Abstract
Background: Fresh cut fruits and vegetables go through preparation steps such as peeling, cutting or slicing so they exposed to wounding stress, spoilage and microbial growth. Edible coatings with antimicrobial agents can extend the shelf-life of fresh-cut fruit and vegetables. Methodology: Preparation of chitosan/starch coating solutions with different ratios and studying their rheological properties then using them in coating of taro (Colocasia esculenta L. Schott) pieces, coated taro pieces were packed in foam trays and wrapped using stretch poly ethylene film then kept at 4EC. Changes in weight loss, firmness, pH, total soluble solids (TSS), moisture content, sensory evaluation and microbial growth were measured during 20 days. Results: Coating solutions showed shear-thinning (pseudo plastic) behavior the flow behavior (Shear stress against shear rate) of the solutions was well described using the power law model. Coating solutions containing chitosan enhance chemical and microbial properties of coated taro, enhancement increases as chitosan percent increases reach to maximum with 100% chitosan solution. Weight loss of coated samples decreases compared to uncoated samples, moisture content of uncoated samples dropped to 34.41% from its original moisture content at the end of storage period while the moisture content of coated samples ranged from 59.20-66.28%. The pH, TSS and firmness changed slightly along the storage period. Hundred percent chitosan coating treatment extend the shelf life of fresh cut taro for 20 days also improved quality and acceptability of fresh cut taro. The presence of chitosan in the coatings inhibited the growth of total count bacteria and yeast and mold throughout the storage period and improved the sensory evaluation. Conclusion: Chitosan/starch coating solutions behaves as pseudoplastic, chitosan/starch coating solutions increase the shelf life of and enhance different properties of fresh cut taro.
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Claims 10
Claim · model-written summary
Weight loss of coated taro decreased compared with uncoated samples.
- Taxon
- Taro
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=60)
Colocasia esculentat0 - Treatment
- chitosan/starch coatinge0
- Outcome
- Weight losse1
- Direction
- decreasese1
- Comparator
- uncoated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=500)
Verbatim
t0“Fresh Cut Taro”
e0“Preparation of chitosan/starch coating solutions with different ratios”
e1“Weight loss of coated samples decreases compared to uncoated samples”
Claim · model-written summary
Moisture content of uncoated taro dropped to 34.41% from its original level by the end of storage.
- Taxon
- TaroColocasia esculentat0
- Outcome
- moisture content of uncoated samplese2
- Direction
- droppede2
- Value
- 34.41%e2
- Qualifier
- from its original moisture content at the end of storage periode2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e2“moisture content of uncoated samples dropped to 34.41% from its original moisture content at the end of storage period”
Claim · model-written summary
Moisture content of coated taro ranged from 59.20 to 66.28% during storage.
- Taxon
- TaroColocasia esculentat0
- Outcome
- moisture content of coated samplese3
- Value
- 59.20-66.28%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e3“the moisture content of coated samples ranged from 59.20-66.28%”
Claim · model-written summary
A 100% chitosan coating extended shelf life of fresh-cut taro by 20 days.
- Taxon
- TaroColocasia esculentat0
- Treatment
- Hundred percent chitosan coating treatmente4
- Outcome
- shelf lifee4
- Direction
- extende4
- Value
- 20 dayse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e4“Hundred percent chitosan coating treatment extend the shelf life of fresh cut taro for 20 days”
Claim · model-written summary
A 100% chitosan coating improved quality and acceptability of fresh-cut taro.
- Taxon
- TaroColocasia esculentat0
- Treatment
- Hundred percent chitosan coating treatmente4
- Outcome
- quality and acceptabilitye5
- Direction
- improvede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e4“Hundred percent chitosan coating treatment extend the shelf life of fresh cut taro for 20 days”
e5“improved quality and acceptability of fresh cut taro”
Claim · model-written summary
Chitosan in the coatings inhibited growth of total bacteria and yeast and mold throughout storage.
- Taxon
- TaroColocasia esculentat0
- Treatment
- presence of chitosan in the coatingse6
- Interactor
- total count bacteriae6other
- Second interactor
- yeast and molde6other
- Outcome
- growth of total count bacteria and yeast and molde6
- Direction
- inhibitede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e6“The presence of chitosan in the coatings inhibited the growth of total count bacteria and yeast and mold throughout the storage period”
Claim · model-written summary
Chitosan in the coatings improved sensory evaluation of coated taro.
- Taxon
- TaroColocasia esculentat0
- Treatment
- presence of chitosan in the coatingse6
- Outcome
- sensory evaluatione7
- Direction
- improvede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e6“The presence of chitosan in the coatings inhibited the growth of total count bacteria and yeast and mold throughout the storage period”
e7“improved the sensory evaluation”
Claim · model-written summary
pH, TSS and firmness of coated taro changed slightly during storage.
- Taxon
- TaroColocasia esculentat0
- Outcome
- pH, TSS and firmnesse1
- Direction
- changed slightlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e1“The pH, TSS and firmness changed slightly along the storage period”
Claim · model-written summary
Chemical and microbial properties of coated taro increased as chitosan percent increased, maximal at 100% chitosan.
- Taxon
- TaroColocasia esculentat0
- Treatment
- chitosan percente1
- Outcome
- chemical and microbial propertiese1
- Direction
- increasese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e1“Coating solutions containing chitosan enhance chemical and microbial properties of coated taro, enhancement increases as chitosan percent increases reach to maximum with 100% chitosan solution”
Claim · model-written summary
Chitosan/starch coating solutions showed shear-thinning (pseudoplastic) flow behavior.
- Taxon
- TaroColocasia esculentat0
- Outcome
- shear-thinning (pseudo plastic) behaviore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fresh Cut Taro”
e1“Coating solutions showed shear-thinning (pseudo plastic) behavior”
The same questions in other papers
chitosan · growth · Colocasia esculenta (taro)Results agree
1 paper in the same direction as this paper
- positive
storage · quality: postharvest · Colocasia esculenta (taro)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.