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Finally , inhibited acetylcholinesterase ( AChE ) activity in animals exposed to contaminated sediments suggested a neurotoxic impact , whereas significant correlations between AChE and oxidative biomarkers may indicate connections with redox state regulation .
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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:
 None