UV exposure (dose)

10 ppm

100 ppm

500 ppm

1000 ppm

UV-A (1.4mW/cm2)

5.4

6.0

6.5.

7.5

UV-B (0.4mW/cm2)

No

4.4

4.8

5.0

Dark

No

No

No

No

Table 7: Inhibition zone at different concentration of pyrene on exposing to UV-A, UV-B and sunlight.
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