Rawmill, · Strontium and barium act as calcium replacements, and only start to reduce clinker reactivity at levels of 1.5% and 0.2% respectively. Toxic heavy metals : among these, low levels of arsenic , selenium , cadmium , antimony and tungsten are not a problem, because they are absorbed in the basic clinker structure as anions.Calling Your Attacks, · Johnny Alpha from Strontium Dog does much the same thing. "Number Four Cartridge!" In another early 2000 AD title, Flesh, the characters would sometimes narrate their own fight scenes. "I'll use my whip to cut this giant spider in half." "I'll kill this spider with.