Document Detail


Effect of non-thermal processing by High Hydrostatic Pressure on the survival of probiotic microorganisms: Study on Bifidobacteria spp.
MedLine Citation:
PMID:  21726655     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
High Hydrostatic Pressure (HP) processing has been suggested as an alternative method to improve textural attributes of dairy products. Since, the global market seeks improved functional foods, it is important to investigate whether HP processing can be applied to fermented dairy probiotic products. The inactivation kinetics of Bifidobacterium spp. in a model system of acid pH value under high pressure (100-400MPa) combined with moderate temperature (20-35°C) was investigated. Bifidobacterium spp. inactivation followed first order kinetics at all pressure-temperature combinations used. Pressure and temperature were found to act synergistically on the viability loss of the bacterium. The corresponding z(T) and z(P) values of inactivation were also estimated and, values of 41.5°C and 93.5MPa at reference pressure of 200MPa and reference temperature of 25°C were estimated, respectively. HP treatment of 200MPa at 20-25°C for 10-15min, recommended for textural modification, is not detrimental to the viability of the studied probiotic culture and would be suitable for respective fermented probiotic products.
Authors:
M S Tsevdou; P S Taoukis
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-25
Journal Detail:
Title:  Anaerobe     Volume:  -     ISSN:  1095-8274     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-7-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9505216     Medline TA:  Anaerobe     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ltd.
Affiliation:
National Technical University of Athens, School of Chemical Engineering, Laboratory of Food Chemistry and Technology, 5 Iroon Polytechniou Str., Zografou 15780, Athens, Greece.
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