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Physical property indices of frankincense and processed frankincense: (A) SEM image of frankincense; (B) SEM image of processed frankincense; (C) particle size distribution of frankincense; (D) particle size distribution of processed frankincense; (E) particle size and PDI of frankincense and processed frankincense; and (F) radar plots of five physical property indices (ZP, specific surface, porosity and flow times of intestinal and gastric fluid).
