查询词典 isomer

The effects of factors such as complex coupling, interconvert isomer, suffocate spin and chiral carbon on the appearance of the spectra were studied and discussed in the paper.

采用600MHzNMR谱仪较详细地研究了不同类型有机磷农药的NMR谱图，分析了复杂偶合、直变异构、受阻旋转、手性碳原子等因素对有机磷农药的NMR谱图影响。

The title compound used as an amino acetylating reagent was further reacted to yield Cefepime hydrochloric acid, the crystals obtained has white pale color and is stable to temperature, and has no E-isomer too.

用其作为氨基酰基化试剂进一步合成盐酸头孢吡肟，也得到基本上白色的对温度稳定的不含E-异构体的晶态化合物。

After the lanthanon atom Ce is encaged, the volume of each isomer cage expands slightly, which leads the cluster more stable.

在掺入稀土金属原子Ce之后碳笼的体积有略微的膨胀，且该原子的掺入能够得到更稳定的团簇。

However, fac-Alq3 has been obtained only in the subgram order by sublimation of mixed polymorphs of Alq3 or by thermal conversion of commercial Alq3 followed by acetone and chloroform treatment because synthetic control of a ligand configuration has been considered difficult as a result of the favorable formation of the thermodynamically stable mer isomer.

然而，因子Alq3得到了只有在subgram秩序的升华混合晶型的Alq3或热转换商业Alq3其次是丙酮，氯仿的待遇，因为合成控制配配置一直被认为困难是由于有利的形成的热力学稳定滨海异构体。

One compound is identified as the title compound 2-benzyloxy-5-fluoro-4-oxo-pyrimidine-3-butyric acid ethyl ester, and the other one is its formula isomer.

通过IR谱确证一个化合物是目标物2-苄氧基－5-氟－4-嘧啶酮－3-丁酸乙酯，另一化合物是它的同分异构体。

Mossbauer isomer shifts of Fe2+ ion in LaFeAl11O19 and Eu3+ ion in LaMgAl11O19 are calculated by using the chemical surrounding facter,h,definited by covalency and electronic polarizability,and the results are in agreement with the experimental values.

利用由共价性和极化率定义的化学环境因子h计算了LaFeAl11O19中57Fe的穆斯堡尔同质异能位移和LaMgAl11O19∶Eu中151Eu的同质异能位移，所得结果与实验值一致。

For two homoatomic Sb42- and Bi42- species, there are three stable isomers: square (D4h), roof-shaped (C2v-1), and C2v-2 structure with the square isomer being the ground state.

计算结果表明Sb42-和Bi42-团簇有三种稳定的结构：正方形(D4h)、屋顶型(roof，C2v-1)和C2v-2结构，其中正方形结构是基态。

For the heteroatomic dian- ionic22- species, there are also three stable isomers: rhombus (D2h), roof-shaped (C1), and C2v structures with the rhombic isomer being the ground state.

由异原子组成的22-团簇也有三种稳定结构：菱形(D4h)、屋顶型(roof，C1)和C2v结构，其中菱形结构是基态。

It undertakes fuel oil, polymer, paraffin wax and chemical fibre, with the main products of non-lead gasoline, light diesel fuel, 20# heavy diesel fuel, topped oil, naphtha, aviation kerosene, cracked diesel oil, fuel oil, base oil, isomer dewaxing oil, liquid petroleum gas, propane, propylene, MTBE, benzene, toluene, xylene, paraffin wax, polyacrylamide, acrylonitrile, ammonia sulfate, semi-refined asphalt, acrylon, furfural extract oil, liquid nitrogen, etc, totaling 338 varieties and more than 100 kinds of brands.

它的主要产品有：高标准清洁汽油、无铅汽油、轻柴油、重柴油、航空煤油、化工轻油(拔头油、裂化原料油、石脑油)、燃料油、&老三套&基础油、异构脱蜡基础油、液化石油气、丙烷、丙稀、MTBE、石蜡、聚丙稀酰胺、丙稀腈、硫胺、硫磺、三苯、半炼沥青、腈纶、糠醛抽出油、液氮等38种100多个牌号的石油化工产品，产品辐射全国25个省、市、自治区。2000年销售收入119.9亿元。

An isomer of amphetamine trade name Dexedrine used as a central nervous system stimulant .

一种不饱和碳氢化合物的橙色异构体，见于许多植物中，在肝脏中转化为维生素a。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。