Journal
JOURNAL OF FUNCTIONAL FOODS
Volume 80, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jff.2021.104439
Keywords
Jujuba pomace; Purification; Pectic polysaccharide; Partial acid hydrolysis; Antioxidant; Functional thickener
Categories
Funding
- Open Foundation of Guangxi Key Laboratory for Polysaccharide Materials and Modifications [GXPSMM208]
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU)
- Yulin City Science and Technology Plan Project [CXY2020074]
- Puredia Limited
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The study presents the first analysis of a pectic polysaccharide from Ziziphus Jujuba cv. Muzao residue and reveals its significant antioxidant activity, indicating its potential as a functional thickener as a novel food additive.
Ziziphus Jujuba cv. Muzao has attracted researchers for a long time, while residue of jujuba after extracted by water still contains many bioactivities. This paper presents the first study on in-depth structure analysis and its antioxidant of a pectic polysaccharide (PZJRP) separated and purified from Ziziphus Jujuba cv. Muzao residue through alkali extraction. Results of structural and morphological characterization according to highperformance gel-permeation chromatography, methylation analysis and partial acid hydrolysis etc. showed that PZJRP was composed of rhamnose, arabinose, glucose, galactose and galacturonic acid. Main chain of PZJRP including 1,2,4-linked rhamnose and 1,4-linked galacturonic acid, branches attached to C-4 of rhamnose, which suggested that PZJRP was a pectin polysaccharide belongs to rhamngalacturonan I type (RG-I). Significant antioxidant activity of PZJRP was revealed by protecting RAW264.7 cells against H2O2-induced oxidative stress. These findings demonstrated the potential of PZJRP to be a functional thickener as a novel food additive.
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