Scanning electron microscopy 292 scanning electron microscopy 127 Article 113 Fourier transform infrared spectroscopy 90 controlled study 86 human 78 nonhuman 76 High resolution transmission electron microscopy 68 chemistry 67 Humans 66 X ray diffraction 64 transmission electron microscopy 61 Field emission microscopes 56 Microscopy, Electron, Scanning 54 procedures 47 Field emission scanning electron microscopy 46 unclassified drug 43 in vitro study 38 Morphology 35 surface property 35 drug effect 34 ultrastructure 32 Energy dispersive spectroscopy 31 Nanoparticles 30 metabolism 30 particle size 29 Animals 27 animal 27 pH 27 Thermogravimetric analysis 26