Academic Journal
Combination of supercritical CO2 and high-power ultrasound for the inactivation of fungal and bacterial spores in lipid emulsions
| Title: | Combination of supercritical CO2 and high-power ultrasound for the inactivation of fungal and bacterial spores in lipid emulsions |
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| Authors: | Angela Gomez-Gomez, Edmundo Brito-de la Fuente, Críspulo Gallegos, Jose V. Garcia-Perez, Jose Benedito |
| Source: | Ultrasonics Sonochemistry, Vol 76, Iss , Pp 105636- (2021) |
| Publisher Information: | Elsevier, 2021. |
| Publication Year: | 2021 |
| Collection: | LCC:Chemistry LCC:Acoustics. Sound |
| Subject Terms: | Spores, Inactivation, Supercritical fluids, Ultrasound, Emulsions, Chemistry, QD1-999, Acoustics. Sound, QC221-246 |
| More Details: | For the first time, this study addresses the intensification of supercritical carbon dioxide (SC-CO2) treatments using high-power ultrasound (HPU) for the inactivation of fungal (Aspergillus niger) and bacterial (Clostridium butyricum) spores in oil-in-water emulsions. The inactivation kinetics were analyzed at different pressures (100, 350 and 550 bar) and temperatures (50, 60, 70, 80, 85 °C), depending on the microorganism, and compared to the conventional thermal treatment. The inactivation kinetics were satisfactorily described using the Weibull model.Experimental results showed that SC-CO2 enhanced the inactivation level of both spores when compared to thermal treatments. Bacterial spores (C. butyricum) were found to be more resistant to SC-CO2 + HPU, than fungal (A. niger) ones, as also observed in the thermal and SC-CO2 treatments. The application of HPU intensified the SC-CO2 inactivation of C. butyricum spores, e.g. shortening the total inactivation time from 10 to 3 min at 85 °C. However, HPU did not affect the SC-CO2 inactivation of A. niger spores. The study into the effect of a combined SC-CO2 + HPU treatment has to be necessarily extended to other fungal and bacterial spores, and future studies should elucidate the impact of HPU application on the emulsion’s stability. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1350-4177 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S1350417721001784; https://doaj.org/toc/1350-4177 |
| DOI: | 10.1016/j.ultsonch.2021.105636 |
| Access URL: | https://doaj.org/article/b40caa12d0af49959570e09d76b5ee52 |
| Accession Number: | edsdoj.b40caa12d0af49959570e09d76b5ee52 |
| Database: | Directory of Open Access Journals |
| ISSN: | 13504177 |
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| DOI: | 10.1016/j.ultsonch.2021.105636 |
| Published in: | Ultrasonics Sonochemistry |
| Language: | English |