查询词典 molecular

Low molecular weight mannuronic acid, guluronic acid and κ-carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸，古罗糖醛酸和低聚κ-卡拉胶，并采用HPGPC法测定了这3种低聚糖的重均分子量。

Low molecular weight mannuronic acid, guluronic acid and κ carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸、古罗糖醛酸和低聚κ-卡拉胶，并采用 HPGPC法测定了这 3种低聚糖的重均分子量。在此基础上再经硫酸酯化和成盐修饰制备了各自的硫酸酯碱式铝盐。

The effects of temperature,shearing rate,angular frequency,molecular weight and molecular weight distribution on the rheological behavior were discussed.The resultsshowed that the molecular weight and its distribution of the polymer inferred from ...

研究表明，从稳态和动态测得的流变曲线求得的4种PP切片的分子量及其分布指数是同落球粘度法与熔融指数法相结合求得的分子量分布指数相吻合的。

To investigate the influence of surfactant molecular structure on micellization in solution, we used molecular dynamics to simulate the molecular structure and interaction of three alkyl aryl sulfonates in vacuum and in solution.

为研究不同结构的表面活性剂分子在溶液中胶束化能力的差异，采用分子动力学方法模拟三种烷基芳基磺酸盐在真空和水溶液环境下的结构与相互作用。

The analysis method of component evenly proved the aboveresults. So exploring the software of the Hyperchem to design the molecular struture for humic and fulvicacid have reliability. As the result, the Felbeck\'s model of the humic modle and Buffle\'s model of the fulvicacids had more reasonable molecular structure than other molecular structure models.

疏水性与折射性、极性、近似表面积、栅格表面、体积、质量在HA和FA与金属离子结合物模型上表现出的不同，应用主成分分析的结果正好验证了上述现象，说明此软件对于腐殖质结构设计具有一定的可信度。

Besides, viewing from the organic matters of different molecular weight, chloramine disinfection controlled the THMs and HAAs formation of the organisims whose molecular were less than 10KDa, and the control effect was weakened at some certain extent with the increase of molecular weight.

当有机物按不同分子量来分级时，氯胺消毒能使分子量＜10KDa的有机物生成THMs和HAAs的量明显减少；随着有机物分子量的升高，氯胺消毒的控制效果有一定程度的减弱。

When Ri increases, the effort in the molecular will increase, and molecular in the emulsion will crimple in group, the distribution of molecular weight in emulsion will widen and distribution degree increase.

利用预聚体封端接枝技术合成了具有优异贮存稳定性和耐水性的丙烯酸酯改性聚氨酯水分散体与丙烯酸酯-有机硅氧烷复合改性聚氨酯水分散体。

Based on the characteristics of molecular structure, the adjacent matrix and dyeing matrix were used to characterize the molecular structure of alkane and cycloalkane, a new method——the group contribu-tion method, was developed to calculate the boiling points of alkane and cycloalkanes from molecular struc-ture.

根据分子结构的特点，通过用邻接矩阵和染色矩阵表征分子结构，发展一种根据分子结构信息计算烷烃和环烷烃沸点的新方法——基团贡献法。

They are also aiming at the areas, including molecular control of neural differentiation from uncommitted ectoderm, molecular basis for diversity of neurons, molecular basis for fine positional information during early embryogenesis and in vitro differentiation of ES cells into neural tissues etc.

他们还致力于未成熟外胚层神经分化的分子控制；神经元多样性的分子基础；早期胚胎发育阶段，细微的位置信息的分子基础；进入神经组织的ES细胞的微分化等领域的研究。

In this thesis, molecular electronegative distance vector and 3D holographic vector of atomic interaction field (3D-HoVAIF) are applied and extended, the former is based on the 2D information of molecular structure, the latter is based on the 3D information of molecular structure.

本文在实验室已有的良好基础上，应用和发展了基于分子二维结构信息的系列分子电性距离矢量和基于分子三维结构信息的三维原子场全息作用矢量(3D-HoVAIF)。

Basic types and components of ribosome; the structure of ribosome; the functions of ribosome protein and rRNA.

核糖体的基本类型与成分；核糖体的结构；核糖体蛋白质与rRNA的功能

The prevalence rate of hookworm continued to decrease to 0 5% after treatment on selected population.(3) The prevalence rate and the intensity of hookworm has been less than 1% and 10/LPG for 8 years. No hookworm larvae had been isolated from the soil.

采取重点人群治疗，钩虫感染率降至 0 5 %。1993～ 2 0 0 0年不采取任何主动干预措施，钩虫感染率降至 1%以下，感染度降至 10 /LPG以下，且持续 8年无回升，土壤中分离不到钩蚴。