Abstract
Abstract Samples of Origanum vulgare ssp. hirtum were collected from the same geographic area in the south of Croatia at different seasons of growth. The maximum fluctuations found for the main components from fresh plant material were: thymol [149.2–1124.4 mg (100 g)–1], carvacrol [51.6–564.3 mg (100 g)–1], p-cymene [20.2–220.9 mg (100 g)–1] and γ-terpinene [50.1–217.5 mg (100 g)–1]. The oregano that was analysed belonged to a thymol/carvacrol chemotype. The season of collecting affected the qualitative and quantitative composition of the essential oil. The most impressive difference was the increase of p-cymene content in August. After the drying of the plant material, all samples showed a minor decrease in essential oil yields when compared with fresh plants. Drying, at room temperature, had no effect on the qualitative composition of oregano oil. Because of the variability of essential oil compositions from seasonally collected fresh and dried oregano, it would be important to check the quantity and quality of such components before usage.
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Claims 10
Claim · model-written summary
Fresh oregano thymol fluctuated across seasons.
- Taxon
- Origanum vulgare ssp. hirtum
Origanum vulgare subsp. hirtume1 - Outcome
- thymole0
- Value
- 149.2–1124.4 mg (100 g)–1e0
- Setting
- Croatiat0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thymol [149.2–1124.4 mg (100 g)–1]”
e1“Samples of Origanum vulgare ssp. hirtum”
t0“Origanum vulgare L. ssp. hirtum grown wild in Croatia”
Claim · model-written summary
Fresh oregano carvacrol fluctuated across seasons.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- carvacrole0
- Value
- 51.6–564.3 mg (100 g)–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carvacrol [51.6–564.3 mg (100 g)–1]”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Fresh oregano p-cymene fluctuated across seasons.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- p-cymenee0
- Value
- 20.2–220.9 mg (100 g)–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“p-cymene [20.2–220.9 mg (100 g)–1]”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Fresh oregano γ-terpinene fluctuated across seasons.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- γ-terpinenee0
- Value
- 50.1–217.5 mg (100 g)–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“γ-terpinene [50.1–217.5 mg (100 g)–1]”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
The oregano belonged to a thymol/carvacrol chemotype.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- thymol/carvacrol chemotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The oregano that was analysed belonged to a thymol/carvacrol chemotype”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Collection season affected essential oil composition.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- qualitative and quantitative composition of the essential oile0
- Setting
- season of collectinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The season of collecting affected the qualitative and quantitative composition of the essential oil”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Oregano p-cymene content increased in August.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- p-cymene contente0
- Direction
- increasee0
- Setting
- Auguste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase of p-cymene content in August”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Drying slightly decreased essential oil yields relative to fresh plants.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Treatment
- dryinge0
- Outcome
- essential oil yieldse0
- Direction
- decreasee0
- Comparator
- fresh plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the drying of the plant material, all samples showed a minor decrease in essential oil yields when compared with fresh plants”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
Room-temperature drying did not alter qualitative oregano oil composition.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Treatment
- Drying, at room temperaturee0
- Outcome
- qualitative composition of oregano oile0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying, at room temperature, had no effect on the qualitative composition of oregano oil”
e1“Origanum vulgare ssp. hirtum”
Claim · model-written summary
The authors recommend checking oil component quantity and quality before use.
- Taxon
- Origanum vulgare ssp. hirtumOriganum vulgare subsp. hirtume1
- Outcome
- check the quantity and quality of such components before usagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“important to check the quantity and quality of such components before usage”
e1“Origanum vulgare ssp. hirtum”
The same questions in other papers
processing · yield · Origanum vulgare (oregano)Positive and negative results
2 in the opposite direction
- positive
- positive
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.