在体外实验中已证实锌能拮抗某些金属对ALA-D的抑制作用。本实验欲证实在活体中锌对铅的此种拮抗作用。以30只家兔分三组。投给硫酸锌溶液,含锌量为22.5毫克/毫升;醋酸铅溶液,含铅量为28.0毫克/毫升。两者皆灭菌,注于背部皮下。第一组(1～10号兔)先后注射两次锌溶液,剂量分别为63毫克/公斤和202毫克/公斤。第二 In vitro experiments have shown that zinc can antagonize the inhibition of certain metals on the ALA-D. This experiment is intended to confirm the antagonism of zinc on lead in vivo. Thirty rabbits were divided into three groups. Cast zinc sulfate solution, zinc content of 22.5 mg / ml; lead acetate solution, lead content of 28.0 mg / ml. Both are sterile, note on the back of the skin. The first group (rabbits 1 to 10) injected twice with zinc solution at doses of 63 mg / kg and 202 mg / kg, respectively. second