2562
The cationic polymer polyethylenimine ( PEI ) or the cationic lipid oleylamine ( OAM ) were added to monoolein ( MO ) - based systems in different concentrations , and after dispersion in aqueous medium , liquid crystalline phase nanodispersions were obtained and characterized by their physicochemical properties .
 Chemical: polyethylenimine; Chemical: PEI; Chemical: oleylamine; Chemical: OAM; Chemical: monoolein
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: polyethylenimine; Chemical: PEI; Chemical: oleylamine; Chemical: OAM; Chemical: monoolein