| RP-HPLC | reversed phase high pressure liquid chromatography |
| GFC | gel filtration chromatography |
| MMAD | mass median aerodynamic diameter |
| GSD | geometric standard deviation |
| HBEC | Human Bronchial Epithelial Cells |
| MTT | 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide |
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