title: Demonstration of sulphydryl groups through menadione-NBT.
mesh_terms: D000818:Animals; D006651:Histocytochemistry; D009285:Naphthoquinones; D009417:Nerve Tissue / Q000032:analysis*; D051381:Rats; D012867:Skin / Q000032:analysis*; D013438:Sulfhydryl Compounds / Q000032:analysis*; D013778:Tetrazolium Salts
chemical_list: D009285:Naphthoquinones; D013438:Sulfhydryl Compounds; D013778:Tetrazolium Salts