Abstract
Abstract Guavas cv. ‘Kumagai’ were packed in several plastic materials and stored at 10°C and 85–90% relative humidity (RH) for 7, 14, 21 and 28 days (+3 days at 25°C). The plastic materials studied were: multilayer co‐extruded polyolephine film with selective permeability (PSP), low‐density polyethylene film (LDPE), LDPE film with mineral incorporation (LDPEm) and heat‐shrinkable polyolephine film (SHR). Guavas not packed were taken as control samples. The physicochemical characteristics of the fruits, O 2 and CO 2 transmission rates of the packaging materials and gas composition at the package headspace were evaluated. The LDPE film, 69 µm in thickness, with the lowest permeability to both O 2 and CO 2 , led to anaerobiosis and high CO 2 concentration inside the packages and promoted physiological disturbances and changes in fruit flavour. The SHR film, 15 µm in thickness, was the most permeable to CO 2 and had quite high O 2 transmission, which modified the inner atmosphere of the packages slightly. The fruits packed in this film showed a poorer quality than the controls, possibly due to the heat produced during the shrinking of the film. The LDPEm film, 24 µm in thickness, was almost as permeable to CO 2 but had reduced O 2 transmission, promoting an atmosphere of equilibrium of 3% O 2 and 4.5% CO 2 . Fruits packed in this film kept their skin colour and pulp firmness, suitable for consumption up to 14 days. The PSP film, 35 µm in thickness, had the greatest O 2 transmission but just over half of the CO 2 transmission of LDPEm, promoting an atmosphere of equilibrium of 0.5% O 2 and 4.5% CO 2 inside the packages. Fruits packed in such packages kept their physicochemical characteristics up to 21 days. Copyright © 2001 John Wiley & Sons, Ltd.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
LDPE produced anaerobiosis and high package CO2, with physiological disturbance and flavour change.
- Taxon
- Guavas
Psidium guajavae1 - Material
- ‘Kumagai’e1
- Treatment
- LDPE filme0
- Outcome
- physiological disturbances and changes in fruit flavoure0
- Qualifier
- anaerobiosis and high CO 2 concentration inside the packagese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The LDPE film, 69 µm in thickness, with the lowest permeability to both O 2 and CO 2 , led to anaerobiosis and high CO 2 concentration inside the packages and promoted physiological disturbances and changes in fruit flavour.”
e1“Guavas cv. ‘Kumagai’”
Claim · model-written summary
SHR slightly modified the internal package atmosphere.
- Taxon
- GuavasPsidium guajavae1
- Treatment
- SHR filme0
- Outcome
- inner atmosphere of the packagese0
- Qualifier
- slightlye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SHR film, 15 µm in thickness, was the most permeable to CO 2 and had quite high O 2 transmission, which modified the inner atmosphere of the packages slightly.”
e1“Guavas cv. ‘Kumagai’”
Claim · model-written summary
Guavas in SHR film had poorer quality than unpacked controls, possibly from shrink heat.
- Taxon
- GuavasPsidium guajavae2
- Treatment
- heat‐shrinkable polyolephine film (SHR)e1
- Outcome
- qualitye0
- Direction
- poorere0
- Qualifier
- possibly due to the heat produced during the shrinking of the filme0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fruits packed in this film showed a poorer quality than the controls, possibly due to the heat produced during the shrinking of the film.”
e1“heat‐shrinkable polyolephine film (SHR)”
e2“Guavas cv. ‘Kumagai’”
Claim · model-written summary
LDPEm established an equilibrium atmosphere of 3% O2 and 4.5% CO2.
- Taxon
- GuavasPsidium guajavae1
- Treatment
- LDPEm filme0
- Outcome
- atmosphere of equilibriume0
- Value
- 3% O 2 and 4.5% CO 2e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The LDPEm film, 24 µm in thickness, was almost as permeable to CO 2 but had reduced O 2 transmission, promoting an atmosphere of equilibrium of 3% O 2 and 4.5% CO 2 .”
e1“Guavas cv. ‘Kumagai’”
Claim · model-written summary
LDPEm maintained guava skin colour and pulp firmness suitable for consumption up to 14 days.
- Taxon
- GuavasPsidium guajavae2
- Treatment
- LDPE film with mineral incorporation (LDPEm)e1
- Outcome
- skin colour and pulp firmnesse0
- Direction
- kepte0
- Value
- 14 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits packed in this film kept their skin colour and pulp firmness, suitable for consumption up to 14 days.”
e1“LDPE film with mineral incorporation (LDPEm)”
e2“Guavas cv. ‘Kumagai’”
Claim · model-written summary
PSP packages reached 0.5% O2 and 4.5% CO2 equilibrium.
- Taxon
- GuavasPsidium guajavae1
- Treatment
- PSP filme0
- Outcome
- atmosphere of equilibriume0
- Value
- 0.5% O 2 and 4.5% CO 2e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PSP film, 35 µm in thickness, had the greatest O 2 transmission but just over half of the CO 2 transmission of LDPEm, promoting an atmosphere of equilibrium of 0.5% O 2 and 4.5% CO 2 inside the packages.”
e1“Guavas cv. ‘Kumagai’”
Claim · model-written summary
PSP packages preserved guava physicochemical characteristics up to 21 days.
- Taxon
- GuavasPsidium guajavae2
- Treatment
- multilayer co‐extruded polyolephine film with selective permeability (PSP)e1
- Outcome
- physicochemical characteristicse0
- Direction
- kepte0
- Value
- 21 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits packed in such packages kept their physicochemical characteristics up to 21 days.”
e1“multilayer co‐extruded polyolephine film with selective permeability (PSP)”
e2“Guavas cv. ‘Kumagai’”
The same questions in other papers
heat · quality: general · Psidium guajava (guava)Positive and negative results
2 in the opposite direction
- positive
- positive
mulching · quality: general · Psidium guajava (guava)Positive and negative results
2 in the opposite direction
- positive
- positive
mulching · quality: postharvest · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- 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.