Fig. 1
From: Betulinic acid self-assembled nanoparticles for effective treatment of glioblastoma
Characterization of BA NPs and BA NP formation. A Molecular structure of BA. B A representative SEM image showing the size and morphology of BA NPs in lyophilized form. Scale bar: 500 nm. C A representative TEM image showing the size and morphology of BA NPs. Scale bar: 200 nm. D Computational simulation shows the formation of hydrogen bonds between molecules (arrow showed). E FTIR analysis shows blue-shift of O–H and the C=O group after BA assembles into NPs. F XRD analysis shows that BA exists in the amorphous state in BA NPs