11. Several randomized, controlled trials have found that zinc sulfate , consumed orally, often reduces or eliminates warts. 12. Ewes were made anosmic by irrigation of the nostrils with a zinc sulfate and procaine solution. 13. The company alerted state officials, and the contamination was traced to zinc sulfate imported from China. 14. Testing in vitro has shown better antimicrobial activity with TBZC than both zinc sulfate and zinc oxide. 15. Zinc is extracted from the purified zinc sulfate solution by electrowinning, which is a specialized form of electrolysis. 16. Preparations are available as a zinc sulfate solution for adults, a modified solution for children and in tablet form. 17. As the current was drawn, a layer of zinc sulfate solution would form at the top around the anode. 18. When heated over 680 C, zinc sulfate decomposes into sulfur dioxide gas and zinc oxide fume, both of which are hazardous. 19. The porous pot cell consists of a central zinc anode dipped into a porous earthenware pot containing a zinc sulfate solution. 20. The zinc sulfate dosage used in medical trials for treatment of warts was between 5 and 10 mg / kg / day.