selectivity

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

对于不同类型的林分也有不同的趋向，对灌木、小乔木等的害虫防治果显著，而对于比较高大树木上的害虫防治果较差。

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

第二，选择只与表面的库伦作用力有关。

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

用溴代苯乙酮和溴苄化试剂,以高产率和100%的转化率以及100%的选择得到了酚的O-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的生化发酵工程,且好氧发酵。

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的不对称氢转移反应等的催化反应中，可以得到很高的产率和对映选择。

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甲吡啶原料,在固定床反应器中通过含氧化钒的催化剂发生气固相接触氨氧化反应制备雷米封中间体4氰吡啶,4甲吡啶的转化率99%,4氰吡啶的选择88%,收率87。