Abstract
UNLABELLED: The plants belonging to Lamiaceae family are widely used in medicine, cosmetic and food industry. Besides volatile oils, the main constituents of these plants are polyphenols. These compounds are secondary metabolites with multiple biological activities useful in the prevention and treatment of many disorders. AIM: To determine the flavonoids. hydroxycinnamic acids and total polyphenols content in several aromatic Lamiaceae plants available in Romanian pharmacies as herbal tea products: Melissa officinalis, Lavandula officinalis, Rosmarinus officinalis, Mentha piperita, Thymus vulgaris and Salvia pratensis. MATERIAL AND METHODS: The quantitative determination of different types of polyphenols was performed in ethanolic extracts 70% and 50%, respectively, of each sample, using spectrophotometric methods. RESULTS AND DISCUSSION: The total polyphenols levels in the investigated products ranged between 3.10% and 6.51% (expressed as g GAE/100 g dry weight), the largest amount being identified in Melissa officinalis (6.51%). The samples of Salvia pratensis and Mentha piperita were the richest in flavonoid derivatives expressed as g rutin/100 g dry weight (1.83% and 1.53%, respectively), the optimal extraction being with 70% ethanol. The highest content in hydroxycinnamic acids expressed as g rosmarinic acid/100 g dry weight was found in Melissa officinalis sample (4.15%). CONCLUSIONS: There is a wide variability of polyphenolic content not only by species, but also depending on the polyphenols type or solvent used for extraction. The best extraction rate of total polyphenols in the investigated Lamiaceae species was obtained with 50% ethanol.
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Claims 8
Claim · model-written summary
Total polyphenols ranged from 3.10% to 6.51% in sampled products.
Not reportedTaxonDirection
Verbatim
e0“The total polyphenols levels in the investigated products ranged between 3.10% and 6.51%”
Claim · model-written summary
Melissa officinalis had the largest total polyphenol amount, 6.51%.
- Taxon
- Melissa officinalis
Melissa officinalise0 - Outcome
- largest amounte0
- Direction
- largeste0
- Value
- 6.51%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the largest amount being identified in Melissa officinalis (6.51%)”
Claim · model-written summary
Salvia pratensis had 1.83% flavonoid derivatives.
- Taxon
- Salvia pratensis
%2C_Hartelholz%2C_M%C3%BAnich%2C_Alemania%2C_2020-06-20%2C_DD_73-82_FS.jpg?width=60)
Salvia pratensise0 - Outcome
- flavonoid derivativese0
- Direction
- richeste0
- Value
- 1.83%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Hartelholz%2C_M%C3%BAnich%2C_Alemania%2C_2020-06-20%2C_DD_73-82_FS.jpg?width=500)
Verbatim
e0“The samples of Salvia pratensis and Mentha piperita were the richest in flavonoid derivatives expressed as g rutin/100 g dry weight (1.83% and 1.53%, respectively)”
Claim · model-written summary
Mentha piperita had 1.53% flavonoid derivatives.
- Taxon
- Mentha piperita
Mentha ×piperitae0 - Outcome
- flavonoid derivativese0
- Direction
- richeste0
- Value
- 1.53%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The samples of Salvia pratensis and Mentha piperita were the richest in flavonoid derivatives expressed as g rutin/100 g dry weight (1.83% and 1.53%, respectively)”
Claim · model-written summary
Seventy-percent ethanol was optimal for flavonoid extraction.
Not reportedTaxon
Verbatim
e0“the optimal extraction being with 70% ethanol”
Claim · model-written summary
Melissa officinalis had the highest hydroxycinnamic acid content, 4.15%.
- Taxon
- Melissa officinalisMelissa officinalise0
- Outcome
- content in hydroxycinnamic acidse0
- Direction
- higheste0
- Value
- 4.15%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest content in hydroxycinnamic acids expressed as g rosmarinic acid/100 g dry weight was found in Melissa officinalis sample (4.15%)”
Claim · model-written summary
Polyphenolic content varied by species, polyphenol type and solvent.
- Outcome
- polyphenolic contente0
- Qualifier
- by species, but also depending on the polyphenols type or solvent used for extractione0
Not reportedTaxonDirection
Verbatim
e0“There is a wide variability of polyphenolic content not only by species, but also depending on the polyphenols type or solvent used for extraction”
Claim · model-written summary
Fifty-percent ethanol gave the best total polyphenol extraction rate.
Verbatim
e0“The best extraction rate of total polyphenols in the investigated Lamiaceae species was obtained with 50% ethanol”