201
The efficiency of oral absorption of said drug from such type of formulation depends on many formulation - related parameters , such as surfactant concentration , oil / surfactant ratio , polarity of the emulsion , droplet size and charge , all of which in essence determine the self - emulsification ability .
 None
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:  
Answer:
 None