Up to 96 % ee was achieved with 4 - nitro - chalcone as enone substrate.以 4- 硝基查耳酮为原料的反应,其产物可获得最高达96%ee值.Chalcone synthase ( CHS ) gene is the key gene during the pathway of synthesizing anthocyanidin.查尔酮合成 酶 基因(Chalcone...
Opening its mouth, it lowed again as if in pain.这时母牛又张开嘴, "哞----"地叫了一声,仿佛有什么苦处似的.So he went away; but he said he "'lowed " to " lay " for that boy.于是汤姆就走了, 不过,他临走时说还要 寻机 再教训教训那混小子一顿.He lowed his head in shame, his c...
Global ecological efforts can easily be at odds with local ecologies.全球性生态保护工作很可能会和地方生态系统存在矛盾。Temperature records have unequivocally confirmed the existence of global warming.气温记录清楚无疑地证实了全球气候正在变暖。It is high time to consi...