18697
In this study , we evaluated the genotoxic effects of the water - soluble fraction ( WSF ) of heavy oil on the brackish / freshwater amphipod Quadrivisio aff . lutzi , which is common in the coastal lagoons of southeastern Brazil , using hemocytes obtained from single amphipods ( without pooling ) after optimizing hemolymph extraction .
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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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