the last years an intense debate has arisen regarding the existence
of non-thermal effects of electro-magnetic fields (EMF) on
biological systems, i.e. effects due to a direct interaction between
fields and matter without energy exchange.
to now, the literature is controversial in this sense and no clear
and systematic experimental evidences are present. For this reason
it is necessary to perform experiments that use simple protocols and
study simple model organisms, so that many measurements can be
performed easily under biologically and technically well controlled
have performed measurement on a simple mono-cellular biological
system, the yeast Saccharomyces cerevisae representative of
eukaryote cells. The yeasts were continuously submitted to static or
AC magnetic fields for 6 hours, corresponding to 3 duplication times,
and the cell proliferation of the exposed and the sham samples was
checked. In particular the samples were exposed to static magnetic
fields (MF) of 1G, 10G, 100G, 1000G and AC magnetic fields of
5G-50Hz, 5G-16Hz, 5G-8Hz
attention was devoted to design a simple and repeatable experimental
procedure and to reduce as much as possible the experimental errors.
Moreover, a careful evaluation of the errors involved in each step
of the measure was done. test.
results show the importance of the modulation of the magnetic fields.
Indeed, a similar effect for S. cerevisiae exposed to a very high
static magnetic field (1000 G) and to a lower value of magnetic
field modulated at frequency of 50 Hz (5G-50Hz) was found. In both
cases a decrease of about 12% in the cell concentration is detected
with a confidence level of 2%. No effect is detected for all the
other exposure conditions.
explain the controversial results shown in literature about the
effects of CEM on biological systems, one possibility is the
interaction between the CEM and the nervous system that
produces different effects for different subjects. It is than
important to study the possible effects of CEM on
collaboration with the Pharmacy Department measurements are in
progress to study the effect of CEM of 900 MHz , 1V/m on mouse
astrocyte. Preliminary results have shown the Importance of
modulation of CEM. Indeed, no effects were detected without
modulation of the CEM while a difference in the cells vitality is
present if the CEM is modulated.
with measurements of Delayed Luminescence (DL) on collagen, the
dielectric permittivity has been measured on bovine Achilles’
tendon in the frequency range 500Hz-10MHz as a function of the water
in the dielectric permittivity as a function of the water content
are similar to changes of the total number of photons emitted in
Delayed Luminescence (DL) experiments.
data at each frequency value show a sudden decrease of the
permittivity when the tendon humidity decreases. Moreover the values
of dielectric permittivity for low frequency are very high, like in
some ferroelectric materials, and can not be explained using
measurements allows to investigate the role of water network in
collagen structure as well as the possible existance of collective
states based on dipole-dipole electromagnetic interaction.