Evaluation of pulsed electric fields technology for the improvement of subsequent carotenoid extraction from dried Rhodotorula glutinis yeast

•PEF and subsequent aqueous incubation improved carotenoid extraction from dried yeast.•PEF triggers effects occurring during incubation beyond membrane electroporation.•Ethanol was the most efficient solvent, recovering 80% of carotenoid content.•Torularhodin esters constituted the main carotenoid...

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Bibliographic Details
Published in:Food chemistry 2020-09, Vol.323, p.126824-126824, Article 126824
Main Authors: Martínez, J.M., Schottroff, F., Haas, K., Fauster, T., Sajfrtová, M., Álvarez, I., Raso, J., Jaeger, H.
Format: Article
Language:English
Subjects:
Carotenoids
Extraction
PEF
Rhodotorula
Supercritical fluids
Torularhodin
Yeast
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Summary:•PEF and subsequent aqueous incubation improved carotenoid extraction from dried yeast.•PEF triggers effects occurring during incubation beyond membrane electroporation.•Ethanol was the most efficient solvent, recovering 80% of carotenoid content.•Torularhodin esters constituted the main carotenoid found in the extracts. This research aims to evaluate whether the electroporation of Rhodotorula glutinis fresh biomass improved the subsequent extraction of carotenoids from dry biomass using supercritical CO2 and traditional solvent extraction. Supercritical CO2 extraction yields were low after all treatments assayed. Similarly, solvent extraction of carotenoids from untreated or PEF treated cells that were immediately freeze-dried after the pre-treatment was neither effective (extraction yield 
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2020.126824