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- acetone fractional precipitation 丙酮分级沉淀
- Fractional precipitation of ammonium sulphate 硫酸铵分级沉淀
- In this paper,humic acid extracted from different horzons Lou of soil was classified into 7 fractions according to the condensation degree by alcohol fractional precipitation technique,and the properties of the fractions were studied. 采用酒精分级沉淀法，按芳构化程度高低将土娄土不同层次胡敏酸分成7个级分，并对各级分的性质进行了研究。
- METHODS：TCS was obtained by the fractional precipitate with acetone from the homogenate of the root or the calli. 方法：采用丙酮沉淀方法，获得栝楼叶片愈伤和块根的蛋白提取物。
- Cartilage antuumor component (CATC) was isolated from a 1 mol/L guanidine hydrochloride extract of bovine cartilage by acetone fractioned precipitation and superfiltration. 采用盐酸胍抽提,丙酮分级沉淀,超滤等步骤从牛软骨中提取出软骨抗肿瘤组分(Cartilage antitumor component,CATC)。
- Keywords HCPE-g-MMA;fractional precipitation;trichloromethane;methanol.; 分级沉淀;三氯甲烷;甲醇;
- Speech is fractional; silence is integral. 讲话是分数; 沉默是整数。
- Modulation of Spinnable Polycarbosilane with a High Melting Point via Fractional Precipitation 沉淀分级法调制纺丝级高熔点聚碳硅烷
- The soil absorbs only a fraction of the rain that beats down. 土壤只吸收猛打到地面上的雨水的一部分。
- I'll be ready in a fraction of a second. 我马上就好。
- The story does not contain a fraction of truth. 这故事没有一点真实性。
- He has done only a fraction of his homework. 他只做了家庭作业的一小部分。
- Results Four glycoproteins fractionally precipitated all had noticeable elimination effects on three free radicals of DPPH,. 结果丹参糖蛋白的4种乙醇分级沉淀物对DPPH;.
- The car stopped within a fraction of an inch of the wall. 汽车在离墙不到一英寸的地方停住了。
- There will be precipitation on northern hills tonight. 今夜北部山区有降雪。
- Could you move a fraction closer? 你能不能稍微再挪近点儿?
- Precipitation in the form of pellets of ice and hard snow. 冰雹以冰和硬雪块颗粒的形式下落
- She spends only a fraction of her earnings. 她只花了所赚的钱的一小部分。
- Objective To determine the free radicals scavenging activities of glycoproteins from Salvia miltiorrhiza Bunge fractionally precipitated with the different concentrations of ethanol. 目的测定丹参糖蛋白4种浓度的乙醇分级沉淀物对自由基的清除作用。
- They represented only a fraction of the general populace. 他们代表的仅是全体国民的一小部分。
