Selknamella: a new agglutinated foraminiferal genus from the early Eocene southern high latitudes

A new, unusual agglutinated foraminifera, Selknamella basketi n. gen., n. sp. is described from the Fuegian lower Eocene, Magallanes Basin, southernmost South America. It has a morphology and paleohabitat similar to those of the subfamily Remaneicinae Loeblich and Tappan, 1964, particularly to the Holocene genera Bruneica Brönnimann, Keij and Zaninetti, 1983, and Remaneica Rhumbler, 1938: It has a low trochospirally coiled to patelliform small test; the first two or three embryonic chambers are globular and undivided; following chambers are semilunate-shaped from spiral view and mushroom-shaped from umbilical view, and subdivided by radial secondary septula. Selknamella n. gen. differs from all the organically-cemented Remaneicinae by the perforate rigid wall, completely calcareous in the initial chambers to very finely agglutinated in the last whorls. The new genus is the only case of calcareous cemented agglutinated foraminifera in the Cretaceous and Cenozoic of the Magallanes Basin, and is restricted to the early Eocene, coincident with the warmest time in the high southern latitudes.Fil: Malumian, Norberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; ArgentinaFil: Nañez, Carolina Adela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; ArgentinaFil: Jannou, Gabriel Eugenio. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; ArgentinaFil: Arenillas, I.. Universidad de Zaragoza; Españ

Notícia dels ingressos recents del Gabinet de Dibuixos i Gravats

El Gabinet de Dibuixos i Gravats (GDG) ha promogut els darrers anys una activa política de captació de béns que ha fet augmentar el seu nodrit fons –format per més de 140.000 obres– amb ingressos de gran qualitat. Així, cal remarcar l’enriquiment i la diversificació que ha suposat la presència d’artistes que no estaven representats o no eren prou ben representats a la col•lecció com, entre d’altres, Carles Casagemas, Cassandre, Josep Renau o Antoni Clavé. El destacat conjunt d’obres incorporades recentment contribuirà sens dubte a consolidar el GDG com a principal centre públic català dedicat a la conservació i l’estudi d’obra sobre paper.In recent years the Cabinet of Drawings and Prints (GDG) has pursued an active policy of asset raising that has increased its sizeable collection – made up of over 140,000 works – with admissions of great quality. Thus, the collection has been enriched and diversified by the presence of artists that were previously either not represented or not well enough represented like, among others, Carles Casagemas, Cassandre, Josep Renau or Antoni Clavé. The outstanding group of works recently incorporated will doubtlessly contribute to consolidating the GDG as the principal Catalan public centre devoted to the conservation and study of works on paper.El Gabinete de Dibujos y Grabados (GDG) ha promovido en los últimos años una activa política de captación de bienes que ha hecho aumentar sus nutridos fondos –formados por más de 140.000 obras– con ingresos de gran calidad. Así, hay que destacar el enriquecimiento y la diversificación que ha supuesto la presencia de artistas que no estaban representados o no estaban suficientemente bien representados en la colección como, entre otros, Carles Casagemas, Cassandre, Josep Renau o Antoni Clavé. El destacado conjunto de obras incorporadas recientemente contribuirá sin duda a consolidar el GDG como el principal centro público catalán dedicado a la conservación y estudio de obra sobre papel

The use of in situ hybridisation and immunocytochemistry to characterise coiled bodies in plant meiocytes

2 páginas, 2 figuras.-- Trabajo presentado a la XI European Conference on Electron Microscopy- EUREM11 celebrada en Dublín (Irlanda) del 26 al 30 de Agosto de 1996.This study was supported by project DGICYT PB92-0079-CO3-O3.Peer reviewe

Perylene-Grafted Silicas: Mechanistic Study and Applications in Heterogeneous Photoredox Catalysis

This is the peer reviewed version of the following article: Chem. Eur. J. 2019, 25, 14928 14934, which has been published in final form at https://doi.org/10.1002/chem.201903539. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving[EN] A mechanistic study is herein presented for the use of heterogeneous photocatalysts based on perylene moieties. First, the successful immobilization of perylene diimides (PDI) on silica matrices is demonstrated, including their full characterization by means of electronic microscopy, surface area measurements, powder XRD, thermogravimetric analysis, and FTIR, Si-29 and C-13 solid-state NMR, fluorescence, and diffuse reflectance spectroscopies. Then, the photoredox activity of the material was tested by using two model reactions, alkene oxidation and 4-nitrobenzylbromide reduction, and mechanistic studies were performed. 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