6970
In water at pH 7 . 4 , the co - polymer assembled spontaneously into 13 . 2 +/- 3 . 1 nm micelles with a critical micelle concentration ( CMC ) of 36 mu M .
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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