Nicolas Dalayrac, Kniestück, beim Komponieren

Signatur des Originals: S 36/G03991

Étienne Nicolas Mehul, Brustbild

Signatur des Originals: S 36/G04217

Étienne Nicolas Mehul, Brustbild

Signatur des Originals: S 36/G04218

Étienne Nicolas Mehul, Brustbild, Profil

Signatur des Originals: S 36/G04219

Étienne Nicolas Mehul, Brustbild

Signatur des Originals: S 36/G04220

Claude Joseph Rouget de Lisle, Brustbild, Profil, Medaillon

Signatur des Originals: S 36/G04356

La situation légale des Israélites en Russie : Tome Premier ; Du règne du Czar Alexis Michaĭlovitch au règne du Czar Nicolas Ier ; Traduit du russe

par Nicolas de Gradowsky

A global seasonal surface ocean climatology of phytoplankton types based on CHEMTAX analysis of HPLC pigments

Much advancement has been made in recent years in field data assimilation, remote sensing and ecosystem modeling, yet our global view of phytoplankton biogeography beyond chlorophyll biomass is still a cursory taxonomic picture with vast areas of the open ocean requiring field validations. High performance liquid chromatography (HPLC) pigment data combined with inverse methods offer an advantage over many other phytoplankton quantification measures by way of providing an immediate perspective of the whole phytoplankton community in a sample as a function of chlorophyll biomass. Historically, such chemotaxonomic analysis has been conducted mainly at local spatial and temporal scales in the ocean. Here, we apply a widely tested inverse approach, CHEMTAX, to a global climatology of pigment observations from HPLC. This study marks the first systematic and objective global application of CHEMTAX, yielding a seasonal climatology comprised of ~1500 1°x1° global grid points of the major phytoplankton pigment types in the ocean characterizing cyanobacteria, haptophytes, chlorophytes, cryptophytes, dinoflagellates, and diatoms, with results validated against prior regional studies where possible. Key findings from this new global view of specific phytoplankton abundances from pigments are a) the large global proportion of marine haptophytes (comprising 32 ± 5% of total chlorophyll), whose biogeochemical functional roles are relatively unknown, and b) the contrasting spatial scales of complexity in global community structure that can be explained in part by regional oceanographic conditions. These publicly accessible results will guide future parameterizations of marine ecosystem models exploring the link between phytoplankton community structure and marine biogeochemical cycles.

Raban Maur – Claude de Turin, Deux commentaires sur le libre de Ruth. Introduction, traduction, notes et index par P. Monat (Sources Chrétiennes 533), Les Éditions du Cerf, Paris, 2009; 190 pp. ISBN 978-2-204-09181-7.

Fil: Peretó Rivas, Rubén.

Radiocarbon ages, carbon and oxygen isotopes and Mg/Ca and Sr/Ca ratios of Globigerinoides in sediment core MD99-2203, Cape Hatteras

This study presents high-resolution foraminiferal-based sea surface temperature, sea surface salinity and upper water column stratification reconstructions off Cape Hatteras, a region sensitive to atmospheric and thermohaline circulation changes associated with the Gulf Stream. We focus on the last 10,000 years (10 ka) to study the surface hydrology changes under our current climate conditions and discuss the centennial to millennial time scale variability. We observed opposite evolutions between the conditions off Cape Hatteras and those south of Iceland, known today for the North Atlantic Oscillation pattern. We interpret the temperature and salinity changes in both regions as co-variation of activities of the subtropical and subpolar gyres. Around 8.3 ka and 5.2-3.5 ka, positive salinity anomalies are reconstructed off Cape Hatteras. We demonstrate, for the 5.2-3.5 ka period, that the salinity increase was caused by the cessation of the low salinity surface flow coming from the north. A northward displacement of the Gulf Stream, blocking the southbound low-salinity flow, concomitant to a reduced Meridional Overturning Circulation is the most likely scenario. Finally, wavelet transform analysis revealed a 1000-year period pacing the d18O signal over the early Holocene. This 1000-year frequency band is significantly coherent with the 1000-year frequency band of Total Solar Irradiance (TSI) between 9.5 ka and 7 ka and both signals are in phase over the rest of the studied period.

La sociología como razonamiento histórico-comparativo : Reseña de : Jean-Claude Passeron, El razonamiento sociológico. El espacio comparativo de las pruebas históricas, Madrid: Siglo XXI, 2011

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

Poétiques Comparées des Mythes. De l´Antiquité à la Modernité. En Hommage à Claude Calame, de Ute Heidmann (dir.)

Fil: Zecchin de Fasano, Graciela Cristina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Claude Calame. Prométhée généticien: Profits techniques et usages de métaphores. Editions Les Belles Lettres- Encre Marine, Paris, 2010, 204 pp. (Collection A présent)

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

El esfuerzo de restituir la pluralidad del fenómeno comunista a través de la búsqueda colectiva. Reseña del libro Le siécle des communismes, bajo la dirección de Michel Dreyfus, Bruno Groppo, Claudio Ingerflom, Roland Lew, Claude Pennetier, Bernard Pudal y Serge Wolikow; París, les editions de ratelier, 2000, 542 páginas

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