查询词典 esters

Green coffee beans contain up to 10% of chlorogenic acids, i.e.,various isomers of hydroxy-cinnamoyl esters of quinic acid.

咖啡生豆含有最高可达10%的绿原酸，即，奎宁酸的不同种的羟基酯异构体。

The microwave assisted synthesis of aromatic esters has advantages such as less time, efficiency and safety while the traditional process has the disadvantages such as long rection time, low yield, serious pollution and difficult separation.

传统加热条件下合成芳香酯具有反应时间长、产率低、污染大及后处理困难等缺点。微波辅助合成芳香酯具有反应快速、高效及安全等优点。该文综述了微波辅助合成芳香酯的研究进展，并展望了微波技术在芳香酯合成中的发展前景。

The microwave assisted synthesis of aromatic esters has advantages such as less time, efficiency and safety while the traditional process has the disadvantages such as long rection time, low yield, serious pollution and difficult separation.

传统加热条件下合成芳香酯具有反应时间长、产率低、污染大及后处理困难等缺点。微波辅助合成芳香酯具有反应快速、高效及安全等优点。

Most commonly esters are not synthesized by the reactions between carboxylic acids and alcohols because such reactions are revisable reactions with low yields.

P115 酯通常不由羧酸和醇的反应来制备，这是由于这个反应是可逆反应、产率低。

These compounds include hydrocarbons, alcohols, ketons, aldehydes, esters and ringy compounds. The major volatile compounds are alcohols, aldehydes and ketons, respectively with the contents of

这些成分包括烃类、醇类、酮类、醛类、酯类和环状化合物，其中含量较高的是醇类、醛类、酮类，在腹部肉和背部肉中分别地占挥发性化合物总数的30.47%、38.47%、13.14%和27.87%、41.54%、14.43%。

Currently, with its mature condition and complete infrastructure, more than 10 enterprises have entered the town, including China Science Research Institute Guangzhou Chemical Research Institute. A newly-risen industry products group has been formed, including vinyl esters, dimethyl ester, saleratus, degradable polyurethane foam etc.

目前开发利用条件成熟、设施完备，中科院广州化学研究所及10多家生产企业在镇内落户，已初步形成碳酸乙烯酯、丙烯酯、二甲酯以及小苏打、脂肪族聚碳酸亚乙酯、降解型聚氨酯泡沫塑料等新兴产业产品群。

To achieve this, further fundamental studies on the optical resolutions of the selected target carboxylic acids and neutral amino acids have been carried out in organic solvents respectively with acidic, basic, and esters of tartaric acid resolving agents, along with the racemization of the neutral amino acids catalyzed by salicylaldehyde.

为此，分别选择代表性的有机酸和中性氨基酸在有机溶剂中与酸性、碱性和酯类拆分剂分别进行光学拆分的深入研究，同时研究了水杨醛催化下L-型中性氨基酸的销旋催化研究。

In this paper,studying find that using sandless kaolin and tallow esters as filler and adjuvant can improve dimetachlone's total suspension s.

通过对菌核净的助剂与填料的研究发现，采用含沙量较少的高岭土及脂肪酸酯类表面活性剂可提高菌核净的总悬浮率。

The tribological characteristics of the esterified Castor oil is better than those of Castor oil, Di-iso-butyl sebacate, Pentaerythritol esters , mineral oil 150#, bean oil, Rapeseed oil. As part of 12-hydroxyl of Castor oil acid has transformed into ester so that the isomerization degree of esterified castor oil increases with the branching carbon chain extending.

四球机测定酯化蓖麻油的摩擦性能优良；优于蓖麻油、癸二酸二异辛酯、季戊四醇酯、矿物油VG150〓、豆油和菜籽油；酯化蓖麻油的流变性能改进的机理认为是部分12-OH酯化后，直链的植物油结构异构化。

Yellow serofluid, brown yellow in color and colloid turbid state in appearance, contained sugars, ethanol, solids, and especially rich alcohol, aldehyde, acids, esters and beneficial microbes. It could be used as precursory substance for the improvement of liquor quality and liquor taste and the synthesis of flavoring substances.

黄浆水为棕黄色、胶体混浊态，含有糖分、酒精、固形物，特别是含有大量的醇、醛、酸、酯及有益微生物菌体，是可用来提高曲酒质量、改善风味、合成香味物质的前驱物质。

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。