白(BSA)间的作用,K15[Ce(BW11O39)2]·17H2O与Eosin Y在BSA上有竞争结合,表面活性剂对两者间的竞争结合有增敏作用;并利用荧光光谱直接考察了K15[Ce(BW11O39)2]·17H2O与BSA的相互作用及其对BSA构象的影响.