Ba/Ca ratios in benthic foraminifera from recent core tops

The carbon isotope ratio (delta13C) and cadmium content (Cd/Ca) of benthic foraminifera shells have been used to reconstruct deep-water circulation patterns of the glacial oceans. These tracers co-vary with phosphorus in the modern ocean because they are nearly quantitatively regenerated from sinking biological debris in the upper water column. Hence they can be used to reconstruct the distribution of labile nutrients in glacial water masses. Independent constraints on glacial deep-ocean circulation patterns could be provided by a tracer of the distribution of silica and alkalinity, the deeply regenerated constituents of planktonic hard parts. Barium shares key aspects of its behaviour with these refractory nutrients because it is removed from solution in surface waters and incorporated into sinking particles which slowly dissolve deep in the water column and in the sediments. The fractionation of Ba between deep-water masses of the major ocean basins is largely controlled by thermohaline circulation patterns, so Ba conforms to different boundary conditions from Cd and 13C. As Ba substitutes into trigonal carbonates, it is a potential palaeoceano-graphic tracer if the Ba content of foraminifera shells reflects ambient dissolved Ba concentrations. Here we present data from Recent core-top benthic foraminifera which indicate that the Ba content of some recent calcitic benthic foraminifera does co-vary with bottom-water Ba.

Obras poéticas de Don José María Roa Bárcena de la Academia mejicana correspondiente de la española; publicanlas sus hijas con una introducción.

"Edicion completa de 200 ejemplares numerados. Ejemplar núm. 1 vendido.

Castalia bárbara. Los sueños son vida.

"A Castalia Bárbara (1899) se une, en la presente edición, la última obra lírica de Jaimes Freyre: Los sueños son vida (1917)"--Pref.

Castalia bárbara;

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Castalia bárbara y otros poemas /

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La débâcle de Emilio Zola;

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Elogio del historiador y novelista D. José María Roa Bárcena.

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Die Frauenkirche zu Dresden ; Geschichte ihrer Entstehung von Georg Bährs frühesten Entwürfen an bis zur Vollendung nach dem Tode des Erbauers /

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Werke : sorgfältig revidirte Gesammtausgabe in zehn Bänden.

v.2. Kritik der reinen Vernunft. 1828.-- v.3. Kleinere metaphysische Schriften. 1838.-- v.4. Grundlegung zur Metaphysik der Sitten, Kritik der praktischen Vernunft, nebst Abhandlungen zur philosophie der Geschichte. 1838.-- v.5. Metaphysik der Sitten in zwei Theilen, Rechtslehre, Tugendlehre. Nebst den kleineren Abhandlungen zur Moral and Politik.-- v.6. Schriften zur Philosophie der Religion. 1839.-- v.7. Kritik der Urtheilskraft. Beobachtungen über das Gefühl des Schönen und Erhabenen. 1839.-- v.8. Schriften zur Naturwissenschaft. Abt.1. 1838.-- v.9. Schriften zur Naturwissenschaft. Abt.2. 1839.-- v.10. Schriften zur Anthropologie und Pädagogik. Nebst einer Sammlung von Briefen und öffentlichen Erklärungen und einem chronologischen Verzeichnisse sämmtlicher Schriften Kant's.

Posli͡edni͡ai͡a borʹba baltīĭskikh slavi͡an protiv oni͡emechenīi͡a /

Errata slip inserted in v. 1.

Instituição da Companhia Geral de Pernambuco, e Paraíba.

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