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