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Study on Separation of Lanthanum from Praseodymium Complexes with IMDA by Gel and Macroporous Anion exchangers

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Journal of Rare earths 2000年第2期18卷 90-96页

作者： Halina Hubicka, Dorota Drobek (Department of Inorganic Chemistry, Faculty of Chemistry,Maria curie.Sklodowska University, Maria curie.Sklodowska Sq. 3, 20-031 Lublin, Poland ) Department of Inorganic Chemistry Faculty of Chemistry Maria Curie - Sklodowska University Maria Curie - Sklodowska Sq. 3 20-031 Lublin Poland

During our studies on separation of rare earth complexes with aminopolycarboxylic acids on anion-exchangers, it is found that the affinity series of these elements with IMDA (Ln 3+ ∶IMDA=1∶2) for the anion-exchanger Dowex 1 in the acetate and IMDA forms is non-typical: Dy 3+ > Ho 3+ > Gd 3+ >eu 3+ >er 3+ >Y 3+ >Sm 3+ >Tm 3+ >Nd 3+ >Pr 3+ >>La 3+ . In the affinity series La 3+ is characterised as the lowest affinity in comparison with other rare earth elements, which indicates possibility of purification of La 3+ from all remaining lanthanides as well as Pr 3+ in the macro-micro systems by the frontal analysis technique. In the investigations strongly basic gel anion-exchangers Dowex 1×8 (type 1) and Dowex 2×8 (type 2) and strongly basic and weakly basic macroporous anion-exchangers Dowex MSA-1 and Dowex MWA 1 were used. Macroporous ion-exchangers have a sponge-like matrix which contains pores larger than molecules in size and the exchange of large ions is faster. The studies indicate that both the gel and macroporous anion-exchangers are useful for purification of La 3+ from Pr 3+ complexes with iminodiacetic acid.

关键词： rare earths lanthanum praseodymium anion-exchange iminodiacetic acid

Investigation on the Use of the Weakly Basic Polyacrylate Anion-exchanger Amberlite IRA-68 for Sorption and Separation of Iminodiacetate Complexes of Rare earth elements

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Journal of Rare earths 2002年第6期20卷 611-618页

作者： Halina Hubicka , Dorota Kolodynska (Department of Inorganic Chemistry, Faculty of Chemistry, Maria curie.Sklodowska University, Maria curie.Sklodowska Sq.3, 20-031 Lublin, Poland) Dept. of Inorg. Chem. Faculty of Chem. Maria Curie-Sklodowska Univ. Maria Curie-Sklodowska Sq.3 20-031 Lubin Poland

Based on the determined affinity series of rare earth element complexes with IMDA for the anion-exchangers, purification of macroquantities of Nd 3+ from Y 3+, Sm 3+ from Ho 3+, La 3+ from Nd 3+ and La 3+ from Pr 3+ on the weakly basic gel anion-exchanger Amberlite IRA-68 was studied. Using the presented method on 1 L of Amberlite IRA-68 in the acetate form, it is possible to obtain about 240 g Nd 2O 3 purified from Y 2O 3. Great difference in affinity of La 3+ and Nd 3+ as well as Pr 3+ complexes for this anion-exchanger in the acetate form indicates the possibility of applying this process for purification of lanthanum on the increased scale. On 1 L of Amberilte IRA-68 in the acetate form it is possible to obtain about 1125 g La 2O 3 purified from Nd 2O 3. On the basis of these results it can be assumed that unique properties of polyacrylate anion-exchangers enable their application for separation of rare earth elements.

关键词： rare earths polyacrylate anion-exchangers iminodiacetic acid

eXISTeNCe OF MINIMIZING SOLUTIONSAROUND“eXTeNDeD STATeS”FOR A NONLINeARLY eLASTICCLAMPeD PLANe MeMBRANe

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Chinese Annals of Mathematics,Series B 1999年第3期20卷 279-296页

作者： D. COUTAND(University of Pierre et Marie curie. Laboratoire d’Analyse Numerique, 4, Place Jussieu, 75005 Paris,France. e-mail: coutand@ann.jussieu.fr) Université of Pierre et Marie curie Laboratoire d'Analyse Numérique 4 Place Jussieu 75005 Paris France

The formal asymptotic analysis of D. Fox, A. Raoult & J.C. Simo[10] has justified the twodimensional nonlinear "membrane" equations for a plate made of a Saint Venant-Kirchhoff *** model, which retains the material-frame indifference of the original three dimensional problem in the sense that its energy density is invariant under the rotations of R3, is equivalent to finding the critical points of a functional whose nonlinear part depends on the first fundamental form of the unknown deformed *** author establishes here, by the inverse function theorem, the existence of an injective solution to the clamped membrane problem around particular forces corresponding physically to an "extension" of the membrane. Furthermore, it is proved that the solution found in this fashion is also the unique minimizer to the nonlinear membrane functional, which is not sequentially weakly lower semi-continuous.

