... quaternary ammonium compound 季铵化合物 quaternary base 季碱 quaternary carbon atom 季碳原子 ...
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莲心碱的季铵盐与箭毒块茎碱的化学结构不同，缺少一个氧醚键。
The quaternary ammonium salts of liensinine differ from d-tubocurarine by one less ether linkage in chemical structure.
经MP、IR鉴定的结果判定，白色粉末状物为倒千里光裂碱-活性酯结合的季铵盐。
The white powder was quatermary salt of retronecine ester identified by MP, IR.
于1984年生长季，利用氚水作为示踪剂对河北隆化碱房乡大水泉村西山28年生油松人工林树木蒸腾进行了测定。
Tritiated water was used as tracer to measure tree transpiration in a 28-year old Chinese pine plantation of north China during the growing season of 1984.
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