15125
To elucidate the genotoxicity mechanisms of LTC , the micronuclei ( MN ) frequencies , the levels of reactive oxygen species ( ROS ) , erythrocyte osmotic fragility , nitrite ( NO ) formation , protein carbonyl ( PCO ) levels and malondialdehyde ( MDA ) production were evaluated for a period of 7 , 14 and 21 days .
 Chemical: LTC; Chemical: oxygen; Chemical: nitrite; Chemical: NO; Chemical: carbonyl; Chemical: malondialdehyde; Chemical: MDA
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: LTC; Chemical: oxygen; Chemical: nitrite; Chemical: NO; Chemical: carbonyl; Chemical: malondialdehyde; Chemical: MDA