Fig. 5

Changes of the enzyme activities of ALP, ACP, AChE, NOS and SOD of B. straminea snails exposed to compounds 8 and 9. Significant differences between control and treatment groups were tested by one-way ANOVA (ACP: F_{(2, 15)} = 6.37, P = 0.019; NOS: F_{(2, 15)} = 12.04, P < 0.001)