int. j. chem. technol. International Journal of Chemistry and Technology 2602-277X İbrahim DEMİRTAŞ 10.32571/ijct.1288819 Structural Biology Agricultural Engineering Yapısal Biyoloji Ziraat Mühendisliği Antioxidant and oxidant status, DPPH activity, total phenolic and flavonoid contents of mountain tea (Sideritis libanotica subsp. kurdica (Bornm.) Hub.-Mor) https://orcid.org/0000-0003-0942-9658 Uysal İmran Osmaniye Korkut Ata Üniversitesi https://orcid.org/0000-0001-9083-1876 Mohammed Falah Saleh https://orcid.org/0000-0002-0104-7586 Koçer Oğuzhan OSMANIYE KORKUT ATA UNIVERSITY https://orcid.org/0000-0002-9429-2782 Doğan Muhittin GAZI UNIVERSITY https://orcid.org/0000-0001-7223-2220 Sevindik Mustafa OSMANIYE KORKUT ATA UNIVERSITY 06 30 2023 7 1 82 85 04 27 2023 06 26 2023 Copyright © 2017, International Journal of Chemistry and Technology 2017 International Journal of Chemistry and Technology

Samples of Sideritis libanotica subsp. kurdica (Bornm.) Hub.-Mor, often known as mountain tea, were gathered in Iraq and analyzed for their antioxidant and oxidant status, DPPH activity, total phenolic and total flavonoid contents. The plant's aerial parts were utilized for this purpose. The levels of antioxidants and free radicals were measured by Rel assay kits. The ability to scavenge free radicals was evaluated using the DPPH technique. Folin-Ciocalteu and aluminum chloride reagent are used. As a result TAS values of 7.934±0.179 mmol/L, TOS values of 10.626±0.275 µmol/L, and OSI values of 0.134±0.001. The total phenolic and flavonoid contents were found to be 129.75±2.37 and 111.47±3.15 mg/g, respectively. Furthermore, DPPH activity at 2 mg/mL was calculated to be 75.15±1.45 S. libanotica subsp. kurdica has been found to have antioxidant activity and is thus a viable natural antioxidant source in this context.

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