查询词典 chemical method

A series of tri-radicals with heterospin center of 1,3,5- trisubstituted benzee as feeomagnetic coupling unit has been studied by using quantum chemical DFT UB3LYP method.

采用量子化学DFT UB3LYP方法，在6-31G基组水平上讨论了以1，3，5-苯为铁磁耦合单元的异自旋中心三自由基体系。

MAP is a kind of fertilizers which can be sold for reducing the expense of chemical precipitation method running. Though large numbers of experiments some kinetic parameters, including the value of pH, the relationship between the rate of ammonia-nitrogen removal and the ratio of reagents selected in reaction, reaction time and speed of whisking and so on were obtained.

在大量实验的基础上，通过对反应的几个动力学参数的详细研究，总结出了pH 值、反应药剂配比等与氨氮去除率的关系，并通过正交试验设计与单因素分析得出该方法在处理高浓度氨氮废水中最佳的工艺条件。

This dissertation consists of six chapters focusing on the study of extraction method, physical and chemical characters and biolog...

本论文共分为七章，系统地研究了中草药连翘有效成分连翘酯甙的分离提取方法、提取工艺、理化性质以及生物活性。

The cDNA squence of antibiotic, an antibacterial peptide, a process for preparing the said cDNA and a process for recombining the antibacterial peptide are disclosed. The present frequency of amino acid codens in Attacin A cDNA is analyzed. The high-frequency coden is introdued to its protein sequence to configure its cDNA sequence. The target gene is synthesized by chemical synthesis method or polymerase chain reaction.

本发明公开了葛佬素的cDNA序列，葛佬素cDNA的制备方法以及重组抗菌肽葛佬素的制备方法；通过对同种已知蛋白质Attacin A cDNA中氨基酸密码子的出现频度进行分析，采用出现频度高的密码子带入葛佬素蛋白质序列中进行葛佬素的cDNA序列构建，用化学合成法及聚合酶链式反应进行目的基因的合成，另外，采用基因重组法制备抗菌肽葛佬素，并测定了其活性。

A new glass coating technology to combine the method of ionic pervasion colouration with the technique of chemical vapour deposition was adapted.

将离子渗透着色技术和化学气相沉积技术加以结合，在浮法玻璃生产线的锡槽内和AO区进行2次镀膜形成复合膜，克服了单一镀膜技术存在的不足。

The preparation method comprises the steps as follows: pulverizing; alkalizing and stewing plant straw to obtain fibrous pulp; mixing the fibrous pulp with bentonite and milling; conducting sodium treatment, chemical modification and purification to obtain modified composite bentonite pulp; separating, drying, etc., to prepare the composite fibrous material.

本发明涉及一种路用秸秆复合纤维材料的制备方法，该制备方法是将植物秸秆经过粉碎、碱化、蒸煮后的纤维浆与膨润土经过磨细、纳化、化学改性和提纯后得到的改性膨润土浆复合，并经分离、干燥等制备出的复合纤维材料。

A method for the detection of Brominated Flame Retardants in wastewater by gas chromatography-negative ion chemical ionization mass spectrometry has been developed.

建立了气相色谱负离子化学电离源质谱法测定污水样品中溴代阻燃剂的分析方法。

A new crosshatching technology on polyimide flexible substrate is described using chemical etching method.

介绍了一种在挠性聚酰亚胺基材上开窗口的新工艺。

It is a new method of natural fibre development to study on chemical degumming of eulaliopsis binata.

本课题主要内容是研究龙须草的化学脱胶工艺。

PAO was purified by Ni-NTA resin under denature condition and dialyzed to recover its native structure. After that, the enzyme activity was analyzed with chemical fluorescent method.

IPTG 诱导表达的重组PAO经Ni-NTA亲和层析纯化和透析复性后，化学荧光法测定酶活性。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。