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Antioxidant tannins from Syzygium cumini fruit

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Antioxidant tannins from Syzygium cumini fruit.pdf (356.8Kb)
Date
2009
Author
Zhang, Liang Liang
Lin, Yi Ming
林益明
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  • 生命科学-已发表论文 [5901]
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Abstract
Hydrolysable and condensed tannins in the fruit of Syzygium cumini were identified using NMR, MALDI-TOF MS and HPLC analyses. Hydrolysable tannins were identified as ellagitannins, consisting of a glucose core surrounded by gallic acid and ellagic acid units. Condensed tannins were identified as B-type oligomers of epiafzelechin (propelargonidin) with a degree of polymerization up to eleven. The antioxidant activity were measured by two vitro models: 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and ferric reducing/antioxidant power (FRAP). Tannins extracted from S. cumini fruit showed a very good DPPH radical scavenging activity and ferric reducing/antioxidant power. The results are promising thus indicating the utilization of the fruit of S. cumini as a significant source of natural antioxidants.
Citation
African Journal of Biotechnology Vol. 8 (10), pp. 2301–2309, 18 May 2009
URI
https://dspace.xmu.edu.cn/handle/2288/11312

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