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Optimization of ultrasound-assisted extraction of bioactive compounds from Pelvetia canaliculata to sunflower oil
ID Sousa, Gabriela (Author), ID Trifunovska, Marija (Author), ID Antunes, Madalena (Author), ID Miranda, Isabel (Author), ID Moldão, Margarida (Author), ID Alves, Vítor (Author), ID Vidrih, Rajko (Author), ID Lopes, Paula Allen (Author), ID Aparicio, Luis (Author), ID Neves, Marta (Author), ID Tecelão, Carla (Author), ID Ferreira-Dias, Suzana (Author)

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Abstract
In this study, Pelvetia canaliculata L. macroalga, collected from the Atlantic Portuguese coast, was used as a source of bioactive compounds, mostly antioxidants, to incorporate them in sunflower oil with the aim of increasing its biological value and oxidative stability. The lyophilized alga was added to the oil, and ultrasound-assisted extraction (UAE) was performed. Algae concentration and UAE time varied following a central composite rotatable design (CCRD) to optimize extraction conditions. The following parameters were analyzed in the oils: oxidation products, acidity, color, chlorophyll pigments, carotenoids, flavonoids, total phenolic content, antioxidant activity by DPPH (2,2-diphenyl-1-picrylhydrazyl) and FRAP (ferric reducing antioxidant power) assays, and sensory analysis. Extraction conditions did not affect the acidity and the amount of oxidation products in the oil. Chlorophylls and carotenoid contents increased with algae concentration, while flavonoid extraction did not depend on algae content or UAE time. Total phenolics in the oil were highly related only to FRAP antioxidant activity. Storage experiments of supplemented oil (12.5% algae; 20 min UAE) were carried out under accelerated oxidation conditions at 60 °C/12 days. Antioxidant activity (FRAP) of supplemented oil was 6-fold higher than the value of non-supplemented oil. Final samples retained 40% of their initial antioxidant activity. The presence of algae extracts contributed to the increased oxidative stability of sunflower oil.

Language:English
Keywords:algae, antioxidants, bioactive compounds, oxidative stability, Pelvetia canaliculata, response surface methodology, sunflower oil, ultrasound-assisted extraction
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:20 str.
Numbering:Vol. 10, iss. 8, art. 1732
PID:20.500.12556/RUL-136012 This link opens in a new window
UDC:664.3.094.3.097.8:582.27
ISSN on article:2304-8158
DOI:10.3390/foods10081732 This link opens in a new window
COBISS.SI-ID:72211971 This link opens in a new window
Publication date in RUL:06.04.2022
Views:889
Downloads:139
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Record is a part of a journal

Title:Foods
Shortened title:Foods
Publisher:MDPI
ISSN:2304-8158
COBISS.SI-ID:512252472 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.08.2021

Secondary language

Language:Slovenian
Keywords:alge, Pelvetia canaliculata, bioaktivne spojine, antioksidanti, sončnično olje, oksidativna stabilnost

Projects

Funder:Other - Other funder or multiple funders
Funding programme:Portugal, Direção-Geral de Política do Mar, Fundo Azul
Project number:FA_05_2017_013
Name:Integrated approach for seaweeds application as sustainable source of functional compounds for edible oils stabilization and food processing
Acronym:Ocean2Oils

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