Abstract
Guava (Psidium guajava L.) is an important economic crop grown widely in tropical and subtropical regions. Guava exhibits fast ripening and senescence as a climacteric fruit, causing a short shelf life and quality deterioration. Chitosan–essential oil nanoemulsions can be an edible coating used to improve postharvest quality attributes. In this study, chitosan was mixed with carvacrol to generate a nano-emulsoid solution containing 0.1 and 0.2% (v/v) carvacrol, using a sonic dismembrator. Guava fruit were coated with the above emulsion and postharvest quality parameters were measured during storage at 20 ± 1 °C and RH = 80 ± 5% for 8 days. The result illustrated that the particle size of the chitosan–carvacrol emulsions was nanoscale, and their high stability was demonstrated by the zeta potential and polydispersity index. Chitosan coating (2%, w/v, 310–375 kDa) containing 0.2% (v/v) carvacrol maintained postharvest quality compared to chitosan alone, with higher firmness, soluble solid content, total acid, and total phenol content, and lower weight loss and pericarp browning. The collective data were further verified by principal component analysis. A chitosan coating containing carvacrol can reduce postharvest losses. It can be applied as an effective strategy to improve postharvest fruit quality.
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Claims 7
Claim · model-written summary
Chitosan-carvacrol emulsions had nanoscale particle size.
- Taxon
- Guava
Psidium guajavat0 - Outcome
- particle size of the chitosan–carvacrol emulsionse0
- Qualifier
- nanoscalee0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the particle size of the chitosan–carvacrol emulsions was nanoscale”
t0“Guava”
Claim · model-written summary
Zeta potential and polydispersity index indicated high emulsion stability.
- Taxon
- GuavaPsidium guajavat0
- Outcome
- high stabilitye0
- Qualifier
- zeta potential and polydispersity indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their high stability was demonstrated by the zeta potential and polydispersity index”
t0“Guava”
Claim · model-written summary
The 0.2% carvacrol coating maintained guava firmness relative to chitosan alone.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- Chitosan coating (2%, w/v, 310–375 kDa) containing 0.2% (v/v) carvacrole0
- Outcome
- firmnesse0
- Direction
- highere0
- Comparator
- chitosan alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan coating (2%, w/v, 310–375 kDa) containing 0.2% (v/v) carvacrol maintained postharvest quality compared to chitosan alone, with higher firmness”
t0“Guava”
Claim · model-written summary
The 0.2% carvacrol coating increased soluble solids, total acid and total phenols relative to chitosan alone.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- 0.2% (v/v) carvacrolt1
- Outcome
- soluble solid content, total acid, and total phenol contente0
- Direction
- highere0
- Comparator
- chitosan alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared to chitosan alone, with higher firmness, soluble solid content, total acid, and total phenol content”
t0“Guava”
t1“containing 0.2% (v/v) carvacrol”
Claim · model-written summary
The 0.2% carvacrol coating lowered guava weight loss and pericarp browning relative to chitosan alone.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- 0.2% (v/v) carvacrolt1
- Outcome
- weight loss and pericarp browninge0
- Direction
- lowere0
- Comparator
- chitosan alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared to chitosan alone, with higher firmness, soluble solid content, total acid, and total phenol content, and lower weight loss and pericarp browning”
t0“Guava”
t1“containing 0.2% (v/v) carvacrol”
Claim · model-written summary
Principal component analysis corroborated the postharvest quality findings.
- Taxon
- GuavaPsidium guajavat0
- Outcome
- collective data were further verifiede0
- Comparator
- principal component analysise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The collective data were further verified by principal component analysis.”
t0“Guava”
Claim · model-written summary
The authors recommend chitosan coating with carvacrol to improve postharvest guava quality.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- chitosan coating containing carvacrole0
- Outcome
- effective strategy to improve postharvest fruit qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A chitosan coating containing carvacrol can reduce postharvest losses. It can be applied as an effective strategy to improve postharvest fruit quality.”
t0“Guava”
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See all 46 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.