Fig. 3From: Biochemical effects of polypropylene microplastics on red tilapia (Oreochromis niloticus) after individual and combined exposure with boronChange in AChE activity in the brain of fish following various treatments with PP-MPs and boron over 21-day exposure duration. Error bars indicate ± SD (n = 5). Bars surmounted with different letters are statistically different (p < 0.05, Tukey multiple comparison tests)Back to article page