Figure 2.

The three typical assays for a sample with nominally prepared 1 × 103 pfu of M13 bacteriophages (a) without laser irradiation; (b) after laser irradiation for about 10 hours. The extremely few number of plaques observed in the irradiated sample is a manifestation of almost complete inactivation of the M13 bacteriophages in the sample.

Tsen et al. Virology Journal 2007 4:50   doi:10.1186/1743-422X-4-50
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