Noun:

1. a process that uses heat to separate a substance into its components

2. separation into portions

fractions形态fractionn.小部分；少许；分数；片段fraction of inspiratory oxygen吸入氧比例fractionating rectifying tower[化] 精馏塔Fractions of organic phosphorus有机磷组分fraction of number of particles[化] 粒子数分数fraction labelled mitosis curve标记分裂分数曲线fractionation of humic substance腐殖物质分级fraction -association movement党社运动fraction N frequency synthesizer小数频率合成器Fractionation and reconstitution分离重组Fractions from Gastrodia Rhizome天麻提取物

fractionation curve分馏曲线

cell fractionation细胞分级分离

elution fractionation洗提分级

fractionation column分级柱

isotope fractionation同位素分离

fractionation tower分馏塔

density fractionation密度分离法

intermittent fractionation间歇分馏

fractionation factor分离系数

extraction fractionation萃取分级

foam fractionation泡沫分级分离

fractionation effect分馏效应

isoelectric fractionation等电点分离

chromatographic fractionation色谱分离法

isotopic fractionation同位素分馏,同位素分级

diffusional fractionation扩散分馏

fractionation precipitation分级沉淀