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Effect of Post-extraction Ultrasonication on Compositional Features and Antioxidant Activities of Extracts Obtained After Sequential Enzymatic/Alkaline Treatment of the Red Seaweed Palmaria palmata
Ghelichi, S.; Sørensen, A.-D.M.; Hajfathalian, M.; Jacobsen, C. Effect of Post-Extraction Ultrasonication on Compositional Features and Antioxidant Activities of Enzymatic/Alkaline Extracts of Palmaria palmata. Mar. Drugs2024, 22, 179.
Ghelichi, S.; Sørensen, A.-D.M.; Hajfathalian, M.; Jacobsen, C. Effect of Post-Extraction Ultrasonication on Compositional Features and Antioxidant Activities of Enzymatic/Alkaline Extracts of Palmaria palmata. Mar. Drugs 2024, 22, 179.
Ghelichi, S.; Sørensen, A.-D.M.; Hajfathalian, M.; Jacobsen, C. Effect of Post-Extraction Ultrasonication on Compositional Features and Antioxidant Activities of Enzymatic/Alkaline Extracts of Palmaria palmata. Mar. Drugs2024, 22, 179.
Ghelichi, S.; Sørensen, A.-D.M.; Hajfathalian, M.; Jacobsen, C. Effect of Post-Extraction Ultrasonication on Compositional Features and Antioxidant Activities of Enzymatic/Alkaline Extracts of Palmaria palmata. Mar. Drugs 2024, 22, 179.
Abstract
P. palmata is a viable source of nutrients with bioactive properties. The present study determined the potential role of post-extraction ultrasonication on some compositional features and antioxidant properties of resulting extracts after sequential enzymatic/alkaline treatment. No significant difference was detected in terms of protein content and recovery as well as amino acid composition of the extracts. The nitrogen-to-protein conversion factor of 5 was found to be too high for the seaweed and its enzymatic/alkaline extracts. The extracts sonicated by bath for 10 minutes and not sonicated showed the highest and lowest total phenolic contents (p<0.05), respectively. The highest radical scavenging and lowest metal chelating activities were observed for the non-sonicated sample, as evidenced by IC50 values. The extract sonicated by bath for 10 minutes showed the most favorable in vitro antioxidant properties since its radical scavenging was not significantly different from that of not sonicated sample (p>0.05), whereas its metal chelating activity was significantly higher (p<0.05). To conclude, post-extraction ultrasonication by an ultrasonic bath for 10 minutes is recommended to increase phenolic content and improve antioxidant properties of enzymatic-alkaline extracts from P. palmata.
Keywords
Palmaria palmata; enzymatic/alkaline extraction; protein hydrolysate; post-extraction ultrasonication; antioxidant activity.
Subject
Biology and Life Sciences, Food Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
