There is an interest in finding new and safe antioxidants from natural sources such as medicinal plants. Objectives: The aim of this study was to evaluate the antioxidant activity of ten Iranian medicinal plants extracts. Materials and Methods: For antioxidant activity, the radical scavenging activity, reducing power and phenolic contents of ethanol plant extracts were determined. Gallic acid was used as standard reference with well-documented antioxidant activity. Results: The highest antioxidant activity in terms of DPPH radical scavenging was found in Verbascum sinuatum L. Var (VS) with an IC50 equal to 263.52 ± 5.981 μg/ml and Rosa damascena Mill (RD) with and IC50 equal to 287.9 ± 5.675 μg/ml that are higher than gallic acid (IC50 = 25.32 ± 5.593 μg/ml). The highest antioxidant activity in terms of ferric reducing capacity was also found in Verbascum sinuatum L. Var extracts (in 85.08 ± 8.66 μg/ml concentration with absorbance 0.5). Also, this extract contains the highest phenolic compounds (8.53 ± 0.11 mg/g). Conclusion: In this study, Verbascum sinuatum L. Var contains the highest level of phenolic compounds may be contribute to higher free radical scavenging activity and reducing power in comparison to the other plant extracts. Therefore this plant is a good candidate as natural antioxidant.
展开▼
机译:从天然来源例如药用植物中寻找新的和安全的抗氧化剂是有兴趣的。目的:本研究的目的是评估十种伊朗药用植物提取物的抗氧化活性。材料和方法:为测定抗氧化活性,测定了乙醇植物提取物的自由基清除活性,还原能力和酚含量。没食子酸被用作具有充分证明的抗氧化剂活性的标准参考。结果:就清除DPPH自由基而言,发现在Verbascum sinuatum L. Var(VS)中具有最高的抗氧化活性,IC50等于263.52±5.981μg/ ml,Rosa damascena Mill(RD)的IC50等于287.9±5.675μg / ml高于没食子酸(IC50 = 25.32±5.593μg/ ml)。在三叶草(Verbascum sinuatum L. Var)提取物中还发现了最高的抗氧化活性,以铁还原能力计(浓度为85.08±8.66μg/ ml,吸光度为0.5)。此外,该提取物还含有最高的酚类化合物(8.53±0.11 mg / g)。结论:在本研究中,与其他植物提取物相比,藜芦含有最高含量的酚类化合物,可能有助于更高的自由基清除活性和降低功率。因此,该植物是天然抗氧化剂的良好选择。
展开▼