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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2008, Vol. 9 Issue (5): 407-415    DOI: 10.1631/jzus.B0820002
Biochemistry     
Tannins from Canarium album with potent antioxidant activity
Liang-liang ZHANG, Yi-ming LIN
Department of Biology, School of Life Sciences, Xiamen University, Xiamen 361005, China; Research Centre for Wetlands and Ecological Engineering, Xiamen University, Xiamen 361005, China
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Abstract  The contents of total phenolics and extractable condensed tannins in the leaves, twigs and stem bark of Canarium album were determined. The structural heterogeneity of condensed tannins from stem bark was characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and nuclear magnetic resonance (NMR) analyses. The results show the predominance of signals representative of procyanidins and prodelphinidins. In addition, epicatechin and epigallocatechin polymers with galloylated procyanidin or prodelphinidin were also observed. The tannins were screened for their potential antioxidant activities using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric reducing/antioxidant power (FRAP) model systems. Tannins extracted from leaves, twigs and stem bark all showed a very good DPPH radical scavenging activity and ferric reducing power.

Key words： Canarium album      Tannins      Antioxidant capacity      Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS)     
Received: 01 January 2008     
CLC:  Q946.84  
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Liang-liang ZHANG
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Cite this article:

Liang-liang ZHANG, Yi-ming LIN. Tannins from Canarium album with potent antioxidant activity. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2008, 9(5): 407-415.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.B0820002     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2008/V9/I5/407

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