Sudan orange
1.① After 21 days, many lipid droplet of high refractivity occurred in many cytoplasm in the treatment group, the Sudan fat stain showed orange, and Kossa method also detected a few osteogenesis, approximately 70% ?28/40? and 10% ?4/40? of the MSCs were transformed into adipocytic and osteogenetic cells in medium containing adipogenesis supplement medium respectively.

