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Total phenolic content (TPC) of different extracts of V. vinifera stem (CYHA: Cyclohexane; DCM: Dichloromethane; EtOAc: Ethyl acetate; MeOH: Methanol). Extracts were tested at 50 µg/mL Means values ± SD (n = 3); Different letter on the histograms means a significant difference (p ≤ 0.05).
