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Phenolic compounds of Pyrus communis fruit methanol extract and evaluation of antioxidant activity

机译:Pyrus communis果实甲醇提取物的酚类化合物和抗氧化活性的评价

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Pear ( Pyrus communis .) fruit is popular among consumers due to its high nutritive value, good taste and low caloric level. This study examined polyphenolic content, antioxidant activity and phenolic profile of methanol extract of Pyrus communis fruit. Extract were screened for possible antioxidant activities using free radical scavenging activity of DPPH, hydroxyl scavenging activity and reducing power assays. This extract contain high polyphenolic and flavonoids contents (172.5 ± 0.005 mg GAE/g dry extract and 5.34 ± 0.003mg QE/g dry extract) respectively. Similarly, this extract showed high antioxidant activity using DPPH, hydroxyl radical scavenging and reducing power with an IC 50 value of 0.682 ± 0.022 mg/ml, 0.47 ± 0.06 mg/ml and 1.17 ± 0.029 mg/ml respectively. The phenolic profile in the methanolic extracts was investigated using Ultra high liquid chromatography (UPLC). Four different phenolic acids gallic acid, chlorogenic acid, hydroxybenzoic acid and protocatechuic acid have been identified. Some flavonoids have also been identified such as rutin and kaempherol derivative. In conclusion, the present study showed that Pyrus communis exhibited good antioxidant activity which is probably related to phenolics and flavonoids present in the extract.
机译:梨(Pyrus Communis。)果实在消费者中很受欢迎,因为它的营养价高,味道良好和低热量水平。该研究检测了Pyrus Communis果实甲醇提取物的多酚含量,抗氧化活性和酚醛概况。使用DPPH,羟基清除活性的自由基清除活性,降低功率测定,筛选提取物的抗氧化活性。该萃取液含有高多酚和黄酮含量(172.5±0.005mg Gae / G干燥提取物和5.34±0.003mg / g干燥提取物)。类似地,该提取物使用DPPH,羟基自由基清除和降低功率,通过IC 50值为0.682±0.022mg / ml,0.47±0.06mg / ml和1.17±0.029mg / ml,达到高抗氧化活性。使用超高液相色谱法(UPLC)研究了甲醇提取物中的酚醛型。已经鉴定了四种不同的酚醛酸,绿原酸,羟基苯甲酸和ProtocateChuic酸。还鉴定了一些黄酮类化合物,例如芦丁和Kaempherol衍生物。总之,本研究表明,Pyrus Communis表现出良好的抗氧化活性,其与提取物中存在的酚类和黄酮类有关。

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