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In particular, DNA was extracted from bacterial colonies picked up from plates, and resuspended in 1.0mL of sterile  water up to obtain 10µÄ9´Î·½ harvest cells useful for DNA extraction. Cellular density of water bacterial suspensions was spectroscopically measured (three replicates) by optical density at 600nm. TotalDNA (e.g., genetic material of live bacteria and/or released from inactivated bacteria) was extracted from UV/H2O2 treated watersamples collected at each time. Aliquots (1.0 mL) of each water sample were centrifuged for 10min at 14,000rpm in order to collect and concentrate genetic material up 0.25 OD (600nm). Pellets were resuspended in 180.0 ¦ÌL of extraction buffer (ATL) and used for DNA extraction.

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