Fig. 4From: Biochemical effects of polypropylene microplastics on red tilapia (Oreochromis niloticus) after individual and combined exposure with boronChange in a CAT, b SOD, c GPx, and d GSH activity of fish liver 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