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Fruits and flower edible petals rich in polyphenolic compounds, in particular anthocyanins are known for their pharmacological properties. In order to recover high amounts of such biomolecules from their matrix, various extraction conditions should be conducted. In the present paper, flower petals of Hibiscus sabdariffa and fruits of Ribes nigrum were irradiated with UV-C light for different times (10 and 20 minutes) and at different distances (20, 30, 40, 50 and 60 cm) with the objective to study its effect on pl...