Abstract
Antioxidant capacity of edible parts and tunic of nine selected onion cultivars of yellow, red and white color was estimated in freshly harvested bulbs and after long-term winter storage. Phenolic substances such as total, phenylpropanoids, flavonols and anthocyanins were detected by spectrophotometric and HPLC methods. Radical scavenging activity was measured in tissue extracts and expressed as the percentage of DPPH neutralization. Great variability of phenolics was observed in the onion flesh as well as in the tunic, the level of them determined in the skin was considerably higher in comparison with the edible parts. Antiradical activity of the flesh was poor, however, in the tunic exceeded 60% and was correlated with content of total phenols. Five month storage did not affect either phenolic substances or RSA in onion tunic while in flesh the significant decrease of antiradical activity was noted.
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Claims 6
Claim · model-written summary
Phenolic levels varied greatly in onion flesh and tunic and were higher in skin than edible parts.
- Taxon
- onion
Allium cepae0 - Outcome
- level of them determined in the skine0
- Direction
- considerably highere0
- Comparator
- edible partse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Great variability of phenolics was observed in the onion flesh as well as in the tunic, the level of them determined in the skin was considerably higher in comparison with the edible parts.”
Claim · model-written summary
Onion flesh antiradical activity was poor, while tunic activity exceeded 60%.
- Taxon
- onion cultivarsAllium cepat0
- Outcome
- Antiradical activity of the fleshe0
- Direction
- poore0
- Qualifier
- in the tunic exceeded 60%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antiradical activity of the flesh was poor, however, in the tunic exceeded 60%”
t0“nine selected onion cultivars of yellow, red and white color”
Claim · model-written summary
Onion tunic antiradical activity exceeded 60%.
- Taxon
- onion cultivarsAllium cepat0
- Outcome
- in the tunic exceeded 60%e0
- Direction
- exceedede0
- Value
- 60%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the tunic exceeded 60%”
t0“nine selected onion cultivars of yellow, red and white color”
Claim · model-written summary
Antiradical activity correlated with total phenols.
- Taxon
- onion cultivarsAllium cepat0
- Compound
- total phenolse0
- Outcome
- content of total phenolse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was correlated with content of total phenols”
t0“nine selected onion cultivars of yellow, red and white color”
Claim · model-written summary
Five month storage did not affect onion tunic phenolics or antiradical activity.
- Taxon
- onion cultivarsAllium cepat0
- Treatment
- Five month storagee0
- Outcome
- phenolic substances or RSA in onion tunice0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five month storage did not affect either phenolic substances or RSA in onion tunic”
t0“nine selected onion cultivars of yellow, red and white color”
Claim · model-written summary
Five month storage significantly decreased antiradical activity in onion flesh.
- Taxon
- onion cultivarsAllium cepat0
- Organ / stage
- fleshe0
- Treatment
- Five month storagee0
- Outcome
- antiradical activitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five month storage did not affect either phenolic substances or RSA in onion tunic while in flesh the significant decrease of antiradical activity was noted.”
t0“nine selected onion cultivars of yellow, red and white color”
The same questions in other papers
storage · quality: phytochemicals · Allium cepa (onion)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 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.