查询词典 thiourea

TCCA,SDIC,calcium hypochlorite,citric acid,potassium sorbate,sorbic acid,sodium chlorate,polymeric polyol,sodium persulfate,ammonium persulfate,ascorbic acid,sodium benzoate,thiourea,thiourea dioxide,oxalic acid.

提供产品：三氯异氰尿酸，二氯异氰尿酸钠，漂粉精，柠檬酸，山梨酸钾，山梨酸，氯酸钠，聚合多元醇，过硫酸钠，过硫酸铵，维生素C，苯甲酸钠，硫脲，二氧化硫脲，草酸。

According to the properties of substituted thiourea derivatives,4 symmetric and 12 unsymmetric thiourea compounds were synthesized by reaction of alkyl amine or substituted aniline with carbon bisulfide or some isothiocyanates .

针对不同活性的取代硫脲，采用脂肪胺或取代苯胺与二硫化碳或不同种类的异硫氰酸酯反应，合成了4种对称的和12种非对称的硫脲衍生物。

The synthesis of thiourea can be divided into two steps. First, cyanamide was produced by dehydration of urea. Second, cyanamide reacted with Na_2S in water solution, which produce thiourea and NaOH.

首先第一步通过尿素常压脱水制备氰胺，第二步氰胺与硫化钠溶液在一定温度下反应生成硫脲及氢氧化钠，而氢氧化钠与通入的硫化氢气体生成硫化钠，从而继续参与反应。

The results showed that the deposition rate increased at first , then went down with increasing concentration of thiourea or potassium iodate. The deposition rate was more significantly affected by thiourea than that by potassium iodate.

结果表明，沉积速率随硫脲、碘酸钾浓度的增大先升高后降低，碘酸钾对镀速的影响不如硫脲显著。

The baseline separation of 9 neutral compounds (thiourea, benzene, toluene, ethyl benzene, n-propylbenzene, naphthalene, n-butylbenzene, fluorene and anthracene) and 7 acidic, basic and neutral compounds (thiourea, o-aminophenol, phenol, benzene, o-methylaniline,α-naphthylamine, 2,4-dichloroaniline) can be obtained under optimized capillary electrochromatographic conditions.

在该均相硅胶基质整体柱上成功地分离了9种中性物质(硫脲、苯、甲苯、乙基苯、正丙苯、萘、正丁基苯、芴和蒽)以及7种中性、酸性和碱性物质(硫脲、邻氨基酚、苯酚、苯、邻甲苯胺、α-萘胺和2，4-二氯苯胺)。

Via the reacher on LJ-1, we know its water solubility is good,without emulsion inclination, has temperature＆salt-resistant ability,when it used with Zinc dihydrogen phosphate, sodium sulfite and scale inhibitors, the corrosion inhibitor effectiveness can enhanced,when used with Thiourea the corrosion inhibitor effectiveness can decrease,so it can not used with thiourea.

通过对LJ-1缓蚀剂进行性能评价，发现本品水溶解性较好；无乳化倾向性；具有一定的抗温性和抗盐性；将它与磷酸二氢锌、亚硫酸钠和阻垢剂进行复配时，能提高缓蚀剂的缓蚀效果，说明它的配伍性良好，当与硫脲复配时，它的缓蚀效果有所降低，说明它与硫脲不能复配使用。

This thesis includes five parts as follows.1. The backgrounds and some relative concepts of this work are briefly introduced. The photochemistry of benzamides and compounds with thiourea functional group is also concisely reviewed.2. Total of fourteen benzamides with different substituted groups have been synthesized and structurally characterized. Better photoreaction time for that kind of compounds at given concentrations is confirmed by tracking its'UV spectrum and GC chromatogram. A representative dibenzophenone photoproduct has been determined by X-ray crystallography. The mechanisms of photoreaction of benzamide have been proposed.3. Total of seven N-chloro(phenylmethylenebenzenamines with different substituted groups and sixty-one thiourea derivatives have been synthesized and structurally characterized.

论文的主要内容如下：1、简要介绍本论文工作的研究背景，并对苯甲酰胺和具有硫脲官能团类化合物的光化学研究进展进行简要的总结。2、合成与表征了14个具有不同取代基的苯甲酰胺类化合物，利用紫外光谱和气相色谱确定了此类化合物较佳光照时间，测定了一个具有代表性光解产物的单晶结构，提出了苯甲酰胺类化合物的光反应机理。3、合成与表征了7个带有不同取代基的氯代苯甲酰亚胺中间体及61个硫脲衍生物，测定了两个具有代表性化合物的单晶结构。

Three new kinds of thiourea - type chelating cotton cellulose, thiourea cellulose, thiosemicarbazide cellulose and diphenylthiourea cellulose, were synthesized in our Lab, and their absorptive characteristics for copper was investigated.

将自制合成的三种新型硫脲型螫合纤维素——硫晚棉纤维，氨基硫脲棉纤维和二苯硫脲棉纤维应用于钢的吸附性能的研究，采用火焰原子吸收法测定选择了吸附和解吸的最佳条件。

The oxidant 〓 plays indirect role in dissolving gold, and mainly controls the mix potential of Au in the alkaline thiourea solution. In which the "mix potential"is the decisive factor affecting the dissolution of gold. The reaction driving force is enough to have formamidine disulfide oxidize Au to Au〓 at the potential of about 0.4V. And then thiourea molecular complexes with Au〓 ion soon, which causes the fast dissolution of gold in the alkaline thiourea media. The dissolved weight of gold in 0.25 M thiourea solution with 0.05M Na〓SO〓 and 0.1M 〓 of pH 12. 5 by air at the temperature of 303K is 7. 8mg·cm〓 within 1hr.

在碱性硫脲溶金过程不起直接作用，而是通过S〓O〓来控制二硫甲脒有效形成的金在溶液中的混合电位；&混合电位&是影响碱性硫脲溶液溶金与否的决定性因素，在0.4V左右，有足够的推动力致使二硫甲脒氧化Au成Au〓，随后硫脲与Au〓络合形成稳定的络离子Au〓，从而使金快速溶解；温度为303K、pH为12.5时，在含0.05MNa〓SO〓、0.1M 〓及0.25M硫脲的溶液中，鼓入空气，金的溶解量在1hr内为7.8mg·cm〓；铜只有微量溶解，银、镍、铁则几乎不溶解。

The purpose of this thesis is just to search a novel synthesis of thiourea, and to use thiourea in dealing with the waste water from the production of phthalic anhydride, and the application of thiourea in solid-state reactions at low heating temperature was also studied.

本论文研究的目的就是寻找一种合成硫脲新的工艺过程，且尝试以合成得到的产物硫脲应用于工业苯酐废水的处理，同时对硫脲在低热固相化学中的应用进行了初步的探索。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。