Fig. 9From: Evaluating effect of metallic ions on aggregation behavior of β-amyloid peptides by atomic force microscope and surface-enhanced Raman ScatteringIntensity ratio I1375/I1669 of Aβ42 molecule in the absence and presence of metal cations (integration time for 10 s). All experiments were performed in triplicates (n = 3). **P < 0.01 vs. control (PBS); ##P < 0.01 vs. PBS + Zn2+; &&P < 0.01 vs. PBS + Ca2+Back to article page