酯

Applications of gas chromatography in the research of biodiesel processing are reviewed with 27 references,including the analysis of fatty acid methyl esters in the reaction products and final biodiesel,the determination of mono-, di-and tri- glycerides ,the contents and distribution of free fatty acids,and the determination of trace methanol in biodiesel.

综述了气相色谱法在生物柴油生产工艺研究中的应用，包括反应产物和生物柴油产品中脂肪酸甲酯含量和分布的测定，单脂肪酸甘油酯、二脂肪酸甘油酯和三脂肪酸甘油酯含量的测定，游离脂肪酸含量的测定以及微量甲醇含量的测定等。

METHOD Ethyl esters of EPA and DHA could form a homogeneous solution with glycerol by a certain of homogeneous agent such as oleic acid potassium salt,and changed into glycerides of EPA and DHA by transesterification at reaction temperature.

用一定量的均相化试剂如油酸钾能使互不相溶的甘油和EPA乙酯、DHA乙酯形成均相反应溶液，并在120℃就开始发生酯交换反应。

The advantages of catalytic synthesis of oxalate ester in gaseous phase by carbon monoxide are summarized. The five important characterization of our patent technology invented for the use of industrial raw material and the potential good economic value of the process are presented. It indicates that study and development of catalytic synthesis of oxalate ester .oxalic acid as well as glycols by natural gas in gaseous phase have a great advantage for full utilization of natural gas....

概述了&CO气相催化合成草酸酯&技术的先进性，介绍用工业性原料为主要内容的专利技术：&气相催化合成草酸酯连续工艺&的五个主要特点及其潜在的经济效益，并指出，用天然气经合成气进行气相催化合成草酸酯和草酸、乙二醇的研究与开发，可使天然气得到充分的利用，具有很好的经济效益，是天然气化工综合利用的一条有效途经，也是当代C1化学的重要发展方向。

Class-specific polyclonal antibodies for O,O-diethyl phosphorothioate pesticides had been generated. A series of generic haptens were synthesized and coupled to bovine serum albumin and ovalbumin for immunogens and coating antigens, respectively. New Zealand rabbits were immunized with immunogens to obtain corresponding polyclonal antibodies.

通过分析硫代磷酸二乙酯类农药的结构特点，设计并合成了系列半抗原；采用活泼酯法将半抗原分别与牛血清蛋白和卵清蛋白偶联制备了系列免疫原和包被原；通过免疫新西兰大白兔获得了相应抗硫代磷酸二乙酯类农药的类特异性抗体。

The effect of the interior-molecular structure,reflected by the iodine value,the total content of mono-glyceride and di-glyceride,at different level on the quality of low-fat ice cream was studied.

研究了分子蒸馏单甘酯的碘值、总单酯含量、总双酯含量等反映的内部分子结构对低脂冰淇淋质构的影响。

By using polymerizable surfactants, the stability of the latex and water resistance of the film can be improved. Sodium monoalkyl maleates polymerizable surfactants, sodium monoalkylpolyoxyethylene maleates polymerizable surfactants and N-methyl-N-monododecylfumaroyl taurine polymerizable surfactants are synthesized, by using normal fatty alcohols, alkyl poly ether and maleic anhydride.

以直链脂肪醇、脂肪醇聚氧乙烯醚和马来酸酐为起始原料，设计合成了马来酸单脂肪醇酯钠盐A系列、马来酸单脂肪醇聚氧乙烯醚酯钠盐B系列、N-甲基-N-脂肪醇单酯富马酰基-牛磺酸钠D系列的可聚合乳化剂。

The thermal stabilities of dithioesters, trithiocarbonates and xanthates were also compared,indicating that trithiocarbonates and xanthates are more stabile than dithioesters,while the chain transfer abilities of the latter are usually better than that of the former.So how to balance the chain transfer ability and the thermal stability of RAFT agents is a big challenge.

另外我们比较了双硫酯、三硫酯和磺原酸酯的热稳定性，发现后两者的热稳定性要远远好于前者，但前者的链转移能力一般要大于后两者，所以如何平衡链转移剂的链转移能力和其热稳定性之间的矛盾仍然是个很大的挑战。

The invention relates to a surface chemistry modified latex which can be obtained by carrying out radical polymerization in emulsion in the presence of at least one ethylenically unsaturated monomer or at least one polymer having ethylinically unsaturated residual bonds, at least one radical polymerization, at least one single, double or triple block polymer which is soluble or dispersible in water, comprising an active group at the end thereof, capable of forming a radical, and chosen from dithioesters, xanthates, thioether-thiones and dithiocarbamates.

本发明涉及具有改良表面化学性质的胶乳，它可以通过在以下物质的存在下进行自由基乳液聚合来获得：至少一种烯属不饱和单体或至少一种含残留烯属不饱和键的聚合物，至少一种自由基聚合引发剂，至少一种水溶性和/或水可分散的单嵌段、二嵌段或三嵌段聚合物，在其端部包括选自二硫酯，硫醚-硫酮，二硫代氨基甲酸酯和黄原酸酯中的能够形成自由基的活性基团。

Under the conditions of 24 h fumigation with 30 μL/L dosage at 19 °C, 25 °C and 31 °C, the adult corrected mortalities were 83.108%, 62% and 42%, respectively. These results indicated that the EtF killed the adult weevils in a very short time period, and the fumigation efficacy at relatively lower temperature was better than that at relatively higher temperature. Under the conditions of 20, 25 and 30 °C and 24 h fumigation

1.2 甲酸乙酯对赤拟谷盗的熏蒸活性同样采用广口瓶密闭熏蒸法，在不同的药剂浓度、处理时间和温度下系统研究甲酸乙酯对赤拟谷盗T.castaneum卵、低龄幼虫、高龄幼虫、蛹以及成虫的熏蒸致死作用，结果表明处理时间和温度显著影响甲酸乙酯对赤拟谷盗各虫态的熏蒸致死效果，48h内就能发

Compared the activities of 5 sorts of lipases from different source in synthesis of fatty acid esters and hydrolysis of olive oil, 3 sorts of lipases are better. Compared the stability and the activities of 3 sorts of Upases in different media, organic solvents and CAL lipase are best.

通过对不同来源的5种脂肪酶分解橄榄油和合成脂肪酸酯的比较，选出了合成脂肪酸酯活力较高的3种脂肪酶，通过比较不同介质中这3种脂肪酶的合成活力后，得出这三种酶在有机相中活力最高，从操作稳定性角度出发，选出催化酯合成效果最好的脂肪酶CAL。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。