Effect of Pulsed Electric Fields on the Growth and Acidification Kinetics of Lactobacillus delbrueckii Subsp. bulgaricus
| Autor: | Mohamed Koubaa, Eugène Vorobiev, Kaidi Peng, Olivier Bals |
|---|---|
| Přispěvatelé: | Transformation Intégrée de la Matière Renouvelable (TIMR), Université de Technologie de Compiègne (UTC), ESCOM - Ecole Supérieure de Chimie Organique et Minérale (ESCOM), Université de Technologie de Compiègne (UTC)-Université de Technologie de Compiègne (UTC) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Specific growth [SDV.BIO]Life Sciences [q-bio]/Biotechnology Health (social science) [SDV]Life Sciences [q-bio] Kinetics Plant Science lcsh:Chemical technology 01 natural sciences Health Professions (miscellaneous) Microbiology Article Absorbance 0404 agricultural biotechnology immune system diseases 010608 biotechnology Electric field Lactobacillus growth kinetic [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering lcsh:TP1-1185 Food science fermentation Lactobacillusdelbrueckii subsp. bulgaricus CFL1 biology Chemistry food and beverages 04 agricultural and veterinary sciences respiratory system biology.organism_classification 040401 food science Accelerated Growth respiratory tract diseases pulsed electric fields acidification activity Fermentation Lactobacillus delbrueckii subsp. bulgaricus CFL1 [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition Lactobacillus delbrueckii subsp. bulgaricus Food Science circulatory and respiratory physiology |
| Zdroj: | Foods Volume 9 Issue 9 Foods, Vol 9, Iss 1146, p 1146 (2020) Foods, MDPI, 2020, 9 (9), pp.1146. ⟨10.3390/foods9091146⟩ |
| ISSN: | 2304-8158 |
| DOI: | 10.3390/foods9091146 |
| Popis: | The aim of this work was to investigate the effect of pulsed electric fields (PEF) on the growth and acidification kinetics of Lactobacillus delbrueckii subsp. bulgaricus CFL1 during fermentation. The PEF treatments were applied during the fermentation process using a recirculation pump and a PEF treatment chamber coupled with a PEF generator. The medium flow rate through the chamber was first optimized to obtain the same growth and acidification kinetics than the control fermentation without medium recirculation. Different PEF intensities (60&ndash 428 V cm&minus 1) were then applied to the culture medium to study the impact of PEF on the cells&rsquo behavior. The growth and acidification kinetics were recorded during the fermentation and the specific growth rates µ pH, and acidification rate (dpH/dt) were assessed. The results obtained showed a biphasic growth by applying high PEF intensities (beyond 285 V cm&minus 1) with the presence of two maximal specific growth rates and a decrease in the acidification activities. It was demonstrated that the cells were stressed during the PEF treatment, but presented an accelerated growth after stopping it, leading thereby to similar absorbance and pH at the end of the fermentation. These results show the great potential of PEF technology to be applied to generate low acidified products by performing PEF-assisted fermentations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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