Within 30 days storage period, with the extension of storage time, the treatment group and contrast group are in rising trend, the rising rate of treatment group is lower then contrast group. 0 days there is no significant difference, 7 days the treatment group was significantly lower than the control group. 22nd day and 15th day, no difference between the total number of bacteria colonies, product bacteria achieves a relatively stable state; Later, the total number of bacteria growth slowly. 30th day, inhibition effect of preservative reduced. Within 30 days storage period, the treatment group can effectively inhibit growth rate of total bacteria, microbial breeding has been effectively controlled, expecting to extend product shelf life to more than 40 days is possible.
Polylysine is an ideal natural antimicrobial to prolong the shelflife, with a high natural antimicrobial activity against a wide range of fungi, Gram-positive and Gram-negative bacteria and their spores.