羰基的

To our knowledge, however, it has never been used for reductive amination of carbonyl compounds, nor for reduction of pre-formed imines.

可是据我们所知，它还从来没有被用于羰基的还原氨化和用于一个已制亚胺的还原。

Using B3LYP method, the mechanism of NaBH_4 reducing carbonyl function and its selectivity was studied.

利用B3LYP方法，对硼氢化钠还原羰基的机理以及选择性进行了研究，计算得到的ee值跟实验值非常接近。

Quinone: Any member of a class of cyclic organic compound s comprising a six-membered unsaturated ring to which two oxygen atoms are bonded as carbonyl groups (-C=O; see functional group).

醌：在六元不饱和环中，含有两个紧邻的，或被乙烯基撑隔开的羰基的环状有机化合物的统称。

The Key step is the one-potreductive deoxygenation of 〓-unsaturated 〓-tosylhydrazone and reduction of 9-carbonyl with sodium borohydride.

关键步骤是以硼氢化钠为还原剂一步完成α，β不饱和腙的还原脱氧、双键重排以及9—位羰基的还原反应。

The photodegradation of 3.0～20.0 mg/L estrone in aqueous solutions was pseudo-first order reaction.

结果表明，雌酮在光降解时破坏了其苯环结构，生成了含有羰基的氧化产物。

Mannich reaction occurred directly between arylamine and pyrroli- zinone on hydrogen chloride/ethyl alcohol solution.

芳胺和吡里酮在氯化氢乙醇溶液中直接发生Mannich反应，但胺甲基化不是发生在羰基的α-位，而是发生在吡咯结构部分的5-位。

In addition, extracts of ApW and McW at 5 μg/mL could simultaneously prolong the lag phase of LDL, reduce TBARS and carbonyl formation.

此外，当提升萃取物浓度至 5 μg/mL时，ApW 与 McW已同时显示出有效延长LDL 氧化的迟滞期、减少TBARS与蛋白质羰基的形成。

Aiming at the shortcomings of high formaldehyde content and low soaping and crocking fastnesses of currently used pigment printing binder,by60Co-γ radiation polymerization process,the waterborne polyacrylate emulsion containing active keto groups was synthesized from acrylate monomers and diacetone acrylamide.

针对目前所用涂料印花黏合剂存在的色牢度低和甲醛含量高的缺陷，采用钴60-γ辐射法聚合工艺，利用丙烯酸酯单体、双丙酮丙烯酰胺合成出含活性酮羰基的丙烯酸酯乳液；然后同含端酰肼基聚氨酯乳液按一定的比例混合，制备出酮肼交联型丙烯酸酯聚氨酯复合乳液。

The advances in asymmetric reduction of prochiral ketones to chiral alcohol s with biocatalysis are reviewed.

综述了国内外利用生物催化羰基的不对称还原合成手性醇的研究情况。

Addition to carbonyls is one of the most important reactions in organic chemistry.

对羰基的加成作用是有机化学中最重要的反应之一。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。