Prior to reaction, the reaction mixure is given {HEAD ~ an effective amount} of {TAIL ~ a non ionic detergent}, and agitated 
Prior to reaction , the reaction mixure is given { HEAD ~ an effective amount } of { TAIL ~ a non ionic detergent } , and agitated
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH