查询词典 butanolide

Based on minor structural difference in the C-2 side chain, these autoregulators chemically identified to date can be classified into three types: the A-factor type, the virginiae butanolide type and the IM-2 type.

根据该类自动调控因子C-2位细微的结构差别分为三种类型，分别为A因子型、VB型和IM-2型。

Based on minor structural difference in the C-2 side chain, these autoregulators chemically identified to date can be classified into three types: the A-factor type, the virginiae butanolide type and the IM-2 type.

γ-丁酸内酯自动调控因子是一种由链霉菌产生的被称为微生物&激素&的小分子化合物，它控制着链霉菌次级代谢物的产生或形态分化。

In order to study strcture-bioactivity relationship concerning α,β-unsaturated-γ-lactones, we further synthesized γ-benzyloxymethy-γ-butanolide XXIII and the corresponding unsaturated buteno- lido XXV Scheme 6, p.

为了研究该类化合物的构效关系，在本论文第三部分，我们进一步设计并合成了--γ-苄氧基甲基-γ-丁内酯XXIII和--γ-苄氧基甲基-γ-丁烯内酯XXV这两个内酯化合物，目的是想考察内酯的α，β-不饱和双键是否是产生细胞毒性的关键结构。

Preliminary bioassay: Compounds I, VI, VII, XXIII and XIVshowmoderate cytotoxicities against Ehrlich tumor cells (〓 30-40μ g/ml), while compound 1 exhibites stronger activity (〓 10.5μ g/ml). Saturated butanolide was almost inactive.

化合物Ⅰ、Ⅵ、Ⅶ、ⅪⅤ和XXⅢ的初步生理活性试验表明，它们均对艾氏腹水瘤细胞表现有中等的细胞毒性，其〓大多在30～45微克／毫升之间，含有双键的不饱和内酯Ⅰ和XIV有较好的活性，其中尤以Ⅰ的活性最强，〓为10.5微克／毫升。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。