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(A) Apoptosis detection after co-cultivation of TS, TS@PAP or PTX with osteosarcoma cells in a solution with a pH of 6.5. (B–F) Quantitative analysis of apoptosis detection after co-cultivation with osteosarcoma cells for 48 h in a solution with a pH of 6.5 (n = 5, ∗P < 0.05, ∗∗∗P < 0.01).
