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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Antioxidant Capacities of Phenolic Compounds and Tocopherols from Tunisian Pomegranate (Punica granatum) Fruits
Journal of Food Science, Volume 76, No. 5, Year 2011
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Description
This article aims to determine the phenolic, tocopherol contents, and antioxidant capacities from fruits (juices, peels, and seed oils) of 6 Tunisian pomegranate ecotypes. Total anthocyanins were determined by a differential pH method. Hydrolyzable tannins were determined with potassium iodate. The tocopherol (α-tocopherol, γ-tocopherol, and δ-tocopherol) contents were, respectively, 165.77, 107.38, and 27.29 mg/100 g from dry seed. Four phenolic compounds were identified and quantified in pomegranate peel and pulp using the high-performance liquid chromatography/ultraviolet method: 2 hydroxybenzoic acids (gallic and ellagic acids) and 2 hydroxycinnamic acids (caffeic andp-coumaric acids). Juice, peel, and seed oil antioxidants were confirmed by ferric reducing antioxidant power (FRAP) and oxygen radical absorbance capacity (ORAC) methods. The highest values were recorded in peels with 25.63 mmol trolox equivalent/100 g and 22.08 mmol TE/100 g for FRAP and ORAC assay, respectively. Results showed that the antioxidant potency of pomegranate extracts was correlated with their phenolic compound content. In particular, the highest correlation was reported in peels. High correlations were also found between peel hydroxybenzoic acids and FRAP ORAC antioxidant capacities. Identified tocopherols seem to contribute in major part to the antioxidant activity of seed oil. The results implied that bioactive compounds from the peel might be potential resources for the development of antioxidant function dietary food. © 2011 Institute of Food Technologists ®.
Authors & Co-Authors
Walid, Elfalleh
Tunisia, Medenine
Institut Des Régions Arides
Tlili, Nizar
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Nasri, Nizar
France, Dijon
Centre Des Sciences du Goût et de L'alimentation
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Yahia, Yassine
Tunisia, Medenine
Institut Des Régions Arides
Hannachi, Hédia
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Chaira, Nizar
Tunisia, Medenine
Institut Des Régions Arides
Ma, Ying
China, Harbin
Harbin Institute of Technology
Ferchichi, Ali
Tunisia, Medenine
Institut Des Régions Arides
Statistics
Citations: 215
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1111/j.1750-3841.2011.02179.x
ISSN:
00221147
e-ISSN:
17503841
Research Areas
Food Security