12309
The interfacial behavior of beta - casein ( beta CS ) has been investigated in presence of the cationic surfactant dodecyl trimethyl ammonium bromide ( DoTAB ) at the water / hexane interface and compared to that obtained for the water / air interface .
 Chemical: dodecyl trimethyl ammonium bromide; Chemical: DoTAB; Chemical: hexane
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: dodecyl trimethyl ammonium bromide; Chemical: DoTAB; Chemical: hexane