Abstract
The essential oil of black cumin seeds, Nigella sativa L., was tested for a possible antioxidant activity. A rapid evaluation for antioxidants, using two TLC screening methods, showed that thymoquinone and the components carvacrol, t-anethole and 4-terpineol demonstrated respectable radical scavenging property. These four constituents and the essential oil possessed variable antioxidant activity when tested in the diphenylpicrylhydracyl assay for non-specific hydrogen atom or electron donating activity. They were also effective.OH radical scavenging agents in the assay for non-enzymatic lipid peroxidation in liposomes and the deoxyribose degradation assay. GC-MS analysis of the essential oil obtained from six different samples of Nigella sativa seeds and from a commercial fixed oil showed that the qualitative composition of the volatile compounds was almost identical. Differences were mainly restricted to the quantitative composition.
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Claims 6
Claim · model-written summary
Thymoquinone from Nigella sativa essential oil showed respectable radical scavenging property in TLC screening.
- Taxon
- Nigella sativa
Nigella sativat0 - Compound
- thymoquinonee0
- Outcome
- respectable radical scavenging propertye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thymoquinone and the components carvacrol, t-anethole and 4-terpineol demonstrated respectable radical scavenging property”
t0“Nigella sativa”
Claim · model-written summary
Carvacrol, t-anethole and 4-terpineol from Nigella sativa essential oil showed respectable radical scavenging property in TLC screening.
- Taxon
- Nigella sativaNigella sativat0
- Compound
- carvacrol, t-anethole and 4-terpineole0
- Outcome
- respectable radical scavenging propertye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the components carvacrol, t-anethole and 4-terpineol demonstrated respectable radical scavenging property”
t0“Nigella sativa”
Claim · model-written summary
The four constituents and the essential oil had variable antioxidant activity in the diphenylpicrylhydracyl assay.
- Taxon
- Nigella sativaNigella sativat0
- Outcome
- variable antioxidant activitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These four constituents and the essential oil possessed variable antioxidant activity when tested in the diphenylpicrylhydracyl assay”
t0“Nigella sativa”
Claim · model-written summary
The constituents and the essential oil were effective OH radical scavengers in the liposome lipid peroxidation and deoxyribose degradation assays.
- Taxon
- Nigella sativaNigella sativat0
- Outcome
- effective.OH radical scavenging agentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“They were also effective.OH radical scavenging agents in the assay for non-enzymatic lipid peroxidation in liposomes and the deoxyribose degradation assay”
t0“Nigella sativa”
Claim · model-written summary
GC-MS showed that the qualitative composition of the volatile compounds was almost identical across six Nigella sativa seed samples and a commercial fixed oil.
- Taxon
- Nigella sativaNigella sativae3
- Outcome
- qualitative composition of the volatile compoundse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“GC-MS analysis of the essential oil obtained from six different samples of Nigella sativa seeds and from a commercial fixed oil showed that the qualitative composition of the volatile compounds was almost identical”
Claim · model-written summary
Differences among the samples were mainly restricted to the quantitative composition.
- Taxon
- Nigella sativaNigella sativat0
- Outcome
- quantitative compositione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Differences were mainly restricted to the quantitative composition”
t0“Nigella sativa”