19242
Zeta potential values indicated that presence of PEO - PPO - PEO in the formulations shielded the high surface negative charge of PLGA .
 Chemical: PEO - PPO - PEO; Chemical: PLGA
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: PEO - PPO - PEO; Chemical: PLGA