查询词典 reagent

0 H; reaction temperature: 140～ 150°C ; molar ratio of p toluene sulphonic acid to salicylic acid, 1∶11, with no water carrying reagent; yield: about 98%.

应用对甲苯磺酸作为水杨酸和 2 -乙基己醇的酯化催化剂，成功合成了水杨酸- 2 -乙基己酯。

Through analyzing of the theory and the results, we concluded that method 2, namely mixed reaction of defatted soy flour, Urea-SDS solution and Ellman's reagent, can determined exactly sulphydryl content of defatted soy flour.

通过理论和数据分析得到，方法二即脱脂豆粕、尿素－SDS溶液和Ellman's试剂相混合反应可用于测定脱脂豆粕中的巯基含量。

The dry heated defatted soy flour was treated with three different methods respectively. then the sulphydryl content of defatted soy flour was determinated with Ellman's reagent.

采用3种不同方法对干热处理后的脱脂豆粕进行处理，再加入Ellman's试剂来测定脱脂豆粕中的巯基含量。

In order to get the aryl alkynyl thio ether, we need to synthesize some important terminal functional compounds. Based on the preceding reaearch of our laboratory, we selected methyl thio methyl phenyl sulfone as nucleophilic reagent to eract with aromatic aldehyde and synthesized successfully a series of methylthio aryl ethynes I_ by"one-pot"reaction .

本论文在大量的文献调研和本实验室过去研究结果的基础上，利用亲核硫试剂甲硫基甲基苯基砜(methylthiomethyl phenyl sulfone， MP-S)与芳香醛的&一锅反应&，成功的合成了一系列甲硫芳炔化合物I_，从而为实现形态各异的芳炔硫醚类分子提供了一个良好的构筑平台。

Sodium Thiosulphate, Crystal, Pentahydrate

Reagent 硫代硫酸钠，晶体，五水化物，试剂 500 g

In the original titrimetric solution, known as Karl Fischer Reagent, the sulfur dioxide and iodine are dissolved in pyridine and methanol.

在最初的滴定溶液里，已知的是卡尔费休试剂，二氧化硫和碘溶解在吡啶和甲醇中。

Xi'an Tooken Biotech Co., Limited is located in Xi'an, which enjoys long history and brilliant culture as well as convenient communication, it's established by several experienced professionals and specialized in the production of Laboratory reagent, instrument and Consumables.

西安托克生物科技有限公司位于历史悠久、文化灿烂、交通便捷的十三朝古都—西安，是由业内几位资深人士创立的一家专门从事实验试剂、仪器、耗材的企业。

Xi'an Tooken Biotech Co., Limited is located in Xi'an, which enjoys long histy brilliant culture as well as convenient communication, it's established by several experienced professionals specialized in the production of Labaty reagent, instrument Consumables.

西安托克生物科技有限公司位于历史悠久、文化灿烂、交通便捷的十三朝古都—西安，是由业内几位资深人士创立的一家专门从事实验试剂、仪器、耗材的企业。

It was found that tribromide quaternary ammonium salt was an excellent bromide reagent, which was easy to handle and had low toxicity. The reaction can process rapidly and has high bromide rate.

研究结果表明，三溴季铵盐是一种性能优良的固体溴化剂，操作方便，对人体的危害性小，反应速度快，溴化率高。

The authors carried many researches of the feasibility about enriching and separating trace zinc from almost cadmium, and the rate of recoveries of several common metal ions according to this methodo Through repeatedly probed and tried out, at last, a thought as collaborated with traditional methods was established - using diantipyrinylmethane as complex reagent ,with ammonium thiocyanate and zinc forming the triple ionic compound in the medium of hydrochloric acid , extracted by trichloromethane, extracted the organic system by ammonium hydroxide in order to gain zinc .

本文主要研究了从镉基体中富集分离微量锌的可行性，以及采用该方法几种常见金属离子的回收率。通过反复的摸索、试验，最终确立了与传统方法相结合的思路—采用二安替比林甲烷作为络合剂和硫氰酸铵、锌在盐酸介质中形成三元离子缔合物，用三氯甲烷作为萃取剂，最后用氨水作为反萃剂将有机相中的锌洗脱出来与镉分离。

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。