- Output titer : 1 ㎕ of output sample in 1 ml of SB ( Output 1 ) → 10 ㎕ in 100 ㎕ of SB ( Output 2 ) →> Output 1 , 2 ( n 1 , n 2 ) 모두 100 ㎕ 씩 spreading → Output 1 = n 1 * 10 - 5 , Output 2 = n 2 * 10 - 6