Upon {TAIL ~ UV illumination} the dye compounds display {HEAD ~ intense absorption} as well as visible fluorescence emission 
Upon { TAIL ~ UV illumination } the dye compounds display { HEAD ~ intense absorption } as well as visible fluorescence emission
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH