Rb晕带signature反转的机理

将角动量投影壳模型应用到84Rb核，对组态为πg9/2νg9/2的正宇称晕带和组态为π(p3/2,f5/2)νg9/2的负宇称晕带理论计算和实验结果进行了比较，特别是对正宇称晕带中的signature反转机理进行了探讨.角动量投影壳模型计算显示正宇称晕带中的signature反转是原子核随自旋增加形状发生变化的信号，其间原子核从低自旋的长椭球通过三轴形变变到高自旋的扁椭球.此外，还确定了此两带的原子核形状.     

On the nonlinear type singularities for semilinear Cauchy problemsSur les singularitiés de type non-linéaire pour des problèmes de Cauchy semi-linéaires

We consider the Cauchy problem for the semilinear wave equation. The Cauchy data are assumed to be conormal with respect to a point, and the source term is polynomial with respect to the solution and its first derivatives. Thanks to the study of multiplicative properties of some refined hyperbolic conormal spaces, we improve the known results about the nonlinear type singularities of the solution. To cite this article: D. Fang et al., C. R. Acad. Sci. Paris, Ser. I 335 (2002) 453–458.     

Photoinduced degradation by iron(III): removal of triphenyltin chloride from water

The photoredox process taking place in iron(III) aquacomplexes was used to cause the complete degradation of triphenyltin (TPT). TPT elimination was proved to come only from attack by hydroxyl radicals generated upon irradiation at 365 nm of Fe(H₂O)₅OH²⁺, the iron(III) species present under the experimental conditions ([Fe(III)] in the range (3–6) × 10^?4 mol l^?1). The first step is the formation of an adduct between hydroxyl radicals and the benzene ring. The main process is a stepwise dephenylation of the starting TPT. Hydroxylated phenyltin derivatives were also formed, but only as minor photoproducts. The process was shown to be efficient with artificial light as well as with solar light. Copyright © 2001 John Wiley & Sons, Ltd.     

Explosion et normes Lp pour l'équation des ondes nonlinéaire cubiqueBlow-up and Lp norms for the cubic nonlinear wave equation

We find blow-up solutions of nonlinear wave equations with cubic nonlinearity, in any number of space dimensions, and study the asymptotic behavior of their L^p norms and “energy”. The L^p norm blows up if the blow-up surface has an interior non-degenerate minimum and p?n/2. For less smooth right-hand sides, and 0<ε<1, we give examples for which the L^p norm blows up if p?n/(1+ε); their Cauchy data are unbounded, but blow-up is not instantaneous. Applications to nonlinear optics are briefly outlined. To cite this article: G. Cabart, S. Kichenassamy, C. R. Acad. Sci. Paris, Ser. I 335 (2002) 903–908.     

Phototoxicity of Some Bromine-Substituted Rhodamine Dyes: Synthesis, Photophysical Properties and Application as Photosensitizers

Abstract— The synthesis of some bromine-substituted rhodamine derivatives viz. , 4,5-dibromorhodamine methyl ester (dye 2) and 4,5-dibromorhodamine n -butyl ester (dye 3) are reported. These dyes were synthesized to promote a more efficient cancer cell photosensitizer for potential use in in vitro bone marrow purging in preparation for autologous bone marrow transplantation. Spectroscopic and photo-physical characterization of these dyes together with rhodamine 123 (dye 1) are reported in water, methanol, eth-anol and also in a microheterogeneous system, sodium dodecyl sulfate. The possible mechanism of photosensi-tization is characterized in terms of singlet oxygen efficiency of these dyes. Singlet oxygen quantum yields for bromine-substituted dyes are in the range of 0.3-0.5 depending on the solvent. For dye 1 no singlet oxygen production is found. The photodynamic actions of these dyes in different cell lines are tested. It was found that dye 2 and dye 3 are efficient photosensitizers and mediate eradication of K562, EM2, myeloid cell lines (CML) and the SMF-AI rhabdomyosarcoma line.     

Some microphysical and electrical aspects of a Cloud Resolving Model: description and thunderstorm case study

An electrification scheme, consistent with the mixed-phase microphysical parameterization, has been developed for the French cloud resolving model MésoNH. There are four successive steps: (i) charge separation is assumed to result only from non-inductive processes; (ii) electrical charges carried by the different hydrometeor species are transported along the air flow and redistributed according to the microphysical processes; (iii) the electric field is deduced from the integration of a modified Poisson equation; (iv) a lightning parameterization simulates triggering, propagation and pseudo-fractal branching of the flashes and associated charge neutralization. Two numerical experiments are conducted firstly to evaluate the performances of the lightning scheme, secondly to test the simulated evolution of the electrical characteristics of a idealized supercellular storm. To cite this article: G. Molinié et al., C. R. Physique 3 (2002) 1305–1324.     

N，N‘－双（2－水杨醛缩氨基苯基）1，3－丙二酸二酰胺与锌的显色反应研究

本文研究了新试剂 N,N′-双 (2 -水杨醛缩氨基苯基 ) 1,3-丙二酸二酰胺 (H2 Sapma)与锌的灵敏显色反应。在 p H为 7.0— 7.8的硼砂 - HCl缓冲溶液中。配合物的组成比是 Zn∶H2 Sapma=1∶ 1,配合物的最大吸收波长在 4 10 nm处 ,表观摩尔吸光系数为 1.6 9× 10 4L· mol-1· cm-1,锌量在 0— 4 0μg/2 5 m L范围内符合比耳定律。用于测定人发及强化营养盐中微量锌 ,结果令人满意。     

2-D analytic model for inductively coupled plasma sources. I.Electromagnetic model and kinetic analysis

Inductively coupled plasma sources (ICPS) have recently received increasing interest for semiconductor etching and deposition. A 2-D (r, z) electromagnetic (EM) model of ICPS is developed in terms of the mode analysis (MA) technique. Based upon the eigenmode expansion, a closed-form of the vector and scalar potentials of the EM fields is obtained, which provides exact and fast computing for the EM fields in the structure. By means of the Boltzmann-Vlasov equation, a 2-D model is established to describe the kinetic behaviors of plasmas. The closed-form solution for calculating induced space-currents is given, in which a collisionless coupled damping dominates the interaction mechanism between the induced RF wave and plasmas. In this connection, the 2-D coupled damping effect will be analyzed in detail in the following paper     

A Formality Theorem for Poisson Manifolds

Letters in Mathematical Physics - Let M be a differential manifold. Using different methods, Kontsevich and Tamarkin have proved a formality theorem, which states the existence of a Lie...