numerous experimental data accumulated on DL of biological systems
showed the strong correlation of the properties of DL with the state
of the system.
posses specific delayed photoluminescence whose properties differ
significantly from those of similar devitalised organisms, and both
are different from non-living systems and depend on the physical,
chemical, physiological and other conditions and pre-history of the
present there are only few theoretical models of this phenomenon,
but neither can explain in a self-consistent way the wide range of
the kinetics of DL, including exponential, simple hyperbolic and
much more complicated time decays, and its correlation with the
conditions of experiments.
on the previous theoretical studies of the nonlinear mechanisms of
charge and energy transfer in biological systems and coherent
collective electron states in the solid state systems of the reduced
dimensionality, the possible role of electro-solitons in the
photoluminescence of biological systems has been considered.
the result, the soliton model of the DL has been developed. This
model takes into account the experimental fact that the DL lasts
from few seconds to few hours, which indicates that to a great
extent it is related to the long-living photoinduced excitations in
from ox Achilles’ tendon is found to depend on the order
parameters of the collagen fibres and on both water content and the
temperature, which affect those parameters.
Together with these measurements the dielectric
permittivity has been measured in the frequency range
500Hz-10MHz as a function of the water content. Moreover the values
of dielectric permittivity for low frequency are very high, like in
some ferroelectric materials, and can not be explained using
classical models. Changes in the dielectric permittivity as a
function of the water content are similar to changes of the total
number of photons emitted in DL experiments.
correlated solitons model is in progress with the aim to
describe both qualitatively and quantitatively the main features of
the DL and of dielectric permittivity in this system.