18374
In the present study , to evaluate the phytotoxicity and genotoxicity of NB on plants , Vicia faba was exposed to increasing concentrations of NB ( 5 mg L ( - 1 ) , 10 mg L ( - 1 ) , 25 mg L ( - 1 ) , 50 mg L ( - 1 ) , and 100 mg L ( - 1 ) ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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