查询词典 benzoic

The method is simple with good accuracy and precision, and it can measure two kinds of material quickly and simultaneously. The method can be used for detection of saccharin sodium and benzoic acid in a large number of food samples.

该方法操作简便，可同时快速测定2种物质，具有良好的准确性和精密度，可应用于大量食品样品中糖精钠和苯甲酸的检测工作。

Many processes were used to refine benzoic acid. Each process has its advantages and disadvantages and can be used in different production conditions.

苯甲酸精制方法有很多种，每种方法都有各自的优缺点，适用于不同的生产条件。

This paper reports on oscillatary reaction using benzoic acid cortainingmethylene radical hydrogen as medium.

本文报导了以不含亚甲基活泼氢的苯甲酸为底物的化学振荡反应。

The optical waveguides fabricated by using single benzoic acid and 60% ratio dilution were analyzed by double crystal X-ray diffraction.

用双晶X射线衍射法对单苯甲酸和混合摩尔比为60%制作的光波导进行X射线衍射。

A new series of short range donor acceptor systems consisting of anthracene and different substituted benzoic esters were synthesized.

设计合成了一类以蒽为电子给体，带不同吸电子取代基的苯为电子受体的新型短程有机电子给体受体体系。

The UV-absorption characteristics of benzaldehyde and benzoic acid were discussed, and the quantitative analysis method was developed.

研究了苯甲醛、苯甲酸的紫外吸收特性，建立了同时测定两者含量的方法。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后，在游离基条件下进行侧链的氯化，得到2，4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解，经过2，4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离)，得到2，4-二氯-5-氟-3-甲酰苯甲酸，将其醛基反应，得到2，4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸，用酰氯从其中除去水，同时将羧基转化为碳酰氯，得到一种腈，即2，4-二氯-3-氰基-5-氯-苯甲酰氯。

Mmol/L benzoic acid was used as eluent. The effect of benzoic acid concentration, pH value on the retention time was studied.

实验过程中，对流动相组成，流动相pH值变化对各种有机酸保留时间的影响作了详细的探讨。

To evaluate the allelopathy effects of benzoic acid and ρ-hydroxybenzoic acid on watermelon, this paper studied the effects of benzoic acid and ρ-hydroxybenzoic acid on watermelon seed germination and seedling growth by seed soaking, seed-bud soaking and seedling irrigation.

为探明苯甲酸、对-羟基苯甲酸对西瓜的化感作用，采用浸种、浸芽和浇灌幼苗的方法分别研究了苯甲酸、对-羟基苯甲酸对西瓜种子发芽和幼苗生长的影响。

The present paper reports three new europium complexes,EuL3(H2O) 6,EuL3Phen(H2O)4 and EuL3(H2O)5,synthesized with Eu(NO3) 3·6H2O,2-(4-fluorobenzoyl) benzoic acid,Phen and TPPOL=2-(4-fluorobenzoyl benzoic acid,Phen=1,10-phenanthroline,TPPO=triphenyl phosphine oxide.

以硝酸铕、2-(4-氟代苯甲酰基)苯甲酸、1，10-菲咯啉和三苯基氧膦合成了EuL 3(H2O)6，EuL3Phen(H2O) 4和EuL3(H2O)5三种固态配合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。