The electrophoresis picture of ammonium sulfate fractionate porcine serum protein ( ph4.5 )
硫酸铵分级盐析血清蛋白(ph4.5)
They used liquid and gas chromatography to fractionate the sample into its molecular constituents ; an electron beam then fragmented the separated molecules in a mass spectrometer to produce a spectrum indicating the basic chemical components .
Ultrafiltration is used widely to concentrate and fractionate milk prior to cheese production and to separate whey proteins from whey .
超滤广泛的应用于干酪生产前乳的浓缩与分级，以及从乳清中分离乳清蛋白。
Consequently , we must clarify the meanings of supervision system after administrational decision , expand its principal part , fractionate its content and constitute corresponding system .
