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SEM images of Neusilin® US2 loaded with 1:2 w/w PEG-35 castor oil (Cremophor® EL) at 450× (a), 950× (b) and 4000× (c) magnifications and loaded with 1:3 w/w Cremophor® EL at 500× (d), 1000× (e) and 3300× (f) magnifications. Microscopic scales are shown with the images for comparison.
