ester group

Some antioxidants with ester group can be used as linear coupled reagent , double peaks will come into being when they react to active centers , and pink will be found in their products .

含酯基的防老剂可起到两臂偶联剂的作用，与活性种反应生成双倍峰，产物带有粉红色；

In addition , the benzylic cyano group in such substrates can be replaced by an ester group , which makes the method applicable to the synthesis of N-aryl or N-alkyl-indole-3-carboxylic ester derivatives .

此外，底物中苄位的氰基还可以替换为酯基，从而使该方法还可以用来合成N-取代（芳基或烷基）-吲哚-3-羧酸酯类衍生物。

Synthesis about a kind of expanding monomer with bicyclic ortho ester group

双环原酸酯类膨胀单体的合成

For the same kind of monomers , the larger the volume of the ester group , the better the polymerization results .

同类单体中，酯基的立体阻碍作用越大，其聚合结果越好。

We present here a compilation of their preparation in function of the substituents bear by the hydroxy ester group .

在此，我们总结了用含羟基酯基团的取代基制备这些化合物及类似物的方法。

The results showed that the hydrolysis of ester group and the cyclization of 1,3-diketone were carried out in one step .

说明酯基的水解与1,3-丙二酮的闭环反应是同步完成的。

While coattail-like structures on the ester group of the molecules have an adverse effect to form cholesteryl liquid crystal phase .

而末端含有燕尾结构则对液晶态的形成产生不利影响。

Polysiloxanes ( C ) containing carboxyl were prepared by saponification of ester group in B. The IR .

最后，将B中的酯基皂化，获得含羧基的水溶性聚硅氧烷（C）。

The target molecule was synthesized through using chiral reagent , reduction of double bond , hydrogenolysis and hydrolysis of ester group .

之后，经引入手性试剂，双键还原，氢解，水解酯基得到目标产物的合成路线。

A different structure change , the effect of which has been examined , is the size of the ester group in a series of alkyl methacrylates .

已经考查过的结构变化的影响是甲基丙烯酸烷基酯系列中酯基的体积（尺寸）

The experimental result of basic dyeing showed that the hydrolysis of ester group of Blue UP-GF under basic was too severe to use for basic dyeing process .

碱性染色结果表明：BlueUP&GF在碱性条件下酯基水解严重，不适合碱性染色。

Numerical Estimation of Peak Positions for the 1050 ~ 1300cm ~ ( - 1 ) Absorption Band of an Ester Group in Infrared Spectra

IR上1050～1300cm~（-1）区域酯基吸收峰位置的预测

Sometimes , insert a phosphate ester group in can significantly change the physical and chemical properties of parent molecule , bring fundamental changes in the intermolecular forces and molecular polarity .

有时膦酸酯基团的引入能极大的改变母体分子的理化性质，使分子间作用力和分子极性发生根本性变化。

In order to investigate the effect of benzylic cyano group or carboxylic ester group in the cyclization step , other types of substrates were synthesized for comparision purpose .

另外，为了研究底物中苄位的氰基（或酯基）在环合反应中的作用，本论文设计出其它类型的底物作对比实验。

A series of novel plant activators were synthesized based on the commercial plant activator BTH by introducing alkyl chain of different lengths and various aromatic moieties to its ester group .

通过引入不同长度的柔性烷基链以及芳香羧酸，对商品化植物抗病激活剂BTH进行衍生，设计创制了系列新化合物。

The higher the temperature was and the more amount of air was , the bigger degree of oxidation of hydroxyl group and of hydrolysis and rancidity of ester group of castor oil was ;

温度越高，空气量越多，蓖麻油羟基氧化、酯基水解酸败程度越大。

After then , I analyse the product in IR , and there is the especial absorption peak of ester group , it shows the product is polyglycerol middle carbon chain fatty acid ester .

对所得产品进行红外表征，出现了酯官能团的特征峰，表明产品为中碳链脂肪酸聚甘油酯。

Reactive Disperse Dyes for Synthetic Polymer Fibres and their Natural Fibre Blends I.Reactive Disperse Dyes Containing the β - hydroxy-ethyl Sulfonyl Sulfuric Ester Group for Polyamide Fibres

合成纤维及其混纺纤维用染料的研究Ⅰ.用于锦纶染色的含β-羟乙基砜硫酸酯基活性分散染料

Esterase could catalyze the hydrolysis of ester group in the polyester macromolecular and introduce hydrophilic group into the hydrophobic PET fiber . The lubricity and handle feeling of PET fiber could be improved .

