分馏

The intense fractionation of REE and the obvious depletion of HREE suggest that these volcanic rocks were derived from garnet lherzolite of the mantle in the continental lithosphere.

稀土元素的强烈分馏以及重稀土元素显著贫化，意味著这些火山岩源自於大陆岩石圈地慢的石榴石二辉橄榄岩。

In the presence of acid catalyst, APG is formed by use C8 - C14 monohydric alcohols、low-carbon alcohol and glucose monohydrate with one step synthesis reaction, and it could be used without fractionation in most applications.

在酸性催化剂存在下，用C8～C14单羟基醇和低碳醇与一水合葡萄糖反应，一步合成较高纯度，在大多数应用场合不经分馏而直接使用的浅色烷基糖苷。

The main content of the disquisition is studying the Simulation of fractionation process and application in the whole process of the nitrotoluene producting, using the technology of process simulation.

本课题研究的主要内容是运用流程模拟技术进行硝基甲苯生产中硝基甲苯分馏过程的全流程模拟及应用。

Sulfur isotope of franeolite indicate that sulfur isotope value of phos phate concretion is larger than that of evaporite sulfate, there is little doubt that sulfur isotope fraetionation happens during phosphorite diagenesis, heav ier sulfur is laid in sediments because of formation of H〓S.

磷结核的稳定S同位素测试表明：其值大于同时代海水蒸发盐的值，这是由于在成岩作用过程中发生了S同位素分馏，生成H〓S，从而使沉积物中富集〓S。

Based on the postulated 2D average molecular unit structures proposed by Zhao et al, 3D conformations for the end-cuts of Athabasca bitumen pitch in Canada were created using polymethylene bridges with different lengths by the Computer Aided Molecular Design method.

利用分子模拟技术对加拿大Athabasca油砂沥青超临界萃取分馏残渣组分的化学分子结构进行了研究，首先选用长度不同的桥链构建了其三维平均结构，然后采用分子力学和分子动力学方法得到能量最低也即最稳定的构象。

It is determined that the contents and distribution of pyrrolic compounds and dibenzothiophene are controlled by oil fraction during migration, which has potential significance in evaluating the oil migration and reservoir Filling direction.

杂环芳烃中的吡咯类化合物和二苯并噻吩具有显著的油气运移分馏效应，可以作为有效的油气运移与油藏充注方向的分子级示踪参数。

By comparison among concentration of nitrogen compounds, relative contents of pryyolic N-H shielded carbazoles and parameters of C21-/C22+、Pr/nC17 , the results show that slight biodegradation has little effects on the relative contents and distribution of pyrrolic nitrogen compounds, but has certain effect on its concentration.

根据2类原油中含氮化合物浓度、屏蔽型含氮化合物的相对含量与反晕原油生物降解的地化参数C21-/C22+、Pr/nC17等指标的对比研究，发现生物降解作用对该区原油中含氮化合物的相对含量及其分布影响不显，运移作用仍然是造成含氮化合物分馏的主要因素。

And 5. 4～8. 5‰, respectively. Nonequilibrium oxygen isotope fractionation between rock-forming minerals and the low H〓O content indicate that depletion in D-〓O of the A-type granites from eastern China is the result of magma degassing and subsolid interaction between meteoric water and rocks.

主要造岩矿物对氧同位素不平衡分馏和全岩低水含量特征指示中国东部A型花岗岩D-〓O亏损主要受岩浆去气作用和岩浆期后大气降水亚固态交换的制约。

Results According to the information at home and abroad and the research and the study result of toxicologic experiments,hygienic standard was drawn.

石油沥青是石油原油分馏后剩余的副产品，随着石油产量的增加，沥青的产量也随之增加。

So the units were revamped by using a new kind of float valve tower and trapeziform valves developed by Tianjin University, which achieved better economic benefits.

采用天津大学开发的一种新型浮阀和梯形浮阀对分馏塔进行了技术改造，收到了很好的效果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。