6655
Dual functional peptides have both biological ( e . g . antioxidant , ACE - inhibition , opioid activities ) and technological ( e . g . nanoemulsification abilities ) functions in food systems .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None