Thus, the visible laser radiation is used to facilitate {HEAD ~ the detection} of ambient NO and NO from NO2 by {TAIL ~ REMPI} and to discriminate these species from more complex nitrocompound analytes 
by
Thus , the visible laser radiation is used to facilitate { HEAD ~ the detection } of ambient NO and NO from NO2 by { TAIL ~ REMPI } and to discriminate these species from more complex nitrocompound analytes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH