Fig. 2From: Gold Nanoparticles of Diameter 13 nm Induce Apoptosis in Rabbit Articular ChondrocytesAuNPs induce cytotoxicity in rabbit articular chondrocytes. a cytotoxicity of 3, 13, and 45 nm AuNPs. *P < 0.05 and **P < 0.01, compared with control. b time-dependent cytotoxicity of 13 nm AuNPs. *P < 0.05 and **P < 0.01, compared with control. c Microscopic images of chondrocytes after treatment with 3, 13, and 45 nm AuNPs, respectively, for 24 h. Original magnification: ×200Back to article page