Добірка наукової літератури з теми "Nucléation cristalline"
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Статті в журналах з теми "Nucléation cristalline"
Jourani, A., and T. Bounahmidi. "Cinétique de nucléation hétérogène et de croissance cristalline de l’hydroxyapatite lors de la précipitation spontanée des phosphates de calcium dans des solutions sucrées." Chemical Engineering Journal 89, no. 1-3 (October 2002): 185–92. http://dx.doi.org/10.1016/s1385-8947(02)00028-1.
Повний текст джерелаДисертації з теми "Nucléation cristalline"
Roskosz, Mathieu. "Nucléation et croissance cristalline dans les silicates liquides." Vandoeuvre-les-Nancy, INPL, 2004. http://www.theses.fr/2004INPL040N.
Повний текст джерелаMicroscopic mechanisms controling crystal nucieation and growth at temperatures below the solidus 1 but above Tg have been studied on glasses in the system CaO-AlzO3-SiOz. Experimental charges have been characterized over a wide range of length scaIes (SEM, TEM, Microprobe, DRX, raman spectroscopy). Minerais are enriched in Ca and have Si/Al approaching that of the parent liquid. A gradual change of Al/Si is observed with temperature. These results are explained by the relative mobilities of the different cations, of which Ca is several orders of magnitude faster than that of Si and Al. . The link between crystal growth and viscosity has been tested and explained by the common microscopic origine of these processes which is the breaking and formation of Si-O bonds. This link is broken when Al/Si of crystals and liquids are different, because the coupled diffusion of Al and Ca becomes the limiting factor of the crystal growth
Kohl, Michael. "Étude de l'ensemencement d'un cristallisoir de chimie fine." Lyon 1, 2000. http://www.theses.fr/2000LYO10072.
Повний текст джерелаPalumbo, Valérie. "Phénomènes de nucléation et de croissance cristalline dans les milieux de viscosité élevée : application à la cristallisation des deux formes stable et métastable du monohydrate de monométhylhydrazine." Lyon 1, 1995. http://www.theses.fr/1995LYO10199.
Повний текст джерелаSkalli, Mohamed Khalid. "Etude théorique des transformations des assemblages cristallins par nucléation dans le cas du para-dichlorobenzène." Lyon 1, 1992. http://www.theses.fr/1992LYO10189.
Повний текст джерелаBeilles, Stéphane. "Contribution à l'étude de la nucléation et de la croissance cristalline en solution. Application à la mise au point de procédés de séparation de composés moléculaires : le S9490_03 et les énantiomères de la 5-éthyl-5-méthylhydantoïne." Rouen, 2000. http://www.theses.fr/2000ROUES064.
Повний текст джерелаMeunier, Muriel. "Etude, par diffraction d'atomes d'hélium, des premiers stades de la croissance d'agrégats de palladium sur une surface (100) d'oxyde de magnésium." Aix-Marseille 3, 1995. http://www.theses.fr/1995AIX30062.
Повний текст джерелаParmentier, Delphine. "Étude cinétique de la nucléation primaire et de la croissance cristalline au cours de la coprécipitation de solutions solides d’oxalates d’actinides." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0425.
Повний текст джерелаCurrent concepts for future nuclear systems aim at improving the fuel cycle with the co management of actinides in order to enhance the fuel performance and to reduce the proliferation risk. Actinides coconversion processes play an important role by producing mixed actinides compounds used as starting materials for fuel re-fabrication. Oxalic coprecipitation is one investigated way to synthesize solid solutions of actinides – lanthanides mixed oxalates which have to meet strict standards. The nucleation and growth kinetic laws involve a fundamental crystallization parameter such as the supersaturation. For the precipitation of solid solutions, different theories are developed in the literature, however none have been verified experimentally. A new suitable expression for the supersaturation ratio applicable is presented in order to determine a general model for the expression of nucleation and growth rates. The experimental study of the primary nucleation kinetics is based on a “stopped flow” apparatus which provides a very good micromixing of the reactants. The kinetic laws of solid solutions verify the theory of Volmer and Weber applied to the coprecipitation. The method of calculating the supersaturation developed allows to find the typical behavior of nucleation. The experimental results demonstrate that the coprecipitation of the solid solution is kinetically favored over the precipitation of simple oxalates due to a lower energy barrier for the solid solution. The crystal growth rate is determined from a spectrophotometric monitoring of the reactant concentrations using a seed charge. The crystal growth is controlled by the surface integration with a spiral mechanism
Taleb, Majid. "Cristallogenèse sous contraintes physiques : effet d'un champ électrique externe sur les solutions protéiques et leurs cristallisations." Nancy 1, 1999. http://www.theses.fr/1999NAN10273.
Повний текст джерелаThis work deals with the solubility and crystallization properties of proteins and their behavior in solution under an external electric field. Our protein model is a hen egg-white lysozyme. The aim was to investigate how an external electric field can influence the nucleation, growth and solubility of lysozyme in solutions of various physico-chemical natures. The resulting diagrams have permitted to analyze the effect of the electric field on the solubility and the crystallization kinetics of lysozyme. This was used to propose a new ways to improve the crystal growth and new insights about how an external electric field can be rationally used to control effectively the protein crystal nuckleation. This result was confirmed by modeling calculations. Finally, our approach permits to obtain big crystals suitable for neutron diffraction experiments
Courvoisier, Laurent. "Polymorphisme et cristallisation préférentielle : applications aux dérivés(+-)5-méthyl-5-aryl-imidazolidine 2,4-dione et au (+-)(2-(diphénylméthyl)sulfinyl)acétamide." Rouen, 2003. http://www.theses.fr/2003ROUES020.
Повний текст джерелаResolution of 5-methyl-5-aryl-imidazolidine-2,4-dione derivatives by means of the AS3PC (Auto-Seeded Programmed Polythermic Preferential crystallization) and SIPC (Seeded Isothermal Preferential Crystallization) has been carried out at 2L scale. The inline analysis of the particles in suspension during the crystallization shows that the entrainment effect does not proceed via a unique mechanism. The effect of the polymorphic form of the seeds on the two processes has been examined. (+-)(2-(diphénylméthyl)sulfinyl)-N-acétamide crystallizes in five crystalline forms and four solvates. Each of the new phase is accessible via a specific process and characterized
Oullion, Mathieu. "Étude de la cristallisation discontinue par spectroscopie ATR-FTIR in-situ, analyse d'image et modélisation par bilan de population bidimensionnel : application à la vanilline." Lyon 1, 2005. http://www.theses.fr/2005LYO1A077.
Повний текст джерелаЧастини книг з теми "Nucléation cristalline"
"12. La spectrométrie Raman : un outil de choix pour l’étude des mécanismes de nucléation et de croissance cristalline." In Du verre au cristal, 283–310. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1064-2-018.
Повний текст джерела"12. La spectrométrie Raman : un outil de choix pour l’étude des mécanismes de nucléation et de croissance cristalline." In Du verre au cristal, 283–310. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1064-2.c018.
Повний текст джерела