查询词典 iodine number

In the medium of H2SO4 with KBr as the catalyst, the color of Cresol Red oxidized by iodate can be faded, and the degree of color fading is proportional to the concentration of iodine and the linear range of determination is 20 μg/25 mL~50 μg/25 mL.

在硫酸介质中、在溴化钾催化条件下，碘酸根对甲酚红有褪色作用，且褪色的程度与碘酸根的量有关，碘定量测定的线性范围为20μg/25mL～50μg/25mL，检出限为6。

The method was based on the inhibition effect of iodine on the nitrite catalyzed oxidation of cresol red by potassium bromate catalyzed by nitrite in dolute sulfuric acid medium.

研究了在稀硫酸介质中，痕量碘离子对亚硝酸根催化溴酸钾氧化甲酚红的阻抑作用，建立了测定痕量碘离子的阻抑动力学光度分析的新方法。

The word "cretin" is believed to come from a mountain dialect of French, apparently because iodine deficiency in the Alps produced so many cretins.

cretin这个词可能就是来自法国山区的方言，因为在阿尔卑斯地区由于碘缺乏，有很多cretin患者。

Cretinism occurs when the mother does not have sufficient iodine in her diet at a certain point during pregnancy.

当母亲在怀孕期间的某个特定时间点上没有能够从她的日常食物中获取足够的碘的话，就会导致婴儿克汀病的发生。

In Tibet, because of the iodine deficiency disorders, in some areas cretinism ranged from 2.94 per cent up to 13 per cent.

在西藏，由于缺碘症，某些地区的克汀病发生率少则2.94%，高则达13%。

In 2000, the stage goal of eliminating iodine deficiency disorders has basically been reached, but there was still subclinical cretinism in ID areas although iodized salt has been supplied.

但是，每年仍有200～300万新生儿及部分孕妇和哺乳期妇女存在碘缺乏纠正不足的危险。

In the same time, we synthesized a ketone containing iodine and determined its crystal structure by X-ray diffraction.

同时，我们通过Heck反应，合成了一个含碘不饱和酮，通过X-晶体衍射对该单晶化合物进行了晶体结构测定。

We also discussed this unusual reaction process and proposed a reasonable "one method,two paths" mechanism.These novel iodine-mediated oxidative cycloadditions provide a rapid and efficient route to the preparation of a variety of spiro dihydrofuran and cyclopropane derivatives.

该反应不使用昂贵的催化剂；反应过程中不使用有毒有害的有机溶剂，对环境友好；反应时间短，收率高；在相同条件下得到不同结构的产物，这提供了一种新型的合成二氢呋喃和环丙烷结构的环化反应。

In either case, daub the end with iodine or a commerical disinfectant.

在这两种情况下， daub年底与碘或商业消毒剂。

Of the students of the grade five and 26% of housewives knew the harmfulness of iodine deficiency disease.

结论五年级学生健康教育不理想，应加强对学生的健康教育，促进学生对家长的碘缺乏病知识健康教育。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？