Article 75 physical chemistry 69 chemistry 64 controlled study 56 QD Chemistry 46 Physical and theoretical chemistry 42 nonhuman 39 human 31 Quantum chemistry 25 unclassified drug 25 particle size 23 Humans 22 metabolism 22 pH 17 physical parameters 16 X ray diffraction 15 nanoparticle 15 Animals 14 article 14 scanning electron microscopy 14 QD1-999 Chemistry 13 animal 13 chemical composition 13 water 13 Particle Size 12 Temperature 12 drug delivery system 12 drug effect 12 procedures 12 temperature 12