Details

Autor(en) / Beteiligte

• Xu, Yaqin
• Niu, Xiaojie
• Liu, Ningyue
• Gao, Yankang
• Wang, Libo
• Xu, Gang
• Li, Xingguo
• Yang, Yu

Titel

Characterization, antioxidant and hypoglycemic activities of degraded polysaccharides from blackcurrant (Ribes nigrum L.) fruits

Ist Teil von

• Food chemistry, 2018-03, Vol.243, p.26-35

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2018

Quelle

MEDLINE

Beschreibungen/Notizen

• •Polysaccharides extracted from blackcurrant fruits were degraded with Fe2+-H2O2 method.•The major structure of the polysaccharides had not been obviously changed during the degraded process.•The degraded polysaccharides exhibited the higher antioxidant and hypoglycemic activities of than native polysaccharide.•The degraded sample with lower molecular weight showed the higher bioactivities. In this study, the degradation of polysaccharides from blackcurrant (BCP) was investigated. Two low-molecular-weight polysaccharides (DBCP-1, DBCP-2) were obtained using Fe2+ with different concentrations of H2O2 solution. IR spectra showed DBCPs had obvious characteristic peaks of polysaccharides. GC analysis confirmed DBCPs were composed of the same monosaccharide units as BCP but with different molar ratios. NMR analysis indicated DBCPs and BCP had similar glycosidic linkage patterns. The surface area of fragmented structure in DBCPs was reduced compared to BCP, and they had no triple helix structure. The results of bioactivity assays indicated that DBCPs exhibited higher antioxidant, α-amylase and α-glucosidase inhibitory activities than BCP, and the degraded polysaccharides with the lower molecular weight possessed higher bioactivities. These results suggested that Fe2+-H2O2 degradation did not change the main structure of polysaccharide and the degree of degradation could play a key role in the bioactivities of the polysaccharides.