Exploitation of polyphenol-rich pine barks for potent antioxidant activity
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The phenolic composition of pine bark from a variety of Pinus species was estimated by measuring Klason lignin, acid-soluble lignin, and a 1% NaOH extract. Polyphenol contents of hot water extracts from pine bark were determined by the Folin-Ciocalteu assay and the vanillin-H2SO4 assay. Among the pine bark varieties investigated, Pinus radiata bark showed the highest polyphenol content and potent antioxidant activity. Pinus rigida bark was also a usable polyphenol-rich source, whereas Pinus densiflora bark had a low yield (5.1%) of hot water extract, although it showed potent antioxidant activity. Correlations between proanthocyanidin content in pine bark and antioxidant activity were observed. The results suggested that proanthocyanidin was the crucial contributor to potent antioxidant activity in pine bark.
Key wordsPine bark Polyphenol Antioxidant activity Proanthocyanidin
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- 1.Hassan EBM, Mun SP (2002) Liquefaction of pine bark using phenol and lower alcohols with methanesulfonic acid catalyst. J Ind Eng Chem 8:359–364Google Scholar
- 14.Technical Association of the Pulp and Paper Industry (TAPPI) (1992) Test methods T1-T1209. TAPPI, AtlantaGoogle Scholar
- 15.Zhang D, Hamauzu Y (2004) Phenolic compounds and their antioxidant properties in different tissues of carrots (Daucus carota L.). Food Agric Environ 2:95–100Google Scholar
- 17.Mozetič B, Tomažič I, Škvarč A, Trebše P (2006) Determination of polyphenols in white grape berries cv. Rebula. Acta Chim Slov 53:58–64Google Scholar
- 21.Mun SP, Ku CS (2006) Characterization of low molecular weight polyphenols from pine (Pinus radiata) bark. Food Sci Biotechnol 15:424–430Google Scholar