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首页> 外文期刊>Molecules >Comparison of Antioxidant Activities of Melanin Fractions from Chestnut Shell
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Comparison of Antioxidant Activities of Melanin Fractions from Chestnut Shell

机译：板栗壳黑色素组分的抗氧化活性比较

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摘要

Chestnut shell melanin can be used as a colorant and antioxidant, and fractionated into three fractions (Fr. 1, Fr. 2, and Fr. 3) with different physicochemical properties. Antioxidant activities of the fractions were comparatively evaluated for the first time. The fractions exhibited different antioxidative potential in different evaluation systems. Fr. 1, which is only soluble in alkaline water, had the strongest peroxidation inhibition and superoxide anion scavenging activity; Fr. 2, which is soluble in alkaline water and hydrophilic organic solvents but insoluble in neutral and acidic water, had the greatest power to chelate ferrous ions; and Fr. 3, which is soluble both in hydrophilic organic solvents and in water at any pH conditions, had the greatest hydroxyl (center dot OH) and 1,1-diphenyl-2-picryl-hydrazyl (DPPH center dot) radicals scavenging abilities, reducing power, and phenolic content. The pigment fractions were superior to butylated hydroxytolune (BHT) in center dot OH and DPPH center dot scavenging and to ethylene diamine tetraacetic acid (EDTA) in the Fe2+-chelation. They were inferior to BHT in peroxidation inhibition and O2 center dot(-) scavenging and reducing power. However, BHT is a synthetic antioxidant and cannot play the colorant role. The melanin fractions might be used as effective biological antioxidant colorants.
机译：栗壳黑色素可用作着色剂和抗氧化剂，并可分为具有不同理化性质的三个部分（Fr.1，Fr.2和Fr.3）。首次比较了馏分的抗氧化活性。这些馏分在不同的评估系统中表现出不同的抗氧化潜能。神父1，仅溶于碱性水，具有最强的过氧化抑制和超氧阴离子清除活性;神父2，可溶于碱性水和亲水性有机溶剂，但不溶于中性和酸性水，具有最大的螯合亚铁离子的能力;和神父。 3在任何pH条件下均可溶于亲水性有机溶剂和水中，具有最大的羟基（中心点OH）和1,1-二苯基-2-吡啶基-肼基（DPPH中心点）自由基清除能力，降低了功率和酚含量。颜料级分在中心点OH和DPPH中心点清除方面优于丁基化羟基甲苯（BHT），在Fe2 +螯合方面优于乙二胺四乙酸（EDTA）。它们在过氧化抑制和O2中心点（-）清除和还原能力方面不如BHT。但是，BHT是合成抗氧化剂，不能起到着色剂的作用。黑色素级分可用作有效的生物抗氧化剂着色剂。

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