But when it is of butyl or ethyl type the collector containing ureido radical has a collecting power much lower than that of the collector containing thioureido radical .
烃基为 己基时 2种捕收剂的捕收 能力 相近，但 烃基为丁基和乙基时含脲基 者的捕收能力远低于含 硫脲基者。
Synthesis and Biological Activity of O-Ethyl-N-Alkylphosphoro ( thioureido ) thioates
O-乙基-N-烷基（取代 硫脲 基）硫代磷酰胺酯的合成及其生物活性
美[θaɪoʊjʊ'ri:ɪdoʊ]英[θaɪəʊjʊ'ri:ɪdəʊ]
n.硫脲基