Fig. 6: Biodegradation of CHX PR4+ NPs in artificial saliva tracked for consecutive 10 days.
a The measured absorbance of CHX PR4+ NPs at 253 nm; b mass spectra of (i) CHX PR4+ NPs in saliva and (ii) degraded CHX PR4+ NPs; c the proposed scheme for the degradation pathway concluded from the mass spectrometry results.
