a b s t r a c t
Nowadays consumers demand fresh-cut fruits free from additives and with appealing appearance. High
pressure processing (HPP) could be a suitable alternative to preserve fresh-cut fruit, since it is less
aggressive than thermal treatments. This work was accomplished to study the effect of HPP in combination
with vacuum packaging (VP) on the preservation of fresh-cut peaches. Cubes of peaches were
treated with a solution of ascorbic acid and citric acid to inhibit enzymatic browning and then subjected
to: A) VP þ HPP (500 MPa-5 min), B) only VP and C) Control. Immediately after processing, after 15 and
21 days, different evaluations were carried out over the samples: chromatic parameters (CIE L*C*h),
polyphenoloxidase (PPO) activity, Textural Profile Analysis, and ethanol content. During the period
evaluated, L* and C* were significantly lower in vacuum-packed and pressurized samples than in the
control. At day 21, the pressurized samples showed the best textural properties. Peaches subjected to
HPP þ VP also had significantly lower content of ethanol and PPO activity than the other treatments,
which evidences that fermentation and browning were successfully inhibited by this combination. It can
be concluded that HPP þ VP could preserve fresh-cut peaches for at least 21 days at 10 C, with only a
slight translucency caused by VP.
a b s t r a c tNowadays consumers demand fresh-cut fruits free from additives and with appealing appearance. Highpressure processing (HPP) could be a suitable alternative to preserve fresh-cut fruit, since it is lessaggressive than thermal treatments. This work was accomplished to study the effect of HPP in combinationwith vacuum packaging (VP) on the preservation of fresh-cut peaches. Cubes of peaches weretreated with a solution of ascorbic acid and citric acid to inhibit enzymatic browning and then subjectedto: A) VP þ HPP (500 MPa-5 min), B) only VP and C) Control. Immediately after processing, after 15 and21 days, different evaluations were carried out over the samples: chromatic parameters (CIE L*C*h),polyphenoloxidase (PPO) activity, Textural Profile Analysis, and ethanol content. During the periodevaluated, L* and C* were significantly lower in vacuum-packed and pressurized samples than in thecontrol. At day 21, the pressurized samples showed the best textural properties. Peaches subjected toHPP þ VP also had significantly lower content of ethanol and PPO activity than the other treatments,which evidences that fermentation and browning were successfully inhibited by this combination. It canbe concluded that HPP þ VP could preserve fresh-cut peaches for at least 21 days at 10 C, with only aslight translucency caused by VP.
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