Figure 2. (a) UV–Vis spectra of pure catechin (CAT) and catechin-bovine serum albumin nanoparticles (CAT-BSA NPs) and catechin-bovine serum albumin (CAT-BSA) supernatant solution (left after the removal of synthesized CAT-BSA NPs), (b) UV–Vis spectra of pure epicatechin (ECAT), epicatechin-bovine surum albumin nanoparticles (ECAT-BSA NPs) and epicatechin-bovine serum albumin (ECAT-BSA) supernatant solution (left after the removal of synthesized ECAT-BSA NPs).