1160
By investigating various conditions for the preparation of UQ / PLGA nanospheres such as the molecular weight of PLGA , PLGA concentration , and UQ concentration , UQ / PLGA nanospheres with increased stability and slower drug release at a higher drug loading efficiency were prepared .
 Chemical: PLGA; Chemical: PLGA; Chemical: PLGA; 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: PLGA; Chemical: PLGA; Chemical: PLGA; Chemical: PLGA