997 resultados para 1856-1858.


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t. I. 1831-1841.--[t. II.] 1842-1846.--t. III. 1847-1851.--t. IV. 1852-1853.--t. V. 1854-1856.--t. VI. 1857-1858.--[t. VII] 1859.--[t. VIII] 1860.--[t. IX] 1861.

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Mode of access: Internet.

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Extracted from Memorie della R. Accademia delle scienze di Torino. Classe di scienze fisiche, matematiche e naturali. Serie 2da, tomo XVII.

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Approaches to quantify the organic carbon accumulation on a global scale generally do not consider the small-scale variability of sedimentary and oceanographic boundary conditions along continental margins. In this study, we present a new approach to regionalize the total organic carbon (TOC) content in surface sediments (<5 cm sediment depth). It is based on a compilation of more than 5500 single measurements from various sources. Global TOC distribution was determined by the application of a combined qualitative and quantitative-geostatistical method. Overall, 33 benthic TOC-based provinces were defined and used to process the global distribution pattern of the TOC content in surface sediments in a 1°x1° grid resolution. Regional dependencies of data points within each single province are expressed by modeled semi-variograms. Measured and estimated TOC values show good correlation, emphasizing the reasonable applicability of the method. The accumulation of organic carbon in marine surface sediments is a key parameter in the control of mineralization processes and the material exchange between the sediment and the ocean water. Our approach will help to improve global budgets of nutrient and carbon cycles.

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En este artículo se estudia una obra atribuida a Sófocles titulada Κρῆτες (Los cretenses), una tragedia sólo conocida por dos dudosos testimonios de Hesiquio y Ateneo de Náucratis. A finales del siglo xviii una nueva lectura de ambos los adscribía a otra tragedia, con lo que se negaba la existencia de Κρῆτες. A pesar de esto, este título se sigue manteniendo en las ediciones de la obra sofoclea, ahora relacionado con nuevos hallazgos de fragmentos papiráceos del autor. Nuestro objetivo es el de analizar los testimonios en profundidad para concluir si la obra pudo o no haberse escrito.

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Notas críticas y exegéticas sobre el capítulo 166 (Antonio Diógenes, Las maravillas de más allá de Tule) de la Biblioteca de Focio.