23446
Classical MTT assays have been performed to evaluate the production of formazan in DMEM - F12 and RPMI - 1640 cell culture media ( containing 10 % fetal bovine serum - FBS ) treated with Degussa - P25 TiO2 nanoparticles , in the absence of cells .
 Chemical: MTT; Chemical: formazan; Chemical: P25 TiO2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: MTT; Chemical: formazan; Chemical: P25 TiO2