27460
The hydrodynamic radii from DLS confirmed the presence of small micellar aggregates of radius ~ 2 nm in MTNa at pH ~ 7 . 54 at the lower concentrations , with coexisting micelles ( ~ 2 nm ) and vesicles ( ~ 50 nm ) at pH near 6 . 5 , vesicles ( radii ~ 70 nm ) at pH near 6 , and large vesicles ( 85 nm ) in MPNa at pH ~ 7 . 60 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None