带鱼发黄是怎么回事?

2024-11-03 12:31:19
推荐回答(5个)
回答1:

发黄的带鱼其实是已经变质了,吃了对人体健康有害,所以选购带鱼时一定要注意带鱼是否发黄了,也不要吃发黄的带鱼。带鱼是一种含脂肪较高的鱼,当保管不好,鱼体表面的脂肪因大量接触空气而加速氧化,氧化的产物就使鱼体表面产生了黄色。

带鱼为发黄因为新鲜的带鱼表面会有一层银白色的银鳞,这是带鱼独有的一个特点,这层银鳞是由特殊的脂肪形成的,营养价值比较高。带鱼存放不当或者存储的时间过长,这层银鳞就会和空气接触发生氧化反应,导致发黄。我们可以利用这一点来判断带鱼是否变质。


扩展资料:

吃了发黄带鱼会导致急性肠胃炎带鱼发黄后,鱼肉中含有的蛋白质会被空气中的微生物分解,引起变质,释放有毒物质,还会滋生许多有害细菌。如果被人食用后,可能导致急性肠胃炎,发生呕吐,腹痛,腹泻、发烧等症状。

新鲜带鱼为银灰色,且有光泽,但有些带鱼却在银白光泽上附着一层黄色的物质。这是鱼体表面脂肪因大量接触空气而加速氧化的产物。

导致食物中毒,食用发黄带鱼还有可能引起食物中毒,发生皮肤潮红、头痛、皮疹、瘙痒、恶心、呕吐、腹痛、腹泻等食物中毒症状,严重者有脱水或者休克的危险。

参考资料来源:人民网—新鲜带鱼为银灰色 莫买黄色的易腐烂发臭

回答2:

这是由于鱼体表面脂肪(鱼鳞)因大量接触空气而加速氧化的现象。

为了避免冷冻的带鱼发黄,要用保鲜袋密封,避免冷冻带鱼块接触倒空气,并且要避免中途解冻,解冻了就要及时吃掉,不能二次冷冻。

处理发黄的带鱼可以用丝瓜络或者粗糙的洗碗布,将表面的黄色鱼鳞擦去,闻一闻鱼肉是否有臭味,并且捏一下带鱼肚子部位是否塌软,没有的话则可以进行烹饪食用,否则就丢弃。

带鱼肉含丰富的蛋白质、脂肪,还含有磷、铁、钙、锌、镁以及维生素A、B1、B2等多种营养成分。且含有丰富的镁元素,对心血管系统有很好的保护作用,有利于预防高血压、心肌梗死等心血管疾病。

扩展资料:

带鱼鳞的价值

带鱼体表的细鳞,是一层由特殊脂肪形成的表皮,称为“银脂”,是一种营养价值较高的优质脂肪。

新鲜带鱼的鱼鳞含较多卵磷脂,具有溶解胆碱的功能,可避免脑血管中含胆碱量过高而影响记忆力。并且还含不饱和脂肪酸,对降低胆固醇有一定功效。

另外,除带鱼厚度等,鱼鳞其实也是挑选新鲜带鱼的标志之一。好带鱼体表有光泽,鱼鳞呈灰白色或银白色且分布均匀

参考资料来源:百度百科--带鱼

参考资料来源:新华网--吃带鱼别刮鳞

回答3:

你买的鱼都发黄了呀,那就是快要坏了。让我给你讲下带鱼变黄的原因:

新鲜的带鱼是银灰色的,有光泽,但是有的带鱼附着一层黄色物质,这是带鱼表面的脂肪氧化的结果。带鱼含的脂肪较多,保存不好,预提表面的脂肪因为大量接触空气而加速氧化,氧化的产物使鱼体表面产生黄色。所以带鱼发黄是变质的开始,但轻微的脂肪氧化还没有达到腐败的程度,尚可食用。购买带鱼时,尽量不要买鱼体有黄色的,如果买了就要尽快吃了,否则鱼会很快腐烂发臭。

这样给你解释你能明白吗?

回答4:

变质了,不能吃了。否则会食物中毒,症状上吐下泻,还恶心,没有食欲,浑身无力

回答5:

不新鲜了,可以不吃的。

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