萃取

He extraction equilibrium is an exothermic reaction and the extraction enthapy of americium is -80.54、-81.99 and-75.88 kJ/mol for TBOPDA,T i BOPDA and TBDOODA,respectively.

BOPDA、TiBOPDA和TBDOODA萃取镅的反应焓变分别为：- 80 5 4、- 81 99和- 75 88kJ/mol；求出了萃取反应自由能和熵值的变化；观测了不同平衡酸度下萃入有机相中金属离子的可见吸收光谱。

Based on analyzing the generation mechanism and quality characteristics of reclaimed acid from benzol refining and comparing varies kinds of purification methods, the operation easily, the technical process simple extraction method is used to purify the reclaimed acid and the dosage of the extraction agent and extraction power are studied in detail.

对精苯再生酸的生成机理、质量特性进行了分析，通过比较各种再生酸净化方法的优缺点，选用操作简便、工艺简单的再生酸净化方法——萃取法对再生酸进行处理试验，并对萃取剂的用量、萃取能力等进行了详细的研究。

Continuous multistage counterflow centrifugal dephenol extraction and reextraction regeneration of the extractor were studied and proper operating parameters determined.

在此基础上，进行了多级连续逆流离心萃取脱酚及萃取剂反萃再生的研究，确定了适宜的工艺操作参数。

The waste acid was recovered from the raffinate with the active carbon as the decolorant at room temperature .

以正辛醇为萃取剂，通过三级萃取处理硝基C酸废水，萃余水相经过活性炭室温下脱色回收废酸。

The experimental results show that, adding entrainer to raw material in static mode combined with adding a suitable concentration of entrainer to SC-CO〓 in flowing mode may be the best way among the three kinds of methods for adding entrainers.

首先研究葡萄籽油的提取工艺，重点考察了萃取温度和萃取压力对葡萄籽油产率的影响，确定了适宜工艺条件并比较了三种不同来源葡萄籽的萃油效果。

Grapeseed to dissolve grime, provides moisture and balance. Sweet Almond to moisturise. Cucumber to soothe and cool.

葡萄籽萃取能够溶解污垢，使皮肤保湿平衡；甜杏仁萃籽滋润皮肤；黄瓜萃取使皮肤柔软，感觉清凉。

By comparison recoveries of several sequential extraction procedures and selectivity of extractants for thorium in soil and scoria, Martínez-Aguirre's sequential extraction method was adopted for quantitative analysis of thorium fractions, then the optimization and evaluation of the sequential extraction method were performed.

分别采用Tessier、BCR和Martínez-Aguirre形态萃取方法对土壤和样品中钍的形态进行分析，通过对总量的回收率和萃取剂选择性比较，选择了Martínez-Aguirre连续萃取法定量样品中钍的形态，并对其进行了优化和评价。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根据传爆药中各组分的物理、化学性质及主体炸药的粒度大小，进行综合分析，确定了采用碱回流重量法测定JOB-1C 中F_(2641)的含量，测定条件：加入100ml浓度为8.0±0.1％的氢氧化钠，在恒温水浴中煮沸回流6h；采用溶剂萃取法测定JOB-1C中TATB的含量，选择TATB饱和的二甲基甲酰胺为萃取溶剂，用G4坩埚式过虑器进行萃取分离；采用多波长线性回归紫外分光光度法测定JOB-1C中PNP的含量，通过实验确定了多波长组合：λ=267nm，275nm，283nm，291nm，299nm；朗波—比耳定律的适用范围为PNP浓度：0.005～0.025mg/ml，HMX浓度：0.06～0.30mg/ml；在测定波长下，对PNP、HMX标准溶液的吸光度—浓度进行线性回归，由回归曲线的斜率得出PNP、HMX的吸收系数；根据朗波—比耳定律和吸光度加和性原理，在测定波长下，对PNP、HMX 两组分混合溶液A_i/E_HMX(i与E_PNP(i/E_HMX(i进行线性回归，回归曲线的斜率即为混合溶液中PNP的浓度。

A series of disubstituted monoamide s extractants were synthesized and their extracted species with uranyl nitrate were obtained by extraction method.

合成了系列双取代单酰胺萃取剂，利用萃取方法获得了与硝酸铀酰的萃合物。

The results from analysis of conjugated dienes and thiobarbituric acid-reactive substance formation showed that aqueous extracts of black rice and black sesamin and ethanol extracts of black Jew's ear inhibited the oxidation of LDL.

我们发现，黑糯米和黑芝麻水萃取物及黑木耳的酒精萃取物会延迟脂质氧化过程的中间产物 conjugated dienes 的出现，且会抑制终产物 thiobarbituric acid-reactive substance 的产生，反映出黑糯米和黑芝麻水萃取物及黑木耳的酒精萃取物具有抗低密度脂蛋白氧化的能力。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失