31. Heating PaP 2 O 7 in air to 1400 �C decomposes it into the pentoxides of phosphorus and protactinium. 32. Reduction of arsenic pentoxide to arsenic trioxide increases its toxicity and bio availability, Methylation occurs through methyltransferase enzymes. 33. It is produced by the careful distillation of perchloric acid in the presence of the dehydrating agent phosphorus pentoxide : 34. "' Arsenic pentoxide "'is the inorganic compound with the formula As 2 O 5. 35. The use of vanadium pentoxide for the catalytic oxidation with air of various substances became his most profitable invention. 36. The properties of this aluminum oxide layer compared with tantalum pentoxide dielectric layer are given in the following table: 37. The properties of this niobium pentoxide dielectric layer compared with tantalum pentoxide layer are given in the following table: 38. The properties of this niobium pentoxide dielectric layer compared with tantalum pentoxide layer are given in the following table: 39. It held two vanadium pentoxide nanotube electrodes separated by an electrolyte that carried the electrical charge between the two. 40. Other additives used in crown glasses include zinc oxide, phosphorus pentoxide , barium oxide, fluorite and lanthanum oxide.
