Table 2.
Chemical/physical variables (X-matrix) included in the final PLS model for lung toxicity.
| Chemical/physical component | Name used for loading plot |
|---|---|
| Particulate mass | PM |
| Semivolatile organic mass | SVOC |
| Nitrate | NO3 |
| Sulfate | SO4 |
| Ammonium | NH4 |
| Particle organic carbon mass | Particle organic carbon |
| Elemental carbon | EC |
| Total carbon | TC |
| 1st carbon thermal fraction | O1TC |
| 2nd carbon thermal fraction | O2TC |
| 3rd carbon thermal fraction | O3TC |
| 4th carbon thermal fraction | O4TC |
| 5th carbon thermal fraction | OPTC |
| 6th carbon thermal fraction | E1TC |
| 7th carbon thermal fraction | E2TC |
| 8th carbon thermal fraction | E3TC |
| Transition metals | Trans. met |
| Alkali earth metals | Earth met |
| Metalloids | Metalloids |
| Nonmetal elements | Non-met |
| Group 3A metals | 3A metals |
| Group 4A metals | 4A metals |
| Total PAHs | Total PAH |
| SVOC PAHs | SVOC PAH |
| PM PAHs | PM PAH |
| Two-ring PAHs | 2-ring PAH |
| Three-ring PAHs | 3-ring PAH |
| Four-ring PAHs | 4-ring PAH |
| Five-ring PAHs | 5-ring PAH |
| > Five-ring PAHs | > 5-ring PAH |
| Nitro-PAHs | Nitro-PAH |
| Oxygenated PAHs | Oxy-PAH |
| C27-20S-13β(H),17α(H)-diasterane | S1 |
| C27-20R-13β(H),17α(H)-diasterane | S2 |
| C27-20S-13α(H),17β(H)-diasterane | S3 |
| C27-20R-13α(H),17β(H)-diasterane | S4 |
| C28-20S-13β(H),17α(H)-diasterane | S5 |
| C27-20S-5α(H),14α(H)-cholestane | S6 |
| C27-20R-5α(H),14β(H)-cholestane | S7 |
| C27-20S-5α(H),14β(H),17β(H)-cholestane | S8 |
| C27-20R-5α(H),14α(H),17α(H)-cholestane | S9 |
| C28-20S-5α(H),14α(H),17α(H)-ergostane | S10 |
| C28-20R-5α(H),14β(H),17β(H)-ergostane | S11 |
| C29-20R-13α(H),17β(H)-diasterane | S12 |
| C27-tetracyclic terpane | S13 |
| C28-20R-5α(H),14α(H),17α(H)-ergostane | S14 |
| C27-tetracyclic terpane II | S15 |
| C28-tetracyclic terpane | S16 |
| C29-20S-5α(H),14α(H),17α(H)-stigmastane | S17 |
| C28-tetracyclic terpane II | S18 |
| C29-20R-5α(H),14β(H),17β(H)-stigmastane | S19 |
| C29-20S-5α(H),14β(H),17β(H)-stigmastane | S20 |
| 18α(H),21β(H)-22,29,30-trisnorhopane | H1 |
| 17α(H),18α(H),21β(H)-25,28,30-trisnorhopane | H2 |
| C29-20R-5α(H),14α(H),17α(H)-stigmastane | H3 |
| 17α(H),21β(H)-22,29,30-trisnorhopane | H4 |
| 17α(H),18α(H),21β(H)-28,30-bisnorhopane | H5 |
| 17α(H),21β(H)-30-norhopane | H6 |
| 18α(H),21β(H)-30-norneohopane | H7 |
| 17α(H),21β(H)-hopane | H8 |
| 17β(H),21α(H)-hopane | H9 |
| 22S-17α(H),21β(H)-30-homohopane | H10 |
| 22R-17α(H),21β(H)-30-homohopane | H11 |
| 17β(H),21β(H)-hopane | H12 |
| 22S-17α(H),21β(H)-30,31-bishomohopane | H13 |
| 22R-17α(H),21β(H)-30,31-bishomohopane | H14 |
| 22S-17α(H),21β(H)-30,31,32-trishomohopane | H15 |
| 22R-17α(H),21β(H)-30,31,32-trishomohopane | H16 |