Figure 7.

Binding of phenolic compounds in the EVOO extracts to preformed fibrils of Aβ40. (a) UV–visible absorption spectra of Greek (left) and Saudi (right) extracts (20 μg/mL) alone (black lines) and of the supernatant obtained after the addition of 20 μM Aβ40 fibrils, incubation for 24 h, and removal of insoluble material by centrifugation (red lines). (b) Reverse-phase HPLC chromatograms at 3 nm of the Greek (left) and Saudi (right) extracts alone (black) and after the addition and removal of Aβ40 fibrils (red). The main peaks, retention times, and some assignments are given in Table 5.