... and acceptor, N is the refractive index ofthe med-
ium, F is the fluorescence quantum yield ofthe donor in
the absence ofthe acceptor and J is the overlap integral
between the donor fluorescence ... ofthe emission spectrum ofthe donor with the
absorption spectrum ofthe acceptor. The energy transfer
efficiency E is related to the distance (r
0
) between acceptor
and donor, and also to the ... genistein. The A and C
rings ofthe isoflavones are similar to the A and B rings of oestra-
diol. The actual distance between the two hydroxyl groups on both
the molecules is nearly identical; these...