1) configuration transformation

构型转化
1.
L-histidine and DL- phenylglycine can be obtained by protein hydrolysates or chemical synthesis, while D-histidine and D-phenylglycine are difficult to obtained from natural products in large quantities and always be obtained by configuration transformation .
L-组氨酸和DL-苯甘氨酸可通过发酵法、蛋白质水解或化学合成获得,D-组氨酸和D-苯甘氨酸难以从天然产品中大量提取,要通过构型转化或拆分获得,价格高昂。
2) isomerization
[ai,sɔmərai'zeiʃən]

构型转化
1.
Objective:To investigate the isomerization of monomethyl maleate catalyzed by the combination of NaBr and K2S2O8.
目的:探讨溴化钠和过硫酸钾催化下马来酸单甲酯的构型转化反应。
2.
Objective To investigate the isomerization of monomethyl maleate catalyzed by the combination of H 2NCSNH 2,HCl and NaHSO 3.
目的 :探讨硫脲、盐酸和亚硫酸氢钠催化下马来酸单甲酯的构型转化反应。
3) structural transition

构造转型
1.
Characteristics and prospecting meaning of sedimentary basin in structural transitional stages in Kongdian formation of Jiyang depression;
济阳孔店构造转型期沉积盆地的特征及勘探意义
2.
The basin evolution history is analyzed in the view of structural transition and its stage on the basis of some reversal structures founded in recent years in Jiyang depression.
依据济阳坳陷近几年发现的一些反转构造 ,从构造转型和构造转型期角度对其演化史进行了分析 ,认为济阳坳陷的演化经历过四次大的周期性构造转型 ;指出孔店组沉积时期是济阳坳陷从中、古生界构造体系向第三系构造体系转换的重要转型期。
4) rotor configuration

转子构型
1.
The effects of different rotor configuration on carbon black dispersion and the mechanical properties of rubber compound were studied.
主要研究了不同转子构型对炭黑分散性及胶料力学性能的影响。
5) configurational transition

构型转换
1.
Structural optimization and configurational transition of C_n(n=2-20);

碳原子簇 C_n(n=2-20)的结构优化及构型转换
6) geometric structure change

构型转变
补充资料:构型转化
当旋光化合物(见旋光异构)分子发生化学反应时,如果试剂进攻手征性基团,则生成产物的构型(见分子的构型)往往与原分子的构型相反,即由R构型变成S构型或由S构型变成R构型,这种转化仅指发生反应的手征性基团部分。通常,在双分子亲核取代反应(见亲核反应)中几乎都发生构型转化,例如在卤代烃的水解反应中:
OH-总是从卤素的反方向进攻碳原子,生成含有五配位体的中间过渡态,这时RR′R″处于与OH、X基成垂直的平面上。当卤原子离开时,则RR′R″基翻转过来,产物就转化为与原物相反的构型。
OH-总是从卤素的反方向进攻碳原子,生成含有五配位体的中间过渡态,这时RR′R″处于与OH、X基成垂直的平面上。当卤原子离开时,则RR′R″基翻转过来,产物就转化为与原物相反的构型。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条