23228
Eventually , optimized drug release ( 5 - 10min mean dissolution time , 50 - 55 % bioadhesion retention ) could be achieved with 550 mu m pellet size , containing carbomer and hydroxyethylcellulose in 85 : 15 ratio .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None