Document Detail

Evaluation of citric acid and GDL in the recovery at different pH levels of Clostridium sporogenes PA 3679 spores subjected to HTST treatment conditions.
MedLine Citation:
PMID:  8796426     Owner:  NLM     Status:  MEDLINE    
Spores of Clostridium sporogenes PA 3679 were treated at different temperatures (121, 126, 130 and 135 degrees C) in white asparagus purée (pH 5.8) and acidified with glucono-delta-lactone (GDL) and citric acid to pH levels of 5.5, 5.0 and 4.5. Afterwards, the spores were recovered in MPA3679 medium in various conditions: unacidified (pH 7.5), acidified with GDL (500 ppm) and acidified with citric acid (500 and 250 ppm) to pH levels of 6.5, 6.0 and 5.0. The results indicated that the pH levels, concentration and type of acid used act synergistically rather than independently. Citric acid has a stronger inhibiting effect than GDL on the recovery of C. sporogenes PA 3679 spores. At the higher heat treatments (130 and 135 degrees C) the major injury on the spores sensitize more than against the acids and low pH values.
M H Silla Santos; J Torres Zarzo
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of food microbiology     Volume:  29     ISSN:  0168-1605     ISO Abbreviation:  Int. J. Food Microbiol.     Publication Date:  1996 Apr 
Date Detail:
Created Date:  1996-10-24     Completed Date:  1996-10-24     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8412849     Medline TA:  Int J Food Microbiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  241-54     Citation Subset:  IM    
Instituto de Agroquimica y Tecnologia de Alimentos (C.S.I.C.), Valencia, Spain.
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MeSH Terms
Citrates / pharmacology*
Citric Acid
Clostridium / drug effects*,  growth & development,  isolation & purification
Culture Media / chemistry
Food Microbiology*
Gluconates / pharmacology*
Hot Temperature*
Hydrogen-Ion Concentration
Spores, Bacterial / drug effects,  growth & development,  isolation & purification
Reg. No./Substance:
0/Citrates; 0/Culture Media; 0/Gluconates; 77-92-9/Citric Acid; 90-80-2/beta-glucono-1,5-lactone

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

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