查询词典 structure group

Fluouricil is usually used as anticancer drug, its derivative, 5-fluoro-uracil-1- acetic acid has good biological activity. Its complexes were presented in literatures. However, the coordination modes of it are paradox in literatures. The single crystal structure was resolved to clarify the confusion. The result indicates the carboxylic group coordinates to zinc ion in unidentate, and the heteroatoms of pyrimidine ring are not involved in coordination. Antitumor activity against SMMC-7721 was also examined.

7.5-氟尿嘧啶是临床上广泛使用的抗癌药物，它的衍生物5-氟尿嘧啶-1-乙酸亦具有良好的生物活性，有关它的金属配合物亦有报道，但其结构指认相当混乱，为此研究了它与锌的配合物单晶结构，证明了5-氟尿嘧啶以单齿羧基与锌配位，而嘧啶环氮并未配位，也研究了它对SMMC-7721细胞株的抗肿瘤作用。

The electronic structure and spectroscopic properties of some dicyano group verbenone deriatives were investigated by means of quantum chemistry semiempirical AM1 and INDO methods.

利用量子化学半经验AM1及INDO/ SCI方法研究了双氰基马鞭草烯酮衍生物的电子结构和光谱性质。

The role of vinylene group in geometry,electronic structure and spectra property is analyzed according to the comparative study of the dyes.

通过对两种染料敏化剂的比较，分析了亚乙烯基对几何结构、电子结构和光谱特性影响。

Better numerical prediction of the distributions of shear forces and bend moment within the pile group has also been obtained with the consideration of many stochastic parameters such as the soil properties of sea warf, seismic properties, etc. And then we analyze the dynamic nonlinear seismic pile-soil interaction in sea warf as an example to apply the software of ANSYS to the assessment of the dynamic interaction of soil-structure in the harsh situation of random earthquake. And then we denoted that the soil-pile interaction is too difficult to be expressed in equations because the non-linear interaction between soil and pile.

5桩基由于其本身的优点得以在海洋码头结构中大量的运用，但是海洋码头结构在海洋环境下受多方面的影响，土与桩体的相互作用关系很难清楚的表达，由于影响因素的多样性及复杂性，以及它们与桩基性状之间的非线性和非确定关系，使得关于桩基性状的各种理论解答还不能采用简便的表达式以反映其复杂多变的机理，尤其是难于反映施工及环境因素对桩基性状的影响，而且如何发挥桩基的技术经济效益和如何合理的确定桩的极限承载力，也是一个技术难度很大的问题。

The structure of 36a was determined by X-ray crystallograph, which demonstrated the C5 and C7 hydroxyl group in syn-relationship.

我们在文献中发现，该天然产物的相对构型的确定方法有不够严谨之处。

However, various methods are used to suppress surface waves from shooting to receiving in the process of seismic survey, thus research should be carried out in the following aspects:① joint inversion with surface wave, refraction first break and microlog data;② offset range and the relation between group interval and surface resolution suitable for use in surface wave analysis;③ the influences of lateral relief of array on propagation of surface waves;④ method for Hi-Fi purification of surface wave signals;⑤ method for extracting dispersive curve through time-frequency analysis;⑥ forward modeling and in-version methods of surface wave in view of three-layer structure.

但石油勘探从激发到接收，都采取各种方式来压制面波，因而需要开展多方面的研究：①结合面波、折射初至波和微测井信息的联合反演；②地震记录中适合面波分析的炮检距范围、道间距与表层分辨率的关系；③排列横向地形起伏变化对面波传播规律的影响；④高保真提纯面波信号的方法；⑤运用时频分析提取频散曲线的方法；⑥针对三层结构的面波正反演方法。

The fund management model of an enterprise group is determined by its organization structure and financial management system.

企业集团的资金管理模式是由集团的组织模式和财务管理体制决定的。

At the same time, we found that the islets had appeared pathological degeneration, while the pancreatic lobular structure, acini and ducts had no visible changes in 20 Gy group.

且在20 Gy剂量组中胰岛细胞已出现部分退化、变性。

Necrosis is the pathologic death of a cell or group of cells in alive body with collapse of cytoplasm, autolyzed structure and acute inflammation.

活体内范围不等的局部细胞死亡，死亡细胞的质膜崩解、结构自溶并可引发急性炎症。

There was significant difference of △E between group A and C on the 28th day (P.05). CONCLUSION: Tooth colour would relapse after beaching in natural saliva, artificial saliva and deionized water, which may be related to the alternation of the tooth structure.

在体外条件下，牙漂白后颜色可发生回复，1周达到稳定；颜色回复可能与漂白后牙体组织矿物质结构的改变有关。

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％。