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Scanning electron microphotographs of solid dispersions and physical mixtures with PEG 6000 as carrier (1:6 w/w). (A) Tanshinone IIA-PEG 6000 solid dispersion, (B) tanshinone IIA-PEG 6000 physical mixture, (C) cryptotanshinone-PEG 6000 solid dispersion, (D) cryptotanshinone-PEG 6000 physical mixture, (E) total tanshinones-PEG 6000 solid dispersion, (F) total tanshinones-PEG 6000 physical mixture.
