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Fig. 8 Fluorescence photographs of the newly hatched zebrafish larvae: Incubation with 20 μM of S1 for 30 min as control (a), incubation with 20 (b) and 40 (c) μM of S1 for 30 min followed by 20 and 40 μM of Zn2+ for 30 min, incubation with 20 (d) and 40 (e) μM of S1 for 30 min followed by 20 and 40 μM of F− for 30 min; Incubation with 20 μM of S2 for 30 min as control (f), incubation with 20 (g) and 40 (h) μM of S2 for 30 min followed by 20 and 40 μM of Zn2+ for 30 min, incubation with 20 (i) and 40 (j) μM of S2 for 30 min followed by 20 and 40 μM of F− for 30 min; Incubation with 20 μM of S3 for 30 min as control (k), incubation with 20 (l) and 40 (m) μM of S3 for 30 min followed by 20 and 40 μM of Zn2+ for 30 min, incubation with 20 (n) and 40 (o) μM of S3 for 30 min followed by 20 and 40 μM of F− for 30 min; All the fluorescence images were captured at 40× magnification.