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一杯水分辨出鸡蛋的好坏?
2017-08-15 07:12:29 中国青年网
吃变质的鸡蛋会对人的健康造成极大的危害,尤其是老人、小孩、孕妇等体制较差的人,吃了可能引起中毒。尤其是夏季天热,鸡蛋相比别的季节更容易坏。有网友推荐一种把鸡蛋放进水里就能分辨出好坏的方法,这是真的吗?
准备物品:水,鸡蛋
第一步:把鸡蛋放在冷水盆中,水面高度约为鸡蛋高度的两倍。
第二步:如果鸡蛋平躺在水底,说明很新鲜。新鲜的鸡蛋会沉到碗底,而且可能是侧面贴着碗底;可如果倾斜或直立在水中,说明存放的时间较长了;有点不新鲜的鸡蛋(大概放了一周的)也会沉到碗底,不过会有轻微的上下浮动。而如果浮在水面上,说明鸡蛋已经变质了,就不要吃。
由于鸡蛋放的时间越长,鸡蛋里的物质失去的水分和二氧化碳就越多,蛋壳里的气室也就越大。而气室变大后,鸡蛋就更容易漂浮在水上。
本报记者 方月宁
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