Fig. 4From: Supercritical fluid extraction of polyphenols from lees: overall extraction curve, kinetic data and composition of the extractsThin-layer chromatography of the extracts obtained by soxhlet (a) and agitated bed (b) extraction. Plates are shown under a UV light of wavelength 366 nm. The X axis indicates the extraction time and Y axis indicates the number of the identified bandsBack to article page