Document Detail


Viability, efficacy, and storage stability of freeze-dried biocontrol agent Candida sake using different protective and rehydration media.
MedLine Citation:
PMID:  11403138     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Viability, efficacy against Penicillium expansum on Golden Delicious apples, and storage stability of freeze-dried Candida sake strain CPA-1 were studied. The effect of several protective agents and rehydration media was investigated in the freeze drying of C. sake. Skimmed milk at 10% concentration was a good rehydration medium for all protectants tested. In general, good viability results were obtained when the same solution was used as a protectant and as a rehydration medium. The best survival was obtained when C. sake cells were protected with 10% lactose + 10% skimmed milk and rehydrated with skimmed milk (85% viability). The potential for biocontrol of the best freeze-dried treatments against P. expansum on apples was compared with that of fresh cells. Freeze-dried treatments at 1 x 10(7) CFU/ml reduced the incidence of decay by 45 to 66%. The best biocontrol effect was obtained with cells that had been freeze dried using 10% lactose + 10% skimmed milk as a protectant and 1% peptone as a rehydration medium, with a 66% reduction in rot incidence. However, in all treatments, the efficacy of freeze-dried cells was significantly lower than fresh cells. The stability of freeze-dried samples decreased during storage and was influenced by storage temperature. In the best treatment, storage of C. sake cells for 60 days at 4 degrees C resulte in final concentrations of 2.5 x 10(8) CFU/ml, which was a 10-fold reduction in relation to the initial starting concentration of cells prior to freeze drying.
Authors:
M Abadias; N Teixidó; J Usall; A Benabarre; I Viñas
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food protection     Volume:  64     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-06-13     Completed Date:  2001-10-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  856-61     Citation Subset:  IM    
Affiliation:
Postharvest Unit, CeRTA, Centre UdL-IRTA, Lleida, Catalonia, Spain. isabel.abadias@irta.es
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MeSH Terms
Descriptor/Qualifier:
Candida / growth & development*
Colony Count, Microbial
Cryoprotective Agents / pharmacology*
Food Handling / methods*
Freeze Drying
Penicillium / growth & development*
Rosales / microbiology*
Temperature
Time Factors
Chemical
Reg. No./Substance:
0/Cryoprotective Agents

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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