TABLE 2.
D valuesa (J m−2) and slopes of survival curves from various bacterial strains
| Strain | Slope | R2 | D37 (%) | D10 (%) |
|---|---|---|---|---|
| E. coli K-12 | −0.272 ± 0.037 | 0.964 ± 0.013 | 5.4 ± 0.5 (100) | 10.3 ± 1.1 (100) |
| S. algae | −0.311 ± 0.031 | 0.989 ± 0.005 | 4.0 ± 0.5 (74.1) | 8.2 ± 0.9 (79.6) |
| S. oneidensis MR-4 | −0.330 ± 0.020 | 0.990 ± 0.007 | 2.9 ± 0.8 (53.7) | 6.8 ± 0.9 (66.0) |
| S. putrefaciens 200 | −0.690 ± 0.014 | 0.991 ± 0.004 | 1.9 ± 0.1 (35.2) | 3.8 ± 0.1 (36.9) |
| S. oneidensis DLM7 | −0.879 ± 0.044 | 0.994 ± 0.005 | 1.0 ± 0.2 (18.5) | 2.5 ± 0.2 (24.3) |
| S. oneidensis MR-1 | −0.937 ± 0.028 | 0.962 ± 0.022 | 0.3 ± 0.2 (5.6) | 1.7 ± 0.2 (16.5) |
a
D values are the radiation dose that reduced a cell population to a specified percentage of the original number of the cells (33). D37 is the radiation does required to inactivate 63% of a bacterial population. D10 is the radiation dose which inactivated 90% of the bacterial population. The D values were calculated from the regression line of the exponential slope of the survival curve.