化合物

The paramagnetism of 4-1 and 4-2 is unprecedented in thechemistry of transition-metal-containing aromatic compounds.

化合物4-1和4-2具有顺磁性，这在其他金属杂芳香化合物的研究中未见报道。

Methods: In this paper, a quinazoline purine analogues for the parent nucleus, respectively, and four of its seven introduced to replace the structure of diverse and flexible side-chain amino-benzene, design a series of 4 - to replace the aniline-based -6 - methoxy --7 -(2 - hydroxy replace C oxy) quinazoline compounds.

目的：通过各种化学合成方法完成目标化合物4--6-甲氧基-7-(2-羟基取代丙氧基)喹唑啉的合成并对目标化合物进行结构修饰，以期获得高活性的表皮生长因子受体酪氨酸激酶抑制剂。

Other compounds include the nitrides, exceptionally hard materials made from nitrogen and a metal; cyanides; azides, used in detonators and percussion cap s; and thousands of organic compounds containing nitrogen in functional groups or in a linear or ring structure.

其它的化合物包括氮化物，是由氮和金属生成的异常坚硬的材料；氰化物；叠氮化物，用作引爆剂和雷管；还有数千种含氮的有机化合物，以功能团或者线性或环状结构的形式存在。

Research on self - organization of complex system on element periodic table ;2. The formula can be used in calculating thirty quantitives or more of element and its compounds in the same tribe of the element periodic table .

将同系因子1／N用于元素周期表，以N为周期序数，P作为各元素或其化合物的性能，利用公式P＝a＋b／N对周期表中各元素及化合物30多种性能进行拟合，得到了良好的结果。

In order to find active pesticide leading compounds, thinking about that triazolothiadiazoles had various biological activities, this paper designed and synthesized 11 novel title compounds from 3-substituted-4-amino-5-mercapto-1,2,4-triazoles with heterocyclic carboxylic acid via cyclization in the presence of phosphoryl chloride by the princple of combination of active strucural moieties. The structures of the title compounds were characterized by melting point, IR, 1HNMR and elemental analysis.

为了寻找高活性农药先导化合物，考虑到三唑并噻二唑衍生物具有广泛的生物活性，本文利用活性亚结构拼接原理，将活性基团分别引入1，2，4-均三唑并[3，4-b]-1，3，4-噻二唑杂环的3位和6位，合成了未见文献报道的3，6-二取代均三唑并[3，4-b]-1，3，4-噻二唑类化合物11个，并用IR、1HNMR及元素分析测试技术对其进行了结构表征。

Anthraquinones are an important industrial material, and it is reported that some anthraquinones have photosensitization activity. Thus there compounds, discharged into aqueous system, may take place photochemistry reaction after absorb visible light, and lead to have a great risk for aqueous ecology systems.

蒽醌类化合物是重要的化工原料，而且研究表明部分蒽醌类化合物具有光敏活性，因此，排放到水环境中的此类物质吸收可见光后可能发生光化学反应，对水生生态系统造成严重的威胁。

Methods The chemical constituents were isolated and purified by silica gel column chromatography and identified on the basis of their physiochemical and spectral data.

方法利用硅胶色谱分离纯化马银花根的化学成分，根据化合物的理化性质和光谱数据鉴定化合物的结构。

The response to single compound: To both females and males, the compounds that elicit larger responses of adults are benzaldehyde, benzene acetaldehyde, hexanol,β-phenyl ethyl alcohol, benzyl alcohol, cyclohexanol and eugenol. Phytol, 2-methyl-cyclohexanone and β-caryophyllene reveal to have weaker activity.

对单一化合物的反应：两种昆虫，不论是雌蛾还是雄蛾，能引起较强EAG反应的化合物均为苯甲醛、苯乙醛、正己醇、β-苯乙醇、苯甲醇、环己醇和丁香酚，植醇、2-甲基环己烷和β-石竹烯仅能引起微弱的EAG反应。

As the secondary generation host, CD have received considerable attention because of its particular characterization, and the studies on host-guest interaction based on CD had been transferred from the processes and mechanism of inclusion complex between a pair of host and guest to construction of functional supramolecular aggregates, then these will be useful in the design and preparation of molecular machine and molecular devices, such as molecular pinchers, molecular gears, molecular motors and molecular balances, etc.

它的发展也先后经历了冠醚、环糊精、杯芳烃三代主要的主体化合物，环糊精作为超分子化学的第二代主体化合物以其独特的性质而倍受关注，基于环糊精的主-客体相互作用也在研究单一主体与客体包结形成过程及形成机理的基础上，进而追求具有特定功能的超分子聚集体，为设计制备分子钳、分子齿轮、分子马达、分子秤等重要分子器件和分子机器奠定基础。

We have exchanged the methyl group of the piperazine ring at 3-position of rifapicin to other new groups.

我们主要是将连接在利福平3位上的哌嗪环末端氮上的甲基换成其它基团，这些新连接的基团都与一些最近报道的抗菌活性比较强的新化合物的结构中所包含的基团相似或相同，并测试了这些化合物抗结核杆菌的活性，结果显示了他们大部分都保持了与利福平相当的抗菌活性，其中衍生物81的抗菌活性是利福平的十倍，具有进一步开发的价值。

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。