查询词典 molecule

With the reduction of SOM content and the elevation of contamination concentration, the difference between PHE and PYE decreases gradually, while B［a］PYE exhibits a significant difference from them. This could be attributed to the high lipophilicity and large molecular size of B［a］PYE, which make the molecule of B［a］PYE to be more easier to be held in the nanopores of clay and the dense region of SOM.

不同多环芳烃SPMD辅助解吸率差别很大，随着土壤有机质含量的降低，以及污染物浓度的提高，菲和芘的解吸差异逐渐缩小，而苯并［a］芘与上述2种多环芳烃的差异很大，主要是由于苯并［a］芘具有高度亲脂性，并且分子较大，造成其容易滞留在粘土的微孔及有机质的致密结构中。

After two steps of molecule distillation, the recovery percent of pure pyruvic acid was above 89.99% and its content achieved 99.01%.

通过二步分子蒸馏，成品丙酮酸的质量浓度为99.01%，回收率89.99%以上。

Currently activities involve (1) Investigation of dye-DNA interaction by using spectroscopic methods to probe the binding sites between chromophore and DNA and to identify various DNA conformational structures, particularly the telomeric DNA;(2) Investigation of the structure-activity correlation of anti-telomerase agents;(3) Design and synthesis new compounds for antitumor agents and fluorescence biomarkers;(4) Monitoring the folding and unfolding of quadruplex structure, tracing the pathway of drug delivery and probing drug-target interaction by using single molecule microscopy and spectroscopy.

目前 的研究重点分别是(1)利用光谱方法探讨探针分子与DNA的交互作用，特别是作用位置与结构变化；(2)研究抗端粒酵素作用分子之结构与生物活性之关系；(3)设计及合成抗肿瘤药剂或萤光生物标记；(4)建立单分子萤光光谱与影像技术，研究 DNA的多变型结构之变化机制，监测药物输送的路径过程及其在细胞中与标的物的作用。

Quantum chemistry method was used to calculate the geometry structure of heavy oil character molecule .

采用量子化学方法计算得到重油特征分子的几何结构，提出了用量子化学方法计算重油特征分子的最小横截面直径和描述分子尺寸的方法。

Professor Chu's research in atomic physics, quantum electronics, polymer and biophysics includes tests of fundamental theories in physics, the development of methods to laser cool and trap atoms, atom interferometry, and the manipulation and study of polymers and biological systems at the single molecule level.

朱教授的研究原子物理学，量子电子学，聚合物和生物物理学，包括试验的基本理论，在物理，发展方法，以激光冷却和捕获原子，原子干涉和操纵和研究聚合物和生物系统的单分子水平。

First, we construct two typical molecule four quark states with quantum number $1^{-+}$.

我们首先构造了两个典型的$1^{-+}$分子四夸克态，利用考虑瞬子效应修正后的QCD求和规则研究它们的质量问题。

The N(1) atom of the quinazoline can form a stable H- bond with Met-769, while the N(3) atom can form a H-bond with a water molecule.

抑制剂喹唑啉环上的N(1)原子能够和Met-769上的 NH形成稳定的氢键，而抑制剂上的N(3)原子则和周围的一个水分子形成氢键。

The X-ray crystal structure of the complex of quinazoline inhibitor to EGFR-TK revealed that the N3 of the inhibitor form a hydrogen bond with Thr830 of EGFR-TK through a water molecule.

因此，分子构型的差别是导致化合物SU5402和A1对EGFR-TK活性差异的主要原因。

It showed that carboxylic saline in the molecule of zinc norfloxacine produced negative electric charge average distribution because of carboxylic saline forming carboxylic radicel.

说明氟哌酸锌中羧酸的盐类因形成羧酸根负离子，使负电荷平均化。

Environment radon is mainly from rock and soil in geological environment, but the research is not connected with geological environment now. On the basis of physical field, the theoretical distribution model of radon in soil and exchange model of earth—air are set up by using Fick diffusion law and Dacy law, and then the research of environment radon is linked with geological environment. This paper described how the evry parameter of the theoretical model influence the radon concentration in air. The results of research indicat that molecule diffusion of radon is different from it's eddy form. Under the condition of surface radon source, the model experiment is used to study the transportation and distribution of radon in medium. The data of experiment show the relationship between radon and depth can be described by exponent. If the radioelement is well—distributtion, the concentration of radon in different depth or in different point at the same depth change with time, but the accumulated exhalation amount of radon at different point on the surface of model are close in relative long time. The author studied the exchange of radon between mediums and verified the theoretical models too.

环境氡主要来自岩石、土壤，而目前环境氡研究中与地质环境结合很少，为此作者以物理场为基础，运用气体运移的费克扩散定律和达西定律，建立起壤中氡浓度分布与大地—大气间氡交换理论模型，首次在理论上将环境氡与地质环境结合起来；论文中从理论上讨论了模型中各参数对空气中氡浓度的影响，发现空气中氡运移的分子扩散方式和湍流扩散方式存在明显差异；通过面状氡源条件下的氡运移模型实验，研究了介质中氡的运移与分布，实验数据表明氡浓度随深度的变化规律可用指数函数描述，在放射性元素分布均匀的条件下，介质中不同深度和同一深度不同点的氡浓度随时间而变，但介质表面不同点在较长时间内向空气中累计释放的氡的量是相近的；同时研究了不同介质间氡的交换，并验证了所建立的理论模型；运用理论模型预测青岛市城区壤中氡浓度、江西临川一住宅区空气中氡浓度及江西二个测区的区域空气中氡浓度分布，取得了较好的效果。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。