The medium lethal dose ( ld50 ) of rat is more than 5000mg / kg , which showed that the powder is toxicological harmless . the toxicological test confirmed that the powder did not irritant to the skin and eyes of rabbit . 5 ) the structure and properties of this anti - bacterial powder the powder " properti properties , stdi as high t ~ i ~ aure resimarinate stability , were tested 5 )抗菌粉體的性能測(cè)試與分析采用bet 、 sem 、 xrd 、 xps等手段分析了粉體結(jié)構(gòu)與抗菌性能的關(guān)系,發(fā)現(xiàn)了當(dāng)銀元素以離子狀態(tài)存在時(shí),具有良好的殺菌作用,當(dāng)銀元素以單質(zhì)狀態(tài)存在時(shí),殺菌效果不顯著。