The method 2 wherein said {TAIL ~ quaternary ammonium salt} comprises {HEAD ~ an alkyl dimethyl benzyl ammonium chloride} 
The method 2 wherein said { TAIL ~ quaternary ammonium salt } comprises { HEAD ~ an alkyl dimethyl benzyl ammonium chloride }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD