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Phenolic constituents from the lichen Parmotrema stuppeum (Nyl.) Hale and their antioxidant activity.

Jayaprakasha, G. K. and Jaganmohan Rao, L. (2000) Phenolic constituents from the lichen Parmotrema stuppeum (Nyl.) Hale and their antioxidant activity. Zeitschrift für Naturforschung. C, Journal of biosciences, 55 (11-12). pp. 1018-22. ISSN 0341-0382 (Submitted)

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Abstract

Lichen, Parmotrema stuppeum (P. stuppeum) was successively extracted with benzene and acetone. Both the extracts were fractionated on 1% oxalic acid impregnated silica gel column to obtain four phenolic compounds. The structures of compounds were identified by 1H and 13C NMR spectra as methyl orsenillate, orsenillic acid, atranorin and lecanoric acid respectively. Antioxidant activity of benzene extract, acetone extract and isolated compounds were evaluated in a beta-carotene-linoleate model system. The pure compounds showed moderate antioxidant activity. This is the first report on the isolation and characterisation of compounds from the lichen P. stuppeum as well as on their antioxidant activity.

Item Type: Article
Uncontrolled Keywords: phenolic acids, antioxidant activity, beta-carotene-linoleate model system
Subjects: 500 Natural Sciences and Mathematics > 10 Plants
600 Technology > 08 Food technology > 32 Antioxidants
Divisions: Human Resource Development
Plantation Products Spices and Flavour Technology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 03 Mar 2011 03:59
Last Modified: 30 Apr 2012 09:17
URI: http://ir.cftri.com/id/eprint/2141

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