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Chroma [(a*2 + b*2)1/2], that quantifies the intensity of color, is higher in the pasteurized orange juice (57.63 ¡À 0.55), followed by HIPEF juice (53.70 ¡À 0.57) and finally by the untreated juice (50.93 ¡À 0.69). A similar observation in increases in chroma (increases in brightness) due to the pasteurization of orange juice has been described by Lee and Coates (2003) and Sa¡änchez-Moreno et al.(2005). During refrigerated storage of the samples analyzed in the present study, color intensity decrease because chroma (C*) decrease (Fig. 3). Other authors describe similar results after refrigerated storage of orange juice (Choi,Kim, & Lee, 2002) or after frozen storage of red grapefruit juice concentrates (Lee & Coates, 2002).

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