Journal
FOOD RESEARCH INTERNATIONAL
Volume 39, Issue 5, Pages 575-580Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foodres.2005.11.005
Keywords
vanillin; natural antimicrobial; MIC; fresh-cut apple; shelf life; pathogenic and spoilage microorganisms
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The antimicrobial effect of vanillin against four pathogenic or indicator organisms; Escherichia coli, Pseudomonas aeruginosa, Enterobacter aerogenes, and Salmonella enterica subsp. enterica serovar Newport and four spoilage organisms; Candida albicans, Lactobacillus casei, Penicillum expansum, and Saccharomyces cerevisiae that could be associated with contaminated fresh-cut produce, was examined. The minimal inhibitory concentration (MIC) of vanillin was dependent upon the microorganism and this ranged between 6 and 18 mM. When incorporated with a commercial anti-browning dipping solution (calcium ascorbate, NatureSeal (TM)), 12 mM vanillin inhibited the total aerobic microbial growth by 37% and 66% in fresh-cut 'Empire' and 'Crispin' apples, respectively, during storage at 4 degrees C for 19 days. Vanillin (12 mM) did not influence the control of enzymatic browning and softening by NatureSeal. These results provide a new insight for vanillin as a potential antimicrobial agent for refrigerated fresh-cut fruits and vegetables. (c) 2005 Elsevier Ltd. All rights reserved.
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