high-yield

This method of cultivation produces higher yield.

这种耕作方法可提量。

The fields give high and stable yields regardless of climatic circumstances.

不管气候条件如何, 这块地总保持稳。

The synthesis of ethyl vanillin from urotropin is a major method with high yields,simple process, and available raw materials.

乌洛托品法合成已基香兰素一种重要方法，它操作简单，原料易得，率较。

Phenoxyacetophenone could be prepared from potassium phenolate and m bromoacetophenone via Ullmann reaction catalyzed by copper acetate in high yields.

间苯氧基苯乙酮可由酚钾与间溴苯乙酮在醋酸铜催化下率合成。

The stable organic solution of dichloroglyoxime was prepared in high yield by chlorine aerated into the ethylene glycol solution of glyoxime.

将乙二肟溶于乙二醇,通入氯气,生成稳定二氯乙二肟溶液,这种方法制备二氯乙二肟贮存稳定,率。

The invention is applied to the catalytic reactions such as aromatic ketone unsymmetrical hydrogen transfer reaction and can achieve very high yield and enantiotropic selectivity.

此发明应用于芳香酮不对称氢转移反应等催化反应中，可得到很率和对映选择性。

P-Brom-ethylphene was prepared by brom-phene by means of Friedel-Crafts and Huang Ming-long reactions. The synthesis can be industrialized because of good quality, high yield and low cost.

对溴乙苯溴苯为原料,经付克乙酰化,黄鸣龙还原等反应合成,其质量和收率较,成本较低,具有工业化意义。

This method not only lowcrs the temperature of labelling ortho-iodo-hippuric acid, speeds up the reaction and gives high yield, but aslo suits the requirement of large scale production.

早期,邻-碘马尿酸标记大多采用水溶液体系,热熔融体系,热液熔融体系交换法来制备。