7357
The difference in interfacial stabilization was also shown by cryo - scanning electron microscopy and scanning force microscopy , which displayed very different morphologies at the polar - apolar interface for the unmodified ferritin , pure PNIPAAm , and the ferritin - PNIPAAm conjugate , respectively .
 Chemical: PNIPAAm; Chemical: PNIPAAm
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: PNIPAAm; Chemical: PNIPAAm