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Antioxidant activitiesof roselle (Hibiscus sabdariffa) calyces and fruit extracts

Ramakrishna, B. V. and Jayaprakasha, G. K. and Jena, B. S. and Singh, R. P. (2008) Antioxidant activitiesof roselle (Hibiscus sabdariffa) calyces and fruit extracts. Journal of Food Science and Technology, 45 (3). pp. 223-227.

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Antioxidant rich fractions were extracted from roselle (Hibiscus sabdariffa) calyces and fruits using ethyl acetate,acetone and methanol. The extracts were screened for antioxidant property using α, α-diphenyl-β-picryl hydrazyl (DPPH)and ß-carotene-linoleate model systems. The ethyl acetate (EtOAc), acetone, methanol (MeOH) extracts of calyces and butylated hydroxyanisole (BHA) showed 89.4, 82.97, 91.4 and 91.1% antioxidant activity (AA) with DPPH and 82.6, 76.9,85.4 and 91.4% using ß-carotene-linoleate model systems, respectively at 500 ppm. The methanolic extract of the calyces showed highest reducing power. However, the fruit extracts showed comparatively lower activities as compared to calycesextracts. Owing to higher AA of the extracts of calyces, these were selected to study their effect on lipid peroxidation. At 500 ppm, the ethyl acetate, acetone and methanol extracts of calyces showed 29.2, 34.1 and 48.6% inhibition of lipid peroxidation in rat liver homogenates using thiobarbituric acid (TBA) method. The studies can be further extended to exploit their possible application for the preservation of food products as well as health supplement and nutraceuticals.

Item Type: Article
Uncontrolled Keywords: Roselle, Hibiscus sabdariffa, Phenolics, Antioxidant activity, ß-Carotene-linoleate model system, α, α- Diphenyl-ß-picryl hydrazyl, Lipid peroxidation
Subjects: 500 Natural Sciences and Mathematics > 10 Plants > 06 Trees And Shrubs
600 Technology > 08 Food technology > 32 Antioxidants
Divisions: Human Resource Development
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 06 Jun 2008 09:48
Last Modified: 01 Oct 2018 10:40
URI: http://ir.cftri.res.in/id/eprint/1749

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