酯

However, it is still a sticking point for separating urethane from urea in isocyanate-wood reacted resultant.

然而对于多异氰酸酯与木材的反应产物生成氨基甲酸酯和取代脲的分离及定量一直是该领域的研究难点。

This paper describes the studies on consistency of directed interesterified oil in medium scale production test for producing margarine and shortening by directed interesterification method with lard and rapeseed oil, palm oil and rapeseed oil, chinese vegetable tallow and rapeseed oil, as well as lard itself.

本文对猪油与菜油、棕榈油与菜油、乌桕油与菜油以及猪油为原料的定向酯交换法生产人造奶油、起酥油中间试验产品，交酯油的稠度进行了研究。作者按照IUPAC中熔化膨胀法，测定了55个试样的熔化膨胀度；然后把必要的值换算成SFC，并做出了SFC曲线。

For the veneering with 0.3mm thick veneer over a graduated particleboard, the optimum processing conditions were a UF adhesive level at 78g/m~2 over the board, a PVAC adhesive level at 42g/m~2 over the veneers and 4.6 percent 36％ HCL ...

用0.3mm厚的水曲柳薄木对渐变结构刨花板饰面时，其最佳工艺条件为：脲醛树脂胶在刨花板上的涂胶量为78g/m~2，聚醋酸乙烯酯乳液在薄木上的涂胶量为42g/m~2，38％盐酸用量为聚醋酸乙烯酯乳液重量的4.6％。

Measuring viremia is very important when you use Adefovir because Adefovir is not a very potent drug.

应用阿德福韦酯时，定量病毒水平是很重要的，因为阿德福韦酯不是一种强效的药物。

The reduce of esters,the increase of acids,and the imbalance of the ratio of esters and acids are the main reasons for washy liquor taste and unpleasant liquor flavor after a period of storage.

酯类物质减少，酸类物质增加，酸酯比例失衡，是低度白酒贮存后口味淡薄、出现不愉快气味的主要原因。

Effects of catalyst dosage, kind of water carrier, ratio of raw material and reaction time were investigated.

以乙酸、甘油为原料，通过酯化反应合成乙酸甘油酯。

The results showed that the optimal conditions for synthesis of benzyl acetate were: the molar ratio of acetic acid to benzyl alcohol was 2∶1,the amount of the water carrier was...

在此条件下，酯化率为76%，酯含量为91%。Al2O3/SO42-催化剂的合成方法简单，催化活性高，可重复使用多次。

To establish the method of gas chromatography mass spectrometry and selected ion monitoring for the determination of organophosphorus, pyrethroid, organochlorine, carbamate and weedicide pesticide residues in foods.

目的 建立一种测定食品中有机磷、拟除虫菊酯、有机氯、氨基甲酸酯类和除草剂农药残留的气相色谱质谱方法。

Methods The pesticides were extracted with acetone and dichloromethane, warmed with water at 40℃,and circumrotated and evaporated until it was nearly dry, then it was purified by Envi Carb column and Sep Pak NH2 column. Afterwards, gas chromatography mass spectrometry and selected ion monitoring were used to determine 42 pesticide residues, such as organo-phosphorus, pyrethroid, organochlorine, carbamate and weedicide.

该法采用丙酮、二氯甲烷提取，40℃水浴旋转蒸发近干，以Envi-Carb柱和Sep-Pak-NH2柱净化，以气相色谱－质谱选择离子监测方式分析检测有机磷、有机氯、拟除虫菊酯、氨基甲酸酯和除草剂等42种农药残留。

" Salicylic acid: White, crystalline solid organic compound used chiefly to make aspirin and other pharmaceutical products, including methyl salicylate (oil of wintergreen, for medicines and flavourings), phenyl salicylate (for sunburn cream s and pill coatings), and salicylanilide."

水杨酸：白色晶体有机化合物，主要用来制取阿司匹林和其它药品，包括水杨酸甲基酯(冬绿的油，用于医药和调味用香料)、水杨酸苯酯(用于防晒药膏和糖衣药片)以及游离水杨酸(用于一种伤皮肤的杀真菌剂)。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。