查询词典 methyl-glyoxal

Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.

以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。

The biological activity tests show that some target compounds have a good activity as plant growth regulator, and N-5-(3-carboxy-1H-1,2,4-triazolyl)-N'-o- chlorophenylfonnyl urea, N-5-(3-carboxy-1H-1,2,4-triazolyl)-N'-o- bromophenylformyl urea, N-5-(3-carboxy-1H-1,2,4-triazolyl)-N'-p- methyl-phenyl formyl urea have excellent activity of auxin.

生测试验证明部分酰基脲类化合物具有良好的植物生长调节活性，其中N-5（3-羧基-1，2，4-三唑基）-N'-o-氯苯甲酰基脲、N-5-（3-羧基-1，2，4-三唑基）-N'-o-溴苯甲酰基脲和N-5-3-羧基-1， 2，4-三唑基）-N'-p(或m-甲基苯甲酰基脲具有优良的生长素活性。

In the presence of NaH and in DMF, the acyclic crown ethers 1a and 1b were synthesized by the reaction of di-or triethyleneglycol ditosylate and o-methoxymethoxybenzyl alcohol, which was obtained from salicylaldehyde via the protection of the hydroxyl group with chloromethyl methyl ether followed by the reduction of the formyl group with NaBH4. The hydrolysis of 1a and 1b with dilute hydrochloric acid provided the diphenolic type acyclic crown ethers 2a and 2b respectively in good yield.

将水杨醛与碱和氯甲基甲基醚反应，再经过NaBH4还原，即制得邻苯甲醇，然后将其在DMF中与NaH和二甘醇二对甲苯磺酸酯反应，得开链冠醚1a和1b.1a和1b经稀酸水解，即脱保护而分别生成新的酚型开链冠醚2a和2b。

The major components in extracts of larval frass and egg masses of O.furnacalis were fatty acids.In contrast,the major chemicals in extract from larval frass of O.nubilalis were a blend of FAs and fatty acid methyl esters,and those from egg masses of O.nubilalis were FAMEs.

取食人工饲料后，亚洲玉米螟幼虫粪便和卵块提取液中的主要成分为脂肪酸；欧洲玉米螟幼虫粪便提取液中主要成分为脂肪酸和脂肪酸甲酯的混合物，卵块提取液中主要成分为脂肪酸甲酯。

Aim To investigate the relationship between the changes of N-methyl-D-aspartate receptor activity on cerebral cortex and brain edema after brain injury in the rats.Methods The brain injury model was made by a free-falling body.

目的 脑损伤后释放的谷氨酸通过其受体，主要是N-甲基-D-天门冬氨酸受体而发挥神经元兴奋毒作用；通过对脑损伤后不同时期伤侧大脑皮质NMDA受体活性和含水量的测定，探讨它们之间的关系。

Di-methyl fumarate is an effective preservative containing such group, but it is banned to used in food because of its skin allergy.

反丁烯二酸二甲酯即为一种含有该功能团的广谱、高效、低毒的防腐剂，但由于其致皮肤过敏性在食品工业中得不到广泛的应用。

Methyl bromide is the most commonly used fumigant in quarantine treatment.

溴甲烷是检疫处理上最常用的一种薰蒸剂。

Wood packing materials fumigated with methyl bromide should be accompanied with an official certificate attesting to the treatment.

用溴甲烷熏蒸处理过的木质包装应附有官方证书证明进行了这种处理。

Wood packing materials fumigated with methyl bromide should be accompanied with an official certificate attest ing to the treatment.

用溴甲烷熏蒸处理过的木质包装应附有官方证书证明进行了这种处理。

The goods must be packed to provide airspace for circulation of the methyl bromide below, above and along the sides of goods being fumigated.

货物必须包装和堆放好，提供一定的空间，以使溴甲烷能在货物的底部、顶部和边缘来回循环。

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？