19238
The mean particle size , mainly dependent upon PLGA / PEO - PPO - PEO ratio , was in the range of 112 - 125nm , with narrow unimodal distribution ( PDI ~ 0 . 1 ) .
 Chemical: PLGA; Chemical: PEO - PPO - PEO
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: PLGA; Chemical: PEO - PPO - PEO