992 resultados para Demóstenes, ca. 384-322 a.C
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Hojas imp. por ambas caras
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a5r y b1r imp. a dos tintas
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Capitulares grab. xil.
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Sign.: a8, b6, c8, d6, e8, f6, g8, h6, i8, k6, l8, m6, n8, o6, p8, q6, r8, s6, t8, u6, x8, y6, z8, A6, B8, C6, D8, E6, F8, G6, H8, I6, K8, L6, M8, N6, O8, P6, Q8, R6, S8, T6, U8, X6, Y8, Z6, 2A8, 2B6, 2C8, 2D-2F6
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Sign.: []1, *2, A-K2, L1
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Se ha respetado la puntuación original
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Resumen: Descripción: retrato de busto de César basado en una escultura
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Inscripción en el lateral derecho: "Magnit Gemmae"
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Resumen: Descripción: retrato de busto de Julio César basado en una escultura
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Resumen: Descripción: retrato de perfil hacia la izquierda insertado en un medallón ovalado
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Copia digital: Biblioteca Valenciana, 2011
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Ternary molybdates and tungstates ABO4 (A=Ca, Pb and B= Mo, W) are a group of materials that could be used for a variety of optoelectronic applications. We present a study of the optoelectronic properties based on first-principles using several orbitaldependent one-electron potentials applied to several orbital subspaces. The optical properties are split into chemical-species contributions in order to quantify the microscopic contributions. Furthermore, the effect of using several one-electron potentials and orbital subspaces is analyzed. From the results, the larger contribution to the optical absorption comes from the B-O transitions. The possible use as multi-gap solar cell absorbents is analyzed.
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The aa3 type cytochrome c oxidase consisting of the core subunits I and II only was isolated from the soil bacterium Paracoccus denitrificans and crystallized as complex with a monoclonal antibody Fv fragment. Crystals could be grown in the presence of a number of different nonionic detergents. However, only undecyl-β-d-maltoside and cyclohexyl-hexyl-β-d-maltoside yielded well-ordered crystals suitable for high resolution x-ray crystallographic studies. The crystals belong to space group P212121 and diffract x-rays to at least 2.5 Å (1 Å = 0.1 nm) resolution using synchrotron radiation. The structure was determined to a resolution of 2.7 Å using molecular replacement and refined to a crystallographic R-factor of 20.5% (Rfree = 25.9%). The refined model includes subunits I and II and the 2 chains of the Fv fragment, 2 heme A molecules, 3 copper atoms, and 1 Mg/Mn atom, a new metal (Ca) binding site, 52 tentatively identified water molecules, and 9 detergent molecules. Only four of the water molecules are located in the cytoplasmic half of cytochrome c oxidase. Most of them are near the interface of subunits I and II. Several waters form a hydrogen-bonded cluster, including the heme propionates and the Mg/Mn binding site. The Fv fragment binds to the periplasmic polar domain of subunit II and is critically involved in the formation of the crystal lattice. The crystallization procedure is well reproducible and will allow for the analysis of the structures of mechanistically interesting mutant cytochrome c oxidases.