Abstract
After harvesting, pears undergo numerous biochemical processes and frequently fail to reach acceptable quality. The uses of packaging and ethylene (C2H4) absorber are regarded as well-known ways to solve that problem. However, accumulated CO2 in the package can promote the symptoms of internal browning on pear flesh also exacerbated by too low O2 concentrations. To inhibit the symptoms in ‘Silver Bell’ pear for a long period, we utilized CO2 adsorbent, CO2 adsorbent plus C2H4 adsorbent, and without both adsorbents in a bag to investigate their effects on internal browning development for 7 months in cold-storage. We found both adsorbents successfully reduced CO2 and C2H4 levels even though the incidences were visually found at 3 months of storage. Most severe internal browning was observed on CO2 adsorbent-untreated pears under high CO2 levels (7-9%) increasing since the beginning of storage. Therefore, there were no significant differences on the color and flesh firmness among the treatments, except controls, during cold-storage. Internal browning-affected pears showed harder flesh, greener and darker color compared with unaffected pears. Interestingly, control samples also suffered internal browning under low CO2 (̴ 0.1%) and high O2 (̴ 20.5%) concentrations after 5 months in storage with medium damage levels. We conclude that the uses of CO2 and C2H4 adsorbents successfully lowered CO2 and C2H4 levels in the bags during cold storage, but the both failed to prevent an internal browning development because too long storage period eventually caused internal browning.
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Claims 8
Claim · model-written summary
The adsorbents reduced CO2 and C2H4 levels in bags.
Not reportedComparator
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“both adsorbents successfully reduced CO2 and C2H4 levels”
Claim · model-written summary
Internal browning appeared after three months of storage despite adsorbents.
Not reportedDirection
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“the incidences were visually found at 3 months of storage”
Claim · model-written summary
The most severe internal browning occurred in pears without CO2 adsorbent under 7–9% CO2.
PyrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“Most severe internal browning was observed on CO2 adsorbent-untreated pears under high CO2 levels (7-9%) increasing since the beginning of storage.”
Claim · model-written summary
Color and flesh firmness did not differ significantly among noncontrol treatments.
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“there were no significant differences on the color and flesh firmness among the treatments, except controls, during cold-storage.”
Claim · model-written summary
Browning affected pears had harder flesh than unaffected pears.
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“Internal browning-affected pears showed harder flesh, greener and darker color compared with unaffected pears.”
Claim · model-written summary
Browning affected pears had greener and darker color than unaffected pears.
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“Internal browning-affected pears showed harder flesh, greener and darker color compared with unaffected pears.”
Claim · model-written summary
Control pears developed medium internal browning after five months at low CO2 and high O2.
- Taxon
- ‘Silver Bell’ Peart0
- Outcome
- internal browninge0
- Qualifier
- after 5 months in storage with medium damage levelse0
Not reportedDirection
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“control samples also suffered internal browning under low CO2 (̴ 0.1%) and high O2 (̴ 20.5%) concentrations after 5 months in storage with medium damage levels.”
Claim · model-written summary
The authors concluded that both adsorbents failed to prevent internal browning during long storage.
- Taxon
- ‘Silver Bell’ Peart0
- Treatment
- the bothe0
- Outcome
- internal browning developmente0
- Direction
- failed to prevente0
- Qualifier
- too long storage periode0
Not reportedComparator
Verbatim
t0“‘Silver Bell’ Pear (Pyrus communis L.)”
e0“the both failed to prevent an internal browning development because too long storage period eventually caused internal browning.”
The same questions in other papers
co2 · disease · Pyrus (pears)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →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.