non-isothermal experiments in oxygen atmosphere. Corresponding
values of oxidation onset temperatures from non-isothermal
measurements with pre-heating in nitrogen atmosphere are summarised
in Table 1. Again, the kinetic parameters were obtained
from the dependence of the oxidation onset temperatures on the
heating rates and the lengths of IP were calculated. It can be seen
that at 25 C the stability of poppy seeds in pure oxygen is significantly
lower than in air, while at 150 C the influence of the atmosphere
is almost negligible. Isothermal records obtained in oxygen
atmosphere are depicted in Fig. 4. In this case, the oxidation peak is
still relatively flat, however, its onset can be read more accurately