Fig. 3
From: Unique formation of organic glass from a human brain in the Vesuvius eruption of 79 CE
DSC curves for heating experiments. The blue line represents sample C7 analyzed using C-DSC at a heating rate of 25 K min− 1 (0.42 K s− 1), while the red line represents a fragment of sample C1 analyzed using F-DSC at a heating rate of 1000 K s− 1. Upward and downward peaks correspond to endothermic and exothermic events, respectively. The temperature at the onset of relaxation (Tf) is indicated by the intersection of the two tangents drawn to the baseline at the beginning of the first endothermic event. Thermal events are interpreted in the text.
