18652
The nanoemulsion used in our study was an oil - in - water emulsion droplet of average size ~ 190 nm containing ferrimagnetic iron oxide nanoparticles of average size ~ 10 nm .
 Chemical: iron oxide
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: iron oxide