6638
The success of bioconjugation in the gel phase is quantified through the use of a cell - adhesive peptide and visualization of cell adhesion on PVA hydrogels as cell culture substrates .
 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