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(a) Enhydrin (µg mL-1)
(b) Uvedalin (µg mL-1)
(c) Sonchifolin (µg mL-1)
Positive control
Negative control
0.5 1.0 1.5 2.0
2.01.51.00.5
0.5 1.0 1.5 2.0