3442
Whole body Ti concentrations increased significantly in fish exposed to both the 1 . 0 mg l ( - 1 ) TiO ( 2 ) NP and bulk TiO ( 2 ) compared to controls , but concentrations returned to control levels by the end of the recovery period .
 Chemical: Ti; Chemical: TiO ( 2 ); Chemical: TiO ( 2 )
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: Ti; Chemical: TiO ( 2 ); Chemical: TiO ( 2 )