并改进了逐步沉淀分级工艺，对PCS进行沉淀分级，得到了窄分布的分级样品。
And by improving the craftwork of precipitation of PCS, the narrow molecular weight distribution of PCS was got.
本工作用甲苯作溶剂，乙醇作沉淀剂，用沉淀分级法，对溶聚丁苯橡胶（S-SBR）进行了分级。
Solution polymerized styrene-butadiene rubber ( S-SBR ) was fractionated by repeated precipitation method, using redistilled toluene as solvent and ethyl alcohol as precipitant.
采用高浓度醇溶液处理羊栖菜粉、稀酸提取、减压浓缩、乙醇分级沉淀和冷冻干燥等单元操作，可以获得褐藻糖胶产品。
The fucoidan product was obtained by pretreatment of algae powder with high concentration ethanol, diluted acid extraction, concentration under vacuum, ethanol precipitation and lyophilization.
将高炉冲渣水进行分级过滤、沉淀，利用冲渣水的余热，建立了高炉冲渣水余热供暖供热系统。
Through carrying out fractional filtration, depositing and using the waste heat of washing blast furnace slag water, the heating and district heating line system is set up.
本文报道采用分级分离并结合有机溶剂沉淀法，从牛眼中纯化出高纯度透明质酸，较其他方法简便，易形成规模。
This paper deals with the way of purifying highly purity hyaluronic acid from ox eye by fractionation and organic solvent precipitation.
采用80%的酸性乙醇提取、硅胶柱层析分离、乙醚分级沉淀、丙酮重结晶的工艺方法，从苦参中分离得到氧化槐果碱单体。
Besed on the extract with 80% acidities alcohol, separation by silica gel, precipitation by ether, oxysophocarpine was obtained from Sophora flavescens.
螺旋分级机借助固体颗粒的比重不同而在液体中沉淀的速度不同的原理，对矿石混合物进行洗净、分级。
Spiral classifier with different proportion of solid particles in the liquid precipitation rate of different principle, to wash the mixture of ore, grading.
在此基础上，研究成功一种“二步分级沉淀回收废液中硝酸铵”的方法。
Based on the results obtained from this analysis, a two-step precipitating and separating method to recover ammonium nitrate from the waste liquid has been developed.
一步法与硫酸铵分级沉淀法相比，方法简单，成本低廉，适宜工业化生产。
Compared with the latter, the one-step approach is simpler, cheaper and more suitable for industrial production.
同时用硫酸铵分级沉淀发酵液中的蛋白，SDS - PAGE法分析有活性的蛋白组分。
Protein in fermented broth was precipitated with ammonium sulfate and the active part was assayed by SDS-PAGE.
螺旋分级机借助固体颗粒的比重不同而在液体中沉淀的速度不同的原理，对矿石混合物进行分级。
Hierachial machine with different proportion of solid particles in the liquid precipitation speed different principle of minerals mixtures were classified.
采用热水抽提、乙醇分级沉淀等步骤从灵芝发酵全粉中初步筛得一种粗蛋白酶A抑制剂；
Through dipping in hot water and ethanol precipitation, a kind of proteinase A inhibitor can be selected from the powder of Ganoderma lucidum by submerged fermentation ;
采用热水抽提、乙醇分级沉淀等步骤从灵芝发酵全粉中初步筛得一种粗蛋白酶A抑制剂；
Through dipping in hot water and ethanol precipitation, a kind of proteinase A inhibitor can be selected from the powder of Ganoderma lucidum by submerged fermentation ;
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