Abstract:Pitaya, or dragon fruit, (Hylocereus polyrhizus) contains in its pulp and peel a high concentration of phenolic compounds, flavonoids and high antioxidant activity. The pulp is used in industries and the peel can be a source of bioactive compounds. The aim of this study was to optimize the extraction of phenolic compounds from pitaya peel flour, dried through freeze-drying. Thus, a central composite rotatable design (CCRD) was performed with two variables (X 1 = ethanol percentage, of 0-100% as extraction solv… Show more
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