Therefore, there is {HEAD ~ demand} for {TAIL ~ a fluorescence measuring apparatus} capable of reducing the dispersion of data on measured fluorescence in order to measure a fluorescence relaxation time etc 
for
Therefore , there is { HEAD ~ demand } for { TAIL ~ a fluorescence measuring apparatus } capable of reducing the dispersion of data on measured fluorescence in order to measure a fluorescence relaxation time etc
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH