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吃火锅放藕片之前用煮熟吗
更新时间: 2020-10-02 00:00:00  

莲藕中的物质与空气中的氧分子接触产生的化学反应,莲藕中含有一种化学成分,即单宁,又称鞣质。莲藕被切开和去皮后,暴露在空气中就会变成褐色。变色的原因是由于氧化作用,单宁中的酚类产生醌的聚合物形成褐色素,也就是黑色素,莲藕主要是和调料里面成分反应变黑而已,不会有问题。

关键词: 火锅 藕片 之前

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