Abstract
Abstract Essential oil samples of Mentha x piperita L. (peppermint) were analysed by GC–MS and assayed for their antibacterial, antifungal and antioxidant activities. The steam‐distilled oil samples were obtained from autumn and spring planted crops which were treated with nitrogen and phosphorus fertilizers at different rates. The oil samples from spring planted crops had a significantly higher menthol and lower terpinen‐4‐ol concentrations than those from autumn planted crops. Mineral fertilization seemed to increase the content of menthol in the oil, and decreased that of menthone and β‐caryophyllene. The oil samples showed a different degree of inhibition against the twenty‐five microorganisms tested. Some differences were found between the oil samples from autumn and spring planted crops, the former being more active against some microorganisms, and the oil samples from fertilized peppermint seemed to be, on the whole, slightly more effective. Peppermint oil exhibited a marked antifungal activity against Aspergillus niger .
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Claims 8
Claim · model-written summary
Spring planting gave peppermint oil significantly higher menthol concentration than autumn planting.
Not reportedTaxon
Verbatim
e0“The oil samples from spring planted crops had a significantly higher menthol and lower terpinen‐4‐ol concentrations than those from autumn planted crops”
Claim · model-written summary
Spring planting gave peppermint oil lower terpinen‐4‐ol concentration than autumn planting.
- Treatment
- spring planted cropse0
- Outcome
- terpinen‐4‐ol concentrationse0
- Direction
- lowere0
- Comparator
- autumn planted cropse0
Not reportedTaxon
Verbatim
e0“The oil samples from spring planted crops had a significantly higher menthol and lower terpinen‐4‐ol concentrations than those from autumn planted crops”
Claim · model-written summary
Mineral fertilization appeared to increase menthol content in peppermint oil.
Not reportedTaxonComparator
Verbatim
e0“Mineral fertilization seemed to increase the content of menthol in the oil”
Claim · model-written summary
Mineral fertilization decreased menthone and β‐caryophyllene contents in peppermint oil.
Not reportedTaxonComparator
Verbatim
e0“Mineral fertilization seemed to increase the content of menthol in the oil, and decreased that of menthone and β‐caryophyllene”
Claim · model-written summary
Peppermint oils differed in inhibition across the 25 microorganisms tested.
Not reportedTaxon
Verbatim
e0“The oil samples showed a different degree of inhibition against the twenty‐five microorganisms tested”
Claim · model-written summary
Oil from autumn-planted peppermint was more active than spring-planted oil against some microorganisms.
- Treatment
- autumne0
- Outcome
- active against some microorganismse0
- Direction
- more activee0
- Comparator
- spring planted cropse0
Not reportedTaxon
Verbatim
e0“Some differences were found between the oil samples from autumn and spring planted crops, the former being more active against some microorganisms”
Claim · model-written summary
Oil from fertilized peppermint appeared slightly more effective overall against microorganisms.
- Taxon
- peppermint
Mentha ×piperitae0 - Treatment
- fertilized pepperminte0
- Outcome
- effectivee0
- Direction
- slightly more effectivee0
- Qualifier
- seemed to be, on the wholee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the oil samples from fertilized peppermint seemed to be, on the whole, slightly more effective”
Claim · model-written summary
Peppermint oil showed marked antifungal activity against Aspergillus niger.
- Taxon
- PeppermintMentha ×piperitae0
- Outcome
- antifungal activitye0
- Qualifier
- markede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peppermint oil exhibited a marked antifungal activity against Aspergillus niger”
The same questions in other papers
sowing time · molecular: metabolites · Mentha x piperita (peppermint)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
fertilization · molecular: metabolites · Mentha x piperita (peppermint)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
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.