Abstract
The shelf life of minimally processed fresh (MPF) pears is affected by raw material characteristics and production factors. This study evaluated the effect of raw material storage (3 months in regular atmosphere [RA], 3 and 6 months in controlled atmosphere [CA]) on the organoleptic and functional quality of MPF pears packaged in polypropylene (PP) and low-density polyethylene (LDPE) for 0, 10, and 15 days at 0 °C. Wedges from 3-month CA showed the lowest respiratory activity (about 8.31 mg CO2 kg−1 h−1), and those from 6-mounth CA maintained higher firmness after 15 days. Lightness decreased during storage, less so in harvest samples, which also showed less browning. Nevertheless, polyphenol oxidase (PPO) activity increased fivefold after 15 days. Total polyphenol content decreased by about 50% during storage. Wedges in PP packaging exhibited higher total antioxidant capacity (TAC) measured by DPPH than those in LDPE (15.55 and 13.77 mg EAA 100 g−1 FW, respectively). In both, the contents were reduced after 15 days (15–38%). No differences in TAC were observed in the FRAP assay, where values remained unchanged. Significant correlations between PPO activity, TAC, and color variables suggest ongoing oxidative processes. In contrast to the effect of raw material storage, the type of packaging did not significantly affect any of the measured variables.
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Claims 11
Claim · model-written summary
Wedges from three-month controlled-atmosphere storage had the lowest respiration, about 8.31 mg CO2 kg−1 h−1.
- Treatment
- 3-month CAe0
- Outcome
- respiratory activitye0
- Direction
- loweste0
- Value
- about 8.31 mg CO2 kg−1 h−1e0
PyrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wedges from 3-month CA showed the lowest respiratory activity (about 8.31 mg CO2 kg−1 h−1)”
t0“Pears”
Claim · model-written summary
Wedges from six-month controlled-atmosphere storage retained higher firmness after 15 days.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those from 6-mounth CA maintained higher firmness after 15 days”
t0“Pears”
Claim · model-written summary
Lightness declined during storage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lightness decreased during storage”
t0“Pears”
Claim · model-written summary
Harvest-sample wedges had less lightness decline and browning.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less so in harvest samples, which also showed less browning”
t0“Pears”
Claim · model-written summary
Polyphenol oxidase activity increased fivefold after 15 days.
- Outcome
- polyphenol oxidase (PPO) activitye0
- Direction
- increasede0
- Value
- fivefolde0
- Qualifier
- after 15 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“polyphenol oxidase (PPO) activity increased fivefold after 15 days”
t0“Pears”
Claim · model-written summary
Total polyphenol content fell by about 50% during storage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total polyphenol content decreased by about 50% during storage”
t0“Pears”
Claim · model-written summary
Polypropylene packaging yielded higher DPPH antioxidant capacity than LDPE, 15.55 versus 13.77 mg EAA 100 g−1 FW.
- Treatment
- PP packaginge0
- Outcome
- total antioxidant capacity (TAC) measured by DPPHe0
- Direction
- highere0
- Value
- 15.55 and 13.77 mg EAA 100 g−1 FWe0
- Comparator
- LDPEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wedges in PP packaging exhibited higher total antioxidant capacity (TAC) measured by DPPH than those in LDPE (15.55 and 13.77 mg EAA 100 g−1 FW, respectively)”
t0“Pears”
Claim · model-written summary
DPPH antioxidant contents in both packages declined 15–38% after 15 days.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both, the contents were reduced after 15 days (15–38%)”
e1“total antioxidant capacity (TAC) measured by DPPH”
t0“Pears”
Claim · model-written summary
FRAP antioxidant capacity showed no package difference and remained unchanged.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in TAC were observed in the FRAP assay, where values remained unchanged”
t0“Pears”
Claim · model-written summary
PPO activity, TAC, and color variables were significantly correlated.
- Outcome
- correlations between PPO activity, TAC, and color variablese0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant correlations between PPO activity, TAC, and color variables”
t0“Pears”
Claim · model-written summary
Packaging type had no significant effect on measured variables.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the type of packaging did not significantly affect any of the measured variables”
t0“Pears”
The same questions in other papers
storage · quality: phytochemicals · Pyrus (pears)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.