Abstract
POIANA, M. A., D. MOIGRADEAN and E. ALEXA, 2010. Influence of home-scale freezing and storage on antioxidant properties and color quality of different garden fruits. Bulg. J. Agric. Sci., 16: 163-171 The goal of this study is to investigate the influence of home freezing and storage at -18°C up to 10 months on the antioxidant properties and color indices of selected fruits species: strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.). Samples were extracted and subjected to analyses for total phenolics content, total monomeric anthocyanins, vitamin C, antioxidant activity and color indices. The content of total phenolics was analyzed by Folin-Ciocalteu colorimetric method, total anthocyanins were evaluated using pH-differential method, vitamin C content by 2,6-dichlorophenolindophenol method, antioxidant activity using FRAP assay and color indices of extracts by bisulphite bleaching method. Sour cherries contain the highest amounts of polyphenols, anthocyanins and antioxidant activity among the investigated fruits species. The highest content of vitamin C was found in the fresh strawberries. After freezing, small losses were recorded for investigated bioactive compounds and color indices of fruits, because the home-freezing is a non destroyed preservation method. The storage up to 4 months did not significantly affect the bioactive compounds and color indices of investigated fruits. After a period of 10 months storage, phenolics content in frozen fruits decreased up to 28-47% of the initial value; the total anthocyanins is preserved in proportion of 80-91% of the initial value, the vitamin C content is kept at 62-76% of the initial value. By home-scale freezing and storage for 10 months, the smallest losses of antioxidant activity were recorded for sour cherries and the biggest for strawberries.
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Claims 9
Claim · model-written summary
Sour cherries had the highest polyphenols, anthocyanins and antioxidant activity.
- Taxon
- Sour cherries
Prunus cerasuse0 - Outcome
- polyphenols, anthocyanins and antioxidant activitye0
- Direction
- higheste0
- Comparator
- investigated fruits speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sour cherries contain the highest amounts of polyphenols, anthocyanins and antioxidant activity among the investigated fruits species.”
Claim · model-written summary
Fresh strawberries had the highest vitamin C content.
- Taxon
- strawberries
_single2.jpg?width=60)
Fragaria ×ananassae0 - Organ / stage
- freshe0
- Outcome
- content of vitamin Ce0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“The highest content of vitamin C was found in the fresh strawberries.”
Claim · model-written summary
Freezing caused small losses in fruit bioactive compounds and color indices.
- Taxon
- strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)Fragaria ×ananassa
Prunus aviumPrunus cerasust0 - Treatment
- freezinge0
- Outcome
- bioactive compounds and color indicese0
- Direction
- lossese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After freezing, small losses were recorded for investigated bioactive compounds and color indices of fruits”
t0“strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)”
Claim · model-written summary
Storage to four months did not significantly affect fruit bioactive compounds and color.
- Taxon
- strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)Fragaria ×ananassaPrunus aviumPrunus cerasust0
- Treatment
- storage up to 4 monthse0
- Outcome
- bioactive compounds and color indicese0
- Direction
- did not significantly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The storage up to 4 months did not significantly affect the bioactive compounds and color indices of investigated fruits.”
t0“strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)”
Claim · model-written summary
After ten months, fruit phenolics decreased by 28–47% of initial value.
- Taxon
- strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)Fragaria ×ananassaPrunus aviumPrunus cerasust0
- Treatment
- 10 months storagee0
- Outcome
- phenolics contente0
- Direction
- decreasede0
- Value
- 28-47%e0
- Comparator
- initial valuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After a period of 10 months storage, phenolics content in frozen fruits decreased up to 28-47% of the initial value”
t0“strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)”
Claim · model-written summary
After ten months, fruit anthocyanins were retained at 80–91% of initial value.
- Taxon
- strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)Fragaria ×ananassaPrunus aviumPrunus cerasust0
- Outcome
- total anthocyaninse0
- Direction
- preservede0
- Value
- 80-91%e0
- Comparator
- initial valuee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total anthocyanins is preserved in proportion of 80-91% of the initial value”
t0“strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)”
Claim · model-written summary
After ten months, fruit vitamin C was retained at 62–76% of initial value.
- Taxon
- strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)Fragaria ×ananassaPrunus aviumPrunus cerasust0
- Outcome
- vitamin C contente0
- Direction
- kepte0
- Value
- 62-76%e0
- Comparator
- initial valuee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the vitamin C content is kept at 62-76% of the initial value.”
t0“strawberry (Fragaria ananassa), sweet cherry (Prunus avium L.) and sour cherry (Prunus cerasus L.)”
Claim · model-written summary
Sour cherries had the smallest antioxidant activity losses after ten months of freezing and storage.
- Taxon
- sour cherriesPrunus cerasuse0
- Treatment
- home-scale freezing and storage for 10 monthse0
- Outcome
- losses of antioxidant activitye0
- Direction
- smalleste0
- Comparator
- strawberriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By home-scale freezing and storage for 10 months, the smallest losses of antioxidant activity were recorded for sour cherries and the biggest for strawberries.”
Claim · model-written summary
Strawberries had the biggest antioxidant activity losses after ten months of freezing and storage.
- Taxon
- strawberriesFragaria ×ananassae0
- Treatment
- home-scale freezing and storage for 10 monthse0
- Outcome
- losses of antioxidant activitye0
- Direction
- biggeste0
- Comparator
- sour cherriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By home-scale freezing and storage for 10 months, the smallest losses of antioxidant activity were recorded for sour cherries and the biggest for strawberries.”
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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.