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Modeling the combined effects of pH, temperature and ascorbic acid concentration on the heat resistance of Alicyclobacillus acidoterrestis.
Int J Food Microbiol. 2007 Dec 15; 120(3):266-73.IJ

Abstract

In this study, thermal inactivation parameters (D- and z-values) of Alicyclobacillus acidoterrestris spores in McIlvaine buffers at different pH, apple juice and apple nectar produced with and without ascorbic acid addition were determined. The effects of pH, temperature and ascorbic acid concentration on D-values of A. acidoterrestris spores were also investigated using response surface methodology. A second order polynomial equation was used to describe the relationship between pH, temperature, ascorbic acid concentration and the D-values of A. acidoterrestris spores. Temperature was the most important factor on D-values, and its effect was three times higher than those of pH. Although the statistically significant, heat resistance of A. acidoterrestris spores was not so influenced from the ascorbic acid within the concentration studied. D-values in apple juice and apple nectars were higher than those in buffers as heating medium at similar pH. The D-values ranged from 11.1 (90 degrees C) to 0.7 min (100 degrees C) in apple juice, 14.1 (90 degrees C) to 1.0 min (100 degrees C) in apple nectar produced with ascorbic acid addition, and 14.4 (90 degrees C) to 1.2 min (100 degrees C) in apple nectar produced without ascorbic acid addition. However, no significant difference in z-values was observed among spores in the juices and buffers at different pH, and it was between 8.2 and 9.2 degrees C. The results indicated that the spores of A. acidoterrestris may survive in fruit juices and nectars after pasteurization treatment commonly applied in the food industry.

Authors+Show Affiliations

Food Engineering Department, Hacettepe University, 06800, Beytepe, Ankara, Turkey. bahceci@hacettepe.edu.trNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17936391

Citation

Bahçeci, K Savaş, and Jale Acar. "Modeling the Combined Effects of pH, Temperature and Ascorbic Acid Concentration On the Heat Resistance of Alicyclobacillus Acidoterrestis." International Journal of Food Microbiology, vol. 120, no. 3, 2007, pp. 266-73.
Bahçeci KS, Acar J. Modeling the combined effects of pH, temperature and ascorbic acid concentration on the heat resistance of Alicyclobacillus acidoterrestis. Int J Food Microbiol. 2007;120(3):266-73.
Bahçeci, K. S., & Acar, J. (2007). Modeling the combined effects of pH, temperature and ascorbic acid concentration on the heat resistance of Alicyclobacillus acidoterrestis. International Journal of Food Microbiology, 120(3), 266-73.
Bahçeci KS, Acar J. Modeling the Combined Effects of pH, Temperature and Ascorbic Acid Concentration On the Heat Resistance of Alicyclobacillus Acidoterrestis. Int J Food Microbiol. 2007 Dec 15;120(3):266-73. PubMed PMID: 17936391.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modeling the combined effects of pH, temperature and ascorbic acid concentration on the heat resistance of Alicyclobacillus acidoterrestis. AU - Bahçeci,K Savaş, AU - Acar,Jale, Y1 - 2007/09/15/ PY - 2007/05/03/received PY - 2007/08/22/revised PY - 2007/09/04/accepted PY - 2007/10/16/pubmed PY - 2008/2/12/medline PY - 2007/10/16/entrez SP - 266 EP - 73 JF - International journal of food microbiology JO - Int J Food Microbiol VL - 120 IS - 3 N2 - In this study, thermal inactivation parameters (D- and z-values) of Alicyclobacillus acidoterrestris spores in McIlvaine buffers at different pH, apple juice and apple nectar produced with and without ascorbic acid addition were determined. The effects of pH, temperature and ascorbic acid concentration on D-values of A. acidoterrestris spores were also investigated using response surface methodology. A second order polynomial equation was used to describe the relationship between pH, temperature, ascorbic acid concentration and the D-values of A. acidoterrestris spores. Temperature was the most important factor on D-values, and its effect was three times higher than those of pH. Although the statistically significant, heat resistance of A. acidoterrestris spores was not so influenced from the ascorbic acid within the concentration studied. D-values in apple juice and apple nectars were higher than those in buffers as heating medium at similar pH. The D-values ranged from 11.1 (90 degrees C) to 0.7 min (100 degrees C) in apple juice, 14.1 (90 degrees C) to 1.0 min (100 degrees C) in apple nectar produced with ascorbic acid addition, and 14.4 (90 degrees C) to 1.2 min (100 degrees C) in apple nectar produced without ascorbic acid addition. However, no significant difference in z-values was observed among spores in the juices and buffers at different pH, and it was between 8.2 and 9.2 degrees C. The results indicated that the spores of A. acidoterrestris may survive in fruit juices and nectars after pasteurization treatment commonly applied in the food industry. SN - 0168-1605 UR - https://www.unboundmedicine.com/medline/citation/17936391/Modeling_the_combined_effects_of_pH_temperature_and_ascorbic_acid_concentration_on_the_heat_resistance_of_Alicyclobacillus_acidoterrestis_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0168-1605(07)00508-9 DB - PRIME DP - Unbound Medicine ER -