Fig. 6From: Detection of hepatic maturation by Raman spectroscopy in mesenchymal stromal cells undergoing hepatic differentiation a Ratio of integral area (2800–3000 cm–1/400–565 cm–1) and b correlation of coefficient during hepatic differentiation of the MSCs. The ratio was increased and exhibited a high degree of correlation with the induction time from day 7 to day 17 of hepatic differentiation. Groups with different alphabetical letters are significantly different, whereas groups with same alphabetical letters are not. HD Hepatic differentiation day, MSC Mesenchymal stromal cellBack to article page