selectivity

The preys spectrum had certain selectivity,appulsive on the Lepidoptera especially the large-scale larva, appulsive on differentstand also.

对于不同类型林分也有不同趋向，对灌木、小乔木等害虫防治果显著，而对于比较高大树木上害虫防治果较差。

Second, the selectivity depends on the Coulomb interaction on the surface, not the lipophilicity.

第二，选择只与表面库伦作用力有关。

The phenols were O-alkylated with 100% conversion and 100% selectivities using phenacyl bromide and benzyl bromide as alkylating reagents.

用溴代苯乙酮溴苄为烷基化试剂,以高产100%转化以及100%选择得到了酚O-烷基化产物。

Glutamic acid fermentation is a kind of biochemistry fermentation engineering.Its selectivity is undivided comparatively.It is oxybiotic fermentation and is strict to air quality.

谷氨酸发酵是一种对发酵菌种选择比较专一生化发酵工程,且为好氧发酵。

The invention is applied to the catalytic reactions such as aromatic ketone unsymmetrical hydrogen transfer reaction and can achieve very high yield and enantiotropic selectivity.

此发明应用于芳香酮不对称氢转移反应等催化反应中，以得到很高产对映选择。

Cyanopyridine,intermediate of rimifon, was synthesized from 4-picoline using vanadium oxide as a catalyst in a fixed-bed reactor, reached 99% conversion of 4-picoline, 88% selectivity and 87.

以4甲基吡啶为原料,在固定床反应器中通过含氧化钒催化剂发生气固相接触氨氧化反应制备雷米封中间体4氰基吡啶,4甲基吡啶转化为99%,4氰基吡啶选择为88%,收为87。