24273
We synthesized SPIO - Cy5 - PICsomes ( superparamagnetic iron oxide nanoparticle - loaded Cy5 - cross - linked Nano - PICsomes ) and characterized them using dynamic light scattering and transmission electron microscopy in vitro and evaluated their ability to detect subcutaneously grafted tumors in vivo with MRI .
 Chemical: iron oxide
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: iron oxide 
Answer:
 Chemical: iron oxide