Two series of thermotropic liquid crystalline polyureas were synthesized by the copolymerization of benzidine ( or o tolidine ) 1 hexane diamine and 2 toluene diisocyanate .

为合成新型热致液晶聚脲，以含液晶基元的联苯二胺（或 联 邻甲苯胺）、1己二胺、2甲苯二异氰酸酯为原料进行合成。

Some tested chemical agents seemed not to contribute to the increase of the enzyme production effectively except for syringaldazine and o tolidine .

某些化学试剂对酶的产量尚未达到诱导效果，但丁香醛连氮和邻 联 甲 苯胺对酶产量有一定的 促进 作用。