[Efficacy of disinfection treatments using essential oils and ultrasound on tomato fruits inoculated with Escherichia coli and impact on antioxidant activity]. / Eficiencia de la desinfección con aceites esenciales y ultrasonido sobre Escherichia coli inoculada en frutos de tomate y el impacto sobre la actividad antioxidante.
Rev Argent Microbiol
; 47(3): 251-5, 2015.
Article
em Es
| MEDLINE
| ID: mdl-26323374
Fresh produce often harbors a great number of microorganisms; hence, its growing demand may constitute a risk for consumers. The aim of this study was to evaluate the efficacy of several disinfection procedures against enterotoxigenic Escherichia coli (ETEC) inoculated on tomato fruits and the conservation of the antioxidant properties of these disinfected fruits. Fruits were immersed for 5 or 10min in oregano or thyme essential oil dispersions (5, 10ppm), with or without ultrasound treatment. Antioxidant activity of disinfected fruits was determined as the ability to scavenge 2,2-diphenyl-1-pricrylhydrazyl (DPPH) radicals and was reported as percentage of inhibition (%I). The most efficient disinfectant treatments showing significant differences (p≤.05) between the reductions log10 CFU/g (S) of ETEC were those using 10ppm oregano for 10min, with S=3.05 in individual treatments and S=4.03 in mixed treatments. The highest %I was obtained with individual sonication treatments (69.52 and 72.48), while in combined treatments the %I values increased with thyme oil 5ppm and ultrasound for 5min (51.27%) and 10min (53.31%).
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sonicação
/
Óleos de Plantas
/
Óleos Voláteis
/
Desinfecção
/
Solanum lycopersicum
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Origanum
/
Thymus (Planta)
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Escherichia coli Enterotoxigênica
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Antioxidantes
Tipo de estudo:
Evaluation_studies
Idioma:
Es
Revista:
Rev Argent Microbiol
Ano de publicação:
2015
Tipo de documento:
Article
País de publicação:
Argentina