Preparation, characterization and antioxidant activities of acetylated polysaccharides from Cyclocarya paliurus leaves

Carbohydrate Polymers
Jian-Hua XieMing-Yong Xie

Abstract

In this study, polysaccharides extracted from Cyclocarya paliurus leaves were modified to obtain its three acetylated derivatives, Ac-CP1, Ac-CP2, and Ac-CP3. The physicochemical characteristics and antioxidant activities of acetylated derivatives were investigated. The results of chemical and FT-IR spectrum analysis showed differences between acetylated derivatives and native C. paliurus polysaccharide, which revealed that the acetylation were successful. Relative to unmodified polysaccharide, the protein contents of acetylated derivatives decreased, while carbohydrate values increased. The molecular weight (Mw) of acetylated derivatives were approximately 1.05-1.09×10(6)Da and were mainly composed of Ara, Gal, Glc, Man, GalA. Ac-CP1 with relatively low degree of substitution (0.13±0.01) exhibited excellent antioxidant activity in DPPH radical assay (95.21±0.89%), and also had strong chelating activity on β-carotene-linoleic acid assay (34.64±2.07%) at 0.5mg/ml. In addition, scanning electron microscope (SEM) observations suggested that acetylation could change the morphology and structure of polysaccharides from C. paliurus leaves.

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Citations

Feb 20, 2016·International Journal of Biological Macromolecules·Yunfei XuJi Zhang
Jul 6, 2016·International Journal of Biological Macromolecules·Fan ZhangJianhua Xie
Sep 19, 2019·Oxidative Medicine and Cellular Longevity·Xiang LiWen-Jun Wang
May 26, 2017·Annals of the New York Academy of Sciences·Qiqiong LiMing-Yong Xie
Feb 8, 2019·Oxidative Medicine and Cellular Longevity·Zheng Feei MaYifan Zhu
Aug 10, 2020·Biochimica Et Biophysica Acta. Molecular Basis of Disease·Mohammad Amin DehghaniMasoud Mahdavinia
Jan 9, 2021·International Journal of Biological Macromolecules· Meng-ZhaoWenjun Wang
Mar 28, 2021·International Journal of Biological Macromolecules·Ting ChenMeiyun Zhang
Feb 25, 2019·International Journal of Biological Macromolecules·Fernanda Matoso SombraRegina Célia Monteiro de Paula
Jul 15, 2021·Critical Reviews in Food Science and Nutrition·He LiuDanshi Zhu

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