查询词典 reagent

The synthesis and application of Grignard reagent play a very important role in the teaching of the organic chemistry and organic experiment. The students must hold the experiment on synthesis of Grignard reagent which has been placed on the organic experimental books.

格氏试剂的制备及其应用在有机化学及实验教学中占有非常重要的地位，是学生必须掌握的一类实验，是各类有机化学实验教材中必列的实验内容。

This paper compares the similarities and differences between Grignard reagent and reformatsky reagent from two aspects,which are preparation and reactivity,and analyses the reasons that cause differences from the two reagents' structures.

文章从制备方法、反应活性两方面比较了格氏试剂与有机锌试剂的异同点，并从结构上进行分析，找出了产生差异的原

Schiff ' s reagent A reagent used to detect the presence of aldehyde and ketone groups in certain compounds.

Schiff 试剂：供检测特定化合物中是否有醛和酮类物质的一种试剂。

The result of the experiment showed that the qualitative medium - speed filter paper can be used as the material of the nitrite - detecting paper: color developing reagent A containing 4 - aminobenzene sulfonamide and N - 1 naphthyl ethylenediamine hydrochloride, and mixtures of 1 : 1 naphthylamine solution and sulfanilic acid solution as color developing reagent.

实验结果表明：定性中速滤纸可以作为亚硝酸根试纸的材料；含有4-氨基苯磺酰胺和N-1-萘基乙二胺盐酸盐的显色剂A及含有1：1的α-萘胺溶液和对氨基苯磺酸溶液的显色剂B，按1：1混合后可以作为显色剂；通过应用实验表明，亚硝酸根试纸具有体积小、便于携带、检测方便、成本低廉等特点。

ReShi Chemicals is a specialist in manufacturing and distributing metal surface treatment reagents: phosphorus treatment reagent, paints fog coagulating agent , electro-plating additive reagents, normal temperature nigrescence reagent, pre-treatment reagents ;refinishing paint total solutions; rare earth oxide compound ;offer burning inhabitor and deadening agent for rubber,special paints and Nylon industry.

专业为金属加工行业提供磷化处理药剂、水处理剂、电镀添加剂、钢铁常温发黑剂以及前处理产品；为汽车行业提供专业的汽车修补漆整套解决方案，喷漆房水处理解决方案；为玻璃陶瓷行业提供高性价比的稀土金属氧化物产品；为橡胶尼龙，涂料以及化妆品行业提供高效阻燃剂及消光剂。

According to the results of experiments, we get to know that the diameters of particles of C.I. Vat Blue 4 are about 0.5μm, which meets the requirement of spun-dyed viscose as a dyed-reagent. The choice range of color will be increased when pigmental dye is used as a dyed-reagent for spun-dyed viscose.

通过实验可知，对还原蓝RSN进行颜料化后，其粒径可以达到甚至低于0.5μm的水平，满足粘胶纺液着色加工时对着色剂的粒径要求，可以应用于粘胶的纺液着色纺丝加工，这将扩大纺液着色加工时对色彩的选择范围。

We want to buy Urine Strips Reagents, Prothrombin Reagent, Rapid Test Chemical Reagent

我们要采购试药，凝血素试药，迅速的测试化学的试药

In the residual titration, excess Reagent is added to the test specimen, sufficient time is allowed for the reaction to reach completion, and the unconsumed Reagent is titrated with a standard solution of water in a solvent such as methanol.

在回滴定法，过量的卡尔试剂加入到待测样品中，给与足够的时间去达到反应完全，未消耗的卡尔试剂用溶于溶剂例如甲醇的标准水溶液去滴定。

The pipeline system was cleaned with alkalic reagent at high temperature, sometime it was cleaned with acidic reagent regularly. During the CIP system design, the running processing of the system was described mainly, and for the purpose of giving a better CIP system, the factories which affect the running of system was emphasized designed, for example, preventing gas enter the pumps, return liquor's filtration, circle heating system and so on.

在CIP系统的设计过程中，重点对该系统的运行过程进行叙述，对影响系统正常运行的因素如：气蚀问题、回液的过滤处理、循环加热等环节都进行重点设计，以使CIP系统更趋完善。

Terminated DFA-PEG-PPG tripolymer polyester,which was synthesis by adding long chain fatty acid or fatty alkanol into the reactionsystem, contained not only chain lipophilic group but also polyester-polyether group,and had the building effection of alkanol antifoaming reagent and polyether one. Thenovel design theory for structure of antifoaming reagent was put forward by studyingperformance of product.

这种新型结构聚酯的合成，为消泡剂分子结构的设计提出了一种的思路；采用嵌段聚合方法所合成的_m-_n嵌段聚酯型高分子表面活性剂，其分子量比DFA-PEG和DFA-PEG-PPG三元共聚酯的分子量更大，所表现出的乳化性能更为优秀。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。