Fig. 2. CD spectra of SF in solution in PBS. On the top SF in buffer at pH 4 (a) and pH 7.4 (b) at different ultrasound treatments of the solutions (e.g. w/o ultrasound treatment, after 1.5 hours, and after 3 hours of ultrasound treatment). (c) SF in buffer pH 4 and (d) PBS pH 7.4 at the initial time and two months after solvation.
