| Acronym | Meaning |
| UFP | Ultrafine Particles |
| PAPP-A | Pregnancy-associated Plasma Protein A |
| EQCIS | Electrochemical Quartz Crystal Impedance System |
| PON | Particulate Organic Nitrogen |
| AVIRIS | Airborne Visible-infrared Imaging Spectrometer |
| SAC | Spectral Absorption Coeff. |
| MIDAS | Metal Ion-dependent Adhesion Site |
| OBIC | Optical Beam Induced Current |
| DPA | Destructive Physical Analysis |
| ROVP | Reactance Operator Variational Principle |