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The FTIR spectrum of DTC-TETA showed strong absorption peaks at 1 461-1 388 cm-1 and 1 174-996 cm-1 which were attributed to partly double bonds of C and C,respectively.The UV spectrum of DTC-TETA had two absorption peaks at 265 and 290 nm,assigned to π—π* transition of N…C…S radical and nonbonding electron n—π* transition of S…C…S radical to conjugated system,respectively.

在DTC-TETA的红外光谱图中,在1461-1388cm-1处和1174-996cm-1处分别出现含有部分双键性质的〖JGC〖ZJXS,YN键和键的特征吸收峰;在紫外光谱图中,分别在265和290 nm处出现两个最大吸收峰,分别对应于N…C…S基团的π—π*跃迁和S…C…S基团中原子上非键电子向共轭体系的n—π*跃迁;元素分析结果表明该化合物中碳、氢、氮、的摩尔比近似为

The thermal stabilities of dithioesters, trithiocarbonates and xanthates were also compared,indicating that trithiocarbonates and xanthates are more stabile than dithioesters,while the chain transfer abilities of the latter are usually better than that of the former.So how to balance the chain transfer ability and the thermal stability of RAFT agents is a big challenge.

另外我们比较了双酯、三酯和磺原酸酯的热稳定性,发现后两者的热稳定性要远远好于前者,但前者的链转移能力一般要大于后两者,所以如何平衡链转移剂的链转移能力和其热稳定性之间的矛盾仍然是个很大的挑战。

This antioxidant network is composed of numerous components that include vitamins, minerals and special chemicals called thiols (glutathione and alpha-lipoic acid).

这是网络的抗氧化剂组成的多个组件,包括维他命,矿物质和特殊化学品称为醇(谷胱甘肽和α-辛酸)。

It was found that both aliphatic and aromatic thiols promoted th photooxygenation process, leading to obvious decrease in an induction period of polymerization.

实验结果指出,芳香族和脂肪族的醇都能加速体系中的光氧化反应,使聚合反应诱导期缩短,芳香族醇对聚合反应的加速作?

Thiols, serving as low surface energy materials, can be adsorbed on the surface of ZnO, and the adsorption layer become denser and stronger with the increasing of carbon chain in thiols.

表面能较低的醇分子可以吸附在ZnO表面,并且随看醇分子中碳链的增长,其在ZnO表面形成的吸附层越致密牢固。

Under the same conditions, activity of thiolphenol is much lower than that of thiols. An electron withdrawing group on the benzene ring can decrease the reaction activity, but an electron donating group on the aliphatic compound can increase it.

在相同的反应条件下,苯酚的反应活性明显低于醇的反应活性;巯基化合物中吸电子基团会使反应活性降低,而推电子基团会使反应活性提高。

There was no safety testing of Thimerosal in children befo re it was put into pediatric vaccines.

柳汞被放进儿科疫苗之前,并没有作过儿童的柳汞的安全性试验。

The key of the two-stage process is the development of high active noble metal catalyst with fine sulfurresistibility.

本课题以开发抗500μg/g的贵金属催化剂为目标,进行了比较系统的金属催化剂抗性应用基础研究。

The research has suggested:(1) The alkaline metal of load and absorbent A and having active materials and absorbent B twin towers of the catalyst to contact and is used of the metal oxide of transition, having better results to get rid of various kinds of sulphides, such as hydrogen, sulphur alcohol,etc. The sulphur holds can be more than 14%.

研究认为:(1)负载碱性金属及过渡金属氧化物的吸附剂A和带有活性物质和催化剂的吸附剂B双塔串联使用,对脱除化氢、醇等化物有较好效果,容可达14%以上。

It has found that the liqnids exiting in the coatings can be divided into three types: the first is composed of pure alkali sulphate molten; the second, alkali sulphate with some calcium silicates dissolved in; the third, a mix molton of alkali sulphates with clinker liquid.

研究发现,窑尾系统结皮物料中所出现的液相共有三类。一类是主要是纯碱熔体;第二类为部分熔有硅酸钙的碱熔体;第三类为有部分熟料液相参与的混合液相。它们在结皮过程中扮演不同的角色。

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

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