Fig. 6

PCA plots for examining the correlation among Cu concentrations in different subcellular partitioning in (A, B) liver, (C, D) kidney, and (E, F) intestine of grass crap exposed to 0.03, 0.1, and 0.3 µg mL− 1 CuNPs of 40–60 (hollow spot) and 60–80 nm (solid spot). The triangle points in (A, C, and E) represent the center of the PCA groups.