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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical and Spectrophotometric Characterization of the Propolis Antioxidants Properties
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Electrochemical and Spectrophotometric Characterization of the Propolis Antioxidants Properties

机译：蜂胶抗氧化剂性能的电化学和分光光度法表征

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In this work, ethanol extracts of propolis from Europe, before and after 10 years of storage, were preparedand investigated by electrochemical methods, FTIR, and UV-Vis spectrometry assays. A combination ofelectrochemistry (cyclic and differential pulse voltammetry) and spectrometry allowed for theestablishment of chemical correlation between the composition and the activities of bioactivepolyphenols. Based on the content of the individual components and their content groups, the antioxidantproperties of propolis precursors were characterized. Extracts of propolis before (ExI) and after 10 years(ExII) of storage were irreversibly oxidized in at least two electrode stages. ExII was oxidized moredifficultly than ExI, and revealed better antioxidant properties. The antiradical and overall antioxidantpotentials of the substances present in the extract of propolis after 10 years of storage, have beendemonstrated in this paper. The storage time (10 years) did not significantly alter the properties ofpropolis, as evidenced by the high potential for free radical scavenging (ABTS, DPPH) and reduction ofmetal ions. Some of the materials present in propolis have been oxidized, and as confirmed by the FTIRanalysis, this facilitates the passage of polyphenols from the propolis into the anhydrous (ethanol oracetonitrile) environment. Thus, propolis, as a rich source of natural phytocompounds, may be used inthe prevention of various free radical-related ailments.
机译：在这项工作中，欧洲蜂胶的乙醇提取物在储存10年之前和之后都进行了制备，并通过电化学方法，FTIR和UV-Vis光谱分析进行了研究。电化学（循环和微分脉冲伏安法）和光谱法的组合允许在组成和生物活性多酚活性之间建立化学相关性。基于各个组分的含量及其含量基团，表征了蜂胶前体的抗氧化性能。储存前（ExI）和储存10年（ExII）后的蜂胶提取物在至少两个电极阶段被不可逆地氧化。 ExII比ExI更难被氧化，并显示出更好的抗氧化性能。本文已经证明了蜂胶提取物在储存10年后存在的抗自由基和总体抗氧化能力。储存时间（10年）并没有显着改变蜂胶的性能，这有很高的清除自由基（ABTS，DPPH）和还原金属离子的潜力。蜂胶中存在的某些物质已被氧化，并且通过FTIR分析证实，这有利于多酚从蜂胶进入无水（乙醇或乙腈）环境。因此，蜂胶作为天然植物化合物的丰富来源，可用于预防各种与自由基有关的疾病。

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