Figure 1From: RETRACTED ARTICLE: Cardioprotective activity of placental growth factor in a rat model of acute myocardial infarction: nanoparticle-based delivery versus direct myocardial injectionCharacterization of nanoparticles. A: morphology revealed by transmission microscopy. B: bar graphs, showing the average diameters detected by NICOMP 380 ZLS.Back to article page