21769
PP - PPI at pH 8 . 0 had the highest oil absorption capacity , emulsion activity and foam capacity , whereas , PP - PPI at pH 10 . 5 had the highest WAC .
 None
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