14.Archaean cell walls lack murein, a common component of bacterial cell walls, and their lipids have ether links rather than ester links.
古细菌的细胞壁缺乏细菌细胞壁组成的普遍物质-胞壁质,其连接是醚连接而不是酯连接。
15.The results showed that the main compound categories of aromatic components were alcohols, esters, terpenes and ketones for all half-highbush blueberry cultivars.
结果表明,半高丛越橘以醇类、酯类、萜类和酮类物质为主。
16.Tussore oil was extracted by chemical .The fatty acid (FA) in tussore oil was saponificated and modified to methyl esters by different means .
17.Flame retardant vinyl ester resin using tetrabromo bisphenol A, epichlorohydrin, acrylic acid as raw materials was also synthesized, Its flame retardant property was excellent.
用四溴双A、环氧氯丙烷和丙烯酸为原合成了阻燃型乙烯基酯树脂,其阻燃性能良好。
18.By using phase transfer catalyst, the yield of the preparation of cyclopropane carboxylic isopropyl ester was increased.
在环丙甲酸异丙酯的合成反应中,通过相转移催化剂提高了反应收率。
19.The synthesis of tridecane dicarboxylic acid diethyl ester with ethyl alcohol and tridecane dicarboxylic acid as reactants and cation exchange resin as catalyst had been studied.
20.Four compounds of phosphite ester and phosphoramide containing azido groups were synthesized. The molecular structure of the products has been confirmed by IR,1HNMR,FAB-MS and elemental analysis.