{HEAD ~ The molecular weights} of the nonionic surfactant are preferably in {TAIL ~ the range} from 500 to 3000 g/mol 
{ HEAD ~ The molecular weights } of the nonionic surfactant are preferably in { TAIL ~ the range } from 500 to 3000 g / mol
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH