971 resultados para Espanya-Història-218 a.C.-414 d.C. (Època romana)


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Sign. : []2, [calderón]-6[calderón]2, 7[calderón], a-q4, A-Z4, 2A-2Z4, 3A4, 3B2

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Revisió de la Història de la llengua catalana, manuscrit d’Antoni de Bastero, degut a l’aparició d’un segon volum manuscrit del mateix Bastero que completa el primer però que no varia substancialment les conclusions a les que es van arribar fruit de l’estudi del primer manuscrit. Es relaciona també un inventari dels papers que es conserven del canonge Bastero

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Resumen de la autora en catalán

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Sota els auspicis de la col·lecció Es Frares, l'Ajuntament de Lloret de Mar vol recopilar i salvaguardar els testimonis de la història de la vila amb la intenció de fer arribar aquest patrimoni cultural construit al llarg de generacions a la seva població. Prova d'aquest interés són les anteriors publicacions com "La bòbila romana de Fenals (Lloret de Mar)" o el que es presenta en aquesta ocasió, El fons municipal en pergamí de l'angiga universitat de Lloret de Mar

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Disponible el vídeo en beta

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Resumen basado en el de la publicaci??n

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Colofón

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Sign. : []2, [calderón]-4[calderón]2, 5[calderón], A-Z4, 2A-2Z4, 3A-3Z4

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The objective of this research was the preparation of a silsesquioxane functionalized with eight chloropropyl chains (T8-PrCl) and of a new derivative functionalized with a pendant linear chain (2-amino-1,3,4-thiadiazole - ATD; T8-Pr-ATD). The two nanostructured materials were characterized by 13C and 29Si NMR, FTIR and elemental analysis. The new nanostructured material, octakis[3-(2-amino-1,3,4-thiadiazole)propyl] octasilsesquioxane (T8-Pr-ATD), was tested as a ligand for transition-metal ions with a special attention to adsorption isotherms. The adsorption was performed using a batchwise process and the organofunctionalized surface showed the ability to adsorb the metal ions Cu (II), Co (II), and Ni (II) from water and ethanol. The adsorption isotherms were fitted by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) model. The kinetics of adsorption of metals were performed using three models such as pseudo-first order, pseudo-second order and Elovich. The Langmuir and Elovich models were the most appropriate to describe the adsorption and kinetic data, respectively. Furthermore, the T8-Pr-ATD was successfully applied to the analysis of environmental samples (river and sea water). Subsequently, a new nanomaterial was prepared by functionalization of the T8-Pr-ATD with a Mo (II) organometallic complex (T8-Pr-ATD-Mo). Only a few works in the literature have reported this type of substitution, and none dealt with ATD and Mo (II) complexes. The new Mo-silsesquioxane organometallic nanomaterial was tested as precursor in the epoxidation of cyclooctene and styrene. © 2012 Elsevier B.V.