酯酶可以催化涤纶大分子中的酯基水解，为疏水性的涤纶引入亲水性基团，明显提高涤纶的润湿性及手感。

The total effective rates for raising HDL-C in mannose ester group and fenofibrate group were 86 % and 84 % , respectively . The difference between the two groups was not significant ( P > 0.05 ) .

升高HDLc总有效率分别为86%与84%，但两组间比较差异无统计学意义（P>0.05）。

When the amount of air was very few , even if the temperature was higher , the degree of oxidation of hydroxyl group and of hydrolysis and rancidity of ester group of castor oil was also very few .

当空气量很少时，即使在较高温度下，蓖麻油羟基氧化、酯基水解酸败程度也很小。

Methods Eighty-four patients with hyperlipidemia were randomly divided into 2 groups . Mannose ester group of 43 patients received mannose ester tablet 100 mg , orally , three times a day , eight weeks as a course .

方法84例原发性高脂血症患者随机分为2组：甘糖酯组43例，口服甘糖酯100mg，每日3次；

Ion group was introduced into the IPN by hydrolyzing the ester group of MMA , it was shown that , after ionization , the tensile strength and module of the IPN considerably increased , elongation and flowability decreased .

对IPN中的甲基丙烯酸甲酯进行离子化，考察了离子化对IPN性能的影响。结果表明，经离子化后，IPN的断裂强度和模量均显著提高，断裂伸长率降低，流动性能下降。

As expected , proteins of trypsin and hepatitis surface antibody were immobilized onto the SuMA grafted PET fibers successfully under the neutral aqueous solutions , which was realized through the reaction between the active ester group of SuMA and amino group of protein .

如所期望的那样，接枝在PET纤维上的SuMA，在近中性的水溶液中，通过其活性酯基与蛋白质的&NH2反应，成功实现了对胰蛋白酶和肝炎表面抗体的固定化；

Experimental results showed that pyridinium TSILs containing the same anion had the same miscibility with conventional organic solvents . The miscibility between these N-ester appended pyridinium task-specific ionic liquids and ethyl acetate decreased for the grafted ester group .

结果表明，阴离子相同的N-酯基功能化离子液体与常规溶剂的相溶性基本相同，由于酯基的引入，这类离子液体与乙酸乙酯的相溶性降低。

The X-ray crystal structure analysis revealed that the compound has carbonyl group , carboxyamide group , ester group and bromine atom , and the one dimension chain structure of the title compound is formed through the hydrogen bond between N ( 2 ) H and O ( 2 ) .

X射线晶体结构的分析表明该化合物含羰基、酰胺基、酯基与溴原子，并且通过N（2）H与O（2）分子间氢键连成一维链状结构。

The photoproduct analysis showed that mono - ( 2-ethylhexyl ) phthalate and phthalic acid were produced during DEHP UV-photolysis in all pH solutions , which meant that the ester group of DEHP broke down and then reacted with H + / OH - .

在不同pH溶液中DEHP紫外光解都生成了邻苯二甲酸单异辛酯和邻苯二甲酸，推测反应机制为：紫外光激发诱导DEHP酯基团断裂，并与H+或OH-进行结合反应。

The polypeptide methyl esters were protonated at the ester group , and the fragmentation started on the carboxyl terminal of oligo-peptides methyl ester in ESI-MS / MS. The self-assembly into peptides of amino acids mediated by phosphorus is possessed by the chiral selectivity .

多肽化合物在ESI-MS／MS分析中发生裂解时，首先脱去甲醇或氨基酸甲酯，然后从羧端开始断裂酰胺键，并依次脱去氨基酸片段。

Their extraction ability markedly decreases with the increase of the steric hindrance from ester alkyl group .

萃取能力随着酯烷基空间位阻的增大而显著降低。

The oxime ether ( ester ) group at C-6 position have significant effect on the biological activity , so it is the absolutely necessary active center .

6-位肟醚（酯）基对生物活性影响较明显，为必不可少的活性中心。