Stripping of gold , silver and copper from loaded quaternary ammonium salt by acidified thiourea solution .

硫脲反萃取季铵盐负载有机相中金、银、铜。

Incubation test results showed that thiourea and inhibitors combination took on a conspicuous inhabitation on urease activities with a valid inhabitation period being two weeks .

培养试验表明,硫脲及抑制剂组合对土壤脲酶活性有显著的抑制作用,抑制时间为2周。