“…Titanium dioxide and modified forms including different commercially available forms, heat treated materials, and materials prepared by a range of techniques: 17,18,39,56,72,84,113,116,132,146,156,170,172,189,228,232,253,262,266,267,290,316,334,389,395,416,419,431,432,488,495,501,507,515,517,518,535,551,555,558,562,563,565,598,600,601,604,612,615,620,623,…”