998 resultados para 382.98


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A number of parameters of biogeochemical interest were monitored along a north-southerly transect (S 43-S 63°) in the Atlantic Sector of the Southern Ocean from the 8th to the 20th of December 1997. Changes in total dissolved inorganic carbon (CT) and total alkalinity (AT) were mostly dependent on temperature and salinity until the ice edge was reached. After this point only a weak correlation was seen between these. Highest mean values of CT and AT were observed in the Winter Ice Edge (WIE) (2195 and 2319 µmol/kg, respectively). Lowest mean AT (2277 µmol/kg) was observed in the Sub-Antarctic Front (SAF), whereas lowest mean CT concentration (2068 µmol/kg) was associated with the Sub-Tropical Front (STF). The pH in situ varied between 8.060 and 8.156 where the highest values were observed in the southern part of the Antarctic Polar Front (APF) and in the Summer Ice Edge (SIE) Region . These peaks were associated with areas of high chlorophyll a (chl a) and tribromomethane values. In the other areas the pH in situ was mainly dependent on hydrography. Bacterial abundance decreased more than one order of magnitude when going from north to south. The decrease appeared to be strongly related to water temperature and there were no elevated abundances at frontal zones. Microphytoplankton dominated in the SAF and APF, whereas the nano- and picoplankton dominated outside these regions. Volatile halogenated compounds were found to vary both with regions, and with daylight. For the iodinated compounds, the highest concentrations were found north of the STF. Brominated hydrocarbons had high concentrations in the STF, but elevated concentrations were also found in the APF and SIE regions. No obvious correlation could be found between the occurrence of individual halocarbons and chl a. On some occasions trichloroethene and tribromomethane related to the presence of nano- and microplankton, respectively.

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Con el 'Desastre' del 98, la reacción antiimperialista del Modernismo implicó una revisión de sus afiliaciones culturales. Como se sabe, han sido frecuentes las críticas al hispanismo y al latinismo desplegados en la escritura modernista en tanto síntomas de un persistente 'colonialismo'. Este trabajo analiza las relaciones establecidas entre los escritores latinoamericanos y españoles a partir de la Derrota del 98 -las cuales eran promovidas a su vez por el Hispanismo peninsular desde los festejos del IV Centenario en 1892- y el modo en que los Modernistas piensan los lazos con España ante una situación que confirmaba la hegemonía sajona y la 'decadencia latina'. En este contexto la lectura 'antiimperialista' de La Tempestad de Shakespeare ('El triunfo de Calibán' de Darío, el Ariel de Rodó) se transforma en un poderoso fenómeno de religación en torno del cual se debaten las relaciones con la ex-Madre Patria. Para los modernistas, según nuestra lectura, la unión con la intelectualidad hispana implicaba el fortalecimiento de un sistema literario común en el mercado internacionalizado de la letras. En tal sistema, resultaba evidente hacia el fin de siglo el liderazgo de Darío y la posibilidad de que los latinoamericanos compititieran con los españoles en pie de igualdad

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Fil: Garatte, Luciana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

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Fil: Bogdan, Guillermina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Fil: Ennis, Juan Antonio. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

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Fil: Buisel, María Delia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.