Abstract
Total quercetin concentration in unprocessed 'Grano de Oro' onions was 557 mg/kg f.w. (fresh weight). No significant statistical differences in total quercetin concentration were shown between products packed under vacuum and modified atmosphere packaging (MAP), at the end of 30 days at 4°C. No significant statistical differences in total quercetin concentration were shown between water-washing and hypochlorite solution-washing products at the end of 30 days at 4°C, packed under vacuum or MAP. Only slight significant differences in total quercetin concentration were shown between whole onion and cut onion product, in all the treatments after long-term refrigerated storage at 4°C (11-30 days). Chopped samples packed in MAP after washing in either water (462 mg/kg f.w.) or hypochlorite (471 mg/kg f.w.) had increases in quercetin concentration of 19.5% and 22%, respectively, when compared to whole onions stored in MAP after washing in water (386 mg/kg f.w.) or hypochlorite (387 mg/kg f.w.). Minimal processing did not seem to significantly affect the quercetin concentration in onion products, and consequently the health-promoting characteristics described for raw onion are preserved.
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Claims 7
Claim · model-written summary
Unprocessed 'Grano de Oro' onions contained 557 mg/kg f.w. total quercetin.
- Taxon
- onions
Allium cepae0 - Material
- 'Grano de Oro'e0
- Outcome
- Total quercetin concentratione0
- Value
- 557 mg/kg f.w.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total quercetin concentration in unprocessed 'Grano de Oro' onions was 557 mg/kg f.w. (fresh weight).”
Claim · model-written summary
Vacuum and MAP packaging showed no significant difference in total quercetin after 30 days at 4°C.
- Taxon
- ONIONAllium cepat0
- Treatment
- vacuume0
- Outcome
- total quercetin concentratione0
- Direction
- No significant statistical differencese0
- Qualifier
- at the end of 30 days at 4°Ce0
- Comparator
- modified atmosphere packaging (MAP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant statistical differences in total quercetin concentration were shown between products packed under vacuum and modified atmosphere packaging (MAP), at the end of 30 days at 4°C.”
t0“ONION”
Claim · model-written summary
Water and hypochlorite washing showed no significant quercetin difference after 30 days.
- Taxon
- ONIONAllium cepat0
- Treatment
- water-washinge0
- Outcome
- total quercetin concentratione0
- Direction
- No significant statistical differencese0
- Qualifier
- at the end of 30 days at 4°Ce0
- Comparator
- hypochlorite solution-washinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant statistical differences in total quercetin concentration were shown between water-washing and hypochlorite solution-washing products at the end of 30 days at 4°C, packed under vacuum or MAP.”
t0“ONION”
Claim · model-written summary
Whole and cut onion products showed slight significant differences in quercetin after 11–30 days at 4°C.
- Taxon
- onionAllium cepae0
- Treatment
- cut onion producte0
- Outcome
- total quercetin concentratione0
- Qualifier
- 11-30 dayse0
- Comparator
- whole onione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only slight significant differences in total quercetin concentration were shown between whole onion and cut onion product, in all the treatments after long-term refrigerated storage at 4°C (11-30 days).”
Claim · model-written summary
MAP-packed chopped onion washed in water had 462 mg/kg f.w. quercetin, a 19.5% increase over whole onions.
- Taxon
- onionsAllium cepae0
- Treatment
- Chopped samples packed in MAP after washing in either watere0
- Outcome
- quercetin concentratione0
- Direction
- increasese0
- Value
- 19.5%e0
- Qualifier
- 462 mg/kg f.w.e0
- Comparator
- whole onions stored in MAP after washing in watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chopped samples packed in MAP after washing in either water (462 mg/kg f.w.) or hypochlorite (471 mg/kg f.w.) had increases in quercetin concentration of 19.5% and 22%, respectively, when compared to whole onions stored in MAP after washing in water (386 mg/kg f.w.) or hypochlorite (387 mg/kg f.w.).”
Claim · model-written summary
MAP-packed chopped onion washed in hypochlorite had 471 mg/kg f.w. quercetin, a 22% increase over whole onions.
- Taxon
- onionsAllium cepae0
- Treatment
- Chopped samples packed in MAP after washing in either water (462 mg/kg f.w.) or hypochloritee0
- Outcome
- quercetin concentratione0
- Direction
- increasese0
- Value
- 22%e0
- Qualifier
- 471 mg/kg f.w.e0
- Comparator
- whole onions stored in MAP after washing in water (386 mg/kg f.w.) or hypochloritee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chopped samples packed in MAP after washing in either water (462 mg/kg f.w.) or hypochlorite (471 mg/kg f.w.) had increases in quercetin concentration of 19.5% and 22%, respectively, when compared to whole onions stored in MAP after washing in water (386 mg/kg f.w.) or hypochlorite (387 mg/kg f.w.).”
Claim · model-written summary
The authors conclude minimal processing did not significantly affect onion quercetin concentration.
- Taxon
- onionAllium cepae0
- Treatment
- Minimal processinge0
- Outcome
- quercetin concentratione0
- Direction
- did not seem to significantly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Minimal processing did not seem to significantly affect the quercetin concentration in onion products”
The same questions in other papers
storage · molecular: metabolites · Allium cepa (onion)Positive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- no effect
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See all 9 papers →processing · molecular: metabolites · Allium cepa (onion)Positive and negative results
6 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
6 papers more in this group
See all 10 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.