Fig. 1From: Rapid and simple detection of endospore counts in probiotic Bacillus cultures using dipicolinic acid (DPA) as a markerEffects of different clathrates with EuCl3 (a) and TbCl3 (b) on DPA fluorescence intensity and emission fluorescence spectra. DPA final concentration 400 nM (a), and 100 nM (b)Back to article page