13937
Increased protein sorption in poly ( acrylic acid ) - containing films through incorporation of comb - like polymers and film adsorption at low pH and high ionic strength .
 Chemical: poly ( acrylic acid )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: poly ( acrylic acid )