Table 2.
Group | Number by SNPS (particles/cm3) | Diameter† (nm) | Surface area (nm2/cm3) | Mass concentration (mg/m3) |
---|---|---|---|---|
Unexposed | 9.99 × 102 ± 8.10 × 10 | NA | NA | 0.01 ± 0.01 |
Low | 3.33 × 106 ± 2.95 × 105 | 50.6 (1.82) | 6.45 × 1010 ± 7.04 × 109 | 0.46 ± 0.06 |
High | 6.17 × 106 ± 4.13 × 105 | 72.9 (2.02) | 2.72 × 1011 ± 3.70 × 1010 | 3.76 ± 0.24 |
Mean ± SE; †GM (GSD).