Limits of tolerance(耐受限度) a The range of a certain ecological factor from the maximun to the minimum that the microbe can Withstand for example, the ph limited for the mould is 1.510Limits of tolerance (耐受限度) ◼ The range of a certain ecological factor from the maximun to the minimum that the microbe can withstand ◼ for example, the pH limited for the mould is 1.5~10