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SEM images of a berberine-loaded particle (BP) prepared under a different mole ratio (λ) of BBR to β-CD via solution-enhanced dispersion by supercritical fluids (SEDS): (a) 1:2, Sample 1; (b) 1:1, Sample 2; (c) 3:1, Sample 3; (d) 5:1, Sample 4; and (e) BBR only, Sample 5.
