Search results for " process"
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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…
«La speranza di avere altri figli»: bios e democrazia nel logos epitaphios di Pericle
2020
Questo contributo esamina, nella consolatio ad parentes che chiude il logos epitaphios, il modo in cui Pericle propone di superare il lutto che ha colpito alcuni padri nel primo anno di guerra, invitandoli in primo luogo a generare altri figli. Ciò consentirebbe a quei padri di superare la potenziale aporia tra l’agire nell'interesse strettamente individuale e l’agire nell’interesse della grandezza della polis, obliando il dolore privato con la procreazione di altri figli e con l’onore garantito dalla memoria pubblica: verrebbe così ripristinato l’equilibrio necessario tra partecipazione democratica, condizione di rischio condivisa e adeguatezza del processo deliberativo. All’interno della …