Degradation of Codium cylindricum polysaccharides by H2O2-Vc-ultrasonic and H2O2-Fe2+-ultrasonic treatment: Structural characterization and antioxidant activity

In this study, two degraded polysaccharides were obtained by H2O2-Vc-ultrasonic and H2O2-Fe2+-ultrasonic treatment from Codium cylindricum. The basic structure of polysaccharides was characterized and the relationship between structure and antioxidant activity was studied. FTIR spectrum indicated th...

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Bibliographic Details
Published in:International journal of biological macromolecules 2021-07, Vol.182, p.129-135
Main Authors: Yan, Shanglong, Pan, Chuang, Yang, Xianqing, Chen, Shengjun, Qi, Bo, Huang, Hui
Format: Article
Language:English
Subjects:
Antioxidant activity
Codium cylindricum
Degraded polysaccharide
Structural characterization
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Summary:In this study, two degraded polysaccharides were obtained by H2O2-Vc-ultrasonic and H2O2-Fe2+-ultrasonic treatment from Codium cylindricum. The basic structure of polysaccharides was characterized and the relationship between structure and antioxidant activity was studied. FTIR spectrum indicated that the degraded polysaccharides had similar functional groups (OH, CH, CO group) with ordinary polysaccharides. LC-MS analysis showed that the degraded polysaccharides were composed of the same monosaccharide units (mannose, galactose, arabinose, glucose, ribose) with Codium cylindricum polysaccharides, but the molar ratio was different. Meanwhile, the molecular weight and morphological feature of polysaccharides had been changed after degradation. Additionally, the antioxidant activity assay revealed that two degraded polysaccharides with lower molecular weight possessed better antioxidant property than ordinary polysaccharides. These results suggested that the basic structure of polysaccharides had not been damaged by two degradation methods, while the antioxidant activity was significantly enhanced.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2021.03.193