查询词典 esters

Methyl esters were produced by transesterification of cottonseed oil with methanol in the presence of solid bases as heterogeneous catalyst.

生物柴油可以由棉籽油与甲醇在碱催化剂的作用下通过酯交换反应制得。

The present business card printing and membership card making business in the widely-used or traditional solvent-based inks, solvent-based inks from paints, solvents, binders, fillers and adjuvant, solvent used mainly aromatic hydrocarbons, esters, ethers, flavoniod etc, these toxic solvent, it finds that, in the packaging of food, medicines, and cosmetics, and so on; and a volatile, with a stronger hen'egg cretonne, will pollute the environment and the health of workers; solventing and imflammable, there is the production of a security risk.

目前制卡和会员卡制作行业中广泛使用的还是传统的溶剂型油墨，溶剂型油墨由颜料、连结料、溶剂、填充剂和辅助剂组成，所用的溶剂主要是芳香烃类、酯类、酮类、醚类等有机溶剂，这些溶剂大都具有毒性，会污染所包装的食品、药物和化妆品等物品；且具有挥发性，有较浓的刺激性气味，会污染环境并影响工人的身体健康；有机溶剂易燃易爆，存在着生产安全隐患。

And they have been used in composites, adhesives, and electrics. However, like most other thermosets, they have suffered the drawback of brittleness. At the same time, reports on cyanate esters are all focused on bisphenol A dicyanate ester.

但像其它的热固性树脂一样，氰酸酯树脂普遍存在脆的弱点，限制了其应用，同时，目前关于这类性能优异的树脂基体的研究都集中在双酚A型氰酸酯树脂上。

of determination of cyclohexanone oxime concentration in esters gained in liquid phase Beckmann rearrangement is set up in the paper, which is a basis of the above reaction kinetics.

本文建立了己内酰胺液相重排反应转位酯中环己酮肟含量的测定方法，为环己酮肟液相重排反应动力学的研究奠定了基础。

Because the properties of the products(such as fatty acids,fatty acid methyl esters,monoglyceride and diglyceride ,et al)are similar,usually many pieces of thin layer chromatographyplates are needed to obtain pure triglyceride for the 2-position fatty acid analysis.

由于反应生成物(如脂肪酸、脂肪酸甲酯、甘三酯、甘一酯、甘二酯等)的性质十分相似，要研究酯交换过程中甘三酯的Sn - 2位脂肪酸组成，所需要甘三酯的量往往需要很多块TLC板的分离才能实现，致使实验费用增加，效率降低。

A crude lipase, Newlase F, was used to remove C-terminal protecting groups from dipeptide esters.

讨论了工业用混合酶Newlase F在脱多肽C端保护基中的应用。

Results: The ultrasound extraction used ethyl ether superior to other methods of 5,identified 36 elements,containing the main esters,carbon-and second-category,at least acetylene category.

结果：乙醚超声萃取的前处理方法明显优于其他5种方法，鉴定出36种成分，主要为酯类，碳烯及烷类次之。

Any of several esters, other than the ethyl ester, of carbamic acid .

一种苦味油质的丁酸甘油三酸酯，丁酸甘油酯的一种形式。

Any of several esters, other than the ethyl ester, of carbamic acid.

天然形成的油酸甘油酯，见于脂肪和油脂中。

Held Tianjin ethylene, Shandong Lunan fertilizer plant researchers pressurized gasification and Phase II expansion project, Beijing Dongfang chemical acrylic acid and esters, Jinxi Chemical Plant ethylene propane series, 40 engineering and engineering technology to national, provincial and municipal incentives to the industry.

先后有天津乙烯、山东鲁南化肥厂水煤浆加压气化及二期扩建工程、北京东方化工厂丙烯酸及酯、锦西化工总厂环氧丙烷系列工程等40多项工程和技术获得国家、行业和省市级奖励。

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。