推荐回答(5个)
牛肉含有足够的维生素B6,可加强免疫力,增进蛋白质的新陈代谢和合成,从而有助于紧张练习后身体的恢复。牛肉含铁丰富,铁是造血必须的矿物资。牛肉与鸡、鱼相比较,牛肉含铁质更丰富。
1、闻:用鼻子闻,新鲜牛肉具有正常的气味。较次的肉有一般氨味或者酸味,变质牛肉有不正常的刺鼻臭味。
2、摸:(1)有弹性。新鲜牛肉具有弹性,指压后的凹陷能立即恢复;次肉弹性差,指压后的凹陷恢复很慢,甚至不能完全恢复,变质牛肉没有弹性;(2)摸粘度。新鲜牛肉表面微干或微湿润,不粘手;次新鲜牛肉外表干燥或者粘手,新切面湿润粘手;变质的牛肉切面严重粘手,外表极其干燥。但是要注意一点,有些灌水的牛肉也完全不粘手,但可见到其外表呈现水湿样,不结实。

3、看:(1)看牛肉皮表层有无红点,无红点的肉是好牛肉,有红点的肉是次牛肉,甚至坏肉。(2)看肌肉。新鲜牛肉有光泽,红色均匀;较次的牛肉,肉色稍微暗淡。(3)看脂肪。新鲜的牛肉的脂肪洁白或者呈淡黄色;次品牛肉的脂肪缺乏光泽;变质的牛肉脂肪灰绿色。
4、色泽:新鲜牛肉呈淡红色、红色或者深红色(老牛),切面有光泽。
5、肌纤维性状:新鲜牛肉肌纤维较细,肉眼观察断面似有颗粒状感。
6、脂肪:新鲜牛肉脂肪呈黄色或者白色(水牛),而且硬而脆,揉搓时容易碎。
7、气味:新鲜牛肉具有固有的腥味,正常的气味。

注水牛肉特征如下:
牛肉注水后,肉纤维更显得粗糙,暴露纤维明显;因为注水后,使牛肉有鲜嫩感,但仔细观察肉面,常会有水分渗出;用手去摸牛肉,不粘手,湿润感觉重;用干纸贴在牛肉表面,纸很快即被湿润透,而且正常牛肉手摸不粘手,纸贴不透湿。
挑选牛肉应该选择新鲜的牛肉1.从弹性上来识别,新鲜的牛肉只鸭后能快速恢复原状,2.可以从粘不粘手来辨认,新鲜的牛肉表面微干,摸的时候不粘手,有点光滑,3.可以闻一闻,新鲜的牛肉闻起来有一股浓郁的肉味儿,还有一股草腥味儿。
首先挑选牛肉,首先要看它的颜色,颜色要比较暗红色的是品质比较好的,牛肉最好不要选颜色太过鲜艳的。第2点就是看牛肉的触感,正常的牛肉触感是没有那么的光滑的,是比较的粗糙的,所以选牛肉,看到那些非常光滑的一定不要选。
挑选牛肉看色泽,比较红润的肉质是新鲜的,如果有点暗红色,可能放了很久了,不太新鲜。
挑选牛肉,选择新鲜嫩的牛肉部位,一头牛脸部上的肉质是最鲜嫩的,也是口感最好的。
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