化学
抗氧化剂
多糖
DPPH
羟基自由基
羧化
硫酸化
生物化学
化学改性
有机化学
色谱法
催化作用
作者
Yu-Yao Cao,Yu-Hang Ji,Ai‐Mei Liao,Jihong Huang,Kiran Thakur,Xiaoli Li,Fei Hu,Jianguo Zhang,Zhao‐Jun Wei
标识
DOI:10.1016/j.ijbiomac.2019.09.211
摘要
In this study, four sequentially extracted polysaccharides (AEPs) from Amana edulis were modified by sulphation, phosphorylation, and carboxylation modifications (S-AEPs, P-AEPs, C-AEPs), and compared for their anti-oxidant activities. After modification, sugar and protein contents were decreased and uronic acid content was increased in comparison to native AEPs. UV absorption showed similar maximum absorption peaks of modified derivatives which indicated their homogeneous nature. FTIR spectra confirmed the conversion of hydroxyl groups to OS, COO, and POH bonds, respectively. The phosphorylated derivatives (P-AEPs) displayed the highest DPPH, hydroxyl radical, and ferrous ions radical scavenging abilities. Sulfated polysaccharides (S-AEPs) were observed with high reducing ability. The C-AEPs maintained the stable antioxidant properties after carboxylation modification. Our results indicated that the chemical modification of different polysaccharide components has significantly affected their antioxidant potential for their use in food industry and human health.
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