查询词典 methyl-glyoxal

Whenpyridine was used as reductive decomposing agent, the expecting cholest-4-en-3,6-dione-22-al was obtained. However, when Zn/HOAc was used to decomposethe ozonide, C-4,5 double bond was further reduced to give cholest-3,6-dione-22-al as main product. 2 For the side-chain construction of compound (1), the solid-liquid phase-transfer Wittig reaction was used. When (3-methyl-2-oxobutyl)-triphenylarsonium bromide was used as reagent, the reaction can be carried out inmild reaction condition and the yield is higher than that when phosphorane wasused.

但使用Zn／HOAc作为分解剂时，却得到其氢化产物胆甾-3， 6-二酮-22-醛；2在甾体支链引入过程中，采用固-液相转移Wittig反应的方法，用(3-甲基)-2-氧丁基三苯基溴化胂作为试剂，反应在非常温和的条件下便可完成，而且产率比传统采用膦烷的方法更高；3在对某些甾酮化合物的选择性还原反应研究时，发现在〓还原体系中，当加入某些金属离子后，反应有更好的区域选择性和立体选择性。

With methyl palmitate separated from Chinese vegetable tallow and VC as raw materials, AP was synthsied in this study.

L-抗坏血酸棕榈酸酯是具有功能性、营养性、无毒、高效的抗氧化剂，应用范围广泛。

Objective To investigate the effect and possible mechanisms of methyl parathion on testis cell cycle and cell apoptosis in male rats.

目的 研究甲基对硫磷对雄性大鼠的睾丸毒性作用，探讨其毒理作用机制。

The residues of methyl parathion had not been detected in seven days when it was used.

实验结果表明，甲基对硫磷在小白菜上半衰期为2.91天；喷药后第七天，在小白菜中未检出甲基对硫磷的残留。

A method was developed for simultaneous determination of methyl- parathion and parathion residues in vegetables by reversed-phase high performance liquid chromatography.

建立了同时测定甲基对硫磷、对硫磷在蔬菜中残留量的反相高效液相色谱分析方法。

The results showed that the half of decay time of methyl parathion in Chinese cabbage was 2.91 days.

喷药后，在第零天、第一天、第二天、第三天、第五天、第七天分别取样，用气相色谱法分析测定甲基对硫磷在小白菜上的残留量，得出甲基对硫磷残留量与时间的关系。

The conclusion can be drawn that Chinese cabbage applied methyl parathion can not be consumed in seven days.

建议小白莱施用甲基对硫磷后，至少在第七天后再采摘食用。

After 4 generations treatment with tannic acid, the larvae of cotton bollworms were more susceptible to deltamethrin, but had no significant difference in susceptibility to parathion methyl.

单宁酸处理的第4代幼虫对溴氰菊酯的敏感度有增加的趋势，对甲基对硫磷的敏感度没有明显改变。

The optimum pH value for enzymatic hydrolysis of methyl parathion was 8. 6～8. 8, the optimum temperature was 15℃.

甲基对硫磷水解酶水解甲基对硫磷的最适pH均为8.6～8.8，最佳反应温度为15℃。

Methyle β cyclodextrin was simply synthesized, and the impacts on the solubilization of methyl parathion and carbofuran were investigated.

摘 要：研究了甲基化β环糊精的一种简单制备方法及其对甲基对硫磷和呋喃丹的增溶作用。

My first article for Screen Power Magazine, which is to this day is the official magazine of Jackie Chan, was a DVD review of the Hong Kong actioner Gen-X Cops, starring Nicholas Tse and Daniel Wu.

我的第一篇文章为屏幕力量杂志，在对这天是Jackie Chan 正式杂志，是香港actioner Gen X 警察的DVD 回顾，担任主角Nicholas Tse 和丹尼尔吴。

His lips grazed hirs, Now what are you going to do?

他的唇使吃草了 hirs，现在你将要做什麼？