1000 resultados para 372.218


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Fil: Giménez, Gabriela. Universidad Nacional de Cuyo. Facultad de Ciencias Políticas y Sociales

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Fil: Costarelli Brandi, Hugo Emilio. Universidad Nacional de Cuyo. Facultad de Filosofía y Letras

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Fil: Pró, Diego F..

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The Br/Cl, Li/Cl and B/Cl ratios and boron isotope compositions of hypersaline pore fluids from DSDP Sites 372 and 374 were measured in an attempt to evaluate the origin of the brines. In Site 374 the relationships between the Cl concentrations (up to 5000 mM) and Br/Cl (~0.012), Na/Cl (as low as 0.1), B/Cl (0.0025), and d11B values (43-55?) of the deep pore water between 380 and 405 mbsf, located within the Messinian sediments, reflect remnants of ~65-fold evaporated sea water. The original evaporated sea water was modified by: (1) dilution with overlying or less saline water by about 30%; and (2) slight dissolution of NaCl evaporites. The variations in d11B show a continuous increase in d11B values with depth in Site 374, up to 66.7? at a depth of 300 mbsf (Upper Pliocene marl sediments). The conspicuous 11B enrichment trend is consistent with elemental boron depletion, which was calculated from the expected boron concentrations of evaporated sea water with corresponding Br/Cl and Na/Cl ratios. Li/Cl variations also show a depletion of Li relative to evaporated sea water. The apparent depletions of B and Li, as well as the 11B enrichment, reflect uptake of these elements by clay minerals at low water/sediment ratios.

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Fil: Legarralde, Martín Roberto. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

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Od. 17.218 constituye el registro más antiguo del proverbio griego sobre a´Çünidad entre semejantes, recordado numerosas veces y bajo gran variedad de enunciados en la tradición paremiográ´Çü ca griega. Este artículo propone un estudio de dicho proverbio, que se inicia con una revisión del antiguo concepto de paroimía, con especial referencia a su vinculación con el concepto de gnome. A continuación se analiza el sentido del proverbio homérico y los rasgos inherentes a su inserción en el texto de Odisea. Por último, se examina la proyección del proverbio en autores griegos y en las colecciones del Corpus Paroemiographorum Graecorum.