Companies using the milk for further production (e.g. of powdered infant formula) normally check the proteinlevel through a test measuring nitrogen content.
而使用牛奶进行下一步加工(比如婴幼儿配方奶粉)的公司，一般通过测量含氮量来检测蛋白质含量。
2
The composing of embryo proteins and rule of gene sequential expression at proteinlevel can be discussed by researching the proteins of every embryo development stage of silkworm.
通过家蚕各个时期胚胎蛋白质的研究，可以从蛋白质水平探讨胚胎蛋白质的构成和基因顺序表达的规律。
3
Scientific tests have found they have a higher proteinlevel.