5779
Morphology and thickness of phages are studied at different counterion concentrations ( 10 ( - 3 ) , 10 ( - 2 ) and 10 ( - 1 ) M ) by AFM , SEM and immunofluorescence analyses .
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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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