Improved Extraction Efficiency of Antioxidant Bioactive Compounds from Tetraselmis chuii and Phaedoactylum tricornutum Using Pulsed Electric Fields

Pulsed electric fields (PEF) is a promising technology that allows the selective extraction of high-added value compounds by electroporation. Thus, PEF provides numerous opportunities for the energy efficient isolation of valuable microalgal bioactive substances (i.e., pigments and polyphenols). The...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2020-08, Vol.25 (17), p.3921
Main Authors: Kokkali, Marialena, Martí-Quijal, Francisco J, Taroncher, Mercedes, Ruiz, María-José, Kousoulaki, Katerina, Barba, Francisco J
Format: Article
Language:English
Subjects:
Algae
antioxidant bioactive compounds
Antioxidants
Antioxidants - isolation & purification
Aquatic microorganisms
Bioactive compounds
Biological activity
Carotenoids
Chlorophyll
Chlorophyta - chemistry
Diatoms - chemistry
Dimethyl sulfoxide
Efficiency
Electric fields
Electroporation
Energy efficiency
extraction
Microalgae - chemistry
Phaeodactylum tricornutum
Pigments
Polyphenols
Polyphenols - isolation & purification
pulsed electric fields
Solvents
Tetraselmis chuii
Variance analysis
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Summary:Pulsed electric fields (PEF) is a promising technology that allows the selective extraction of high-added value compounds by electroporation. Thus, PEF provides numerous opportunities for the energy efficient isolation of valuable microalgal bioactive substances (i.e., pigments and polyphenols). The efficiency of PEF-assisted extraction combined with aqueous or dimethyl sulfoxide (DMSO) solvents in recovering pigments and polyphenols from microalgae ( ) and ( ) was evaluated. Two PEF treatments were applied: (1 kV/cm/400 pulses, 3 kV/cm/45 pulses), with a specific energy input of 100 kJ/kg. The total antioxidant capacity (TAC) was positively influenced by the use of DMSO. The highest TAC in the culture was achieved at a lower extraction time and electric field than for . The use of DMSO only improved the polyphenols' extraction for whereas the PEF and extraction time were more important for . Carotenoids and chlorophyll a were more efficiently extracted using DMSO, while chlorophyll b levels were higher following aqueous extraction for both microalgae. In the TAC and pigment extraction efficiency were in general higher at lower extraction times. It can be concluded that PEF may be a promising alternative for the enhancement of the selective extraction of antioxidant bioactive compounds from microalgae.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules25173921