分子

The process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process).

把石油重分子分解成低分子碳氢化合物的过程；把石油分子分解成更小的分子并提取低沸点的分馏部分的过程。

Whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process).

把石油重分子分解成低分子碳氢化合物的''。'过程'。''；把石油分子分解成更小的分子并提取低沸点的分馏部分的''。'过程'。''。

The discovery of [60]fullerene made us to learn of a completely new world ofcarbon: from plane molecule of low symmetry to ball shape molecule of highsymmetry, from simple molecule to supermolecule of fullerene clathrate and fromone-dimensional superconductivity to three-dimensional superconductivity.

的发现使我们了解到一个全新的碳的世界，从平面低对称分子到全对称的球形分子，从简单的分子到富勒烯笼内包原子的超分子，从一维超导到三维超导。

Polyatomic molecules Compared with diatomic and triatomic molecules and large clusters, the interaction of polyatomic molecules with intense femtosecond laser field need to be paid more attention.

多原子分子相对于简单的小分子和团簇分子而言，多原子分子与强激光的相互作用还缺少深入的研究。

And AEV agar gel precipitin antigen and an inactivated oil-emulsion vaccine against AE were produced. The purpose of this study, on the base of former research, was to reveal and better understand some molecular pathogenesis of AE, to set up a working model which could be generally used by anther researcher in the field of animal molecular pathology.

本项实验研究，旨在过去工作的基础上，利用分子生物学、分子免疫学的技术手段，探讨和揭示AE发生发展过程中的某些分子发病学机理的问题，并试图建立一种具有普遍指导意义的动物分子病理学研究的工作模型。

Under the influence of an external electric field defined by Sparkles, wecomparatively study the molecular structures and NLO responses of the push-pull thiophene quinoid molecules, push-pull furan quinoid molecules and push-pull pyrrole quinoid molecules. The results make known that the relative size ofthe molecular polarizability values for the three quinoid-type molecules dependson the selection of the donor-acceptor pairs.

比较研究了推-拉噻吩醌型分子、推-拉呋喃醌型分子以及推-拉吡咯醌型分子在点电荷外加电场作用下的分子结构和NLO响应，结果表明：这三种分子超极化率的相对大小取决于给体-受体对的选择。

For two possible geometric structures,square and regular tetrahedron,the electronic structures of ground state and structure parameters of the O_4,O-_4 and O+_4 are calculated according to the principle of minimum energy.

计算了2种可能的空间结构——正方形和正四面体，分别得到了这2种结构的中性分子O4，正一价分子O+4和负一价分子O-4的基态电子结构，并根据能量最低原则确定了各自的结构参数，从而得到了O4分子2种结构的基态总能量、一价电离能及电子亲合势能。

The relative permittivity of the Langmuir monolayer on a substrate surface is calculated by the orientation order S with consideration of the length of the permanent dipoles within domain and the distance between the dipole and the substrate.

计算结果表明：对于成份一定的稳定构型单分子层膜，其相对电容率大小除了依赖于分子密度和基底物质的相对电容率外，对分子负电荷中心离基底的距离，以及考虑电偶极子长度的分子区域大小也有不同程度的依赖

To an asymmetric synthesis of (1), we applied a type of Roush addition in the first step to introduce the C4 stereocenter, and then the chair substance -122 are readily transformed into the title compound -aphanorphine using the same route as to the racemic target molecular.

aphanorphine分子的不对称合成是在第一步通过对甲氧基苯乙醛（119）发生Roush反应引入手性，得到手性高烯丙醇-122，然后利用与合成外消旋目标分子相同的方法，光学纯化合物-122经一系列转化可得到光学纯中间体化合物139；化合物139发生分子内傅—克反应的过程中，由C4位手性立体特异地控制C1位手性的生成，从而解决-aphanorphine分子中的手性问题。

Meanwhile, the antibodies of VIP enhanced the activation of lymphocytes and the expression of CD68, SYP in sacculus rotundus.

采用抗SP抗体使SP作用受到抑制后，圆小囊组织中淋巴细胞活化分子、DNES细胞表达SYP和巨噬细胞表达CD68分子的量均出现一定程度的减少；而当VIP作用受到抑制后，圆小囊组织中淋巴细胞活化分子、DNES细胞表达SYP和巨噬细胞表达CD68分子的量均出现一定程度的增多。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。