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Phenolic compounds and antioxidant activity of Nepeta nuda subsp. Albiflora

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Teber I., Bursal E.

International Letters of Natural Sciences

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2020

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tom 79

Phenolic content and antioxidant activity of Nepeta nuda subsp. albiflora Boiss. were reported in this study. The ethanol and water extracts of Nepeta nuda subsp. albiflora were prepared and used for biochemical analyses. Antioxidant capacities of the extracts were evaluated by three different in vitro bioanalytical methods including a reducing antioxidant method and two radical scavenging antioxidant methods. The water and ethanol extracts of the plant sample were found to have effective antioxidant potentials. Phenolic content of Nepeta nuda subsp. albiflora was determined by high performance liquid chromatography (HPLC). Rosmarinic acid (182.0±4.5 µg/g), apigenin (84.5±57.6 µg/g), and quercetin (44.5±62.9 µg/g) were identified as major compounds in the ethanol extract of the plant sample. This study has a potential scientific base for further studies about Nepeta nuda subsp. albiflora related to plant biochemistry and plant based pharmacological industry.

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LC-MS/MS analysis of phenolic compounds and in vitro antioxidant potential of Stachys lavandulifolia Vahl.var. brachydon Boiss

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Bingol M. N., Bursal E.

International Letters of Natural Sciences

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2018

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tom 72

The identification and quantification of phenolic compounds of Stachys lavandulifolia Vahl. var. brachydon Boiss. by LC-MS/MS (Liquid Chromatography- tandem Mass Spectrometry) technique is the main purpose of the current study. The high concentrations of quinic acid (2534± 12 ppb) and chlorogenic acid (1882±92 ppb) were detected by LC-MS/MS.. Another goal of the study is to evaluate the antioxidant activities of both ethanol and aqueous extracts of the plant material. The antioxidant potentials of extracts were determined by using five different in vitro methods including; ABTS (2,2′-Azino-bis-3-ethylbenzothiazoline-6-sulfonic acid), DPPH(1,1- diphenyl-2-picryl-hydrazyl), FRAP (Ferric ions Reducing Antioxidant Power), CUPRAC (Cupric ions Reducing Antioxidant Power), and ferric thiocyanate methods. The results revealed that the aqueous and ethanol extracts of S. lavandulifolia leaves have good antioxidant potential with high phenolic content.

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Identification of bioactive polyphenolic compounds and assessment of antioxidant activity of Origanum acutidens

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Aras A., Silinsin M., Bingol M. N., Bursal E.

International Letters of Natural Sciences

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2017

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tom 66

The main objective of the current work is to search the antioxidant activities of Origanum acutidens leaves by using DPPH, FRAP and CUPRAC methods severally. Three well known antioxidant compounds (BHA, BHT and ascorbic acid) were used as standards for comparing the extracts. Also, phenolic compounds of Origanum acutidens leaves were identified by UHPLC-ESI-MS/MS. The high concentrations of rosmarinic acid (11158.99 ppb) quinic acid (3200.84 ppb) and naringenin (1238.45 ppb) were detected quantitatively.

Ograniczanie wyników

3 International Letters of Natural Sciences

3 Bursal E.

2 Bingol M. N.

1 Aras A.

1 Silinsin M.

1 Teber I.

1 2020

1 2018

1 2017

Phenolic compounds and antioxidant activity of Nepeta nuda subsp. Albiflora

LC-MS/MS analysis of phenolic compounds and in vitro antioxidant potential of Stachys lavandulifolia Vahl.var. brachydon Boiss

Identification of bioactive polyphenolic compounds and assessment of antioxidant activity of Origanum acutidens