A wide variety of natural products , e . g . alkaloids , - lactames , biotin , amino sugars has been synthesized by 1 , 3 - dipolar cycloaddition reaction between nitrones and alkenes 通过硝酮与烯烃化合物的1 , 3 -偶极环加成反应合成了许多天然?物,如生物硷、 -内酰胺、生物素、氨基糖等。
A wide variety of natural products , e . g . alkaloids , - lactames , biotin , amino sugars has been synthesized by 1 , 3 - dipolar cycloaddition reaction between nitrones and alkenes 摘要通过硝酮与烯烃化合物的1 , 3 -偶极环加成反应合成了许多天然?物,如生物硷、 -内酰胺、生物素、氨基糖等。
Abstract : a wide variety of natural products , e . g . alkaloids , - lactames , biotin , amino sugars has been synthesized by 1 , 3 - dipolar cycloaddition reaction between nitrones and alkenes 文摘:通过硝酮与烯烃化合物的1 , 3 -偶极环加成反应合成了许多天然产物,如生物碱、 -内酰胺、生物素、氨基糖等。
Sanders cc , barry al , washington ja , et al . detection of extended - spectrum beta - lactamase - producing members of the family enterobacteriaceae with the vitek esbl test j . j clin microbiol , 1996 , 34 ( 12 ) : 2997 沈定霞,周贵民.产超广谱-内酰胺酶细菌的研究近况j .国外医学临床化学与检验学分册, 1999 , 20 ( 1 ) : 24
The technology and market of caprolactam ( cpl ) were reviewed . the primary factors influencing the price of cpl were analyzed and the technology how to reduce the production cost was discussed 摘要概述了己内酰胺行业的生产技术及市场消费情况;对影响己内酰胺产品价格的主要因素进行了分析;对降低己内酰的成本工艺路线进行了探讨。
The principle , characteristics and recent applications of - lactam antibiotics are introduced and reviewed . moreover , the application prospects and potentiall for both strategies are evaluated 摘要介绍了在-内酰胺类抗生素酶法合成中两大策略的原理、各自特点、目前的应用情况,并将其进行了比较,评价了各自的应用前景及开发潜力。
There are several major petrochemical intermediates that are presently manufactured with high - purity oxygen including ethylene and propylene oxide ( antifreeze ) , vinyl chloride ( for pvc ) , and caprolactam ( for nylon ) 目前,几种重要的石化半成品是用高纯度氧生产的,包括乙烯、环氧丙烷(防冻剂) 、氯乙烯(用于pvc )和己内酰胺(用于尼龙) 。