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Unraveling environmental histories from skeletal diaries — Advances in sclerochronology
2013
High-resolution proxy archives from aquatic settings are essential to better understand processes and mechanisms of global change. During the last decade, it has become increasingly evident that calcified tissues of bivalve mollusks and cold-water corals, in particular, can significantly increase our knowledge of seasonal to multi-decadal paleoclimate and paleoenvironmental variability in the extratropical oceans and coastal marine settings. Daily, tidal, fortnightly and annual growth patterns of periodically formed skeletal hard parts provide a means to place the proxy record in a precise temporal context. Their extreme longevity coupled with the running similarity between growth increment…
Variation in Sr uptake in the shell of the freshwater gastropod Bithynia tentaculata from Lake Arreo (northern Spain) and culture experiments
2010
The Sr uptake features in Bithynia tentaculata aragonite shells from monthly collections in Lake Arreo (northern Spain) over a two-year period are compared with those from the same species grown in culture experiments with similar waters under controlled temperature. The shell aragonite of B. tentaculata from Lake Arreo formed in isotopic equilibrium with the lake water. A comparison of the stable oxygen isotope values (δ18O) from the shells and waters allowed the selection of suitable shells for Sr uptake studies. The Sr/Ca molar ratio in B. tentaculata shells (Sr/Cashell) from the lake and from the culture experiments positively correlate with some chemical parameters like conductivity an…
Riconsiderare l’identità delle donne musulmane nell’Egitto post-rivoluzionario
2019
Questo articolo esplora alcune forme dell’identità femminile nell’Egitto post-rivoluzionario, quale si manifesta in due documenti pubblicati dopo la Rivoluzione del 2011 sui diritti delle donne musulmane. Sono il Documento di al–Azhar (2013) e la Dichiarazione di Alessandria (2014), concordi nel ribadire il valore delle donne e i diritti garantiti loro dalla shari‘a. L’uno e l’altra hanno visto il coinvolgimento delle femministe islamiche. Si descrivono anche le possibilità di collaborazione tra al-Azhar e le femministe islamiche, per fondare una conoscenza religiosa-femminista autoctona e sensibile al genere. Tale collaborazione è utile per l’affermazione di un’identità femminile rispettos…