关键词： Minimizing solution Nonlinearly elastic clamped plane membrane Injective Solution

ASYMPTOTIC ANALYSIS OF SHeLLS VIA г-CONVeRGeNCe

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Journal of Computational Mathematics 2000年第4期18卷 337-352页

作者： Karine Genevey (Laboratoire D’Analyse Numerique, Tour 55, Universite Pierre et Marie curie. 4 place Jussieu, 75005 Paris, France) Universite Pierre et Marie curie 法国 Paris 75005

We give a new justification of the linear membrane and flexural shell models. We prove that the sequence of scaled energy functionals associated with the scaled problem r-converges to the energy functional associated with a two-dimensional model. This two-dimensional model is a membrane or flexural one, depending on the geometric and kinematic conditions. Then, a classical argument allows to give a new proof of the convergence theorems recently obtained by P.G. Ciarlet, V. Lods and B. Miara.

关键词： г-converges linear elastic shell

ASYMPTOTIC ANALYSIS OF LINeARLY eLASTIC SHALLOW SHeLLS WITH VARIABLe THICKNeSS

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Chinese Annals of Mathematics,Series B 2001年第4期22卷 405-416页

作者： N. SABU Laboratoire d’Analyse Numerique, Universite Pierre et Marie curie. 4 Place Jussieu, 75005, Paris, France.e-mail: sabu@ann.jussieu.fr Laboratoire d'Analyse Numerique Université Pierre et Marie Curie 4 Place Jussieu 75005 Paris France

The author considers a linearly elastic shallow shell with variable thickness and shows that, as the thickness of the shell goes to zero, the solution of the three-dimensional equations converges to the solution of th... 详细信息

关键词： Asymptotic analysis elastic shallow shells Vaiable thickness

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THIS I BeLIeVe

疯狂英语（初中天地） 2003年第28期 4-5页

作者： Marie curie Joseph

Life is not easy for any man or woman. We must have perseverance and, above all, confidence in ourselves. We must believe that we are gifted for something and that this thing, whatever the cost, must be attained. What... 详细信息

关键词： THIS I BeLIeVe

Investigation of Polyacrylate Anion-exchangers for Separation of Rare earth element Complexes with eDTA

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Journal of Rare earths 2002年第1期20卷 31-35页

作者： Halina Hubicka(Department of Inorganic Chemistry, Faculty of Chemistry, Maria curie.Sklodowska University, 20 031 Lublin, Poland) Marie curie.Sklodowska Univ Fac Chem Dept Inorgan Chem PL-20031 Lublin Poland

The rare earth complexes with eDTA, Ln(edta), show an unusual sequence of affinity for the anion exchangers. The sorption and chromatographic separation of Y 3+ for Nd 3+ complexes with eDTA was studied by using the strongly basic gel and macroporous polyacrylate anion exchangers, Amberlite IRA 458 and Amberlite 958, and the weakly basic gel polyacrylate anion exchanger, Amberlite IRA 68. The investigations on sorption and separation of rare earth complexes with eDTA on the polyacrylate anion exchangers applied mainly in the environment protection so far indicate that they can be applied in anionexchange separation of lanthanide complexes with aminopolycarboxylic acids. It was shown that the weakly basic polyacrylate gel anion exchanger Amberlite IRA 68 is the most effective in purification of Y 3+ from Nd 3+ in comparison with the strongly basic anion exchangers of this type.

关键词： rare earths yttrium neodymium anion exchanger eDTA

miniScidOM: a scintillator-based tomograph for volumetric dose reconstruction of single laser-driven proton bunches

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High Power Laser Science and engineering 2024年第2期12卷 41-50页

作者： A.Corvino M.Reimold e.Beyreuther F.-e.Brack F.Kroll J.Pawelke J.D.Schilz M.Schneider U.Schramm M.e.P.Umlandt K.Zeil T.Ziegler J.Metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany OncoRay–National Center for Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current affiliation:Institut curie UniversitéPSLCNRS UMR3347OrsayFrance Current affiliation:Universitätsklinikum Freiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of intense and short proton bunches on a micrometre scale,thus offering new experimental capabilities to research fields such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow for tailored volumetric dose deposition in a sample via single bunches to excite or probe specific sample *** rising number of such experiments indicates a need for diagnostics providing spatially resolved characterization of dose distributions with volumes of approximately 1 cm^(3) for single proton bunches to allow for fast online *** we present the scintillator-based miniScidOM detector for online single-bunch tomographic reconstruction of dose distributions in volumes of up to approximately 1 cm^(3).The detector achieves a spatial resolution below 500μm and a sensitivity of 100 *** detector performance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary focus is the characterization of the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate

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