查询词典 chemical method

Lead carbonate ; chemical precipitation method ; TEM

碳酸铅；均匀沉淀法；透射电镜

People carried out a lot of study on the physical and chemical properties of the SW, poisoning mechanism, pharmacological activity and toxicological. So how to prevent the locoweed poisoning of animals by the method of immunization has become a research hotspot.

人们对SW的理化性质、中毒机理、药理活性和毒理学等进行了大量研究，而如何通过免疫的方法预防动物疯草中毒已成为目前研究的热点。

The invention discloses a method for measuring seawater chemical oxygen demand by photometry, wherein the seawater exemplar is first pre-processed, then using the basic potassium hypermanganate as reaction system, the potassium permanganate is deacidized quantitatively by organics to produce manganate, using pure water or margin solution as reference ratio, measuring the absorbance an of the manganate at its maximum absorbing wave length 430 nm, drafting the A-COD value operating curve, obtaining the concentration of the organics in the water, i.e.

本发明公开了一种对海水化学需氧量进行测定的光度测定法，该方法首先将海水样品进行预处理，再以碱性高锰酸钾为反应体系，这样海水中的有机物在强碱性介质中与过量的高锰酸钾迅速反应，高锰酸钾被有机物定量还原后生成锰酸盐，以纯水或空白溶液作参比，在锰酸盐的最大吸收波长430nm处测其吸光度A，该吸光度A与海水样品中的有机物的含量具有正相关关系。

The garment by, towel the disinfection that wait, appropriate disinfects the boil such as cotton mercery and diaper 10-20 minute, or immerse with acid of 0.5% second crossing oxygen alexipharmic 0.5-1 hour, disinfect a method to can using chemistry fabric of a few chemical fibber, silks and satins to immerse only.

衣被、毛巾等的消毒，宜将棉布类与尿布等煮沸消毒10-20分钟，或用0.5%过氧乙酸浸泡消毒0.5-1小时，对于一些化纤织物、绸缎等只能采用化学浸泡消毒方法。

In this paper the applications of mesitylene in dyestuff, medication and chemical industry etc. were summarized. From the literatures, we generalized the merit and defect of all kinds of methods and presented that the method of extraction rectification is effective and worth of research.

本文概述了均三甲苯在染料、医药、化工等令贞域中的应用；针对合成分离均三甲苯中存在的问题，查阅了大量的国内外文献，总结并分析了各种合成分离方法的优缺点，提出萃取精馏方法是生产均三甲苯的一种有效方法。

In the gas-liquid phase reaction of catalytic oxidation of mesitylene by air to synthesize trimesic acid and the related process,an analysis method of reaction components was proposed,which includes chromatographic analysis,mass spectral analysis,IR spectrum,atomic absorption spectrophotometer and chemical titration for the purpose of analyzing reaction groups.

针对均三甲苯气液相催化空气氧化合成均苯三甲酸的反应及相关的工艺过程中，反应产物均苯三甲酸的分析问题，提出以色谱分析、质谱分析、红外光谱分析、原子吸收光谱分析及化学滴定为主要分析手段对反应组分进行分析，重点研究并建立了相关的分析方法。

In this paper, TiC\TiN\TiCN nanocrystals were successfully prepared at low temperature via chemical metathesis method.

寻求简单而经济的合成方法来制备这些材料具有重要的理论和现实意义。

Furthermore, TiCN nanocrystals were synthesized at 420 for 8h using TiCU, CCl4 and NaN3 via chemical metathesis method.

通过TiCl_4，CCl_4和NaN_3之间的化学交换反应，在420℃加热8小时也制备出了TiCN纳米晶体。

Topical treatment for new premises means a lot of toxic gases, but the current market sales of synthetic chemical sprays are generally used method is the elimination of formaldehyde and other poisonous gases and produce secondary pollution.

时下对新房有毒气体的治理手段不少，但目前市场上销售的气雾剂一般都是采用化学合成的方法，难免在消除甲醛等有毒有害气体的同时产生二次污染。

The first control method is a kind of perturbation control and can stabilize the BZ-CSTR chemical chaos to its embedded unstable periodic orbits.

第一种控制方案是一种微扰控制，并能将BZ-CSTR化学混沌稳定控制到其内嵌的不稳定周期轨道上去。

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％。