Document Detail


Combination of high-intensity pulsed electric fields with natural antimicrobials to inactivate pathogenic microorganisms and extend the shelf-life of melon and watermelon juices.
MedLine Citation:
PMID:  18355673     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of high-intensity pulsed electric field (HIPEF) combined with citric acid (0.5-2.0%, w/v) or cinnamon bark oil (0.05-0.30%, w/v) against populations of Escherichia coli O157:H7, Salmonella Enteritidis and Listeria monocytogenes in melon and watermelon juices were evaluated. Microbiological shelf-life and sensory attributes were also determined. Populations of E. coli O157:H7, S. Enteritidis and L. monocytogenes were reduced by more than 5.0log(10)CFU/ml in HIPEF-processed melon (35kV/cm for 1709 micros at 193Hz and 4 micros pulse duration) and watermelon (35kV/cm for 1682 micros at 193Hz and 4 micros pulse duration) juices containing 2.0% and 1.5% of citric acid, respectively, or 0.2% of cinnamon bark oil. In addition, these treatments were also able to inactivate mesophilic, psychrophilic and, molds and yeasts populations, leading to a shelf-life of more than 91 days in both juices stored at 5 degrees C. Hence, the microbiological quality and safety of these fruit juices by combining HIPEF and citric acid or cinnamon bark oil were ensured. However, the taste and odor in those HIPEF-treated melon and watermelon juices containing antimicrobials were significantly affected. Therefore, further studies are needed to decrease the impact on the sensory attributes by using antimicrobials.
Authors:
Jonathan Mosqueda-Melgar; Rosa M Raybaudi-Massilia; Olga Martín-Belloso
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-01-20
Journal Detail:
Title:  Food microbiology     Volume:  25     ISSN:  1095-9998     ISO Abbreviation:  Food Microbiol.     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-03-21     Completed Date:  2008-04-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8601127     Medline TA:  Food Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  479-91     Citation Subset:  IM    
Affiliation:
Department of Food Technology, University of Lleida, UTPV-CeRTA, Av. Alcalde Rovira Roure 191, 25198 Lleida, Spain.
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MeSH Terms
Descriptor/Qualifier:
Anti-Bacterial Agents / pharmacology
Beverages* / microbiology,  standards
Citric Acid / pharmacology
Citrullus / microbiology
Colony Count, Microbial
Consumer Product Safety
Cucurbitaceae / microbiology*
Electric Stimulation / methods
Escherichia coli O157 / drug effects,  growth & development*
Food Contamination / prevention & control
Food Preservation / methods*
Humans
Listeria monocytogenes / drug effects,  growth & development*
Oils, Volatile / pharmacology
Salmonella enteritidis / drug effects,  growth & development*
Taste
Time Factors
Chemical
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Oils, Volatile; 0/cinnamon oil, bark; 77-92-9/Citric Acid

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