13940
Moreover , the ( PAH / PHEMA - g - PAA ) n films sorb 2 - to 4 - fold more protein than corresponding films prepared with linear PAA , and coatings deposited at pH 3 . 0 sorb more protein than coatings adsorbed at pH 5 . 0 , 7 . 0 , or 9 . 0 .
 Chemical: PAH; Chemical: PHEMA - g - PAA; Chemical: PAA
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: PAH; Chemical: PHEMA - g - PAA; Chemical: PAA