查询词典 esters

Fine chemicals to add auxiliary Series: lubricating oil pour point depressant, calcium zinc magnesium methacrylate, methyl acrylic acid lauryl ester, tetradecane methacrylate ester, methacrylic acid octadecyl ester, a acid ethylene glycol, diethylene glycol methacrylic acid ester, glycidyl methacrylate, the second reduction of three ethylene glycol dimethyl acrylate, acrylic acid lauryl ester, tetradecyl acrylate, octadecyl acrylate, acrylic acid ethylene glycol, diethylene glycol acrylate esters, glycidyl, two shrink three acrylate such as ethylene glycol.

精细化工添加助剂系列：润滑油降凝剂，甲基丙烯酸钙锌镁，甲基丙烯酸月桂酯，甲基丙烯酸十四烷酯，甲基丙烯酸十八烷基酯，甲基丙烯酸乙二醇，甲基丙烯酸二乙二醇酯，甲基丙烯酸缩水甘油酯，二缩三乙二醇二甲基丙烯酸酯，丙烯酸月桂酯，丙烯酸十四酯，丙烯酸十八酯，丙烯酸乙二醇，丙烯酸二乙二醇酯，丙烯酸缩水甘油酯，二缩三乙二醇丙烯酸酯等。

A method for producing fatty acid alkyl esters and/or glycerin comprising a step of bringing a fat or oil into contact with an alcohol in the presence of a catalyst, wherein the catalyst is at least one catalyst selected from the group consisting of the following to: a metal oxide having an ilmenite structure and/or a slyrankite structure; an oxide containing a metallic element belonging to the Group 12 and a metallic element belonging to the Group 4; a mixed oxide containing a metallic element belonging to the Group 12 and a tetravalent transition metallic element; a metal oxide containing zirconium and at least one metallic element selected from the group consisting of metallic elements belonging to the Groups 4, 5 and 8; and a metal oxide containing anatase type titanium oxide and/or rutile type titanium oxide, and the metal oxide containing a sulfur component of 700 ppm or less.

脂肪酸烷基酯和/或甘油的制造方法包括在催化剂的存在下使脂肪或油与醇接触的步骤，其中，所述催化剂是选自由下列～所组成的组中的至少一种催化剂：具有钛铁矿结构和/或斯里兰卡石结构的金属氧化物；含有属于第12族的金属元素和属于第4族的金属元素的氧化物；含有属于第12族的金属元素和四价过渡金属元素的混合氧化物；含有锆和选自由属于第4、5和8族的金属元素所组成的组中的至少一种金属元素的金属氧化物；和含有锐钛矿型氧化钛和/或金红石型氧化钛的金属氧化物，并且所述金属氧化物含有的硫成分为700ppm以下。

Any of several aromatic resins, such as balsam of Peru and Tolu balsam, that contain considerable amounts of benzoic acid, cinnamic acid, or both, or their esters.

香脂一种芳香脂类树脂，如秘鲁香脂和塔鲁香脂，含有大量的苯甲酸、肉桂酸，或同时含有这两种酸或其酸酯

Any of several esters, other than the ethyl ester, of carbamic acid .Any of a group of enzymes that catalyze transamination.

苯丙酮尿一种先天性代谢异常，其机体缺乏将苯丙氨酸代谢成酪氨酸所必需的酶。

With regard to the current society, much hubbub in the European Union ban on the use of four kinds of children's toys, plasticizers, Jiangnan University, and Dr. LG Chemical in two epoxy esters, briefed the meeting on high molecular weight plasticizers, citrate butyl ester, such as trimellitic several environment-friendly non-toxic plasticizer that can be replaced ethylhexyl phthalate, ethylhexyl adipate, whether it is synthetic process, the source of raw materials are not a problem, but there are differences in price, but into the large-scale production, the price will be decreased substantially.

关于目前社会上闹得沸沸扬扬的欧盟禁止在儿童玩具中使用四种增塑剂，江南大学和LG化学的两位博士在会上介绍了环氧酯类高相对分子质量增塑剂、柠檬酸三丁酯、偏苯三酸酯等几种无毒环保型增塑剂，认为完全可以取代邻苯二甲酸乙基己酯、己二酸乙基己酯，无论是合成工艺、原料来源都不成问题，只是在价格上还有些差异，但进人大规模生产后，价格会有较大幅度下降。

Varieties of chemical products have Dibutyl o-phenylenediamine, o-2-ethylhexyl, octyl Trimellitic, DOTP, chlorinated paraffin, epoxidized soybean oil, phthalate esters 8-10.

化工产品的品种有邻苯二丁酯，邻苯二辛酯，偏苯三辛酯，对苯二甲酸二辛酯，氯化石蜡，环氧大豆油，邻苯二甲酸8-10酯。

The fatty acid in tussore oil was saponificated and modified to methyl esters by different means .

研究了脂肪油的衍生化、三氟化硼、硫酸3种不同方法对脂肪油的皂化、甲酯化效果，并用GC/MS法对柞蚕中脂肪酸的成分进行了鉴定和分析。

The combined acids , LHZZS,XDZZS and SLZZS, one of four fractions in montan resins from montan waxes from Liaohu, Xundian and Shulan brown coal respectively, were derived by CH 2N 2 to methyl esters and their chemical constituents and structural characteristic were studied on GC-MS.

结果显示，树脂结合酸均以正构烷酸为主要成份，其分布为C1 2 ～C2 8，高含量的正构烷酸集中在低碳数一端，C2 0 含量最高，其次为C1 6 ，而舒兰结合酸中，正构烷酸占绝对优势，且C1 6 为最高含量的化合物；去氢松香酸在每一个样品中含量较低，其它三环二萜酸，如松脂酸、三达松脂酸等异构体或立体异构体含量也非常低；具有五环三萜骨架的酸性物质，在潦浒、舒兰结合酸中比较丰富，其含量超过寻甸结合酸；在低碳数一端，存在着各种支链烷酸及苯甲酸、苯酚及取代物。

A series of novel polyethylene glycol derivates was synthesized by esterification of chloroacetic acid with polyethylene glycol. Because of the good reactive activity of α-chlorin in the esters it can react with 5-fluorouracil, thus the conjugate can be obtained .

采用氯乙酸与不同分子量的聚乙二醇进行酯化反应得到氯乙酸聚乙二醇酯，由于酯中的α-氯具有良好的反应活性，将它再与抗癌药物5-氟尿嘧啶结合制备了不同分子量的高分子前药。

Objective To define the method of acclimating isolating and screening of dominant bacteria for phthalic acid esters biodegradation and study their plasmids.

目的确定高效酞酸酯降解菌的驯化与筛选方法，并对PAEs降解性基因功能片段进行初步研究。

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。