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蚕豆煮汤为什么变红
更新时间: 2020-10-03 00:00:00  

蚕豆煮汤变红原因:

蚕豆在保管期间豆粒会变色。一般认为是蚕豆皮内有酚物质和多元酚氧化酶缘故。正常的蚕豆一般为青绿色或乳白色,在保管过程中,皮色往往逐渐变为淡褐色、褐色、深褐色或黑色。高温高水分能使氧化酶的活性加强,促进了氧化反应,加剧了变色过程,所以蚕豆煮汤会变红。

关键词: 蚕豆 为什么

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