碘的

Thd polymerization of butadiene in benzene in the presence of titanium tetraiodide triisobutyl aluminium catalyst has been studied.

研究了丁二烯在苯中有四碘化钛-三异丁基铝催化剂的存在下的聚合。

This paper is a development of the classic method determining the concentration of chlorine dioxide in an aqueous.

该文在经典碘量法的基础上，提出了一种测定ClO2 +Cl2 混合体系中ClO2和Cl2 含量的方法。

Acording to the literature, we improved the yield of N- [4- benzy] cinchoninum bromide from cinchonine.

对光学活性的相转移催化剂N-4-碘苄基辛可宁溴酸盐的进行了改良合成。

A new chiral quaternary ammonium salt 1a was synthesized by the reaction of cinchonine and(2,4,6-)trimethyl benzyl chloride.Etherification between 1a and benzyl bromide,allyl chloride,or methyl give corresponding etherified quaternary ammonium salts 1b,1c,and 1d.

由辛可宁和2，4，6-三甲基苄氯，合成了一种新的手性季铵盐(1a)，并进一步用苄基溴、碘甲烷和烯丙基氯对分子中的羟基进行醚化，得到相转移催化剂1b、1c和1d。

The result in extreme cases is large goiters that swell their necks, or other obvious impairments such as dwarfism or cretinism.

碘缺乏最严重的后果是脖子上出现甲状腺肿，或者是明显的残疾，比如呆小症和侏儒症。

Healthy Tibetans without IDD, without cretinism, and with a higher IQ, will ensure that Tibet reaches its full economic and social potential.

没有了缺碘症、没有了克汀病；健康、高智商的西藏人民定能使西藏地区的经济和社会潜能得到全部地发挥。

The radiation imaging array solid detector includes flash crystal of cesium iodide or cadmium tungstate, photodiode coupled with the flash crystal and casing holding the flash crystal and the photodiode.

本发明包括由碘化铯或钨酸镉形成的闪烁晶体和与之耦合的光电二极管，闪烁晶体和光电二极管由壳体包容。

The deoxygenation and reduction of some organic substrates with samarium diiodide were investigated.

本文研究了二碘化钐对一些有机化合物的脱氧反应，以及它在醇存在下对α-卤代酮、偶氮苯和苯醌的还原反应。

The mechanism was supposed as follows: polyfluoroalkyl iodides were initiated by sodium dithionite to give R〓 which was added to one double bond of diallylacetic acid, after the sequential radical cyclization and nucleophilic substitution to form bicyclo-lactones.

这是因为：多氟烷基碘化物在连二亚硫酸钠的引发下，得到自由基R〓，后者加成到二烯丙基乙酸中的一个—C=C—双键上，然后在碱性介质中进行分子内亲核反应得到双环内酯类产物。

Polyfluoroalkyl iodides could react with unsaturated olefin acids in the presence of sodium dithionite by radical addition to give adducts. It was found that these adducts could form polyfluoroalkyl substituted γ or δ-lactones due to intramolecular nucleophilic substitution in the alkali solution.

研究发现：多氟烷基碘化物在连二亚硫酸钠存在下与不饱和烯酸经自由基加成得到的产物，能在碱性条件下进行分子内亲核取代反应形成五元或六元环的含氟内酯类化合物。

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。