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The influence of dilution rate (D) and aeration on soluble and cell-bound nisin Z production was investigated during continuous free (FC) and immobilized cell (IC) cultures with Lactococcus lactis subsp. lactis biovar diacetylactis UL719 in supplemented whey permeate. Maximum total bacteriocin titres during non-aerated continuous FC and IC cultures were obtained for low D, with 1490 and 1090IUmL ...
The sensitivities of vegetative cells of strains ofListeria, Clostridium, Staphylococcus, Lactococcus, Lactobacillus, MicrococcusandPediococcus, and of spores ofClostridiumandBacillusto three broad spectrum bacteriocins (nisin A, nisin Z and pediocin) from lactic acid bacteria were determined by a critical dilution micro-assay. The minimal inhibitory concentrations (MIC) of partially purified bacteriocins,...
Lactococcus lactissubsp.cremorisstrain J46, isolated from fermented milk, produced a new bacteriocin designated as bacteriocin J46. The bacteriocin demonstrated inhibitory activity towards some strains of lactobacilli, lactococci, bacilli, clostridia andStreptococcus thermophilus, and toward outgrowth ofClostridium tyrobutyricumspores. The antimicrobial substance was resistant to treatment with papain...
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