Comparison of Synergistic Effect of Nisin and Monolaurin on the Inactivation of Three Heat Resistant Spores Studied by Design of Experiments in Milk

Figure 2

Response surface and contour plots showing the effects of nisin and pH on the spores’ inactivation in (a) distilled water and (b) milk. The data on the contour maps are log N₀/N. N₀ represents the plate count of the untreated spore suspension (10⁷spores/ml), and N represents the plate count after treatment with antimicrobial agents.

(a)

(b)