4.7 Article

Ultrasonic-microwave-assisted extraction for enhancing antioxidant activity of Dictyophora indusiata polysaccharides: The difference mechanisms between single and combined assisted extraction

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ULTRASONICS SONOCHEMISTRY
卷 95, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.ultsonch.2023.106356

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Dictyophora indusiata; Polysaccharides; Extraction; Response surface; Structures; Antioxidant

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The purpose of this study was to investigate the effects of different extraction methods on the yield, chemical structures and antioxidant activity of Dictyo-phora indusiata polysaccharides. The results showed that ultrasonic-microwave-assisted extraction (UMAE) had the greatest damage to the cell wall of the polysaccharides and the best comprehensive antioxidant capacity. Different extraction methods had no significant effect on the types of glycosidic bonds and sugar rings, but there were differences in absolute molecular weight and molecular conformation. UMAE had the highest polysaccharides yield, indicating its potential for modification and application in the functional food industry.
The purpose of this study is to investigate the effects of different extraction methods (hot water-assisted extraction (HWE), microwave-assisted extraction (MAE), ultrasonic-assisted extraction (UAE), and ultrasonic- microwave-assisted extraction (UAME)) on the yield, chemical structures and antioxidant activity of Dictyo-phora indusiata polysaccharides (DPs). The research results showed that UMAE treatment had greater degree of damage to the cell wall of DPs and better comprehensive antioxidant capacity. Different extraction methods had no obvious effect on the types of glycosidic bonds and sugar rings, similar chemical composition and mono-saccharide composition, with different absolute molecular weight (Mw) and molecular conformation. In particular, DPs for UMAE method had the highest polysaccharides yield, which was related to the conformational stretching and degradation avoidance of DPs in the higher molecular weight components under the simultaneous action of microwave and ultrasonic. These findings suggest that the UMAE technology has good potential for modification and application of DPs in the functional food industry.

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