Abstract
Pomegranate seed oil (PSO) is recognized as a major by-product of the agro-food industry. This study evaluates thirty Iranian pomegranate cultivars with respect to their seed oil yield and fatty acid composition. Cultivars with the highest oil yields were selected for further analysis of oil stability and quality. Oxidative stability was assessed through standardized oxidation tests, and chemical changes were monitored using 1 H NMR spectroscopy under various storage conditions. The findings revealed that punicic acid was the dominant fatty acid, while stearic acid was the least prevalent. 1 H NMR analysis confirmed the isomerization of punicic acid (C18:3 9c, 11t, 13c) to β-eleostearic acid (C18:3 9t, 11t, 13t), caused by the conversion of cis bonds to trans under direct sunlight exposure. A notable degradation in oil quality was observed under oxidative conditions. Based on these results, storage at room temperature, protected from sunlight and air (to limit oxygen exposure), is recommended to maintain PSO quality. This study offers valuable insights into the potential of PSO as a functional food by-product and highlights essential technical considerations for its storage in the food industry.
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Claims 5
Claim · model-written summary
Punicic acid was the dominant fatty acid in pomegranate seed oil.
- Taxon
- pomegranate
Punica granatumt0 - Outcome
- punicic acid was the dominant fatty acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“punicic acid was the dominant fatty acid, while stearic acid was the least prevalent”
t0“pomegranate”
Claim · model-written summary
Stearic acid was the least prevalent fatty acid.
- Taxon
- pomegranatePunica granatumt0
- Outcome
- stearic acid was the least prevalente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“punicic acid was the dominant fatty acid, while stearic acid was the least prevalent”
t0“pomegranate”
Claim · model-written summary
Direct sunlight caused punicic acid isomerization to β-eleostearic acid.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- direct sunlight exposuree0
- Outcome
- isomerization of punicic acid (C18:3 9c, 11t, 13c) to β-eleostearic acid (C18:3 9t, 11t, 13t)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isomerization of punicic acid (C18:3 9c, 11t, 13c) to β-eleostearic acid (C18:3 9t, 11t, 13t), caused by the conversion of cis bonds to trans under direct sunlight exposure”
t0“pomegranate”
Claim · model-written summary
Oxidative conditions degraded oil quality.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- oxidative conditionse0
- Outcome
- oil qualitye0
- Direction
- degradatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A notable degradation in oil quality was observed under oxidative conditions.”
t0“pomegranate”
Claim · model-written summary
The authors recommend room temperature storage protected from sun and air to maintain quality.
- Taxon
- pomegranatePunica granatumt0
- Outcome
- storage at room temperature, protected from sunlight and air (to limit oxygen exposure)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage at room temperature, protected from sunlight and air (to limit oxygen exposure), is recommended to maintain PSO quality”
t0“pomegranate”
The same questions in other papers
light · molecular: metabolites · Punica granatum (pomegranate)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.