28165
Among these pernicious agents , the toxicity in diatoms by metal is linked to different steps in the transmembrane and internal movements of the toxicant , causing perturbations in the normal structural and functional cellular components .
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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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