Abstract
Background: Pomegranate peels are rich in bioactive compounds and could be an alternative natural source such as antioxidants. Aims: The aim of the present study was to assess the abilities of five solvents to extract phenolic antioxidants from pomegranate peels. Methods and Material: Pomegranate peels powder was subjected to extraction and the extraction yield was compared. The total phenolic, flavonoid, condensed and hydrolysable tannins contents were analyzed. The antioxidant activity of the extracts was evaluated by two methods (DPPH* and ABTS•+ scavenging capacities) and results were then compared. Results: Results showed that the mixture methanol/water (50:50) allowed higher extraction yield (37.33±5.3%) than the others solvents (P<0.05). Further, the total phenolic, flavonoid and condensed tannins contents were the highest in mixture water/methanol (50:50) extract. Phenolic antioxidants showed a distinct reducing capacity and a high DPPH* inhibition values were recorded for all extracts with no significant differences (P>0.05) between ethanol and mixture water/methanol (50:50) extracts. All extracts exhibited high inhibition against ABTS•+ but with a considerable variation. Phenolic content and antioxidant activities were well positively correlated with each other. Conclusions: Our findings revealed that the choice of the extracting solvent affects considerably the extraction of phenolic antioxidants from pomegranate peels. Keywords: Pomegranate peels, solvent extraction, antioxidant activity, phenolic antioxidants.
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Claims 6
Claim · model-written summary
Methanol-water gave the highest extraction yield, 37.33±5.3%.
- Taxon
- pomegranate
Punica granatume0 - Treatment
- methanol/water (50:50)e1
- Outcome
- extraction yielde1
- Direction
- highere1
- Value
- 37.33±5.3%e1
- Comparator
- the others solventse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“mixture methanol/water (50:50) allowed higher extraction yield (37.33±5.3%) than the others solvents (P<0.05)”
Claim · model-written summary
Water-methanol extract had the highest total phenolic, flavonoid and condensed tannin contents.
- Taxon
- pomegranatePunica granatume0
- Treatment
- mixture water/methanol (50:50) extracte1
- Outcome
- total phenolic, flavonoid and condensed tannins contentse1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“the total phenolic, flavonoid and condensed tannins contents were the highest in mixture water/methanol (50:50) extract”
Claim · model-written summary
Phenolic antioxidants showed reducing capacity.
- Taxon
- pomegranatePunica granatume0
- Outcome
- reducing capacitye1
- Direction
- distincte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“Phenolic antioxidants showed a distinct reducing capacity”
Claim · model-written summary
All extracts had high DPPH inhibition, with no significant difference between ethanol and water-methanol extracts.
- Taxon
- pomegranatePunica granatume0
- Outcome
- DPPH* inhibition valuese1
- Direction
- no significant differencese1
- Comparator
- ethanol and mixture water/methanol (50:50) extractse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“high DPPH* inhibition values were recorded for all extracts with no significant differences (P>0.05) between ethanol and mixture water/methanol (50:50) extracts”
Claim · model-written summary
All extracts strongly inhibited ABTS, with considerable variation.
- Taxon
- pomegranatePunica granatume0
- Outcome
- inhibition against ABTS•+e1
- Direction
- highe1
- Qualifier
- considerable variatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“All extracts exhibited high inhibition against ABTS•+ but with a considerable variation.”
Claim · model-written summary
Phenolic content correlated positively with antioxidant activity.
- Taxon
- pomegranatePunica granatume0
- Compound
- Phenolic contente1
- Outcome
- antioxidant activitiese1
- Direction
- positively correlatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pomegranate (Punica granatum L.) peel”
e1“Phenolic content and antioxidant activities were well positively correlated with each other.”
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