Fucoxanthin and Phenolic Contents of Six Dictyotales From the Tunisian Coasts With an Emphasis for a Green Extraction Using a Supercritical CO2 Method
| Autor: | Brahim Aoun, Cheima Mdallel, Leila Chebil Ajjabi, Leila Ktari, Saloua Sadok |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Antioxidant
antioxidant DPPH medicine.medical_treatment Science Padina pavonica Ocean Engineering supercritical carbon dioxide extraction Aquatic Science Mediterranean QH1-199.5 Oceanography fucoxanthin 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Dry weight medicine Fucoxanthin Dictyotales Food science polyphenols 030304 developmental biology Water Science and Technology 0303 health sciences Global and Planetary Change biology Extraction (chemistry) General. Including nature conservation geographical distribution biology.organism_classification chemistry Polyphenol 030220 oncology & carcinogenesis |
| Zdroj: | Frontiers in Marine Science, Vol 8 (2021) |
| ISSN: | 2296-7745 |
| DOI: | 10.3389/fmars.2021.647159/full |
| Popis: | Dictyotales, a common taxonomic group of brown seaweeds found in warm and temperate waters, are known for their richness in bioactive metabolites. In this study, six species of Dictyotales (Dictyopteris polypodioides, Dictyota dichotoma, Dictyota fasciola, Dictyota spiralis, Padina pavonica, and Taonia atomaria) collected from the Tunisian coasts were investigated for their antioxidant potentials, based on their contents of high added-value bioactive metabolites such as fucoxanthin and polyphenols. Fucoxanthin and polyphenols were analyzed quantitatively by high-performance liquid chromatography (HPLC) and UV spectrophotometer, respectively. The antioxidant property of extracts was also determined based on their ability to scavenge 2,2-Diphenyl-1-picrylhydrazyl (DPPH’s) free radical. Thus, the highest concentrations of fucoxanthin were obtained from T. atomaria and D. polypodioides (5.53 ± 1.2 and 3.43 ± 1.3 mg⋅g–1 dry weight, respectively), while the lowest amount was from D. spiralis (0.23 ± 0.1 m mg⋅g–1 dry weight). Dictyota dichotoma and T. atomaria gave the highest total phenol content (19.3 ± 0.4 and 15.2 ± 1.1 mg GAE⋅g–1 dry weight, respectively). In the second step, supercritical carbon dioxide (ScCO2) was used as a green and environmentally safe technique for the extraction of fucoxanthin from the most abundant species D. polypodioides. The extraction of fucoxanthin by ScCO2 allowed an extraction yield ranging from 0.50 ± 0.04% to 1.32 ± 0.02%, with 60°C temperature and 50-MPa pressure as the best extraction conditions. The maximum fucoxanthin and polyphenol recovery in the extract attained 15 and 64%, respectively. The results strengthen the possible use of Dictyotales from the Mediterranean Sea as a promising source of natural ingredients of health and economic interests contributing to Blue Growth in the region. |
| Databáze: | OpenAIRE |
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