26003
The particle size distribution and encapsulation efficiency of the microspheres depended dramatically on the type of PEG 12 , 000 that was used in the second phase of the ATPS .
 Chemical: PEG
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: PEG 
Answer:
 Chemical: PEG