6637
Further , microstructured , surface - adhered PVA physical hydrogels are assembled , the available conjugation sites within the hydrogels are quantified , and quantitative kinetic data are collected on peptide conjugation to the hydrogels .
 Chemical: PVA
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: PVA