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鸡蛋的蛋黄煮熟后为什么变黑

更新时间: 2020-10-23 00:00:00     

只是表皮变黑而不是整个变黑,蛋白质含有较多的蛋氨酸,经过长时间加热后,蛋氨酸能分解出硫化物,它与蛋黄中的铁物质发生反应,在蛋黄的周围形成绿色或灰绿色的硫化铁,颜色逐渐变深,导致蛋黄煮出来是黑色的一样。

关键词: 鸡蛋 蛋黄 为什么

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