天气预报 > 其他 > 为什么山药去皮后发黑
为什么山药去皮后发黑
更新时间: 2020-11-04 00:00:00  

山药去皮后发黑原因是山药中含有丰富的多酚类物质,多酚类物质会在氧气和多酚氧化酶的作用下氧化生成黑色的醌类物质。山药去皮后不发黑的办法是在去皮前先往山药里加上一小掇盐,然后泡几分钟后再去皮,这样去皮后的山药就不会发黄变黑了。

关键词: 为什么 山药 发黑

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