二甘醇

But it was really diethylene glycol, a low-cost substitute commonly used in automobile antifreeze.

但实际上是二甘醇，一种低成本的常用的汽车防冻剂。

But it was really, a low-cost substitute commonly used in automobile antifreeze .

但实际上是二甘醇，一种通常用于汽车防冻剂的低成本代用品。

It was found in the cough syrup and other medicines blamed for last year's deaths in Panama.

去年在巴拿马，一批来自中国的咳嗽药水中含有二甘醇导致至少50人死亡。

The synthesis of 1,4 dioxane from diethylene glycol using p toluene sulphonic acid as a catalyst was discussed.

利用二甘醇为原料，以对甲苯磺酸为催化剂合成了 1 ，4 -二氧六环。

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。

Ling Sheng, Guangzhou Chemical Trading Co., Ltd. is a franchise-n-butyl, octyl ester, diethylene glycol, butyl acetate, such as plasticizers, solvents products trading company.

广州市凌升化工贸易有限公司是一家以专营二丁酯、二辛酯、二甘醇、醋酸丁酯等增塑剂、溶剂产品的生产贸易公司。

A novel preparation method to synthesize DEDB by using aluminium phosphotungstate catalyst was developed.

蒋维开发了一种用磷钨酸铝催化合成二甘醇二苯甲酸酯的新方法。

A novel ligand, N, N'-bis (2-hydroxy-1-naphthylidene)-3-oxa-1, 5-diaminopentane , and its Zn , Ni , Co , Cu complex were synthesized. The compositions and structures of the ligand and its complexes were characterized by elemental analyses, MS , IR spectra, DTA-TG and molar conductivity.

合成了含萘酚环Schiff碱开链冠醚配体H〓L〓（N，N'-双-二甘醇二胺）及其过渡金属(Zn、Ni、Co、Cu)配合物，通过元素分析、质谱、红外光谱、摩尔电导对配体及配合物的组成、结构进行了详细的表征，对配体和配合物的溶液和固体荧光性质进行了研究。

To the clear solution of the Grignard reagent, 1.5mol equivalent ofMe(OCH_2CH_2)_2OMe as tetrahydrofuran solution was added drowise at about 0—10℃ during 30 min.,and the mixture was stirred for 3h.

在制备烷基镁的过程中即使加入1.5摩尔当量的二甘醇二甲醚，烷基镁的收率只有88％，这是今后要继续研究的重要方向。

To the clear solution of the Grignard reagent,1.5mol equivalent of Me(OCH2CH2)2OMe as tetrahydrofuran solution was added drowise at about 0--10℃ during 30 min.,and the mixture was stirred for 3h.

在制备烷基镁的过程中即使加入1.5摩尔当量的二甘醇二甲醚，烷基镁的收率只有88％，这是今后要继续研究的重要方向。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。