查询词典 acetic aldehyde

The catalytic esterification of acetic anhydride and nine phenols were investigated in the presence of complex resin catalyst at 20 ℃,and its mechanismes were discussed.

研究了 2 0℃时，醋酸酐与九种酚在复合树脂催化剂下的催化酯化反应，并探索了其反应的机理。

The synthesis of terpinyl acetate with terpineol and acetic anhydride as reactants and cerium sulfate as catalyst was studied.

研究了以Ce(SO4)2.4H2O为催化剂，松油醇和乙酸酐为原料合成乙酸松油酯。

From the synthesis of morphine and acetic anhydride derivatives of heroin history, so far, heroin still known as the "King of Drugs."

从吗啡与乙酐合成其衍生物海洛因的历史，到目前为止，海洛因仍被号称"毒品之王"。

Under the optimized conditions, the efficiency of acetic anhydride labeling for the tryptic peptides was up to 100%.

结果表明：在10倍和30倍动态范围内，线性关系良好（r=0.99，r=0.98），理论值和观测值的偏差分别为0.5％和20％。

Sucrose reacted with acetic anhydride for 6h at -25℃.

在-25℃下，蔗糖与乙酸酐（摩尔比为0.95）反应6h即可。

FeCl_3 was used to catalyse the acylation reaction of triisobutylene by acetic anhydride at room temperature.

室温下FeCl3用于催化三聚异丁烯与乙酸酐的酰化反应。

It was found that SnCl_2·2H_2O is an effective catalyst for the acylation of 2,3-dimethyl-2-butene by acetic anhydride at room temperature.

发现SnCl2·2H2O是室温下2，3-二甲基-2-丁烯与乙酐进行酰化反应的有效催化剂。

Sulfur method replaced by acetic anhydride method for chloroacetic production is the trends in domestic.

指出在国内用醋酐法代替硫磺法生产氯乙酸的必然趋势。

The synthesis of sucrose octaacetate from sucrose with acetic anhydride in the presence of anhydrous sodium acetate is reported.

报道了在无水乙酸钠存在下，蔗糖和乙酸酐反应合成蔗糖八乙酸酯。

Main Products polyformaldehyde, ethylene dichloride, dichloroethane, acetic anhydride, etc. in the industry has a good reputation.

主营产品多聚甲醛、二氯乙烯、二氯乙烷、醋酸酐等在业界具有较好的声誉。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48