Abstract
Cold plasma treatment can inactivate microorganisms on the surface of fresh fruits to ensure food safety. Gliding arc plasma-activated air (PAA) was used in this study to treat blueberries in a sealed space. The results show that 20 min of PAA treatment effectively sterilized the bacterial and yeast + mold counts at the 30th day by 2.42 and 1.30 log 10 CFU/g, respectively. There was no significant difference in the weight loss rate of blueberries before and after PAA treatment, which led to an extended shelf life of 10–15 days at ambient conditions. Quality properties of treated blueberries, such as firmness, soluble solids, vitamin C, and anthocyanin, which was mediated by homogeneous enzymes, were found to be preserved at a high level in comparison with that of control samples. Furthermore, PAA treatment was found to significantly reduce the decline rate in enzyme activity with highest levels of 62, 59, and 7.4 U/(min·g) for peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), respectively, after 20 min of treatment through production of a high density of •OH dominant active air. This PAA treatment supplies a novel storage and preservation choice for other fresh fruits and vegetables on a large scale.
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Claims 11
Claim · model-written summary
A 20 min PAA treatment sterilized bacteria on blueberries by 2.42 log10 CFU/g at day 30.
- Taxon
- blueberriese0
- Treatment
- 20 min of PAA treatmente1
- Outcome
- bacteriale1
- Direction
- sterilizede1
- Value
- 2.42e1
- Setting
- sealed spacee0
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“The results show that 20 min of PAA treatment effectively sterilized the bacterial and yeast + mold counts at the 30th day by 2.42 and 1.30 log 10 CFU/g, respectively”
Claim · model-written summary
A 20 min PAA treatment sterilized yeast and mold counts on blueberries by 1.30 log10 CFU/g at day 30.
- Taxon
- blueberriese0
- Treatment
- 20 min of PAA treatmente1
- Outcome
- yeast + mold countse1
- Direction
- sterilizede1
- Value
- 1.30e1
- Setting
- sealed spacee0
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“The results show that 20 min of PAA treatment effectively sterilized the bacterial and yeast + mold counts at the 30th day by 2.42 and 1.30 log 10 CFU/g, respectively”
Claim · model-written summary
PAA treatment did not change the weight loss rate of blueberries.
Verbatim
e0“to treat blueberries in a sealed space”
e1“There was no significant difference in the weight loss rate of blueberries before and after PAA treatment”
Claim · model-written summary
PAA treatment extended the shelf life of blueberries by 10–15 days at ambient conditions.
- Taxon
- blueberriese0
- Treatment
- PAA treatmente2
- Outcome
- shelf lifee1
- Direction
- extendede1
- Value
- 10–15 dayse1
- Setting
- ambient conditionse1
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“which led to an extended shelf life of 10–15 days at ambient conditions”
e2“There was no significant difference in the weight loss rate of blueberries before and after PAA treatment”
Claim · model-written summary
PAA-treated blueberries kept firmness, soluble solids and vitamin C at a high level compared with control samples.
Verbatim
e0“to treat blueberries in a sealed space”
e1“Quality properties of treated blueberries, such as firmness, soluble solids, vitamin C, and anthocyanin, which was mediated by homogeneous enzymes, were found to be preserved at a high level in comparison with that of control samples”
e2“There was no significant difference in the weight loss rate of blueberries before and after PAA treatment”
Claim · model-written summary
PAA-treated blueberries kept anthocyanin at a high level compared with control samples.
Verbatim
e0“to treat blueberries in a sealed space”
e1“Quality properties of treated blueberries, such as firmness, soluble solids, vitamin C, and anthocyanin, which was mediated by homogeneous enzymes, were found to be preserved at a high level in comparison with that of control samples”
e2“There was no significant difference in the weight loss rate of blueberries before and after PAA treatment”
Claim · model-written summary
PAA treatment significantly reduced the decline rate in enzyme activity of blueberries.
- Taxon
- blueberriese0
- Treatment
- PAA treatmente1
- Outcome
- enzyme activitye1
- Direction
- significantly reduce the decline ratee1
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“PAA treatment was found to significantly reduce the decline rate in enzyme activity”
Claim · model-written summary
PAA treatment gave the highest peroxidase (POD) activity, 62 U/(min·g), after 20 min.
- Taxon
- blueberriese0
- Treatment
- PAA treatmente2
- Outcome
- peroxidase (POD)e1
- Direction
- highest levelse1
- Value
- 62e1
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“with highest levels of 62, 59, and 7.4 U/(min·g) for peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), respectively”
e2“PAA treatment was found to significantly reduce the decline rate in enzyme activity”
Claim · model-written summary
PAA treatment gave the highest superoxide dismutase (SOD) activity, 59 U/(min·g), after 20 min.
- Taxon
- blueberriese0
- Treatment
- PAA treatmente2
- Outcome
- superoxide dismutase (SOD)e1
- Direction
- highest levelse1
- Value
- 59e1
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“with highest levels of 62, 59, and 7.4 U/(min·g) for peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), respectively”
e2“PAA treatment was found to significantly reduce the decline rate in enzyme activity”
Claim · model-written summary
PAA treatment gave the highest catalase (CAT) activity, 7.4 U/(min·g), after 20 min.
- Taxon
- blueberriese0
- Treatment
- PAA treatmente2
- Outcome
- catalase (CAT)e1
- Direction
- highest levelse1
- Value
- 7.4e1
Not reportedComparator
Verbatim
e0“to treat blueberries in a sealed space”
e1“with highest levels of 62, 59, and 7.4 U/(min·g) for peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), respectively”
e2“PAA treatment was found to significantly reduce the decline rate in enzyme activity”
Claim · model-written summary
The authors suggest PAA treatment is a novel storage and preservation choice for other fresh fruits and vegetables.
Verbatim
e1“This PAA treatment supplies a novel storage and preservation choice for other fresh fruits and vegetables on a large scale”
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physical treatment · quality: phytochemicals · VacciniumResults agree
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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.