酯

So the bio (β-acryloxyl ethyl) esters of acrylic rosin (AR-2-HEA) with majorcomposition of bio-(β-acryloxyl ethyl) esters of acrylic pimaric acid were also prepared through acylchloridation and esterification.

同样采用酰氯化、酯化手段合成了丙烯酸松香酯，其主要组成为丙烯海松酸二酯。

In order to raise the hydrolysis resistance of ester oil, a new polycarboxylic acid ester is developed and its hydrolysis resistance is better than that of average polyol ester.

为了提高酯类油的抗水解性能，开发了一种新型的多元酸酯，其抗水解性能优于多元醇酯。

Kinetic reaction behavior of neo- polyhydric alcohols with fatty acids catalyzed by sulfuric acid was studied.

比较了Brnsted酸，包括硫酸、磷酸、对甲苯磺酸，催化季戊四醇与脂肪酸的酯化反应行为，结果表明，硫酸催化酯化反应速率最快，能有效催化不同类型的新戊基多元醇与脂肪酸的酯化反应，羟基转化率达到98%以上。

The method comprises the following steps: fermenting the project bacterial for expressing polyhydroxy fatty acid ester with the fermentation culture medium of 5-20g/l 5-18 carbon chain length fatty acid.

一种表达聚羟基脂肪酸酯的方法，是用含有浓度5-20g/L的碳链长度为5-18的脂肪酸的发酵培养基对本发明的用于表达聚羟基脂肪酸酯的工程菌进行发酵，得到聚羟基脂肪酸酯。

It has been reported that sulfation of polysaccharides affect strongly on their immunocyte activity and anti-tumour bioactivities, but the sulfatation of polyporus umbellatus polysaccharides has not been reported.The thesis synthesize the sulfate polyporus umbellatus polysaccharides for the first time.

据报道，多糖的硫酸酯化对多糖的免疫细胞活性、抑制肿瘤等生物活性等有很大影响，但是国内外未见猪苓多糖硫酸酯化的相关研究与报道，本实验首次制备得到猪苓多糖硫酸酯，具有创新性。

It is shown that the cyanate resin has low cure reactivity and high flowability, so the resin flow can not be controlled easily. The precure process makes the resin cure to a certain extent, decreases resin flowability, improves resin processability significantly, and enhances the composite laminates quality.

研究结果表明，该氰酸酯树脂反应活性低且流动性高，热压工艺中树脂流动不易控制；预固化可使氰酸酯树脂发生一定程度的自聚反应，从而降低其流动性，可明显改善氰酸酯树脂的工艺性，提高了层板的成型质量。

Mono(2-hydroxy propyl)phosphate was synthesized from 1, 2-epoxy propane and phosphoric acid in the propanone solvent under the conditions of reaction temperature 30 ℃, reaction time 2 h.

摘 要：以环氧丙烷、磷酸为原料合成了磷酸单( 2-羟基丙基)酯，并以磷酸单(2-羟基丙基)酯和三氧化二锑为原料合成了磷酸单(2-羟基丙基)酯锑。

Then the cyclocarbonylation of propargylic alcohols under the catalysis of Pd 〓 with CuBr〓 and BQ was studied. Due to the high activity the yields of -α-bromoalkylidene-β-lactones were lower than that of -α-chloroalkylidene-β-lactones while the coupling reaction of -α-bromoalkylidene-β-1actones (i. e. Sonogashira and Suzuki coupling reaction) was quite smooth to afford the products in high yields.

接着我们研究了炔丙醇在Pd〓-CuBr〓-BQ催化体系下的羰基插入环化反应，由于-α-溴代亚烷基-β-内酯环化合物的活性高于-α-氯代亚烷基-β-内酯环化合物，导致反应收率偏低，而同样基于此原因，-α-溴代亚烷基-β-内酯环化合物的偶联反应进行得很顺利，而且收率很高。

Two kinds of new intermolecular complex antioxidants 3-(3, 5-di-butyl-4-hydroxyphenyl) propionyl pentaerythritol phosphate and octstearic pentaerythritol tetra- phosphite were synthesized by one-pot and two steps transesterification.

分别采用一锅法和两步酯交换法合成了两种新型分子内复合型抗氧剂，即3-(3，5-二叔丁基-4-羟基苯基)丙酰亚磷酸季戊四醇酯和八硬脂基季戊四醇四亚磷酸酯。

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。

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。