28779
In this study , transcriptional and catalytic responses of antioxidant and biotransformation parameters were analyzed after a 4 - week exposure of a marine invertebrate , Mytilus galloprovincialis , to chemical mixtures from low polluted and highly polluted sediments .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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