12045
SiO ( 2 ) NPs ( concentration range 25 - 200 micro g / ml ) induced dose - dependent cytotoxicity in both types of cells , which was demonstrated by cell viability ( 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazoliumbromide ) and lactate dehydrogenase leakage assays .
 Chemical: SiO ( 2 ); Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazoliumbromide; Chemical: lactate
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: SiO ( 2 ); Chemical: 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyltetrazoliumbromide; Chemical: lactate