查询词典 chemical method

A series of hydrotalcites were synthesized using high saturated method and were characterized by XRD, IR and TG. The impact of hydrotalcite's chemical composition and crystal structure were studied by changing the molar ratio of Al to in the samples.

基于此，利用高过饱和沉淀法合成了一系列的Zn-Al-HTlc，并通过XRD， IR和TG进行了表征，研究了样品中的n/n，即x对Zn-Al-HTlc化学组成、晶体结构的影响。

Hydroxyacetic acid was synthesized by glycolonitrile in the presence of H2SO4 , and it was separated by applying extraction based on chemical complexation and solvent method.

以羟基乙腈为原料，在酸性条件下水解合成羟基乙酸，并采用络合萃取法和溶剂溶解法分离羟基乙酸。

This method could be used to study some chemical changes induced by hyphal activity.

这一方法的建立为进一步研究菌丝际的生理、生化特性创造了条件。

For developing students'creative ability of chemical engineering and technology,provided a new practical teaching method that is made in practical teaching,imitational teaching,practice base in school connects with practice base out of schoolI.

化工专业实践教学从培养学生的创新能力出发，提出由实验教学、仿真教学、校内实践和校外实践4个模块组成的实践教学新模式。该教学模式对学生知识、能力、素质的协调发展起到重要作用，毕业生就业方向明显拓宽

Results demonstrated that the molecular connectivity indices and quantum chemical parameters could be used to predict the k'for 18 substituted indoles, and the molecular connectivity indices MCI method was more accurate.

成功地利用色谱保留预测有机污染物的Kow和Sw等环境行为参数，发现甲醇含量为60%时容量因子同化合物Kow相关性最好。

At first, the nanometer level cage structure, good thermodynamical and chemical stability and inflaming retarding properties, and relative merits of sol-gel synthetic method of POSS are introduced.

重点介绍了POSS改性传统聚合物的作用：如提高聚合物的使用温度，降低聚合物的介电常数，提高改性体系的力学性能和阻燃性能。

Anaerobic Biological method is used to dispose the wastewater of chemical fiber in a reactor of 5L,the static experiment and the development experiment are used to study the influenceable factors:hydraulic retention time,concentrational fluctuation and stirring intensity.

对化纤废水采用厌氧生物处理进行研究与分析，以总容积5 L的反应器对废水分别进行静态和动态试验。

In this paper the method for determining Fe in the CIPM solution Ⅱ is described for the first interlaboratory study of the CIMP Working Group on Metrology in Chemical Analysis.

本文报道为完成国际计量学会化学计量工作组（WGofMetrologyinChemicalAnalysis）组织的IDMS国际合作研究建立的Fe的测量方法。

The results of the present research are as follows, The correlation between physico-chemical properties of organic compounds and their competitive power was studied, and it was indicated that organic compounds preferable to form H-bonding with organic matter of sorbents have stronger competitive power; Sorption behaviors of ionizable organic compounds in different species and their competitive power were examined, and the results showed that phenols and carbonxylic acids with benzyl circle have much stronger competitive power in molecular species than in ionized species, because negative charges of anionic forms can depressed their adsorption on the surface of the sediment; in contrast, organic bases such as aniline and p-chloroaniline show weaker competitive power in molecular species than in ionized species, and this is because both species of the organic bases could adsorb strongly onto the sediment; there is a correlation between competitive power of organic pollutants in multi-solute systems and their sorption isotherm nonlinearity in single-solute systems, and organic compounds whose sorption isotherms is linear in single-solute systems hardly have competitive power in multi-solute systems; Competitive sorption effects in more than two-solutes systems was studied, and it was exhibited that mixture of two cosolutes each of which could suppress sorption of nominal solute onto the sediment had synergistically competitive sorption effect on the nominal solute; A method about incorporating sorption/desorption of organic pollutants into river water quality model was developed, and discussion about degree of sorption/desorption effect on model prediction for different organic compounds was made, which will provide theoretical basis and practical processes for setting up more accurate water quality model.

论文主要取得了以下研究成果。(1)有机化合物的吸附竞争能力与其物化性质具有相关性，易与沉积物有机质形成氢键的化合物其竞争能力也比较强；(2)可离子化有机化合物的吸附竞争能力与其存在形态有关。酚类、含苯环的羧酸类化合物，其离子态的吸附竞争能力远小于分子态，其机理为有机酸阴离子所带的负电荷抑制了表面吸附能力，主要发生分配作用；而苯胺类化合物，其离子态和分子态都表现出显著的竞争能力，而且离子态的竞争能力略强于分子态，原因在于有机碱阳离子所带的正电荷促进了其表面吸附能力；有机化合物竞争能力的强弱与其单组分吸附等温线的非线性程度具有一定的相关性，吸附等温线近似为线性的化合物没有或只具有微弱的竞争能力；(3)对目标有机化合物的吸附具有竞争效应的有机化合物混合后，将对目标有机化合物的吸附产生协同竞争效应；(4)以京杭运河为例，率先提出了将有机污染物的吸附／脱附作用及水文水力参数耦合到水质模型中的方法，并讨论了吸附／脱附作用对不同有机污染物预测模型的影响，为建立更准确的水质模型及进行更客观的风险和生态评估提供了参考依据。

Objective:To establish a RP-HPLC method to quantify a new chemical entity HZ08N-cyano-1-[(3,4-dimethoxyphenylmethyl]-3,4-dihydro-6,7-dimethoxy-N -octyl-2(1H)-isoquinoline carboximidamideand its related substances.

目的：建立HZ08N-腈基-1-[(3，4-二甲氧基苯基甲基]-3，4-二氢-6，7-二甲氧基-N-辛基-2(1H)-异喹啉碳酰亚胺的含量测定及有关物质检查方法。

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％。