abstract:R2A agar (Reasoner´s 2A agar) is a culture medium developed to study bacteria which normally inhabit potable water. These bacteria tend to be slow-growing species and would quickly be suppressed by faster-growing species on a richer culture medium.
Microorganismson bio-ceramics andbiologicalactivated carbon were detached by ultrasonic, culturing onR2A and LB agar, respectively, followed by genomeDNAextracting.