萃取的

In this study, the CPE processes of four different kinds of polyaromatic hydrocarbons, acenaphthene, anthracene, phenanthrene and pyrene, with two kinds of silicone surfactants, DC-193 and DC-190, were studied separately, and four different assisting methods for the phase separation of the CPE process including heating at a higher temperature, adding salts, centrifugation and stirring were introduced, respectively.

今利用两种聚醚型有机硅表面活性剂DC-193和DC-190，对蒽、菲、芘和苊四种多环芳烃进行浊点萃取研究，分别使用加热、加盐、离心和搅拌等辅助方法改变相分离过程的速度。通过测定表面活性剂富集相的体积百分率Vs/随时间的变化和最终的萃取率，研究上述四种不同辅助方法对相分离行为和萃取性能的影响。

The extracting ability of substituted monoamide can be highly influenced by its structure, especially when it extracts te-travalent actinides.

取代单酰胺的萃取能力受结构的影响很大，尤其对 4价锕系元素，可以设计不同结构的酰胺来萃取分离4价和 6价锕系金属，国内外在该类萃取剂的性能研究方面做了大量工作。

Experimental results were processed and it was found that 1: 1 adduct of alcohol and acylate is formed in every extraction process, and that acylate can give higher extraction equilibrium constant for alcohol than the corresponding organic acid.

由实验数据回归出了络合剂与醇的络合比及络合萃取平衡常数。金属有机酸盐与醇的络合萃取平衡常数远远大于相应的有机酸与醇的络合萃取平衡常数。

Summed up the research progress that exceeds critical and extractive technology to apply at alkaloid to depart, analysed each elements of effect of influence alkaloid depart, outside waiting for common element except temperature, pressure, dissolvent, extractive time, alkalify reagent can improve the detached result of alkaloid, carry secretly agent rose to exceed the capacity of critical and extractive fluid.

综述了超临界萃取技术应用于生物碱分离的探究进展，分析了影响生物碱分离效果的各个因素，除温度、压力、溶剂、萃取时间等常见因素外，碱化试剂能够改善生物碱的分离效果，夹带剂则提高了超临界萃取流体的能力。

At low HNO3 concentration and dilution factor above 2, 0.1 mol/L DCH18C6/1-octanol extracts very little americium,plutonium and uranium.The distribution ratios of Am、Pu and U increase with the increase of HNO3 concentration in aqueous phase,and decrease with increasing of dilution factor of HLLW.The distribution ratio of extraction of Pu increases with the increase of extractant concentration.

研究结果表明，在低硝酸浓度和较大稀释倍数情况下，DCH18C6对镅、钚、铀的萃取分配比都比较小，并随着水相硝酸浓度的增大而增大，随着模拟高放废液稀释倍数的增大而减小，提高萃取剂浓度会增大四价钚的萃取。

There is a good market for betaine,So its synthetic method and purification have captured people's attention.

在介绍甜菜碱市场现状，发展前景及传统生产方法的基础上，重点论述了萃取结晶法生产甜菜碱的原理、特点、萃取剂的选择等，证明萃取结晶法提纯甜菜碱是可行的。

Resulting the extraction technology of artificial culturing biofilms, the hydroxylamine hydrochloride (NH_2OHHCl) was selected to extract manganese oxides, and sodium dithionite (Na_2S_2O_4) was used to separate manganese oxides and iron oxides.

用选定的最佳条件对不同时间和地点采集的生物膜进行萃取，发现对目的组分的萃取率可达70.8%~94.6%，而对非目的组分的影响很小(3.3%~11.0%)，满足萃取分离的要求。

Results: The extracts of ethanol, petroleum ether and ethyl acetate of Rhizoma Amorphophalli have inhibitory effect on the proliferation of cell SGC-7901, and the extract of petroleum ether has much more evident effect, showed a dose-effect curve.

结果：蛇六谷醇提取物、石油醚萃取物和乙酸乙酯萃取物均具有一定的抑制人胃癌SGC-7901细胞增殖的作用，以石油醚萃取物的抑制作用最为明显，呈现较好的剂量－效应曲线。

In the air samples ,di(2-ethylhexy) phthalate,di-n-butyl phthalate and dioctyl phthalate were included,while diethyl phthalate,di(2-ethylhexy) phthalate,dipropyl phthalate,butyl benzyl phthalate,dioctyl phtha...

大气环境样品中邻苯二甲酸酯类化合物的预处理主要采用的是索氏提取、溶液提取和填充柱分离；水环境样品中采用的前处理技术较多，但大多数都是萃取技术；底质和生物试样目前用的较多是微波萃取、超声波萃取和索氏提取。

ABSTRACT A binary solvent system for lincomycin extraction was investigated.

为了寻找适合萃取林可霉素的二元萃取剂，对林可霉素在不同溶剂中的分配系数以及二元萃取剂的性能进行了研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。