查询词典 chemical method

The rheological property of a bisphenol A cyanate resin was investigated by means of parallel plate method, it was modified by isothermal precure process. The effects of precure process on the chemical structure of resin were studied by IR, DSC and GPC methods.

本文采用平板法研究了一种双酚A型氰酸酯树脂的流变特性，通过恒温预固化的方法对其进行改性，并借助红外光谱、差示扫描量热法和凝胶渗透色谱法等手段分析了预固化对氰酸酯树脂化学结构的影响。

The method for preparing the ginkgo pyroligneous liquor of the invention is simple, the obtained product is a green product of all-natural formulation and has no residue and pollution as a natural agricultural chemical substitute.

本发明所述银杏木醋液制取方法简单，所得产品是纯天然制剂的绿色产品，作为一种天然的农用化学品替代物无残留，无污染。

The sheet-like α-Co2 composed of the uniform nanoparticles was successfully prepared using cobalt chloride as the raw material and polyvinyl pyrrolidone as the dispersant by chemical precipitation method.

以氯化钴为原料，聚乙烯吡咯烷酮为分散剂，采用化学沉淀的方法制备出由纳米粒子组成的片状α-Co2。

Due to the key challenge for complicated techniques and preparation, there were few reports about ternary systems. A series of polyimide/SiO_2-TiO_2 hybrid films with different contents of inorganic particle were fabricated using tetraethoxyl silicane and tetrabutyl titanate as precursor in situ with sol-gel method and both phases in situ. Chemical structure and micro-morphology of hybrid films were studied by means of IR, SEM and XRD.

本文以正硅酸乙酯和钛酸四丁酯为前驱体，采用原位溶胶-凝胶法和两相原位同步法制备了一系列不同含量的聚酰亚胺/SiO_2-TiO_2杂化薄膜，利用红外光谱、扫描电镜和XRD观察了薄膜的化学结构和微观结构，并测试了薄膜的热稳定性、电击穿场强和耐电晕性。

A series of polyimide/SiO2-TiO2 hybrid films with different contents and weight ratio of inorganic particle were fabricated using tetraethoxyl silicane and tetrabutyl titanate as precursor by situ method. Chemical structure, micro-morphology and thermal stability of hybrid films was studied by means of SEM, IR and XRD, TGA was also tested.

以正硅酸乙酯和钛酸四丁酯为前驱体，采用两相原位同步法制备一系列不同含量及重量比的聚酰亚胺／SiO2-TiO2杂化薄膜，利用红外光谱、扫描电镜和XRD观察了薄膜的化学结构和微观结构，并测试了薄膜的热稳定性。

However, a robust in silico method that could fulfill these objectives across a wide variety of chemical space has yet to be developed.

然而，能够满足这些跨越多种化学空间的实体的坚实的计算机方法尚未被开发。

A method combining chemical and biological experiments and computer-aided molecular design was used to optimize lead compounds with inhibiting activity against Sphaerotheca fuliginea.

本文介绍了用结合化学、生物实验以及计算机辅助分子设计方法优化对瓜类白粉病毒有抑制作用的先导化合物的研究。

The corrosion rates of iron in 0.5～2N sulfamic acid of 25～70℃ are investigated by the conventional gravimetric method and by chemical analysis, Based on the experimental data,the several kinetic parameters of iron in sulfamic acid have been calculated,such as rate constant,activation energy,frequency factorand another constant,with the empericat equation put forward by Mathur.

本工作用腐蚀失重和化学分析方法研究了铁在0.5～2N 氨基磺酸溶液中，在25～70℃条件下的腐蚀速率。根据这些腐蚀速率数据，利用 Mathur 提出的经验公式计算出铁在氨基磺酸溶液中腐蚀反应的动力学参数 K、B、E和 A。

Methods Immunocyto- chemical staining method and flow cytometry were used to detect the expression of putative tumor-initiated cell marker CD133 in nasopha- ryngeal carcinoma cell line SUNE, and the isolation technique with immunomagnetic beads was applied to purify CD133 + cells.

目的 检测CD133在人鼻咽癌细胞株SUNE中的表达以及CD133+肿瘤细胞的体外增殖、分化情况，并对其进行类肿瘤干细胞的鉴定。

Objective: To study the chemical constituents of Swertia mileensis. Method: The air-dried whole plants of S. mileensis were extracted with 50% EtOH.

中文摘要：目的：对龙胆科獐牙菜属植物青叶胆Swertia mileensis的干燥全草进行化学成分研究。

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％。