7479
With the optimal film thickness , the adsorptions from bovine serum albumin , human serum , and human plasma onto the pSerMA - grafted surfaces , as evaluated by a surface plasmon resonance ( SPR ) biosensor , were 1 . 8 , 9 . 2 , and 12 . 9 ng / cm ( 2 ) , respectively , comparable to the traditional antifouling material such as poly ( ethylene glycol ) .
 Chemical: pSerMA; Chemical: poly ( ethylene glycol )
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: pSerMA; Chemical: poly ( ethylene glycol )