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为什么山药烧出来会变黑

更新时间: 2020-09-19 00:00:00     

1、去皮山药发生酶的褐变导致颜色变深,褐变的发生主要有条件分别是存在多酚勒物质,多酚氧化酶和氧;

2、山药削皮后暴露在空气中,其中的多酚类物质和氧发生反应产生邻醌,再进一步氧化聚合而成褐色素和黑色素;

3、铁锈污染,山药中某些成分与金属发生氧化作用导致变黑。

关键词: 为什么 山药 出来

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