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Chromatograms of free phenolic compounds identified of fresh rocket leaves byproduct (RF) and during the pulps freezing (RM0, RM3, RM6, corresponding to 24 h after freezing and month 3 and 6 of freezing, respectively) and drying storage (DM0, DM2, DM6, corresponding to month 0, 2 and 6 of drying storage) at a wavelength of 320 nm. * = derivative.
