Effect of temperature and substrate on Pef inactivation of Lactobacillus plantarum in an orange juice-milk beverage

Fernando Sampedro, Alejandro Rivas, Dolores Rodrigo, Antonio Martínez, Miguel Rodrigo

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The inactivation kinetics of Lactobacillus plantarum in an orange juice-milk beverage treated by Pulsed Electric Fields (PEF) were studied. Experimental data were fitted to Bigelow and Hülsheger kinetic models and Weibull frequency distribution function. Results indicate that both Hülsheger model and Weibull function fit well the experimental data being Accuracy factor values (Af) closer to 1 and Mean Square Error (MSE) closer to 0. The tcw parameter of the Weibull model can be considered as a kinetic indicator as it expresses the microorganism's resistance to treatment by electric pulses. An increase in temperature favoured the inactivation of L. plantarum by PEF as reflected by a decreased in tcw value. Under the same conditions to those studied by other authors we reached less inactivation of L. plantarum in the beverage used in this study than in substrates with a simpler composition.

Original languageEnglish (US)
Pages (from-to)30-34
Number of pages5
JournalEuropean Food Research and Technology
Volume223
Issue number1
DOIs
StatePublished - May 1 2006

Fingerprint

Lactobacillus plantarum
Beverages
orange juice
beverages
inactivation
Milk
pulsed electric fields
kinetics
milk
Kinetics
Temperature
Substrates
Electric fields
inactivation temperature
temperature
Mean square error
Microorganisms
Probability density function
Distribution functions
microorganisms

Keywords

  • Inactivation
  • L. plantarum
  • Milk
  • Modelling
  • Orange juice
  • PEF

Cite this

Effect of temperature and substrate on Pef inactivation of Lactobacillus plantarum in an orange juice-milk beverage. / Sampedro, Fernando; Rivas, Alejandro; Rodrigo, Dolores; Martínez, Antonio; Rodrigo, Miguel.

In: European Food Research and Technology, Vol. 223, No. 1, 01.05.2006, p. 30-34.

Research output: Contribution to journalArticle

Sampedro, Fernando ; Rivas, Alejandro ; Rodrigo, Dolores ; Martínez, Antonio ; Rodrigo, Miguel. / Effect of temperature and substrate on Pef inactivation of Lactobacillus plantarum in an orange juice-milk beverage. In: European Food Research and Technology. 2006 ; Vol. 223, No. 1. pp. 30-34.
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