Degradation of sulphated polysaccharides from Grateloupia livida and antioxidant activity of the degraded components
文献类型： 外文期刊
作者： Chen, Shengjun 1 ; Liu, Huan 1 ; Yang, Xianqing 1 ; Li, Laihao 1 ; Qi, Bo 1 ; Hu, Xiao 1 ; Ma, Haixia 1 ; Li, Chunsheng 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Natl Res & Dev Ctr Aquat Prod Proc, South China Sea Fisheries Res Inst, Key Lab Aquat Prod Proc,Minist Agr & Rural Affair, Guangzhou 510300, Peoples R China
2.Jiangsu Ocean Univ, Coinnovat Ctr Jiangsu Marine Bioind Technol, Lianyungang 222005, Peoples R China
3.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China
关键词： Degradation; Polysaccharide; Grateloupia livida; Antioxidant activity
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）
ISSN： 0141-8130
年卷期： 2020 年 156 卷
页码：
收录情况： SCI
摘要： Degradation of sulphated polysaccharides from Grateloupia livida (GLP) was studied using H2O2-Vc combined with microwave treatment. Optimal conditions were determined after the Box-Behnken response surface analysis. The best degradation conditions were as follows: microwave power 250 W. microwave temperature 54 degrees C, the concentration of H2O2 3 mM, degradation time 33 min. Under these conditions, the DPPH scavenging activity of the degraded GLP (DGLP) was 71.39 +/- 0.17% at a concentration of 6.0 mg/mL. The degradation method is fast and effective, which is beneficial to improve the antioxidant activity of polysaccharides. Two sulphated polysaccharide constituents (DGLP-1 and DGLP-2) were isolated from DGLP and characterized, and their antioxidant activities were determined. The two polysaccharides had high sulphate content (sulphate content: 25.18-25.26%), contained galactose as the major monosaccharide, and had molecular weights of 158.49 +/- 0.43 and 18.06 +/- 0.92 kDa, respectively. Antioxidant assays suggested that DGLP-1 and especially DGLP-2 possessed good antioxidant properties. (C) 2020 Elsevier B.V. All rights reserved.
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