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	Characterization and antioxidative properties of condensed tannins from the mangrove plant Aegiceras corniculatum
	Wei, Shu-Dong ; Lin, Yi-Ming ; Lin YM(林益明) ; Liao, Meng-Meng ; Zhou, Hai-Chao ; Li, Yuan-Yue
	2012-05-05
关键词	Aegiceras corniculatum condensed tannins MALDI-TOF MS degree of polymerization antioxidant activity
英文摘要	Freeze-dried leaf, stem bark, and root bark powders of Aegiceras corniculatum were extracted with three different types of polar solvents: methanol, ethyl acetate, and water. The methanol extracts had the highest concentrations in total phenolics and extractable condensed tannins, followed by water and ethyl acetate extracts. Analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) suggested that condensed tannins from leaf, stem bark, and root bark contained prodelphinidins and procyanidins, with the predominance of prodelphinidins and high level of galloylation. Acid-catalyzed degradation in the presence of benzyl mercaptan indicated that gallocatechin, epigallocatechin, epigallocatechin-3-O-gallate, and epicatechin-3-O-gallate occurred as the terminal units and (epi)gallocatechin, (epi)gallocatechin-3-O-gallate, (epi)catechin, and (epi)catechin-3-O-gallate occurred as the extension units. The mean degrees of polymerization (mDP) of condensed tannins from leaf, stem bark, and root bark were 13.5, 7.4, and 12.3, respectively. The condensed tannins from leaf and stem bark exhibited a higher DPPH radical scavenging activity and ferric reducing/antioxidant power compared to that of synthetic antioxidant butylated hydroxyanisole (BHA). (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012; National Natural Science Foundation of China [31070522]; Program for New Century Excellent Talents in University [NCET-07-0725]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
语种	英语
出版者	WILEY-BLACKWELL
内容类型	期刊论文
源URL	[http://dx.doi.org/10.1002/app.35258]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Wei, Shu-Dong,Lin, Yi-Ming,Lin YM,et al. Characterization and antioxidative properties of condensed tannins from the mangrove plant Aegiceras corniculatum[J],2012.
APA	Wei, Shu-Dong,Lin, Yi-Ming,林益明,Liao, Meng-Meng,Zhou, Hai-Chao,&Li, Yuan-Yue.(2012).Characterization and antioxidative properties of condensed tannins from the mangrove plant Aegiceras corniculatum..
MLA	Wei, Shu-Dong,et al."Characterization and antioxidative properties of condensed tannins from the mangrove plant Aegiceras corniculatum".(2012).

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