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Advisor(s)
Abstract(s)
Crithmum maritimum L., or sea fennel, is an edible halophyte plant, rich in phenolic compounds
with antioxidant and antimicrobial activities, that naturally grows in Mediterranean coasts.
This study aims to incorporate bioactive compounds extracted from lyophilized Crithmum maritimum
to sunflower oil assisted by ultrasounds (UAE), to improve its biological value and oxidative stability.
UAE conditions were optimized as a function of time (5–20 min) and lyophilized plant concentration
(5–20% m/v). The experiments were dictated by a central composite rotatable matrix. Oxidation
products were not influenced by UAE conditions. Acidity, chlorophyll, and carotenoid contents were
affected by both factors, while total phenols, flavonoids, and antioxidant activity (FRAP method)
only increased with plant concentration. Response surfaces were fitted to these experimental results.
Flavonoids were highly related with oil antioxidant activity. No sensory defects were detected in
supplemented oil (12.5% m/v plant/5 min UAE). The oxidative stability of this oil was evaluated
at 60 C/12 days. Chlorophylls, phenols, radical scavenging (DPPH), and antioxidant activities
decreased over time but were always higher than the values in non-supplemented oil (8.6 and 7-fold
with FRAP and DPPH, respectively). C. maritimum presented high amounts of bioactive compounds
with antioxidant activity, adequate for sunflower oil supplementation by UAE
Description
Keywords
antioxidant activity flavonoids halophyte optimization phenolic compounds pigments response surface methodology sea fennel
Pedagogical Context
Citation
Sousa, G.; Alves, M.I.; Neves, M.; Tecelão, C.; Ferreira-Dias, S. Enrichment of Sunflower Oil with Ultrasound-Assisted Extracted Bioactive Compounds from Crithmum maritimum L. Foods 2022, 11, 439
Publisher
MDPI