查询词典 esters

So resesrch on the synthesis of amino acids esters is of great significance both in theoretical and in practical side.

研究开发工艺可靠、成本合理的氨基酸酯制备技术具有重要的理论和实际意义。

They are a complex blend of tropical fatty acids and esters in which the ingredients are based on natural and renewable resources.

它们是复杂混合后的典型脂肪酸和脂，其成分是基于天然的、可再生的能源。

Part of the explanation for this is that seed tannins have added chemical structures known as galloyl esters.

这一点的部分解释是葡萄籽单宁多出一个叫做没食子酸酯的化学结构。

So research on the synthesis of amino acids esters and their derivatives are of great significance both in theoretical and in practical side.

研究开发工艺可靠、成本合理的氨基酸酯及其衍生物制备技术具有重要的理论和实际意义。

The critical parameters of 80 esters and ethers have been systematically collected and evaluated,and 189 values are recommended.

系统地搜集并评定了80个酯和醚类化合物的临界参数，给出了189个推荐值，按其可靠性、一致性和测定年代给出其质量码。

After the research of the past decade and more, it was found that alcohols, ethers and esters are of the potential clean alternative fuels.

随着全球石油资源的不断减少，寻找新的石油替代燃料，特别是清洁燃料，成了各个国家当前迫切需要解决的重大问题。

The results showed that 1 There are 33 kinds of pyrolysates at 300℃. 42 kinds at 421℃, 50 kinds at 500℃, 49 kinds at 600℃ and 23 kinds at 800℃ 2 Under different conditions, the pyrolysates from the extraction of Honeysuckle are aldehycies. ketones, esters and furans. Most of the pyrolysates are the important components in cigarette smoke. It offers a possibility of the quality control on the extraction of Honeysuckle by using its fingerprint.

结果表明：①金银花提取物在这一系列裂解温度下检测到的挥发性热裂解产物分别为33种、41种、50种、49种、23种；②金银花提取物裂解后产生大量醛类、酮类、酯类和呋喃类物质，这些物质是构成卷烟香味的重要物质，能改善卷烟吸味、减轻刺激性。

Totally, 147 flavor compounds, which comprised of 17 acids, 12 alcohols, 16 aldehydes, 36 esters, 12 furans, 13 ketones, 14 miscellaneous compounds, 8 phenols, 6 pyrans, 4 pyrazines, 3 pyrroles, 6 sulfur-containing compounds, were identified.

共鉴定出147种风味化合物，其中酸类17种、醇类12种、醛类16种、酯类36种、呋喃12种、酮类13种、杂环化合物14种、酚类8种、吡喃6种、吡嗪类4种、吡咯3种、含硫化合物6种。

Amino acids esters and their derivatives, of which the synthesis has rapidly become a new research field in recent years, have been extensively used as medical semi-product, food additives, cosmetic additives, mineral flotation additives, germicides, etc.

氨基酸酯及其衍生物的合成是近年来迅速发展起来的一个新研究领域，它们在医药、化工、食品、农业等方面有着越来越广泛的应用，可用作药物中间体、食品添加剂、化妆品添加剂、矿物浮选剂和杀菌灭虫合剂等，应用前景十分广阔。

Amino acids esters, of which the synthesis has rapidly become a new research field in recent years,have been extensively used as medical semi-product,food additives, cosmetic additives, mineral flotation assitives,germicides,etc.

氨基酸酯的合成是近年来迅速发展起来的一个新研究领域，它在医药、化工、食品、农业等方面有着越来越广泛的应用，可用作药物中间体、食品添加剂、化妆品添加剂和杀菌灭虫合剂等，应用前景十分广阔。

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。