Fig. 3

DL analysis of Acorus calamus L. samples. a DL decay curves comparison among Acorus calamus L. samples. BG = background. b DL properties comparison among Acorus calamus L. samples. I0 is the initial intensity of the DL curve, Beta is an index factor associated with the rate of DL decay, and Tau and T represent the DL characteristics and decay time, respectively. *p < 0.05. c PCA score plots of the DL properties obtained from Acorus calamus L. samples. d PCA biplot shown how strongly each parameter influence the similarity of DL decay curves