11. Additives of the mineral manganese dioxide or arsenic, allowed the glass to appear colourless. 12. Quinone was originally prepared industrially by oxidation of aniline, for example by manganese dioxide . 13. The design employed laser-scribed graphene, or LSG with manganese dioxide . 14. On the show tour, deposits of calcite, manganese dioxide , and ferric oxide are apparent. 15. Manganese dioxide is, therefore, the most widely used depolarizer.16. Batteries require " electrolytic manganese dioxide " while ferrites require " chemical manganese dioxide ". 17. Electrolysis of manganese sulfate yields manganese dioxide , which is called EMD for electrolytic manganese dioxide. 18. In 2002, more than 230, 000 tons of manganese dioxide was used for this purpose. 19. Manganese dioxide is then added and the flask stoppered.20. Batteries require " electrolytic manganese dioxide " while ferrites require " chemical manganese dioxide ".