19327
Our new NCs have well - controlled physicochemical properties , including high drug loading , quantitative drug loading efficiency , controlled particle size with narrow particle size distribution , and sustained drug release profile over days without " burst " release effect as observed in conventional polymer / drug encapsulates .
 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