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THE ACTION OF NISIN ON SPOILAGE BACTERIA. I. THE EFFECT OF NISIN ON THE HEAT RESISTANCE OF BACILLUS STEAROTHERMOPHILUS SPORES
Author(s) -
THORPE R. H.
Publication year - 1960
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1960.tb00189.x
Subject(s) - nisin , spore , food spoilage , heat resistance , microbiology and biotechnology , bacillus (shape) , trypsin , chemistry , clostridium butyricum , bacteriocin , bacteria , food science , biology , biochemistry , enzyme , materials science , antimicrobial , genetics , fermentation , composite material
SUMMARY: Spores of two strains of Bacillus stearothermophilus were heated for various times both in the absence and presence of nisin and in the latter case both with and without subsequent destruction of the nisin with trypsin. The results obtained on enumeration of the survivors indicated that the reduction of heat resistance which was observed was apparent rather than real and was due to the adsorption of nisin on the spores. When this was removed by means of trypsin the heat resistance was restored almost to normal.