18387
OciBest (TM) ( 10 . 0 - 100 . 0 micro g / mL ) did not show structural chromosomal aberrations or increase in MN induction , with and without S9 , at the tested dose range in both 4 - h and 18 - h exposure cell cultures .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None