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The method of liquid phase rearrangement of styrene oxide to phenylacetaldehyde catalyzed by SAStype solid acids and molecular sieves was studied.

研究了SAS几种分子筛上氧化苯乙烯液相重排成苯乙醛的反应,考察了催化剂的活性、选择性稳定性。

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The rearrangement of acetone oxime in the Beckmann solution involves three acetic acid molecules and one proton (present as an oxonium ion).

模拟表明,有三个乙酸分子一个质子(以氧鎓的形式纯在)参与了反应。

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Citral was synthesized by catalytical rearrangement of dehydrolinalool in toluene solution with the present of molybdenyl acetylacetonate, benzoic acid and dimethyl sulfoxide (DMSO).

摘要采用脱醇为原料,在乙酰丙酮酸钼、苯甲酸、二甲基亚砜(DMSO)的甲苯溶液中催化重排合成柠檬醛,考察了柠檬醛在不同系中的热敏性。

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PBS趣味科普

So we can do some rearrangement, take the log of both sides.

所以我们可以新安排一下,把两边同时取 log 值。

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潮流科技大事件!

It's a 4 point rearrangement, with a flash and triple Leica cameras.

采用四眼排列,一个,三个徕卡摄像头。

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透视百科科技类

We know that radiation causes or will induce these chromosome aberrations, or rearrangement of the chromosomes.

我们已知辐射会引起或诱发染色体畸变或排。

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双语版 TED-Ed 演讲精选

One classic proof often attributed to Pythagoras himself uses a strategy called proof by rearrangement.

经典证明是毕达哥拉斯自己做出,他利用了一种名叫排列证明方法。

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复活

If she married Simonson, his presence was no longer necessary, and that required a rearrangement of his projects.

如果她嫁给了西蒙森, 就不再需他在场了, 这就需新安排他计划。

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六级晨读美文

Enter the executive editor, who makes a suggestion requiring a more-than-modest rearrangement of the design and the addition of an information box.

输入执行编辑,他提出了一个建议,求对设计进行非常适度新安排并添加一个信息框。

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Scishow 精选系列

Aerating also exposes the wine to oxygen, and oxygen causes oxidation: a rearrangement of electrons that can shift a chemical's properties and help break down molecules.

透气还会使葡萄酒暴露在氧气中,而氧气会导致氧化:电新排列可以改变化学物质性质并帮助分解分

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还乡

In a dim light, and with a slight rearrangement of her hair, her general figure might have stood for that of either of the higher female deities.

线微暗时,只将发式稍加修整,她整个体态便完全可以看作是任何一个高贵女神。

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SciSHow 快问快答小科普

Aerating also exposes the wine to oxygen, and oxygen causes oxidation: a rearrangement of electrons that can shift a chemical’s properties and help break down molecules.

充气也会使葡萄酒暴露在氧气中,而氧气会导致氧化:电新排列可以改变化学物质性质并帮助分解分

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Osmosis-血液肿瘤

These centroblasts have a rearrangement of their immunoglobulin genes, and some of them undergo a class switch where they change from producing IgM antibodies to producing IgG or IgA antibodies.

这部分中心母细胞免疫球蛋白基因发生了排,其中一些会经历Ig类别转换,从产生IgM变成产生IgG或IgA。

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2017级专外有声

Many modern molecular tests such as flow cytometry, polymerase chain reaction (PCR), In situ hybridization, immunohistochemistry, cytogenetics and gene rearrangements studies fall within the territory of pathology.

许多现代分检测,如流式细胞术,聚合酶链反应(PCR),原位杂交,免疫组织化学,细胞遗传学和基因排研究都属于病理学领域。

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