Gry H Barfod

INTRODUCTION From the end of the Roman period (ca. 400 CE), the supply of glass for the production of vessels, windows, and beads in Northern and Western Europe was increasingly dominated by recycling of Roman-period natron glass, supplemented by importation of contemporary glass types from the Eastern Mediterranean (e.g., Barfod, Feveile, & Sindbæk, 2022; Gratuze et al., 2021; Wedepohl, 2003).

Abstract The D” layer at the base of the Earth’s mantle exhibits anomalous seismic properties, which are attributed to heat loss from and chemical interaction with the underlying molten Fe-rich outer core. Here we show that mass transfer due to temperature variations within the D” layer could lead to resolvable fractionation of iron isotopes.

The CHARGE study was initiated in 2002 and is an ongoing population-based case–control study with participants from three strata: (1) children with autism spectrum disorder (ASD); (2) children with developmental delay but not autism (DD); (3) children selected from the general population without regard to developmental characteristics (GP).