14137
Studies have shown that synthetic pools combined from individual aptamers have the capacity to inhibit growth of S . enteritidis and S . typhimurium in bacterial cultures ; this was the result of a decrease in their membrane potential .
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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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