取代物

Nowadays, anthropocentric economic development view is gradually replacing,materialcentric economic development view , while it keeps continuing to improve itself.

在现代，已经出现人本经济发展观逐步取代物本经济发展观的基本趋势，同时人本经济发展观自身也应不断完善。

The generalized relationship which correlates the geminal coupling constants with the hybrid orbitals, net atomic charges, bond lengths and bond angles had been employed to obtain one concrete relationship for calculation of the geminal coupling constants 2JCaCbH in aromatic systems.

在前文工作的基础上，本文结合MNDO分子轨道方法和最大键级杂化轨道方法研究得到了计算苯及其取代物中孪位偶合常数2JCCH的多元级性关系式。

The structure-toxicity relationship of 59 substituted benzenes was studied by the method of bayesian regularization neural network,and a QSAR model was built for environmental toxicity evaluation and prediction of substituted benzenes with lipid-water partition coefficient and four quantum indices.

利用贝叶斯规整化神经网络研究了59种苯取代的环境毒性和分子结构的关系。建立了基于脂水分配系数和4种量子指数的QSAR环境毒性预测模型。结果表明：该模型的预测性能超过偏最小二乘法和逐步线性回归方法，残差分析显示其稳定可靠，有望成为一种良好的苯取代物毒性的环境评价和预测的方法

It replaces the shotgun and enables the Pyro to burn his foes at long range, given that he can aim well enough.

它是散弹枪的取代物，假如Pyro的射击准度足够精确，他就可以用这把枪远程烧掉他的对手。

The bay area has no substituent and has electron-withdrawing groups,such as bromine atom,cyano-group and 4-formyl phenoxy group compounds have strong absorption in 525 nm,when excitated them,they have strong yellow and salmon pink luminescence bettwen 538 and 566 nm.When introduce electron-donating substituents,such as phenoxy group,morpholinyl,piperidinyl and n-butylamino group,the absorption bathochromic shift while the electron-donating ability is improved,bettwen 536 and 692 nm have strong absorption,reach to the near-infrared region. When excitated them,only the phenoxy group compound has strong salmon pink luminescence in 572 nm,the others have no fluorescence.

其中，港湾位无取代的以及含吸电基团(—Br、—CN、对甲酰基苯氧基)化合物在525 nm左右处均有很强的吸收ε＞10~4M~(-1cm~(-1)，当光激发时，港湾位无取代、溴代和氰基取代物发出538～547 nm的强烈黄色荧光，对甲酰基苯氧基取代物则发出566 nm的强烈橙红色荧光；含供电基团(苯氧基、吗啉基、哌啶基、正丁氨基)化合物随着供电子能力的增强，吸收发生红移，在536～692 nm处均有很强的吸收ε＞10~4M~(-1cm~(-1)，达到了近红外区，当光激发时，只有苯氧基取代物发出572 nm的强烈橙红色荧光，而含氮供电基取代物均发生了荧光淬灭。

The phosphate, vanadate and bismuthate contained glasses are promising candidates for the substituting of the lead glasses currently most used by the electronic pastes.

磷酸盐、钒酸盐、铋酸盐玻璃体系是目前含铅低熔玻璃的取代物。

The major products were methane, ethylene, propylene, butylene, butadiene, cyclopentadiene, benzene, toluene, styrene, vinyl-substituted cyclopentene derivatives and C5/C6 isomers (pentadiene, methyl-substituted cyclopentene derivatives, cyclohexene, hexadiene and methyl-substituted cyclopentadiene derivatives), and the main primary products were determined to be C1～C4 compounds, cyclopentadiene, benzene, toluene and vinyl-substituted cyclopentene derivatives.

热裂解主要产物为甲烷、乙烯、丙烯、丁烯、丁二烯、环戊二烯、苯、甲苯、苯乙烯、环戊烯的乙烯基取代物及C5， C6异构体(戊二烯、环戊烯的甲基取代物、环己烯、己二烯和环戊二烯甲基取代物)，其中， C1～C4、环戊二烯、苯、甲苯、乙烯基取代环戊烯为初始产物。

The major products were methane, ethylene, propylene, butylene, butadiene, cyclopentadiene, benzene, toluene, styrene, vinyl-substituted cyclopentene derivatives and C5/C6 isomers pentadiene, met...

热裂解主要产物为甲烷、乙烯、丙烯、丁烯、丁二烯、环戊二烯、苯、甲苯、苯乙烯、环戊烯的乙烯基取代物及C5，C6异构体(戊二烯、环戊烯的甲基取代物、环己烯、己二烯和环戊二烯甲基取代物)，其中，C1～C4、环戊二烯、苯、甲苯、乙烯基取代环戊烯为初始产物。

According to the calculated results, a new atomic charge distributions of 2,3-diphenyl-tetrazole-5-thione was proposed with the sulfur atom and tetrazole ring having negative charges and the two phenyl-rings havingpositive charges.

对合成的3种[1，3，4]-噻二唑-2-硫酮-3，5-二取代物，用元素分析、红外光谱和紫外光谱等方法进行了表征，同时得到了其中两种化合物的晶体结构。

Most negative charges are distributed on N(4) and N(1) with N(4) being the most. Above 3000cm-1 C-substituted tetrazoles have more and stronger absorption lines than the corresponding N-substituted isomers.

环负电荷主要分布在N(4)和N(1)原子上且N(4)较N(1)为多。C-取代物的IR光谱在3000cm-1以上有较强吸收而N-取代物则较小，且前者的强吸收线多于后者。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。